sex-mode inherits scheme mode

uh oh

.github/workflows/build.yaml

@@ -1,55 +0,0 @@
-name: Sex CI
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  build-linux:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Install chicken
-      run: |
-        wget -N https://code.call-cc.org/releases/5.4.0/chicken-5.4.0.tar.gz
-        tar zxf chicken-5.4.0.tar.gz
-        sudo apt install -y make
-        make -C chicken-5.4.0 PLATFORM=linux
-        sudo make -C chicken-5.4.0 PLATFORM=linux install
-    - name: Install dependencies
-      # FIXME: [project-local deps]: use venv or something
-      # run: make deps
-      run: sudo chicken-install $(cat dependencies.txt)
-    - name: Make sure that sexc builds
-      # FIXME: sexc being built with local .eggs/ libs needs the path at runtime.
-      # Without it there will be `Error: cannot load extension: fmt`.
-      run: make sexc && ./sexc --help
-    - name: Run tests
-      # FIXME: [project-local deps]: use local deps or build with -static
-      # run: make run-tests
-      run: make sex-tests && ./sex-tests
-
-  build-macos:
-
-    runs-on: macos-15
-
-    steps:
-    - uses: actions/checkout@v3
-    - name: Install chicken
-      run: brew install chicken make
-    - name: Install dependencies
-      # FIXME: [project-local deps]: use venv or something
-      # run: make deps
-      run: chicken-install $(cat dependencies.txt)
-    - name: Make sure that sexc builds
-      # FIXME: sexc being built with local .eggs/ libs needs the path at runtime.
-      # Without it there will be `Error: cannot load extension: fmt`.
-      run: make sexc && ./sexc --help
-    - name: Run tests
-      # FIXME: [project-local deps]: use local deps or build with -static
-      # run: make run-tests
-      run: make sex-tests && ./sex-tests

.gitignore

@@ -1,5 +0,0 @@
-*.o
-*.import.scm
-*.link
-sexc
-sex-tests

Makefile

@@ -1,60 +1,19 @@
 CHICKEN_C = csc
-CSC_FLAGS += -K prefix -static
-# What and why:
-# -emit-all-import-libraries: Emit import-libraries for all defined modules.
-#    Used to generate .import.scm files so compiler would know how to use the modules.
-#    Without it, csc fails with "cannot import from undefined module" error.
-# -module-registration: Always  generate  module registration code, even when
-#    import libraries are emitted. Enables us to import from our modules at run time.
-#    Used in macros, where we inject `(import (only sex-macros cat))' before the macro body.
-#    Without it, sexc compiles scuccessfully, but is unable to process macros, failing with
-#    "during expansion of (import ...) - cannot import from undefined module: sex-macros"
-#     error.
-# -c: Stop after compilation to object files. This one is obvious.
 
-MODULE_FLAGS = -emit-all-import-libraries -module-registration -c
-
-# Order matters, since module check correctness on compilation
-MODULES = utils sex-macros reader sex-modules semen sex-fmt-c fmt-c-writer sexc
+MODULES = sexc templates main
 OBJ = $(MODULES:%=%.o)
 
-sexc: $(OBJ) main.scm
-	$(CHICKEN_C) $(CSC_FLAGS) main.scm -o sexc-tmp -link sexc
-        # otherwise csc hangs, probably because it tries to compile to sexc.o first
-	mv sexc-tmp sexc
+# chicken flags
+CFLAGS = -compile-syntax
 
-#------------------------------------------------------------------
+sexc: $(OBJ)
+	$(CHICKEN_C) $^ -o $@
 
-utils.o: utils.module.scm utils.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) utils.module.scm -o utils.o -unit utils
+main.o: main.scm
+	$(CHICKEN_C) $< -c -o $@
 
-sex-macros.o: sex-macros.module.scm sex-macros.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sex-macros.module.scm -o sex-macros.o -unit sex-macros
-
-reader.o: reader.module.scm reader.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) reader.module.scm -o reader.o -unit reader
-
-sex-modules.o: sex-modules.module.scm sex-modules.scm reader.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sex-modules.module.scm -o sex-modules.o -unit sex-modules -link reader,utils
-
-semen.o: semen.module.scm semen.scm sex-macros.o sex-modules.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) semen.module.scm -o semen.o -unit semen -link sex-macros,sex-modules,utils
-
-sex-fmt-c.o: sex-fmt-c.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sex-fmt-c.scm -o sex-fmt-c.o -unit sex-fmt-c
-
-fmt-c-writer.o: fmt-c-writer.module.scm fmt-c-writer.scm sex-fmt-c.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) fmt-c-writer.module.scm -o fmt-c-writer.o -unit fmt-c-writer -link sex-fmt-c,utils
-
-sexc.o: sexc.module.scm sexc.scm fmt-c-writer.o sex-macros.o sex-modules.o reader.o semen.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sexc.module.scm -o sexc.o -unit sexc -link fmt-c-writer,sex-macros,sex-modules,reader,semen,utils
-
-sex-tests:
-	$(MAKE) -C tests sex-tests
-	cp ./tests/sex-tests ./
+%.o: %.scm
+	$(CHICKEN_C) $< -e -c -o $@ $(CFLAGS)
 
 clean:
-	rm -f $(OBJ) main.o
-	rm -f *.import.scm
-	rm -f *.link
-	rm -f sexc sex-tests
+	rm -f $(OBJ) sexc

Readme.org

@@ -1,76 +1,66 @@
 * The Sex language
+Sex is a S-expressions language, which transpiles to C.
 
-#+NAME: the Sex logo
-#+ATTR_HTML: :width 300px
-[[sex.png][file:./sex.png]]
+Sex is also Chicken, since all source processing and compile-time
+computations are written in Chicken.
 
-Sex is a S-expressions language. Sex is written in Chicken, which is a
-[[https://call-cc.org][R5RS Scheme]].
-Sex is statically typed, compiled general purpose language.
+And Chicken is [[https://call-cc.org][R5RS Scheme]].
 
-* Compilation
-First, get yourself a Chicken, then, some Chicken deps. You also will
-need a C compiler.
+* Compilation and usage
+First, get yourself a Chicken. Second, some Chicken deps.
 
 ** Install Chicken Eggs
-Tip: there's a way to make Chicken install eggs non-globally. You need
-to export ~CHICKEN_INSTALL_REPOSITORY~ and ~CHICKEN_REPOSITORY_PATH~
-environment variables. Refer to the documentation for more info:
+By the way, there's a way to make Chicken install eggs non-globally. Refer to
+the documentation for more info:
 https://wiki.call-cc.org/man/5/Extension%20tools#changing-the-repository-location
 
-~chicken-install `cat dependencies.txt`~
+~chicken-install fmt getopt-long brev-separate~
 
 ** Compilation
 ~make~
 
-* Usage
-** Summary
+** Usage
+You'll also need a C compiler, so pick any.
 #+begin_src
-Usage: sexc [options] filename [-- options-for-c-compiler]
-Options:
- --c-compiler=ARG         Select C compiler. Defaults to value of SEX_CC
-                          environment variable, or if it is empty, to cc
- -c, --compile-object     Compile object file instead of executable program
- -C, --preprocess         Emit C code
- --public-interface       Get module's public interface
- -h, --help               Show this help
- -m, --macro-expand       Emit macro-expanded semantically processed Sex code
-                          (sort of IR). May be useful for debugging
- -o, --output=ARG         Write output to file. Default file name is a.out.
-                          If -E or -m options are provided, defaults to stdout
-#+end_src
-** Compiling Hello World
-#+begin_src shell
-sexc ./examples/hello-world.sex -o hello
+cat hello-world.sex | sexc > hello_world.c
+cc hello_world.c -o hello_world
 #+end_src
 
-That's it. Now you should have executable named ~hello~ in your
-directory. Sex uses C under the hood, the default C compiler is ~cc~,
-but you can pass any using ~--c-compiler~ option, or by setting
-~SEX_CC~ environment variable.
+* Example
+Here is an example, demonstrating what Sex source looks like, and what
+it compiles too. An avid reader also shall notice how we call Chicken
+procedures in Sex source.
 
-** Example
-An example of Sex source:
-#+begin_src scheme
+The Sex source:
+#+begin_src
 (include stdio.h)
 
-(pub fn main ((argc int) (argv  [* const char])) int
+(define (foo)
+  "Hello from Chicken code!\n")
+
+(pub fn int main ((int argc) (char **argv))
     (puts "Hello from Sex!")
-  (var name [char 512])
+    (var (array char 512) name)
     (puts "What is your name?")
-  (scanf "%s" (cast (& name) (* char)))
+    (scanf "%s" &name)
     (printf "Hello, %s!\n" name)
-  (return 0))
+    (printf ,(foo))
+    0)
 #+end_src
 
-Compile and run:
-#+begin_src shell
-~/dev/sex $ ./sexc ./example/hello-world.sex -o hello-world
-~/dev/sex $ ./hello-world
-Hello from Sex!
-What is your name?
-Alex
-Hello, Alex!
+The resulting C source:
+#+begin_src
+#include <stdio.h>
+
+int main (int argc, char **argv) {
+    puts("Hello from Sex!");
+    char name[512];
+    puts("What is your name?");
+    scanf("%s", &name);
+    printf("Hello, %s!\n", name);
+    printf("Hello from Chicken code!\n");
+    return 0;
+}
 #+end_src
 
 * Features
@@ -78,76 +68,16 @@ Hello, Alex!
 Just ~(include "Your/Favourite/Library.h")~ and use it as you would
 have is C.
 
-*** Auto kebabification
 For hardcore fans of traditional Lisp naming convention,
-Sex offers automatic kebabification of all symbols, i.e. no more
+Sex offers automatic unkebabification of all symbols, i.e. no more
 ugly ~GL_ARRAY_BUFFER~ s in your code, they may be written in their
 proper form: ~GL-ARRAY-BUFFER~.
 
-** Modules
-Each source file is a module. Module can provide public interface and
-be imported by using ~(import path/to/module)~ expression. Module
-search path consists of two parts: first is relative to the source
-being compiled location, and the second is ~SEX_MODULE_PATH~
-environment variable.
-
-Module's public interface consists of everything declared
-~pub~. Structures, function, macros, types, variables can be
-public.
-
-** Syntactic macros
-Sex has support for syntactic macros. Macro definitions look like
-functions: they have a name, an argument list and a body. Macro should
-return Sex code.
-
-*** Examples:
-**** Structure with templated value type
-#+begin_src scheme
-(pub defmacro (list-T type)
-  (let ((list-type (cat 'list- type)))
-    `(struct ,list-type
-       ((value ,type)
-        (next (* ,list-type))))))
-
-(list-T int)
-#+end_src
-->
-#+begin_src scheme
-(struct list_int
- ((value int)
-  (next (* list_int))))
-#+end_src
-
-**** Wrapper for checking return codes
-#+begin_src scheme
-(pub defmacro (check-sdl-return call message ret-code)
-  `(if (< 0 ,call)
-       (begin
-         (puts ,message)
-         (return ,ret-code))))
-
-(pub fn init () int
-  (check-sdl-return
-    (SDL-Init SDL-INIT-VIDEO) "Failed to initialize SDL" 1)
-...)
-#+end_src
-->
-#+begin_src scheme
-(pub fn init () int
-  (if (< 0 (SDL_Init SDL_INIT_VIDEO))
-    (begin (puts "Failed to initialize SDL") (return 1)))
-  ...)
-#+end_src
+** Auto typedef for structs
+Probably harmless idk.
 
 ** Use an established environment for development
 As Sex is S-expressions, you always have Emacs with paredit as your
 best option.
 
-*** sex-mode.el
-To harness the power of sex-mode, add the following lines to your
-~$HOME/.config/emacs/init.el~:
-#+begin_src emacs-lisp
-(use-package sex-mode
-  :load-path "/path/to/sex"
-  :mode ("\\.sex\\'"))
-#+end_src
+** COMING SOON: Polymorhpism

dependencies.txt

@@ -1 +0,0 @@
-fmt getopt-long brev-separate test tree srfi-1 srfi-13 srfi-69 matchable

example/fns.sex

@@ -1,10 +0,0 @@
-;;; Prototypes
-(fn puk () void)
-
-(pub fn plak () void)
-
-;;; Functions
-(fn foo () int (return 1))
-
-(pub fn bar ((a int) (b int)) void
-  (printf "%d\n" (+ a b)))

example/hello-world.sex

@@ -1,9 +0,0 @@
-(include stdio.h)
-
-(pub fn main ((argc int) (argv  [* const char])) int
-  (puts "Hello from Sex!")
-  (var name [char 512])
-  (puts "What is your name?")
-  (scanf "%s" (cast (& name) (* char)))
-  (printf "Hello, %s!\n" name)
-  (return 0))

example/lambdas.sex

@@ -1,51 +0,0 @@
-(include stdio.h)
-
-(fn sum ((a int) (b int)) int
-  (return (+ a b)))
-
-(pub fn main () int
-  (var a int 10)
-  (var b int 20)
-  (var (fn ((int) (int)) int) sum-fn sum)
-
-  (var (fn ((int) (int)) int) sum-lambda
-
-       (lambda ((a int) (b int)) int ()
-         (return (+ a b))))
-
-  (var (fn ((int)) int) sum-lambda-2
-
-       (lambda ((a int)) int ()
-         (return (+ a 20))))
-
-  (printf "Hello from main fn!\n")
-  (printf "We will now perform some function calling.\n")
-
-  (printf "Calling fn ptr: %d\n" (sum-fn a b))
-  (printf "Calling lambda: %d\n" (sum-lambda a b))
-  (printf "Calling other lambda: %d\n" (sum-lambda-2 a))
-  (printf "Calling lambda inplace: %d\n" ((lambda ((a int) (b int)) int ()
-                                            (return (+ a b 100)))
-                                          a b))
-
-  (var (fn ((int)) int) l-1
-       (lambda ((a int)) int ()
-         (var (fn ((int)) int) l-2
-              (lambda ((a int)) int ()
-                (return (+ 60 a))))
-         (return (+ 600 (l-2 a)))))
-  (printf "Calling nested lambdas: %d\n" (l-1 6))
-
-  ;; Not supported yet
-  ;; Closure
-  ;;  (var (fn (fn ((int)) int) ((int))) make-adder
-  ;;       (lambda (fn int ((int a))) ()
-  ;;         (return (lambda int ((int b)) (a)
-  ;;                   (return (+ a b))))))
-  ;;
-  ;;  (var (fn int ((int))) add-10
-  ;;       (make-adder 10))
-  ;;  (var (fn int ((int))) add-20
-  ;;       (make-adder 20))
-  ;;  (printf "Calling closures: %d\n" (add-10 24))
-  (return 0))

example/list.sex

@@ -1,48 +0,0 @@
-(pub defmacro (list-T type)
-  (let ((list-type (cat 'list- type)))
-    `(struct ,list-type
-       ((value ,type)
-        (next (* struct ,list-type))))))
-
-(pub defmacro (make-list-T type is-public?)
-  (let ((list-type (list 'struct (cat 'list- type)))
-        (fn-name (cat 'make-list- type)))
-    `(,@(if is-public? '(pub) '()) fn ,fn-name () (* ,list-type)
-      (var list (* ,list-type) (cast  (malloc (sizeof ,list-type)) (* ,list-type)))
-      (= (-> list next) NULL)
-      (return list))))
-
-(pub defmacro (add-value-list-T type is-public?)
-  (let ((list-type (list 'struct (cat 'list- type)))
-        (fn-name (cat 'add-value-list- type)))
-    `(,@(if is-public? '(pub) '()) fn ,fn-name ((list * ,list-type) (value ,type)) void
-      (while (!= (-> list next) NULL)
-        (= list (-> list next)))
-      (= (-> list next) (,(cat 'make-list- type)))
-      (= (-> list value) value))))
-
-(pub defmacro (length-list-T type is-public?)
-  (let ((fn-name (cat 'length-list- type))
-        (list-type (list 'struct (cat 'list- type))))
-    `(,@(if is-public? '(pub) '()) fn ,fn-name ((list ,(cons '* list-type))) size-t
-      (var n size-t 0)
-      (while (!= (-> list next) NULL)
-        (= list (-> list next))
-        (++ n))
-      (return n))))
-
-(pub defmacro (is-empty-list-T type is-public?)
-  `(,@(if is-public? '(pub) '()) fn ,(cat 'is-empty-list- type)
-    ((list ,(list '* 'struct (cat 'list- type))))
-    bool
-    (return (== (-> list next) NULL))))
-
-(pub defmacro (list-for-each list-type list-var elt-type elt-var what-do)
-  (let ((list-var-2 (cat list-var '-2)))
-    `(begin
-      (var ,list-var-2 (* ,list-type) ,list-var)
-      (var ,elt-var ,elt-type (-> ,list-var-2 value))
-      (while (!= (-> ,list-var-2 next) NULL)
-        ,what-do
-        (= ,list-var-2 (-> ,list-var-2 next))
-        (= ,elt-var (-> ,list-var-2 value))))))

example/test-list.sex

@@ -1,44 +0,0 @@
-(include stdlib.h)
-(include stddef.h)
-(include stdio.h)
-
-(import list)
-
-(struct foo
-  ((a-field float)
-   (b int)
-   (c (* const char))
-   (not (fn ((val bool)) bool))))
-
-(var f (struct foo))
-
-(list-T int)
-(make-list-T int #f)
-(add-value-list-T int #f)
-(length-list-T int #f)
-(is-empty-list-T int #f)
-
-(extern fn puk ((a int) (b float)) void)
-(pub fn baz () bool
-  (return true))
-
-(extern var i int)
-(var j int)
-(pub var k int)
-
-(pub fn main () int
-     (var l (* struct list-int) (make-list-int))
-     (printf "Size of the list: %lu\n" (length-list-int l))
-     (add-value-list-int l 3)
-     (add-value-list-int l 4)
-     (printf "Size of the list: %lu\n" (length-list-int l))
-     (list-for-each (struct list-int) l int v
-       (printf "%d " v))
-     (printf "\n")
-     (printf "Size of the list: %lu\n" (length-list-int l))
-     (printf "%p\n" (cast l->next (* void)))
-     (return 0))
-
-(pub fn print-list ((l (* const struct list-int))) void
-     (list-for-each (const struct list-int) l int v (printf "%d " v))
-     (printf "\n"))

fmt-c-writer.module.scm

@@ -1,3 +0,0 @@
-(module fmt-c-writer (emit-c
-                      sex-fmt-current-file)
-  "fmt-c-writer.scm")

fmt-c-writer.scm

@@ -1,283 +0,0 @@
-;;; Sex fmt-c output writer
-
-(import
-  scheme
-  (chicken base)
-  (chicken string)
-  (chicken syntax)
-  brev-separate
-  fmt
-  sex-fmt-c
-  matchable
-  regex
-  srfi-1                                ; lists
-  srfi-13                               ; strings
-  srfi-39                               ; parameters
-  tree
-  utils)
-
-(define (unkebabify sym)
-  (case sym
-    ((-) sym)
-    ((--) sym)
-    ((->) sym)
-    ((-=) sym)
-    (else
-     (string->symbol
-      (string-substitute "-(?!>)" "_"
-                         (symbol->string sym) #t)))))
-
-(define (atom-to-fmt-c atom)
-  (case atom
-    ((fn) '%fun)
-    ((prototype) '%prototype)
-    ((begin) '%block-begin)
-    ((define) '%define)
-    ((pointer) '%pointer)
-    ((array) '%array)
-    ((attribute) '%attribute)
-    ((¤) 'vector-ref)
-    ((include) '%include)
-    ;; uh things we do for c89 compatibility
-    ((bool) 'int)
-    ((true) 1)
-    ((false) 0)
-    (else
-     (if (symbol? atom)
-         (unkebabify atom)
-         atom))))
-
-(define (maybe-unwrap-type type)
-  (if (and (list? type)
-           (= 1 (length type)))
-      (car type)
-      type))
-
-(define (make-field-access form)
-  (assert
-   (= 2 (length form)) "Wrong field access format")
-  (unkebabify
-   (string->symbol
-    (fmt #f (cadr form) (car form)))))
-
-(define (walk-generic-toplevel form)
-  (cond ((atom? form) (atom-to-fmt-c form))
-        ((list? form) (map walk-generic-toplevel form))
-        (else (error "Malformed form " form))))
-
-(define (field-access-form? form)
-  (and (symbol? (car form))
-       (char=? #\. (string-ref (symbol->string (car form)) 0))))
-
-(define (walk-expr form)
-  (match form
-    ((? vector?)
-     (list->vector
-      (walk-expr (vector->list form))))
-    ((? atom?)
-     (atom-to-fmt-c form))
-    ((? field-access-form?)
-     (make-field-access form))
-    (('var . _) (walk-var form))
-    (('cast expr type) (list '%cast
-                             (walk-type type)
-                             (walk-expr expr)))
-    (('enum . _) (walk-enum form))
-    ;; | is problematic... And c-or/bit-or/etc are actually
-    ;; procedures, so we have to call the procedure itself
-    (('c-or . rest) (apply c-or (map walk-expr rest)))
-    (('c-bit-or . rest) (apply c-bit-or (map walk-expr rest)))
-    (('c-bit-or= . rest) (apply c-bit-or= (map walk-expr rest)))
-    (else (map walk-expr form))))
-
-(define (walk-var form)
-  ;; (var a int) -> (%var int a)
-  ;; (var a (const int) 32) -> (%var (const int) a 32)
-  ;; (var b [const char 512]) -> (%var (%array (const char) 512) b)
-  ;; note: [...] is actually (¤ ...) after reading
-  ;; (var c (fn ((int) (float)) void)) -> (%var (%fun void ((int) (float))) c)
-  `(%var
-    ,(walk-type (third form))
-    ,(atom-to-fmt-c (second form))
-    .
-    ,(if (null? (drop form 3))
-         (list)
-         (walk-expr (drop form 3)))      ; optional init expression
-    ))
-
-(define (walk-type form)
-  ;; int -> int
-  ;; (const int) -> const int
-  ;; [const char 512] ->(¤ (const char) 512) -> (%array (const char) 512)
-  ;; [float 8] -> (%array float 8)
-  ;; (* const char) -> (const char *)
-  ;; (const * const * const char) -> (const char * const * const)
-  ;; (fn ((int) (float)) void) -> (%fun void ((int) (float)))
-  (match form
-    (('¤ . array-type)
-     (if (integer? (last array-type))
-         ;; sized array
-         (let* ((type-list (drop-right array-type 1))
-                (type (maybe-unwrap-type type-list))
-                (size (last array-type)))
-           `(%array ,(walk-type type)
-                    ,size))
-         ;; sugar for pointer... Do we really need it? Guess why not,
-         ;; it's a strong semantic cue
-         `(%array ,(walk-type (maybe-unwrap-type array-type)))))
-    (('fn arglist ret-type)
-     `(%fun ,(walk-type ret-type) ,(walk-arglist arglist)))
-    (('fn . _)
-     (assert #f "Malformed function type form"))
-
-    ;; Special case: nested structs/unions
-    ((or ('struct . _)
-         ('union . _)) (walk-struct form))
-
-    (('enum . _) (walk-enum form))
-    (else
-     (type-convert-to-c form))))
-
-(define (type-convert-to-c type)
-  ;; Our pointers to C pointers
-  ;; int -> int
-  ;; * const char -> const char *
-  ;; const * const char -> const char * const
-  (if (atom? type) (atom-to-fmt-c type)
-      (flatten
-       (tree-map atom-to-fmt-c
-                 (flatten
-                  (list-join (reverse (list-split type '*))
-                             '(*)))))))
-
-(define (walk-fn-def form)
-  (match form
-    (('fn name args ret-type . maybe-body)
-     `(%fun
-       ,(walk-type ret-type)
-       ,(atom-to-fmt-c name)
-       ,(walk-arglist args)
-       .
-       ,(walk-expr maybe-body)))))
-
-;;; TODO: isn't there a better way?
-(define (is-probably-type form)
-  (case (car form)
-    ((¤ * const volatile struct union) #t)
-    (else #f)))
-
-(define (walk-arglist form)
-  ;; E.g.:
-  ;; ((float) (int) (const char) (* const char) (¤ (* const struct res) 32))
-  ;; ((f1 float) (f2 float) (f3 float) (res (¤ float 4)))
-  (map (fn
-        (match x
-          (('¤ . _) (walk-type x))
-
-          ;; yeah shitty, but I don't know yet how to determine if the
-          ;; first entry is part of the type and not an argument name
-          ;; :(
-          ((? is-probably-type) (walk-type x))
-
-          ;; 1 element args are always type
-          ((_) (walk-type x))
-
-          ((var . type) (append (list (walk-type (maybe-unwrap-type type)))
-                                (list (walk-type var))))))
-       form))
-
-(define (walk-function form)
-  ;; (fn ret-type name arglist body) -> normal function
-  ;; (fn ret-type name arglist) -> prototype
-  (if (>= (length form) 5)
-      (walk-fn-def form)
-      (cons '%prototype (cdr (walk-fn-def form)))))
-
-(define (process-struct-fields fields)
-  (map (fn
-        (let ((type (walk-type (last x))))
-          (cons type (map atom-to-fmt-c (drop-right x 1)))))
-       fields))
-
-(define (walk-struct form)
-  (match form
-    ((type (fields ...) . attrs)        ; anonymous struct
-     `(,type ,(process-struct-fields fields)
-             . ,(tree-map atom-to-fmt-c attrs)))
-    ((type name)                        ; simple 'struct whatever', like in variable def
-     `(,type ,(atom-to-fmt-c name)))
-    ((type name (fields ...) . attrs)
-     `(,type ,(atom-to-fmt-c name)
-             ,(process-struct-fields fields)
-             . ,(tree-map atom-to-fmt-c attrs)))
-    (else (error "Malformed aggregate definition " form))))
-
-(define (walk-enum form)
-  (match form
-    (('enum (values ...))
-     `(enum ,(map atom-to-fmt-c values)))
-    (('enum name (values ...))
-     `(enum ,(atom-to-fmt-c name) ,(map atom-to-fmt-c values)))))
-
-(define (walk-extern form)
-  (match form
-    (('fn . _)
-     ;; extern function?.. What
-     (list 'extern (walk-function form)))
-    (('var . _)
-     (list 'extern (walk-var form)))
-    (else (error "Extern what?"))))
-
-(define (walk-public form)
-  (match form
-    (('fn . _)
-     (walk-function form))
-    (('var . _)
-     (walk-var form))
-    ((or ('define . _)
-         ('defmacro . _)
-
-         ('import . _)
-         ('include . _)
-
-         ('struct . _)
-         ('union . _)
-
-         ('typedef . _))
-     ;; ignore here, used in generating public interface
-     (process-toplevel-form form))
-    (else
-     (error "Pub what?" (cadr form)))))
-
-(define (process-toplevel-form form)
-  (match form
-    (('fn . _) (list 'static (walk-function form)))
-    (('var . _) (list 'static (walk-var form)))
-    (('extern . rest) (walk-extern rest))
-    (('pub . rest) (walk-public rest))
-    ((or ('struct . _)
-         ('union . _)) (walk-struct form))
-    (('enum . _) (walk-enum form))
-    (('define name . rest) `(%define ,(atom-to-fmt-c name) ,@rest))
-    (else (walk-expr form))))
-
-(define (get-line-num form)
-  (let ((num (get-line-number form)))
-    (if (string? num)
-        (last (string-split num ":"))
-        #f)))
-
-(define sex-fmt-current-file (make-parameter "/dev/null"))
-(define sex-fmt-line-num (make-parameter 0))
-
-(define (line-directive-string)
-  (fmt #f #\# "line " (sex-fmt-line-num) " " #\" (sex-fmt-current-file) #\"))
-
-(define (emit-c sex-forms)
-  (for-each (lambda (form)
-              (let ((start-line (get-line-num form)))
-                (when start-line
-                  (sex-fmt-line-num start-line)
-                  (fmt #t (line-directive-string) nl)))
-              (fmt #t (c-expr (process-toplevel-form form)) nl))
-            sex-forms))

hello-world.sex

@@ -0,0 +1,18 @@
+(include stdio.h)
+
+(define (foo)
+  "Hello from Chicken code!\n")
+
+(struct foo
+  ((int a)
+   (float b)))
+
+(pub fn int main ((int argc) (char **argv))
+    (var int a 10)
+    (puts "Hello from Sex!")
+    (var (array char 512) name)
+    (puts "What is your name?")
+    (scanf "%s" &name)
+    (printf "Hello, %s!\n" name)
+    (printf ,(foo))
+    0)

lib/list.hsex

@@ -0,0 +1,36 @@
+(template (list-T (T))
+  (struct list-T
+    ((T value)
+     ((* list-T) next))))
+
+(template (make-list-T (T) is-public?)
+  (,@(if is-public? '(pub) '()) fn (* list-T) make-list-T ()
+   (var (* list-T) list (cast (* list-T) (malloc (sizeof list-T))))
+    (= (-> list next) NULL)
+    list))
+
+(template (add-value-list-T (T) is-public?)
+  (,@(if is-public? '(pub) '()) fn void add-value-list-T ((list-T *list) (T value))
+       (while (!= (-> list next) NULL)
+         (= list (-> list next)))
+       (= (-> list next) (make-list-T))
+       (= (-> list value) value)))
+
+(template (length-list-T (T) is-public?)
+  (,@(if is-public? '(pub) '()) fn size-t length-list-T ((list-T *list))
+   (var size-t n 0)
+   (while (!= (-> list next) NULL)
+     (= list (-> list next))
+     (++ n))
+   n))
+
+(template (is-empty-list-T (T) is-public?)
+  (,@(if is-public? '(pub) '()) fn bool is-empty-list-T ((list-T *list))
+    (== (-> list next) NULL)))
+
+(template (list-for-each (what-do list-var elt-var))
+  (var int elt-var (-> list-var value))
+  (while (!= (-> list-var next) NULL)
+    what-do
+    (= list-var (-> list-var next))
+    (= elt-var (-> list-var value))))

lib/test-list.sex

@@ -0,0 +1,28 @@
+(include stdlib.h)
+(include stddef.h)
+(include stdbool.h)
+(include stdio.h)
+
+(load "list.hsex")
+
+(struct foo
+  ((float a)
+   (int b)))
+
+,(list-T '(int))
+,(make-list-T '(int) #f)
+,(add-value-list-T '(int) #f)
+,(length-list-T '(int) #f)
+,(is-empty-list-T '(int) #f)
+
+(fn bool bar () false)
+
+(pub fn int main ()
+     (var (* list-int) l (make-list-int))
+     (printf "Size of the list: %zu\n" (length-list-int l))
+     (add-value-list-int l 3)
+     (add-value-list-int l 4)
+     (printf "Size of the list: %zu\n" (length-list-int l))
+     ,(list-for-each '((printf "%d " v) l v))
+     (printf "\n")
+     0)

main.scm

@@ -1,5 +1,6 @@
 ;;; The purpose of this file is to compile it to the only
 ;;; .o that has main entry point.
 
-(import sexc)
+(declare (uses sexc))
+
 (main)

reader.module.scm

@@ -1,3 +0,0 @@
-(module reader (read-from-file
-                read-raw-forms)
-  "reader.scm")

reader.scm

@@ -1,62 +0,0 @@
-(import
-  scheme
-  (chicken base)
-  (chicken io)
-  (chicken pathname)
-  (chicken port)
-  (chicken read-syntax)
-  (chicken string)
-  (chicken syntax)
-  brev-separate
-  fmt)
-
-(import-syntax utils)
-
-(define (read-forms acc)
-  (let ((r (read-with-source-info (current-input-port))))
-    (if (eof-object? r) (reverse acc)
-        (read-forms (cons r acc)))))
-
-(define (read-from-file file)
-  (with-directory file
-                  (with-input-from-file (pathname-strip-directory file)
-                    (fn (read-forms (list))))))
-
-(define (read-bracket port)
-  (let loop ((c (read-char port))
-             (str (string)))
-    (cond ((char=? c #\])
-           (cons '¤
-                 (with-input-from-string str
-                   (fn (port-map identity read)))))
-          ((char=? c #\[)
-           (loop port (conc )))
-          (else
-           (loop (read-char port)
-                 (conc str c))))))
-
-(define open-bracket-counter (make-parameter 0))
-
-(define (read-raw-forms input-source)
-  (let ((bracket-end (gensym)))
-    (set-read-syntax!
-     #\]
-     (lambda (port)
-       (when (= 0 (open-bracket-counter))
-         (error "Unmatched closing bracket"))
-       (open-bracket-counter (- (open-bracket-counter) 1))
-       bracket-end))
-
-    (set-read-syntax!
-     #\[
-     (lambda (port)
-       (open-bracket-counter (+ (open-bracket-counter) 1))
-       (let loop ((r (read port))
-                  (acc (list)))
-         (if (eq? r bracket-end)
-             (cons '¤ (reverse acc))
-             (loop (read port)
-                   (cons r acc)))))))
-  (if (eq? input-source 'stdin)
-      (read-forms (list))
-      (read-from-file input-source)))

semen.module.scm

@@ -1,2 +0,0 @@
-(module semen ()
-  "semen.scm")

semen.scm

@@ -1,239 +0,0 @@
-;;; Sex semantic engine
-
-(import
-  scheme
-  (chicken base)
-  (chicken keyword)
-  (chicken string)
-  (chicken module)
-  fmt
-  sex-macros
-  sex-modules
-  matchable                         ; pattern matching
-  srfi-1                            ; list routines
-  srfi-69                           ; hash tables
-  utils
-  )
-
-(export/rename (process semen-process))
-
-;;; for lambda extraction, docstring processing, macro expansion,
-;;; injection of module headers, i.e. all things that rearrange code
-;;; structurally, add or remove forms
-;;;
-;;; The algorithm: feed toplevel forms to appropriate handlers, then
-;;; append their return to the resulting list. Each handler can return
-;;; multiple forms, e.g. lambdas collected from a function may result
-;;; in auxiliary structures and functions.
-(define (process raw-sex-forms)
-  (process-rec raw-sex-forms (list)))
-
-(define (process-rec forms acc)
-  (cond
-   ((null? forms) (reverse acc))
-   ((macro? (car forms))
-    (process-rec
-     (macroexpand (car forms) (cdr forms))
-     acc))
-   (else
-    (process-rec (cdr forms)
-                 (match-sex-form (car forms) acc)))))
-
-(define (macroexpand macro-form rest-forms)
-  ;; We want to replace macro with its expansion. The problem is,
-  ;; top-level macro can return either a single form, or a list of
-  ;; forms, when it for example generates some aux
-  ;; structures/functions/typedefs.
-  ;;
-  ;; Single form we just cons to the top of rest-forms, but multiple
-  ;; forms have to be appended to the rest-forms.
-  (let ((res (apply-macro macro-form)))
-    (if (list? (car res))
-        (append res rest-forms)
-        (cons res rest-forms))))
-
-(define (match-sex-form sex-form acc)
-  (match sex-form
-    ((or ('fn . _)
-         ('pub 'fn . _)
-         ('extern 'fn . _)) (process-fn sex-form acc))
-    ((or ('struct . _)
-         ('pub 'struct . _)) (process-struct sex-form acc))
-    ((or ('union . _)
-         ('pub 'union . _)) (process-struct sex-form acc))
-    ((or ('enum . _)
-         ('pub 'enum . _)) (process-struct sex-form acc))
-    ((or ('var . _)
-         ('pub 'var . _)
-         ('extern 'var . _)) (process-global-var sex-form acc))
-    (('include _) (cons sex-form acc))
-    (('define . _) (cons sex-form acc))
-
-    (('import . modules)
-     (process-imports (get-modules-public-forms modules) acc))
-
-    ((or ('defmacro . rest)
-         ('pub 'defmacro . rest)) (defmacro rest) acc)
-
-    ((or ('typedef new-type target)
-         ('pub 'typedef new-type target))
-     (process-typedef new-type target acc))
-
-    (else (assert #f (fmt #f "Unknown top level form " sex-form)))))
-
-(define (process-imports module-public-forms acc)
-  ;; Recursively process imports: register public macros, cons all
-  ;; other public things to our acc
-  (if (null? module-public-forms) acc
-      (match (car module-public-forms)
-        (('defmacro . rest)
-         (defmacro rest)
-         (process-imports (cdr module-public-forms) acc))
-        (else
-         (process-imports (cdr module-public-forms)
-                          (cons (car module-public-forms)
-                                acc))))))
-
-(define (macro-expand form)
-  "Walk the form recursively and expand all macros, until none is left."
-  (walk-form
-   form
-   (lambda (subform env)
-     (if (macro? subform)
-         (cons walk-embed-result (macroexpand subform (list)))
-         subform))
-   #f))
-
-;;; walk-form and friends: form walker with various abilities.
-;;; By default, replaces walked form with walk-fn result But may
-;;; perform additional operations depending of what the walk function
-;;; has requested.
-
-;;; For inspiration, see SBCL's walk.lisp and their template
-;;; system.
-
-(define walk-embed-result (gensym)
-  ;; For cases when result is a list which must be embedded in the
-  ;; form, e.g. when it returned from a macro
-  )
-
-(define (walk-form form walk-fn env)
-  (if (atom? form) form
-      (let ((new-form (walk-fn form env)))
-        (cond ((not (eq? form new-form))
-               (walk-form new-form walk-fn env))
-              (else
-               (let ((new-car (walk-form (car new-form) walk-fn env))
-                     (new-cdr (walk-form (cdr new-form) walk-fn env)))
-                 (cond ((and (pair? new-car)
-                             (eq? (car new-car) walk-embed-result))
-                        (append (cdr new-car) new-cdr))
-                       (else
-                        (recons new-form new-car new-cdr)))))))))
-
-;;; Typdef
-
-(define (process-typedef new-type target acc)
-  (cons `(typedef ,target ,new-type) acc))
-
-;;; Fn processing
-
-(define (process-fn sex-fn acc)
-  (let* ((expanded (macro-expand sex-fn))
-         (env (make-hash-table))
-         (processed
-          (walk-form
-           expanded
-           fn-walker
-           (begin
-             (set! (hash-table-ref env :fn-name) (sex-fn-name expanded))
-             (set! (hash-table-ref env :lambda-counter) 0)
-             (set! (hash-table-ref env :lambda-aux-code) (list))
-             env))))
-
-    (cons processed
-          (append (hash-table-ref env :lambda-aux-code) acc))))
-
-(define (fn-walker form env)
-  (if (eq? 'lambda (car form))
-      (let ((lambda-name (make-lambda-name (hash-table-ref env :fn-name)
-                                           (hash-table-ref env :lambda-counter))))
-        (set! (hash-table-ref env :lambda-aux-code)
-          (append (make-aux-lambda-struct lambda-name form)
-                  (hash-table-ref env :lambda-aux-code)))
-        (set! (hash-table-ref env :lambda-counter)
-          (+ (hash-table-ref env :lambda-counter) 1))
-        lambda-name)
-      form))
-
-(define (make-lambda-name enclosing-fn-name counter)
-  (string->symbol
-   (fmt #f "__lambda_" counter "_" enclosing-fn-name)))
-
-(define (make-aux-lambda-struct name form)
-  (match form
-    (('lambda ret-type arglist captures . body)
-     ;; Captures are ignored for now, but
-     ;; we'll need them for TODO: closures support
-     (process-fn `(fn ,ret-type ,name ,arglist ,@body) (list)))
-    (else (assert #f (fmt #f "Malformed lambda " form)))))
-
-;;; Structs
-
-(define (process-struct sex-struct acc)
-  (cons sex-struct acc))
-
-(define (process-global-var sex-var acc)
-  (cons sex-var acc))
-
-;;; Utils
-(define (non-empty-list? form)
-  (and (list? form)
-       (not (null? form))))
-
-(define (sex-fn? form)
-  "The `form` must be toplevel.
-Returns #f if the form is not a function, returns the form otherwise"
-  (match form
-    ((fn . _) form)
-    ((pub fn . _) form)
-    (else #f)))
-
-(define (sex-fn-public? fn-form)
-  (eq? (car fn-form) 'pub))
-
-(define (sex-fn-return-type fn-form)
-  (assert (sex-fn? fn-form)
-          (fmt #f "Form " fn-form " is not a function"))
-  (if (sex-fn-public? fn-form)
-      (third fn-form)
-      (second fn-form)))
-
-(define (sex-fn-name fn-form)
-  (assert (sex-fn? fn-form)
-          (fmt #f "Form " fn-form " is not a function"))
-  (if (sex-fn-public? fn-form)
-      (fourth fn-form)
-      (third fn-form)))
-
-(define (sex-fn-arglist fn-form)
-  (assert (sex-fn? fn-form)
-          (fmt #f "Form " fn-form " is not a function"))
-  (if (sex-fn-public? fn-form)
-      (fifth fn-form)
-      (fourth fn-form)))
-
-(define (sex-fn-prototype fn-form)
-  "Returns all except body"
-  (assert (sex-fn? fn-form)
-          (fmt #f "Form " fn-form " is not a function"))
-  (if (sex-fn-public? fn-form)
-      (take fn-form 5)
-      (take fn-form 4)))
-
-(define (sex-fn-body fn-form)
-  (assert (sex-fn? fn-form)
-          (fmt #f "Form " fn-form " is not a function"))
-  (if (sex-fn-public? fn-form)
-      (drop fn-form 5)
-      (drop fn-form 4)))

sex-fmt-c.scm

@@ -1,985 +0,0 @@
-;;;; fmt-c.scm -- fmt module for emitting/pretty-printing C code
-;;
-;; Copyright (c) 2007 Alex Shinn.  All rights reserved.
-;; BSD-style license: http://synthcode.com/license.txt
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;; additional state information
-
-(module sex-fmt-c
-    (
-     fmt-in-macro? fmt-expression? fmt-return?
-     fmt-newline-before-brace? fmt-braceless-bodies?
-     fmt-indent-space fmt-switch-indent-space fmt-op fmt-gen
-     c-in-expr c-in-stmt c-in-test
-     c-paren c-maybe-paren c-type c-literal? c-literal char->c-char
-     c-struct c-union c-class c-enum c-typedef c-cast
-     c-expr c-expr/sexp c-apply c-op c-indent c-current-indent-string
-     c-wrap-stmt c-open-brace c-close-brace
-     c-block c-braced-block c-begin
-     c-fun c-var c-prototype c-param c-param-list
-     c-while c-for c-if c-switch
-     c-case c-case/fallthrough c-default
-     c-break c-continue c-return c-goto c-label
-     c-static c-const c-extern c-volatile c-auto c-restrict c-inline
-     c++ c-- c+ c- c* c/ c% c& c^ c~ c! c&& c<< c>> c== c!= ;  |c\||  |c\|\||
-     c< c> c<= c>= c= c+= c-= c*= c/= c%= c&= c^= c<<= c>>= ;++c --c ;  |c\|=|
-     c++/post c--/post c. c->
-     c-bit-or c-or c-bit-or=
-     cpp-if cpp-ifdef cpp-ifndef cpp-elif cpp-endif cpp-else cpp-undef
-     cpp-include cpp-define cpp-wrap-header cpp-pragma cpp-line
-     cpp-error cpp-warning cpp-stringify cpp-sym-cat
-     c-comment c-block-comment c-attribute)
-
-  (import
-    scheme
-    (chicken base)
-    fmt
-    srfi-1
-    srfi-13)
-
-  (define (fmt-in-macro? st) (fmt-ref st 'in-macro?))
-  (define (fmt-macro-params st) (fmt-ref st 'macro-params))
-  (define (fmt-expression? st) (fmt-ref st 'expression?))
-  (define (fmt-return? st) (fmt-ref st 'return?))
-  (define (fmt-newline-before-brace? st) (fmt-ref st 'newline-before-brace?))
-  (define (fmt-braceless-bodies? st) (fmt-ref st 'braceless-bodies?))
-  (define (fmt-non-spaced-ops? st) (fmt-ref st 'non-spaced-ops?))
-  (define (fmt-no-wrap? st) (fmt-ref st 'no-wrap?))
-  (define (fmt-indent-space st) (fmt-ref st 'indent-space))
-  (define (fmt-switch-indent-space st) (fmt-ref st 'switch-indent-space))
-  (define (fmt-op st) (fmt-ref st 'op 'stmt))
-  (define (fmt-gen st) (fmt-ref st 'gen))
-
-  (define (c-in-expr proc) (fmt-let 'expression? #t proc))
-  (define (c-in-stmt proc) (fmt-let 'expression? #f proc))
-  (define (c-reset-newline proc) (fmt-let 'newline-before-brace? #f proc))
-
-  (define (c-in-test proc) (fmt-let 'in-cond? #t (c-in-expr proc)))
-  (define (c-with-op op proc) (fmt-let 'op op proc))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; be smart about operator precedence
-
-  (define (c-op-precedence x)
-    (if (string? x)
-        (cond
-         ((or (string=? x ".") (string=? x "->")) 10)
-         ((or (string=? x "++") (string=? x "--")) 20)
-         ((string=? x "&") 55)
-         ((string=? x "|") 65)
-         ((string=? x "&&") 70)
-         ((string=? x "||") 75)
-         ((string=? x "|=") 85)
-         ((or (string=? x "+=") (string=? x "-=")) 85)
-         (else 95))
-        (case x
-          ;;((|::|) 5) ; C++
-          ((dot arrow post-decrement post-increment) 10)
-          ((**) 15)                                            ; Perl
-          ((unary+ unary- ! ~ cast unary-* unary-& sizeof) 20) ; ++ --
-          ((=~ !~) 25)                                         ; Perl
-          ((* / %) 30)
-          ((+ -) 35)
-          ((<< >>) 40)
-          ((< > <= >=) 45)
-          ((lt gt le ge) 45)            ; Perl
-          ((== !=) 50)
-          ((eq ne cmp) 50)              ; Perl
-          ((&) 55)
-          ((^) 60)
-          ;;((|\||) 65)
-          ((&& %and) 70)
-          ((%or) 75)
-          ;;((|\|\||) 75)
-          ;;((.. ...) 77)                   ; Perl
-          ((?) 80)
-          ((= *= /= %= &= ^= <<= >>=) 85) ; |\|=| ;  += -=
-          ((comma) 90)
-          ((=>) 90)                     ; Perl
-          ((not) 92)                    ; Perl
-          ((and) 93)                    ; Perl
-          ((or xor) 94)                 ; Perl
-          ((paren bracket) 100)
-          (else 95))))
-
-  (define (c-op< x y) (< (c-op-precedence x) (c-op-precedence y)))
-  (define (c-op<= x y) (<= (c-op-precedence x) (c-op-precedence y)))
-
-  (define (c-paren x) (cat "(" (c-expr x) ")"))
-
-  (define (c-maybe-paren op x)
-    (lambda (st)
-      ((fmt-let 'op op
-                (if (and (c-op<= (fmt-op st) op)
-                         (not (vector? x)))
-                    (c-paren x)
-                    x))
-       st)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; default literals writer
-
-  (define (c-control-operator? x)
-    (memq x '(if while switch repeat do for fun begin)))
-
-  (define (c-literal? x)
-    (or (number? x) (string? x) (char? x) (boolean? x)))
-
-  (define (char->c-char c)
-    (string-append "'" (c-escape-char c #\') "'"))
-
-  (define (c-escape-char c quote-char)
-    (let ((n (char->integer c)))
-      (if (<= 32 n 126)
-          (if (or (eqv? c quote-char) (eqv? c #\\))
-              (string #\\ c)
-              (string c))
-          (case n
-            ((7) "\\a") ((8) "\\b") ((9) "\\t") ((10) "\\n")
-            ((11) "\\v") ((12) "\\f") ((13) "\\r")
-            (else (string-append "\\x" (number->string (char->integer c) 16)))))))
-
-  (define (c-format-number x)
-    (if (and (integer? x) (exact? x))
-        (lambda (st)
-          ((case (fmt-radix st)
-             ((16) (cat "0x" (string-upcase (number->string x 16))))
-             ((8) (cat "0" (number->string x 8)))
-             (else (dsp (number->string x))))
-           st))
-        (dsp (number->string x))))
-
-  (define (c-format-string x)
-    (lambda (st) ((cat #\" (apply-cat (c-string-escaped x)) #\") st)))
-
-  (define (c-string-escaped x)
-    (let loop ((parts '()) (idx (string-length x)))
-      (cond ((string-index-right x c-needs-string-escape? 0 idx)
-             => (lambda (special-idx)
-                  (loop (cons (c-escape-char (string-ref x special-idx) #\")
-                              (cons (substring/shared x (+ special-idx 1) idx)
-                                    parts))
-                        special-idx)))
-            (else
-             (cons (substring/shared x 0 idx) parts)))))
-
-  (define (c-needs-string-escape? c)
-    (if (<= 32 (char->integer c) 127) (memv c '(#\" #\\)) #t))
-
-  (define (c-simple-literal x)
-    (c-wrap-stmt
-     (cond ((char? x) (dsp (char->c-char x)))
-           ((boolean? x) (dsp (if x "1" "0")))
-           ((number? x) (c-format-number x))
-           ((string? x) (c-format-string x))
-           ((null? x) (dsp "NULL"))
-           ((eof-object? x) (dsp "EOF"))
-           (else (dsp (write-to-string x))))))
-
-  (define (c-literal x)
-    (lambda (st)
-      ((if (and (symbol? x) (memq x (or (fmt-macro-params st) '())))
-           (c-paren (c-simple-literal x))
-           (c-simple-literal x))
-       st)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; default expression generator
-
-  (define (c-expr/sexp x)
-    (if (procedure? x)
-        x
-        (lambda (st)
-          (cond
-           ((pair? x)
-            (case (car x)
-              ((if) ((apply c-if (cdr x)) st))
-              ((for) ((apply c-for (cdr x)) st))
-              ((while) ((apply c-while (cdr x)) st))
-              ((switch) ((apply c-switch (cdr x)) st))
-              ((case) ((apply c-case (cdr x)) st))
-              ((case/fallthrough) ((apply c-case/fallthrough (cdr x)) st))
-              ((default) ((apply c-default (cdr x)) st))
-              ((break) (c-break st))
-              ((continue) (c-continue st))
-              ((return) ((apply c-return (cdr x)) st))
-              ((goto) ((apply c-goto (cdr x)) st))
-              ((typedef) ((apply c-typedef (cdr x)) st))
-              ((struct union class) ((apply c-struct/aux x) st))
-              ((enum) ((apply c-enum (cdr x)) st))
-              ((inline auto restrict register volatile extern static)
-               ((cat (car x) " " (apply c-begin (cdr x))) st))
-              ;; non C-keywords must have some character invalid in a C
-              ;; identifier to avoid conflicts - by default we prefix %
-              ((vector-ref)
-               ((c-wrap-stmt
-                 (cat (c-expr (cadr x)) "[" (c-expr (caddr x)) "]"))
-                st))
-              ((vector-set!)
-               ((c= (c-in-expr
-                     (cat (c-expr (cadr x)) "[" (c-expr (caddr x)) "]"))
-                    (c-expr (cadddr x)))
-                st))
-              ((extern/C) ((apply c-extern/C (cdr x)) st))
-              ((%apply) ((apply c-apply (cdr x)) st))
-              ((%define) ((apply cpp-define (cdr x)) st))
-              ((%include) ((apply cpp-include (cdr x)) st))
-              ((%fun) ((apply c-fun (cdr x)) st))
-              ((%cond)
-               (let lp ((ls (cdr x)) (res '()))
-                 (if (null? ls)
-                     ((apply c-if (reverse res)) st)
-                     (lp (cdr ls)
-                         (cons (if (pair? (cddar ls))
-                                   (apply c-begin (cdar ls))
-                                   (cadar ls))
-                               (cons (caar ls) res))))))
-              ((%prototype) ((apply c-prototype (cdr x)) st))
-              ((%var) ((apply c-var (cdr x)) st))
-              ((%begin) ((apply c-begin (cdr x)) st))
-              ((%attribute) ((apply c-attribute (cdr x)) st))
-              ((%line) ((apply cpp-line (cdr x)) st))
-              ((%pragma %error %warning)
-               ((apply cpp-generic (substring/shared (symbol->string (car x)) 1)
-                       (cdr x)) st))
-              ((%if %ifdef %ifndef %elif)
-               ((apply cpp-if/aux (substring/shared (symbol->string (car x)) 1)
-                       (cdr x)) st))
-              ((%endif) ((apply cpp-endif (cdr x)) st))
-              ((%block-begin) ((apply c-braced-block #f (cdr x)) st))
-              ((%block) ((apply c-braced-block (cdr x)) st))
-              ((%comment) ((apply c-comment (cdr x)) st))
-              ((:) ((apply c-label (cdr x)) st))
-              ((%cast) ((apply c-cast (cdr x)) st))
-              ((+ - & * / % ! ~ ^ && < > <= >= == != << >>
-                  = *= /= %= &= ^= >>= <<=) ; |\|| |\|\|| |\|=|
-               ((apply c-op x) st))
-              ((bitwise-and bit-and) ((apply c-op '& (cdr x)) st))
-              ((bitwise-ior bit-or) ((apply c-op "|" (cdr x)) st))
-              ((bitwise-xor bit-xor) ((apply c-op '^ (cdr x)) st))
-              ((bitwise-not bit-not) ((apply c-op '~ (cdr x)) st))
-              ((arithmetic-shift) ((apply c-op '<< (cdr x)) st))
-              ((bitwise-ior= bit-or=) ((apply c-op "|=" (cdr x)) st))
-              ((%and) ((apply c-op "&&" (cdr x)) st))
-              ((%or) ((apply c-op "||" (cdr x)) st))
-              ((%. %field) ((apply c-op "." (cdr x)) st))
-              ((%->) ((apply c-op "->" (cdr x)) st))
-              (else
-               (cond
-                ((eq? (car x) (string->symbol "."))
-                 ((apply c-op "." (cdr x)) st))
-                ((eq? (car x) (string->symbol "->"))
-                 ((apply c-op "->" (cdr x)) st))
-                ((eq? (car x) (string->symbol "++"))
-                 ((apply c-op "++" (cdr x)) st))
-                ((eq? (car x) (string->symbol "--"))
-                 ((apply c-op "--" (cdr x)) st))
-                ((eq? (car x) (string->symbol "+="))
-                 ((apply c-op "+=" (cdr x)) st))
-                ((eq? (car x) (string->symbol "-="))
-                 ((apply c-op "-=" (cdr x)) st))
-                (else ((c-apply x) st))))))
-           ((vector? x)
-            ((c-wrap-stmt
-              (fmt-try-fit
-               (fmt-let 'no-wrap? #t
-                        (cat "{" (fmt-join c-expr (vector->list x) ", ") "}"))
-               (lambda (st)
-                 (let* ((col (fmt-col st))
-                        (sep (string-append "," (make-nl-space col))))
-                   ((cat "{" (fmt-join c-expr (vector->list x) sep)
-                         "}" nl)
-                    st)))))
-             st))
-           (else
-            ((c-literal x) st))))))
-
-  (define (c-apply ls)
-    (c-wrap-stmt
-     (c-with-op
-      'paren
-      (cat (c-expr (car ls))
-           (let ((flat (fmt-let 'no-wrap? #t (fmt-join c-expr (cdr ls) ", "))))
-             (fmt-if
-              fmt-no-wrap?
-              (c-paren flat)
-              (c-paren
-               (fmt-try-fit
-                flat
-                (lambda (st)
-                  (let* ((col (fmt-col st))
-                         (sep (string-append "," (make-nl-space col))))
-                    ((fmt-join c-expr (cdr ls) sep) st)))))))))))
-
-  (define (c-expr x)
-    (lambda (st) (((or (fmt-gen st) c-expr/sexp) x) st)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; comments, with Emacs-friendly escaping of nested comments
-
-  (define (make-comment-writer st)
-    (let ((output (fmt-ref st 'writer)))
-      (lambda (str st)
-        (let ((lim (- (string-length str) 1)))
-          (let lp ((i 0) (st st))
-            (let ((j (string-index str #\/ i)))
-              (if j
-                  (let ((st (if (and (> j 0)
-                                     (eqv? #\* (string-ref str (- j 1))))
-                                (output
-                                 "\\/"
-                                 (output (substring/shared str i j) st))
-                                (output (substring/shared str i (+ j 1)) st))))
-                    (lp (+ j 1)
-                        (if (and (< j lim) (eqv? #\* (string-ref str (+ j 1))))
-                            (output "\\" st)
-                            st)))
-                  (output (substring/shared str i) st))))))))
-
-  (define (c-comment . args)
-    (lambda (st)
-      ((cat "/*" (fmt-let 'writer (make-comment-writer st)
-                          (apply-cat args))
-            "*/")
-       st)))
-
-  (define (make-block-comment-writer st)
-    (let ((output (make-comment-writer st))
-          (indent (string-append (make-nl-space (+ (fmt-col st) 1)) "* ")))
-      (lambda (str st)
-        (let ((lim (string-length str)))
-          (let lp ((i 0) (st st))
-            (let ((j (string-index str #\newline i)))
-              (if j
-                  (lp (+ j 1)
-                      (output indent (output (substring/shared str i j) st)))
-                  (output (substring/shared str i) st))))))))
-
-  (define (c-block-comment . args)
-    (lambda (st)
-      (let ((col (fmt-col st))
-            (row (fmt-row st))
-            (indent (c-current-indent-string st)))
-        ((cat "/* "
-              (fmt-let 'writer (make-block-comment-writer st) (apply-cat args))
-              (lambda (st)
-                (cond
-                 ((= row (fmt-row st)) ((dsp " */") st))
-                 ;;((= (+ 3 col) (fmt-col st)) ((dsp "*/") st))
-                 (else ((cat fl indent " */") st)))))
-         st))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; preprocessor
-
-  (define (make-cpp-writer st)
-    (let ((output (fmt-ref st 'writer)))
-      (lambda (str st)
-        (let lp ((i 0) (st st))
-          (let ((j (string-index str #\newline i)))
-            (if j
-                (lp (+ j 1)
-                    (output
-                     nl-str
-                     (output " \\" (output (substring/shared str i j) st))))
-                (output (substring/shared str i) st)))))))
-
-  (define (cpp-include file)
-    (if (string? file)
-        (cat fl "#include " (wrt file) fl)
-        (cat fl "#include <" file ">" fl)))
-
-  (define (list-dot x)
-    (cond ((pair? x) (list-dot (cdr x)))
-          ((null? x) #f)
-          (else x)))
-
-  (define (flatten-list ls)
-    (let lp ((ls ls) (res '()))
-      (cond ((pair? ls) (lp (cdr ls) (cons (car ls) res)))
-            ((null? ls) (reverse res))
-            (else (reverse (cons ls res))))))
-
-  (define (replace-tree from to x)
-    (let replace ((x x))
-      (cond ((eq? x from) to)
-            ((pair? x) (cons (replace (car x)) (replace (cdr x))))
-            (else x))))
-
-  (define (cpp-define x . body)
-    (define (name-of x) (c-expr (if (pair? x) (cadr x) x)))
-    (lambda (st)
-      (let* ((body (cond
-                    ((and (pair? x) (list-dot x))
-                     => (lambda (dot)
-                          (if (eq? dot '...)
-                              body
-                              (replace-tree dot '__VA_ARGS__ body))))
-                    (else body)))
-             (params (map (lambda (x) (if (pair? x) (cadr x) x))
-                          (flatten-list (if (pair? x) (cdr x) '()))))
-             (tail
-              (if (pair? body)
-                  (cat " "
-                       (fmt-let 'writer (make-cpp-writer st)
-                                (fmt-let 'macro-params params
-                                         ((if (or (not (pair? x))
-                                                  (and (null? (cdr body))
-                                                       (c-literal? (car body))))
-                                              (lambda (x) x)
-                                              c-paren)
-                                          (c-in-expr (apply c-begin body))))))
-                  (lambda (x) x))))
-        ((c-in-expr
-          (if (pair? x)
-              (cat fl "#define " (name-of (car x))
-                   (c-paren
-                    (fmt-join/dot name-of
-                                  (lambda (dot) (dsp "..."))
-                                  (cdr x)
-                                  ", "))
-                   tail fl)
-              (cat fl "#define " (c-expr x) tail fl)))
-         st))))
-
-  (define (cpp-expr x)
-    (if (or (symbol? x) (string? x)) (dsp x) (c-expr x)))
-
-  (define (cpp-if/aux name check . o)
-    (let* ((pass (and (pair? o) (car o)))
-           (comment (if (member name '("ifdef" "ifndef"))
-                        (cat "  "
-                             (c-comment
-                              " " (if (equal? name "ifndef") "! " "")
-                              check " "))
-                        ""))
-           (endif (if pass (cat fl "#endif" comment) ""))
-           (tail (cond
-                  ((and (pair? o) (pair? (cdr o)))
-                   (if (pair? (cddr o))
-                       (apply cpp-elif (cdr o))
-                       (cat (cpp-else) (cadr o) endif)))
-                  (else endif))))
-      (lambda (st)
-        (let ((indent (c-current-indent-string st)))
-          ((cat fl "#" name " " (cpp-expr check) fl
-                (if pass (cat indent pass) "") fl
-                tail fl)
-           st)))))
-
-  (define (cpp-if check . o)
-    (apply cpp-if/aux "if" check o))
-  (define (cpp-ifdef check . o)
-    (apply cpp-if/aux "ifdef" check o))
-  (define (cpp-ifndef check . o)
-    (apply cpp-if/aux "ifndef" check o))
-  (define (cpp-elif check . o)
-    (apply cpp-if/aux "elif" check o))
-  (define (cpp-else . o)
-    (cat fl "#else " (if (pair? o) (c-comment (car o)) "") fl))
-  (define (cpp-endif . o)
-    (cat fl "#endif " (if (pair? o) (c-comment (car o)) "") fl))
-
-  (define (cpp-wrap-header name . body)
-    (let ((name name))                  ; consider auto-mangling
-      (cpp-ifndef name (c-begin (cpp-define name) nl (apply c-begin body) nl))))
-
-  (define (cpp-line num . o)
-    (cat fl "#line " num (if (pair? o) (cat " " (car o)) "") fl))
-
-  (define (cpp-generic name . ls)
-    (cat fl "#" name (apply-cat ls) fl))
-
-  (define (cpp-undef . args) (apply cpp-generic "undef" args))
-  (define (cpp-pragma . args) (apply cpp-generic "pragma" args))
-  (define (cpp-error . args) (apply cpp-generic "error" args))
-  (define (cpp-warning . args) (apply cpp-generic "warning" args))
-
-  (define (cpp-stringify x)
-    (cat "#" x))
-
-  (define (cpp-sym-cat . args)
-    (fmt-join dsp args " ## "))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; general indentation and brace rules
-
-  (define (c-current-indent-string st . o)
-    (make-space (max 0 (+ (fmt-col st) (if (pair? o) (car o) 0)))))
-
-  (define (c-indent st . o)
-    (dsp (make-space (max 0 (+ (fmt-col st) (or (fmt-indent-space st) 4)
-                               (if (pair? o) (car o) 0))))))
-
-  (define (c-indent/switch st)
-    (dsp (make-space (+ (fmt-col st) (or (fmt-switch-indent-space st) 4)))))
-
-  (define (c-open-brace st)
-    (if (fmt-newline-before-brace? st)
-        (begin
-          (fmt-set! st 'newline-before-brace? #t)
-          (cat "{" nl))
-        (begin
-          (fmt-set! st 'newline-before-brace? #t)
-          (cat " {" nl))))
-
-  (define (c-close-brace st)
-    (dsp "}"))
-
-  (define (c-wrap-stmt x)
-    (fmt-if fmt-expression?
-            (c-expr x)
-            (cat (c-in-expr (c-expr x)) ";" nl)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; code blocks
-
-  (define (c-block . args)
-    (apply c-block/aux 0 args))
-
-  (define (c-block/aux offset header body0 . body)
-    (let ((inner (apply c-begin body0 body)))
-      (if (or (pair? body)
-              (not (or (c-literal? body0)
-                       (and (pair? body0)
-                            (not (c-control-operator? (car body0)))))))
-          (c-braced-block/aux offset header inner)
-          (lambda (st)
-            (if (fmt-braceless-bodies? st)
-                ((cat header fl (c-indent st offset) inner fl) st)
-                ((c-braced-block/aux offset header inner) st))))))
-
-  (define (c-braced-block . args)
-    (apply c-braced-block/aux 0 args))
-
-  (define (c-braced-block/aux offset header . body)
-    (lambda (st)
-      ((cat (if header header "") (c-open-brace st) (c-indent st offset)
-            (apply c-begin body) fl
-            (c-current-indent-string st offset) (c-close-brace st))
-       st)))
-
-  (define (c-begin . args)
-    (apply c-begin/aux #f args))
-
-  (define (c-begin/aux ret? body0 . body)
-    (if (null? body)
-        (c-expr body0)
-        (lambda (st)
-          (if (fmt-expression? st)
-              ((fmt-try-fit
-                (fmt-let 'no-wrap? #t (fmt-join c-expr (cons body0 body) ", "))
-                (lambda (st)
-                  (let ((indent (c-current-indent-string st)))
-                    ((fmt-join c-expr (cons body0 body) (cat "," nl indent)) st))))
-               st)
-              (let ((orig-ret? (fmt-return? st)))
-                ((fmt-join/last c-expr
-                                (lambda (x) (fmt-let 'return? orig-ret? (c-expr x)))
-                                (cons body0 body)
-                                (cat fl (c-current-indent-string st)))
-                 (fmt-set! st 'return? (and ret? orig-ret?))))))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; data structures
-
-  (define (c-struct/aux type x . o)
-    ;; can be just pointer to SUC, need to support such case:
-    ;; struct whatever * - body is just '*'
-    (let* ((name (if (null? o) (if (or (symbol? x) (string? x)) x #f) x))
-           (body (if name (if (not (null? o)) (car o) '()) x))
-           (o (if (null? o) o (cdr o))))
-      (if (and (not (null? body))
-               (not (eq? '* body)))
-          (c-wrap-stmt
-           (cat
-            (c-braced-block
-             (cat type (if (and name (not (equal? name ""))) (cat " " name) ""))
-             (cat
-              (c-in-stmt
-               (if (list? body)
-                   (apply c-begin (map c-wrap-stmt (map c-field body)))
-                   (c-wrap-stmt (c-expr body))))))
-            (if (pair? o) (cat " " (apply c-begin o)) (dsp ""))))
-          (c-wrap-stmt
-           (cat type
-                (if (and name (not (equal? name "")))
-                    (cat " " name)
-                    "")
-                (if (not (null? body))
-                    (cat body)
-                    ""))))))
-
-  (define (c-struct . args) (apply c-struct/aux "struct" args))
-  (define (c-union . args) (apply c-struct/aux "union" args))
-  (define (c-class . args) (apply c-struct/aux "class" args))
-
-  (define (c-enum x . o)
-    (define (c-enum-one x)
-      (if (pair? x) (cat (car x) " = " (c-expr (cadr x))) (dsp x)))
-    (let* ((name (if (null? o) (if (or (symbol? x) (string? x)) x #f) x))
-           (vals (if name (car o) x)))
-      (c-wrap-stmt
-       (cat
-        (c-braced-block
-         (if name (cat "enum " name) (dsp "enum"))
-         (c-in-expr (apply c-begin (map c-enum-one vals))))))))
-
-  (define (c-attribute . args)
-    (cat "__attribute__ ((" (fmt-join c-expr args ", ") "))"))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; basic control structures
-
-  (define (c-while check . body)
-    (c-reset-newline
-     (if (null? body)
-         (cat "while (" (c-in-test (c-expr check)) ");")
-         (cat (c-block (cat "while (" (c-in-test (c-expr check)) ")")
-                       (c-in-stmt (apply c-begin body)))
-              fl))))
-
-  (define (c-for init check update . body)
-    (c-reset-newline
-     (cat
-      (c-block
-       (c-in-expr
-        (cat "for (" (c-expr init) "; " (c-in-test (c-expr check)) "; "
-             (c-expr update ) ")"))
-       (c-in-stmt (apply c-begin body)))
-      fl)))
-
-  (define (c-param x)
-    (cond
-     ((procedure? x) x)
-     ((pair? x) (c-param-type (car x) (cadr x)))
-     (else (error "missing type" x))))
-
-  (define (c-field x)
-    (cond
-     ((procedure? x) x)
-     ((pair? x)
-      (if (list? (car x))
-          (case (caar x)
-            ((union struct class)
-             (if (> (length x) 1)
-                 (c-type (car x)
-                         (cadr x))
-                 (c-type (car x))))
-            (else (c-type (car x) (cadr x))))
-          (c-type (car x)
-                  (fmt-join c-expr (cdr x) ", "))))
-     (else (error "missing type" x))))
-
-  (define (c-param-list ls)
-    (if (null? ls)
-        (c-type 'void)
-        (c-in-expr (fmt-join/dot c-param (lambda (dot) (dsp "...")) ls ", "))))
-
-  (define (c-fun type name params . body)
-    (cat (c-block (c-in-expr (c-prototype type name params))
-                  (c-in-stmt (apply c-begin body)))
-         fl))
-
-  (define (c-prototype type name params . o)
-    (c-wrap-stmt
-     (cat (c-type type) " " (c-expr name) " (" (c-param-list params) ")"
-          (fmt-join/prefix c-expr o " "))))
-
-  (define (c-static x) (cat "static " (c-expr x)))
-  (define (c-const x) (cat "const " (c-expr x)))
-  (define (c-restrict x) (cat "restrict " (c-expr x)))
-  (define (c-volatile x) (cat "volatile " (c-expr x)))
-  (define (c-auto x) (cat "auto " (c-expr x)))
-  (define (c-inline x) (cat "inline " (c-expr x)))
-  (define (c-extern x) (cat "extern " (c-expr x)))
-  (define (c-extern/C . body)
-    (cat "extern \"C\" {" nl (apply c-begin body) nl "}" nl))
-
-  (define (c-type type . o)
-    (let ((name (and (pair? o) (car o))))
-      (cond
-       ((pair? type)
-        (case (car type)
-          ((%fun)
-           (cat (c-type (cadr type) #f)
-                " (*" (or name "") ")("
-                (fmt-join (lambda (x) (c-type x #f)) (caddr type) ", ") ")"))
-          ((%array)
-           (let ((name (cat name "[" (if (pair? (cddr type))
-                                         (c-expr (caddr type))
-                                         "")
-                            "]")))
-             (c-type (cadr type) name)))
-          ((%pointer *)
-           (let ((name (cat "*" (if name (c-expr name) ""))))
-             (c-type (cadr type)
-                     (if (and (pair? (cadr type)) (eq? '%array (caadr type)))
-                         (c-paren name)
-                         name))))
-          ((enum) (apply c-enum name (cdr type)))
-          ((struct union class)
-           (cat (apply c-struct/aux (car type) (cdr type)) (if name (cat " " name) "")))
-          (else (fmt-join/last c-expr (lambda (x) (c-type x name)) type " "))))
-       ((not type)
-        (lambda (st) ((c-type 'int name) st)))
-       (else
-        (cat (if (eq? '%pointer type) '* type) (if name (cat " " name) ""))))))
-
-  (define (c-param-type type . o)
-    (let ((name (and (pair? o) (car o))))
-      (cond
-       ((pair? type)
-        (case (car type)
-          ((%fun)
-           (cat (c-type (cadr type) #f)
-                " (*" (or name "") ")("
-                (fmt-join (lambda (x) (c-type x #f)) (caddr type) ", ") ")"))
-          ((%array)
-           (let ((name (cat name "[" (if (pair? (cddr type))
-                                         (c-expr (caddr type))
-                                         "")
-                            "]")))
-             (c-type (cadr type) name)))
-          ((%pointer *)
-           (let ((name (cat "*" (if name (c-expr name) ""))))
-             (c-type (cadr type)
-                     (if (and (pair? (cadr type)) (eq? '%array (caadr type)))
-                         (c-paren name)
-                         name))))
-          (else (fmt-join/last c-expr (lambda (x) (c-type x name)) type " "))))
-       ((not type)
-        (lambda (st) ((c-type 'int name) st)))
-       (else
-        (cat (if (eq? '%pointer type) '* type) (if name (cat " " name) ""))))))
-
-  (define (c-var type name . init)
-    (c-wrap-stmt
-     (if (pair? init)
-         (cat (c-type type name) " = " (c-expr (car init)))
-         (c-type type (if (pair? name)
-                          (fmt-join c-expr name ", ")
-                          (c-expr name))))))
-
-  (define (c-cast type expr)
-    (cat "(" (c-type type) ")" (c-expr expr)))
-
-  (define (c-typedef type alias . o)
-    (c-wrap-stmt
-     (cat "typedef " (c-type type alias) (fmt-join/prefix c-expr o " "))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; Generalized IF: allows multiple tail forms for if/else if/.../else
-  ;; blocks.  A final ELSE can be signified with a test of #t or 'else,
-  ;; or by simply using an odd number of expressions (by which the
-  ;; normal 2 or 3 clause IF forms are special cases).
-
-  (define (c-if/stmt c p . rest)
-    (lambda (st)
-      (let ((indent (c-current-indent-string st)))
-        ((let lp ((c c) (p p) (ls rest))
-           (if (or (eq? c 'else) (eq? c #t))
-               (if (not (null? ls))
-                   (error "forms after else clause in IF" c p ls)
-                   (cat (c-block/aux -1 " else" p) fl))
-               (let ((tail (if (pair? ls)
-                               (if (pair? (cdr ls))
-                                   (lp (car ls) (cadr ls) (cddr ls))
-                                   (lp 'else (car ls) '()))
-                               fl)))
-                 (cat (c-block/aux
-                       (if (eq? ls rest) 0 -1)
-                       (cat (if (eq? ls rest) (lambda (x) x) " else ")
-                            "if (" (c-in-test (c-expr c)) ")") p)
-                      tail))))
-         st))))
-
-  (define (c-if/expr c p . rest)
-    (let lp ((c c) (p p) (ls rest))
-      (cond
-       ((or (eq? c 'else) (eq? c #t))
-        (if (not (null? ls))
-            (error "forms after else clause in IF" c p ls)
-            (c-expr p)))
-       ((pair? ls)
-        (cat (c-in-test (c-expr c)) " ? " (c-expr p) " : "
-             (if (pair? (cdr ls))
-                 (lp (car ls) (cadr ls) (cddr ls))
-                 (lp 'else (car ls) '()))))
-       (else
-        (c-or (c-in-test (c-expr c)) (c-expr p))))))
-
-  (define (c-if . args)
-    (fmt-if fmt-expression?
-            (apply c-if/expr args)
-            (apply c-if/stmt args)))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; switch statements, automatic break handling
-
-  (define (c-label name)
-    (lambda (st)
-      (let ((indent (make-space (max 0 (- (fmt-col st) 2)))))
-        ((cat fl indent name ":" fl) st))))
-
-  (define c-break
-    (c-wrap-stmt (dsp "break")))
-  (define c-continue
-    (c-wrap-stmt (dsp "continue")))
-  (define (c-return . result)
-    (if (pair? result)
-        (c-wrap-stmt (cat "return " (c-expr (car result))))
-        (c-wrap-stmt (dsp "return"))))
-  (define (c-goto label)
-    (c-wrap-stmt (cat "goto " (c-expr label))))
-
-  (define (c-switch val . clauses)
-    (c-reset-newline
-     (lambda (st)
-       ((cat "switch (" (c-in-expr val) ")" (c-open-brace st)
-             (c-indent/switch st)
-             (c-in-stmt (apply c-begin/aux #t (map c-switch-clause clauses))) fl
-             (c-current-indent-string st) (c-close-brace st) fl)
-        st))))
-
-  (define (c-switch-clause/breaks x)
-    (lambda (st)
-      (let* ((break?
-              (and (car x)
-                   (not (member (cadr x) '(case/fallthrough
-                                           default/fallthrough
-                                           else/fallthrough)))))
-             (explicit-case? (member (cadr x) '(case case/fallthrough)))
-             (indent (c-current-indent-string st))
-             (indent-body (c-indent st))
-             (sep (string-append ":" nl-str indent)))
-        ((cat (c-in-expr
-               (fmt-join/suffix
-                dsp
-                (cond
-                 ((pair? (cadr x))
-                  (map (lambda (y) (cat (dsp "case ") (c-expr y)))
-                       (cadr x)))
-                 (explicit-case?
-                  (map (lambda (y) (cat (dsp "case ") (c-expr y)))
-                       (if (list? (caddr x))
-                           (caddr x)
-                           (list (caddr x)))))
-                 ((member (cadr x)
-                          '(default else default/fallthrough else/fallthrough))
-                  (list (dsp "default")))
-                 (else
-                  (error
-                   "unknown switch clause, expected a list or default but got"
-                   (cadr x))))
-                sep))
-              (make-space (or (fmt-indent-space st) 4))
-              (fmt-join c-expr
-                        (if explicit-case? (cdddr x) (cddr x))
-                        indent-body)
-              (if (and break? (not (fmt-return? st)))
-                  (cat fl indent-body c-break)
-                  ""))
-         st))))
-
-  (define (c-switch-clause x)
-    (if (procedure? x) x (c-switch-clause/breaks (cons #t x))))
-  (define (c-switch-clause/no-break x)
-    (if (procedure? x) x (c-switch-clause/breaks (cons #f x))))
-
-  (define (c-case x . body)
-    (c-switch-clause (cons (if (pair? x) x (list x)) body)))
-  (define (c-case/fallthrough x . body)
-    (c-switch-clause/no-break (cons (if (pair? x) x (list x)) body)))
-  (define (c-default . body)
-    (c-switch-clause/breaks (cons #t (cons 'else body))))
-
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-  ;; operators
-
-  (define (c-op op first . rest)
-    (if (null? rest)
-        (c-unary-op op first)
-        (apply c-binary-op op first rest)))
-
-  (define (c-binary-op op . ls)
-    (define (lit-op? x) (or (c-literal? x) (symbol? x)))
-    (let ((str (display-to-string op)))
-      (c-wrap-stmt
-       (c-maybe-paren
-        op
-        (if (or (equal? str ".") (equal? str "->"))
-            (fmt-join c-expr ls str)
-            (let ((flat
-                   (fmt-let 'no-wrap? #t
-                            (lambda (st)
-                              ((fmt-join c-expr
-                                         ls
-                                         (if (and (fmt-non-spaced-ops? st)
-                                                  (every lit-op? ls))
-                                             str
-                                             (string-append " " str " ")))
-                               st)))))
-              (fmt-if
-               fmt-no-wrap?
-               flat
-               (fmt-try-fit
-                flat
-                (lambda (st)
-                  ((fmt-join c-expr
-                             ls
-                             (cat nl (make-space (+ 2 (fmt-col st))) str " "))
-                   st))))))))))
-
-  (define (c-unary-op op x)
-    (c-wrap-stmt
-     (cat (display-to-string op) (c-maybe-paren op (c-expr x)))))
-
-  ;; some convenience definitions
-
-  (define (c++ . args) (apply c-op "++" args))
-  (define (c-- . args) (apply c-op "--" args))
-  (define (c+ . args) (apply c-op '+ args))
-  (define (c- . args) (apply c-op '- args))
-  (define (c* . args) (apply c-op '* args))
-  (define (c/ . args) (apply c-op '/ args))
-  (define (c% . args) (apply c-op '% args))
-  (define (c& . args) (apply c-op '& args))
-  ;; (define (|c\|| . args) (apply c-op '|\|| args))
-  (define (c^ . args) (apply c-op '^ args))
-  (define (c~ . args) (apply c-op '~ args))
-  (define (c! . args) (apply c-op '! args))
-  (define (c&& . args) (apply c-op '&& args))
-  ;; (define (|c\|\|| . args) (apply c-op '|\|\|| args))
-  (define (c<< . args) (apply c-op '<< args))
-  (define (c>> . args) (apply c-op '>> args))
-  (define (c== . args) (apply c-op '== args))
-  (define (c!= . args) (apply c-op '!= args))
-  (define (c< . args) (apply c-op '< args))
-  (define (c> . args) (apply c-op '> args))
-  (define (c<= . args) (apply c-op '<= args))
-  (define (c>= . args) (apply c-op '>= args))
-  (define (c= . args) (apply c-op '= args))
-  (define (c+= . args) (apply c-op "+=" args))
-  (define (c-= . args) (apply c-op "-=" args))
-  (define (c*= . args) (apply c-op '*= args))
-  (define (c/= . args) (apply c-op '/= args))
-  (define (c%= . args) (apply c-op '%= args))
-  (define (c&= . args) (apply c-op '&= args))
-  ;; (define (|c\|=| . args) (apply c-op '|\|=| args))
-  (define (c^= . args) (apply c-op '^= args))
-  (define (c<<= . args) (apply c-op '<<= args))
-  (define (c>>= . args) (apply c-op '>>= args))
-
-  (define (c. . args) (apply c-op "." args))
-  (define (c-> . args) (apply c-op "->" args))
-
-  (define (c-bit-or . args) (apply c-op "|" args))
-  (define (c-or . args) (apply c-op "||" args))
-  (define (c-bit-or= . args) (apply c-op "|=" args))
-
-  (define (c++/post x)
-    (cat (c-maybe-paren 'post-increment (c-expr x)) "++"))
-  (define (c--/post x)
-    (cat (c-maybe-paren 'post-decrement (c-expr x)) "--")))

sex-macros.module.scm

@@ -1,8 +0,0 @@
-(module sex-macros
-    (register-macro
-     cat
-     get-macro
-     macro?
-     apply-macro
-     defmacro)
-  "sex-macros.scm")

sex-macros.scm

@@ -1,38 +0,0 @@
-(import
-  scheme
-  (only fmt fmt)
-  (chicken base)
-  (chicken plist)
-  (chicken string))
-
-(define (cat-syms s-1 s-2)
-  (fmt #f s-1 s-2))
-
-(define (cat sym-1 sym-2)
-  (string->symbol (cat-syms sym-1 sym-2)))
-
-(define (register-macro name arglist body)
-  (put! name 'sex-macro
-        `(lambda ,arglist
-           (import scheme
-                   (only sex-macros cat))
-           ,@body)))
-
-(define (get-macro name)
-  (eval (get name 'sex-macro)))
-
-(define (macro? form)
-  (and (list? form)
-       (symbol? (car form))
-       (get (car form) 'sex-macro)))
-
-(define (apply-macro form)
-  (assert (macro? form)
-          (fmt #f (car form) " is not a macro"))
-  (apply (get-macro (car form))
-         (cdr form)))
-
-(define (defmacro form)
-  (let ((arglist (car form))
-        (body (cdr form)))
-    (register-macro (car arglist) (cdr arglist) body)))

sex-mode.el

@@ -28,20 +28,12 @@ All commands in `lisp-mode-shared-map' are inherited by this map.")
     (list
      ;; Declarations
      (list (concat "("
-                   (regexp-opt '("chicken-define"
-                                 "chicken-define-syntax"
-                                 "chicken-import"
-                                 "chicken-load"
-                                 "define"
-                                 "defmacro"
-                                 "extern"
-                                 "import"
-                                 "include"
+                   (regexp-opt '("include"
                                  "fn"
                                  "pub"
                                  "struct"
-                                 "var"
-                                 "union")
+                                 "template"
+                                 "var")
                                'word)
                    "\\>"
                    "[[:space:]]*"
@@ -51,9 +43,7 @@ All commands in `lisp-mode-shared-map' are inherited by this map.")
      ;; Keywords
      (list (concat "("
                    (regexp-opt '(
-                                 "begin"
                                  "case"
-                                 "default"
                                  "do"
                                  "if"
                                  "for"
@@ -79,14 +69,9 @@ All commands in `lisp-mode-shared-map' are inherited by this map.")
   (setq-local prettify-symbols-alist lisp-prettify-symbols-alist))
 
 (put 'fn 'lisp-indent-function 'defun)
-(put 'pub 'lisp-indent-function 'defun)
-(put 'defmacro 'lisp-indent-function 'defun)
+(put 'template 'lisp-indent-function 'defun)
 (put 'struct 'lisp-indent-function 'defun)
-(put 'union 'lisp-indent-function 'defun)
 (put 'var 'lisp-indent-function 0)
-(put 'import 'lisp-indent-function 1)
-(put 'switch 'lisp-indent-function 1)
-(put 'case 'lisp-indent-function 1)
 
 ;;;###autoload
 (define-derived-mode sex-mode lisp-data-mode "Sex"

sex-modules.module.scm

@@ -1,5 +0,0 @@
-(module sex-modules
-    (get-modules-public-forms
-     load-persistent-module-paths
-     read-public-interface)
-  "sex-modules.scm")

sex-modules.scm

@@ -1,87 +0,0 @@
-(import
-  scheme
-  brev-separate
-  (chicken base)
-  (chicken file)
-  (chicken load)
-  (chicken pathname)
-  (chicken process-context)
-  (chicken string)
-  fmt
-  reader
-  srfi-1
-  utils)
-
-(define +persistent-module-paths+ (list))
-
-(define (get-modules-public-forms module-list)
-  ;; Module list is a list of symbols
-  ;; How Sex handles modules:
-  ;; For each module in a list, construct path, find module by path in
-  ;; module path directories, extract public definitions from the
-  ;; module, paste them in current one in emulation of C include
-  ;; directives.
-  (fold-right append (list)
-              (map (fn (import-module (symbol->string x)))
-                   module-list)))
-
-(define (import-module name)
-  (let ((module-path (locate-module name)))
-    (assert module-path (fmt #f "Failed to find module " name " in "
-                             (get-module-paths)))
-    (read-public-interface module-path)))
-
-(define (get-module-paths)
-  (cons (current-directory)
-        +persistent-module-paths+))
-
-(define (locate-module name)
-  ;; Module locations: relative to file being compiled, or in what was
-  ;; in SEX_MODULE_PATH env var at the start of the process (see
-  ;; load-persistent-module-paths function)
-
-  (let ((search-paths (get-module-paths)))
-    (let loop ((paths search-paths))
-      (if (null? paths)
-          #f
-          (or (module-exists? name (car paths))
-              (loop (cdr paths)))))))
-
-(define (module-exists? name module-dir)
-  ;; returns absolute path to module, if it exists
-  (and (directory-exists? module-dir)
-       (let ((module-path (make-absolute-pathname module-dir name "sex")))
-         (and (file-exists? module-path)
-              (file-readable? module-path)
-              module-path))))
-
-(define (read-public-interface module-path)
-  ;; pub fns are reduced to prototypes, other pub forms are just pasted
-  (let ((raw-forms (read-from-file module-path)))
-    (fold
-     process-public-interface-form
-     (list)
-     raw-forms)))
-
-;;; TODO: use semen facilities to analyze modules
-(define (process-public-interface-form form acc)
-  (case (car form)
-    ((pub)
-     (case (cadr form)
-       ((fn)                 ; replace with prototype
-        ;; fn type name (arg-list) (body)
-        ;; 1    2   3       4 - we need first 4
-        (cons (take (cdr form) 4) acc))
-       ((define defmacro import include struct typedef union var)
-        (cons (cdr form) acc))
-       (else (error "Pub what? " (cadr form)))))
-    (else acc)))
-
-(define (load-persistent-module-paths)
-  (let ((sex-module-path-env-var
-         (get-env-var "SEX_MODULE_PATH")))
-    (when sex-module-path-env-var
-      (set! +persistent-module-paths+
-        (map (lambda (p)
-               (make-absolute-pathname p #f #f))
-             (string-split sex-module-path-env-var ":"))))))

sexc.module.scm

@@ -1 +0,0 @@
-(module sexc (main) "sexc.scm")

sexc.scm

@@ -1,62 +1,136 @@
-(import scheme
-        brev-separate
-        (chicken base)
-        (chicken file)
-        (chicken plist)
+(declare (unit sexc)
+         (uses templates))
+
+(import brev-separate
+        (chicken pathname)
         (chicken pretty-print)
-        (chicken process)
         (chicken process-context)
-        (chicken port)
+        (chicken string)
         fmt
-        fmt-c-writer
+        fmt-c
         getopt-long
-        sex-macros
-        sex-modules
-        reader
-        semen
         srfi-1                          ; list routines
-        srfi-13
-        tree
-        utils)
+        tree)
+
+(define +debug+ #f)
+
+(define (unkebabify sym)
+  (case sym
+    ((-) sym)
+    ((--) sym)
+    ((->) sym)
+    ((-=) sym)
+    (else
+     (string->symbol
+      (string-translate (symbol->string sym) #\- #\_)))))
+
+(define (atom-to-fmt-c atom)
+  (case atom
+    ((fn) '%fun)
+    ((var) '%var)
+    ((begin) '%begin)
+    ((pointer) '%pointer)
+    ((array) '%array)
+    ((@) 'vector-ref)
+    ((include) '%include)
+    ((cast) '%cast)
+    (else
+     (if (symbol? atom)
+         (unkebabify atom)
+         atom))))
+
+(define (tree-finder symbol)
+  (lambda (node)
+    (or (and (tree? node)
+             (eq? (car node) symbol))
+        #f)))
+
+(define (walk-generic form acc)
+  (if (eq? (car form) 'unquote)
+      ;; special case - replace top-level unquote with it's expansion
+      (append
+       (fold append (list)
+             (map (fn (walk-sex-tree x (list)))
+                  (eval (cadr form))))
+       acc)
+      (let loop ((unquote-form (tree-find (tree-finder 'unquote) form #f)))
+        (if unquote-form
+            (begin
+              (let* ((inv (invert-tree form))
+                     (pos (tree-local-position inv unquote-form)))
+                (for-each (fn
+                           (set! form (tree-insert inv (tree-parent inv unquote-form) pos x))
+                           (set! inv (invert-tree form)))
+                          (reverse (eval (cadr unquote-form))))
+                (set! form (tree-prune inv unquote-form)))
+              (loop (tree-find (tree-finder 'unquote)
+                               form
+                               #f)))
+            (cons (tree-map atom-to-fmt-c form) acc)))))
+
+(define (walk-function form static acc)
+  (if static
+      (walk-generic (list 'static form) acc)
+      (walk-generic (cdr form) acc)))
+
+(define (walk-struct form acc)
+  (let ((name (unkebabify (cadr form))))
+    (walk-generic form (cons `(typedef struct ,name ,name) acc))))
+
+(define (walk-sex-tree form acc)
+  (case (car form)
+    ((fn) (walk-function form #t acc))
+    ((pub) (walk-function form #f acc))
+    ((struct) (walk-struct form acc))
+    (else (walk-generic form acc))))
+
+(define (process-form form acc)
+  (case (car form)
+    ((define) (eval form) acc)
+    ((template) (eval form) acc)
+    ((load) (eval form) acc)
+    ((instance) (walk-sex-tree (eval form) acc))
+    (else
+     (walk-sex-tree form acc))))
+
+(define (process-raw-forms raw-forms acc)
+  (if (null? raw-forms) (filter (fn (not (null? x)))
+                                (reverse acc))
+      (process-raw-forms (cdr raw-forms)
+                         (process-form (car raw-forms) acc))))
+
+(define (read-forms acc)
+  (let ((r (read)))
+    (if (eof-object? r) (reverse acc)
+        (read-forms (cons r acc)))))
+
+(define (emit-c forms)
+  (for-each (lambda (form)
+              (fmt #t (c-expr form))
+              (fmt #t "\n"))
+            forms))
 
 ;;; Main function facilities
 
 (define opts-grammar
-  (let ((padding 26))
-    `((c-compiler ,(fmt #f "Select C compiler. Defaults to value of SEX_CC" nl
-                        (pad padding) "environment variable, or if it is empty, to cc")
+  `((output "Write output to file"
             (required #f)
-                  (value #t))
-      (compile-object "Compile object file instead of executable program"
-                      (required #f)
-                      (value #f)
-                      (single-char #\c))
-      (emit-c "Emit C code"
-              (required #f)
-              (value #f)
-              (single-char #\C))
-      (public-interface "Get module's public interface"
-                        (required #f)
-                        (value #f))
+            (value #t)
+            (single-char #\o))
     (help "Show this help"
           (required #f)
           (value #f)
           (single-char #\h))
-      (macro-expand "Emit macro-expanded semantically processed Sex code"
+    (macro-expand "Emit macro-expanded Sex code instead of C"
                   (required #f)
                   (value #f)
-                    (single-char #\m))
-      (output ,(fmt #f "Write output to file. Default file name is a.out." nl
-                    (pad padding) "If -E or -m options are provided, defaults to stdout")
-              (required #f)
-              (value #t)
-              (single-char #\o)))))
+                  (single-char #\m))))
 
 (define (print-help)
-  (fmt #t "Usage: sexc [options] filename [-- options-for-c-compiler]\n")
-  (fmt #t "Options:\n")
-  (fmt #t (usage opts-grammar))
-  (fmt #t ""))
+  (fmt #t "Usage: sexc [OPTIONS] [FILE]\n")
+  (fmt #t "Options: -o, --output <file>        Write output to file. If omitted, write to stdout\n")
+  (fmt #t "         -h, --help                 Show this help\n")
+  (fmt #t "         -m, --macro-expand         Emit macro-expanded Sex code instead of C\n"))
 
 (define (help-arg? args)
   (assoc 'help args))
@@ -66,101 +140,44 @@
     (if arg (cdr arg)
         default)))
 
-(define (get-rest-args args)
-  (cdr (assoc '@ args)))
-
-(define (get-c-compiler-args args)
-  (filter (fn (string-prefix? "-" x)) (get-rest-args args)))
-
 (define (get-input-file args)
-  (let ((rest-args (get-rest-args args)))
-    (if (null? rest-args)
+  (let ((rest-args (assoc '@ args)))
+    (if (= 1 (length rest-args))
         'stdin
-        (car rest-args))))
+        (cadr rest-args))))
 
-(define (write-to-file-or-stdout output what)
-  (if (eq? output 'default)
-      (what)
-      (with-output-to-file output
-        (fn (what)))))
+(define (read-from-file file)
+  (with-input-from-file (pathname-strip-directory file)
+    (fn (read-forms (list)))))
 
-(define (emit-c-or-sex sex-forms output args)
-  (write-to-file-or-stdout output
-                           (lambda ()
-                             (if (get-arg args 'macro-expand #f)
-                                 (map pp sex-forms)
-                                 (emit-c sex-forms)))))
-
-(define (compile-to-file sex-forms output args)
-  (let ((compiler (or (get-arg args 'c-compiler #f)
-                      (get-env-var "SEX_CC")
-                      "cc"))
-        (out-file (if (eq? output 'default)
-                      "a.out"
-                      output)))
-    (call-with-values
-        (lambda ()
-          (process compiler (append (list "-o" out-file "-x" "c")
-                                    (if (get-arg args 'compile-object #f)
-                                        (list "-c")
-                                        (list))
-                                    (list "-")  ; read stdin
-                                    (get-c-compiler-args args))))
-      (lambda (out-port in-port pid)
-        (with-output-to-port in-port
-          (lambda () (emit-c sex-forms)))
-        (close-output-port in-port)
-        (process-wait pid)))))
-
-(define (semantic-process-forms raw-forms input-source)
-  (if (eq? input-source 'stdin)
-      (semen-process raw-forms)
-      (with-directory input-source
-                      (semen-process raw-forms))))
-
-(define prelude
-  '((include inttypes.h)
-
-    (typedef u8 uint8-t)
-    (typedef i8 int8-t)
-    (typedef u16 uint16-t)
-    (typedef i16 int16-t)
-    (typedef u32 uint32-t)
-    (typedef i32 int32-t)
-    (typedef u64 uint64-t)
-    (typedef i64 int64-t)))
+(define (set-working-directory file)
+  (change-directory
+   (normalize-pathname
+    (make-absolute-pathname
+     (current-directory)
+     (pathname-directory file)))))
 
 (define (main)
   (let* ((raw-args (command-line-arguments))
+         (current-dir (current-directory))
          (args (getopt-long raw-args
                             opts-grammar))
-         (output (get-arg args 'output 'default))
+         (output (get-arg args 'output 'stdout))
          (help (help-arg? args))
-
-         (input (get-input-file args))
-         (current-dir (current-directory)))
-    (call/cc
-     (lambda (return)
-       (when help
-         (print-help)
-         (return #f))
-       (when (get-arg args 'public-interface #f)
-         (assert (not (eq? input 'stdin)) "Error: --public-interface requires file argument")
-
-         (write-to-file-or-stdout
-          output
-          (fn
-           (map pp (reverse
-                    (read-public-interface input)))))
-         (return #f))
-       (load-persistent-module-paths)
-
-       (sex-fmt-current-file (to-absolute-pathname input))
-       (let* ((raw-forms (append prelude (read-raw-forms input)))
-              (sex-forms (semantic-process-forms raw-forms input)))
-         (if (or (get-arg args 'macro-expand #f)
-                 (get-arg args 'emit-c #f))
-             ;; Emit processed and macro-expanded sex code, or emit C code
-             (emit-c-or-sex sex-forms output args)
-             ;; Compile file!
-             (compile-to-file sex-forms output args)))))))
+         (input (get-input-file args)))
+    (if help (print-help)
+        (let* ((raw-forms
+                (if (eq? input 'stdin)
+                    (read-forms (list))
+                    (begin
+                      (set-working-directory input)
+                      (read-from-file input))))
+               (sex-forms (process-raw-forms raw-forms (list))))
+          (change-directory current-dir)
+          (if (get-arg args 'macro-expand #f)
+              (map pp sex-forms)
+              (if (not (eq? output 'stdout))
+                  (with-output-to-file output
+                    (lambda ()
+                      (emit-c sex-forms)))
+                  (emit-c sex-forms)))))))

templates.scm

@@ -0,0 +1,56 @@
+(declare (unit templates))
+
+(import brev-separate
+        fmt
+        regex
+        srfi-1                          ; list routines
+        tree)
+
+
+(define-syntax template
+  (syntax-rules ()
+    ((_ (name subst-list args ...) body ...)
+     (define (name subst-list-arg args ...)
+       (let* ((subst-alist (map cons 'subst-list subst-list-arg))
+              (replaced-body (apply-substitution `(body ...) subst-alist)))
+         replaced-body)))))
+
+(define (apply-symbol-substitution sym subst-alist)
+  ;; All non-symbol substitutions will be filtered.
+  ;; E.g. if the subst-alist is ((T + 1 2) (U . w) (W . e)),
+  ;; only ((U . w) (W . e)) will be applied to symbols.
+  (let ((str (symbol->string sym))
+        (subst-map (map (fn
+                         (if (symbol? (car x))
+                             (cons
+                              (fmt #f "([^\\-]?)" (symbol->string (car x)) "([\\-$]?)")
+                              (fmt #f "\\1" (symbol->string (cdr x)) "\\2"))
+                             x))
+                        (filter (fn (not (list? (cdr x)))) subst-alist))))
+    (string->symbol
+     (string-substitute* str subst-map))))
+
+(define (maybe-replace-symbol sym subst-alist)
+  (call/cc
+   (lambda (return)
+     (for-each (fn (when (eq? (car x) sym)
+                     (return (cdr x))))
+               subst-alist)
+     (return sym))))
+
+(define (apply-substitution target subst-alist)
+  ;; Subsitute free symbols and -/$/^ separated parts
+  ;; of symbols with provided forms.
+  ;; E.g. with substitution (T int):
+  ;; list-T -> list-int ; by apply-symbol-substitution
+  ;; (var T data) -> (var int data) ; by maybe-replace-symbol
+  ;; see respective functions for further details.
+  (tree-map
+   (fn
+    (if (symbol? x)
+        (let ((st (maybe-replace-symbol x subst-alist)))
+          (if (eq? st x)
+              (apply-symbol-substitution x subst-alist)
+              st))
+        x))
+   target))

tests/Makefile

@@ -1,45 +0,0 @@
-CHICKEN_C = csc
-
-CSC_FLAGS += -K prefix -static
-MODULE_FLAGS = -emit-all-import-libraries -module-registration -c
-
-MODULES = utils sex-macros reader sex-modules semen sex-fmt-c fmt-c-writer sexc
-SEX_OBJ = $(MODULES:%=%.o)
-
-TESTS = basic semen reader fmt-c-writer utils
-TEST_SRCS = $(TESTS:%=%.scm)
-
-sex-tests: run.scm $(TEST_SRCS) $(SEX_OBJ)
-	$(CHICKEN_C) $(CSC_FLAGS) run.scm -o sex-tests -link sexc
-
-#------------------------------------------------------------------
-
-utils.o: utils.module.scm ../utils.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) utils.module.scm -o utils.o -unit utils
-
-sex-macros.o: sex-macros.module.scm ../sex-macros.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sex-macros.module.scm -o sex-macros.o -unit sex-macros
-
-reader.o: reader.module.scm ../reader.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) reader.module.scm -o reader.o -unit reader
-
-sex-modules.o: sex-modules.module.scm ../sex-modules.scm reader.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sex-modules.module.scm -o sex-modules.o -unit sex-modules -link reader,utils
-
-semen.o: semen.module.scm ../semen.scm sex-macros.o sex-modules.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) semen.module.scm -o semen.o -unit semen -link sex-macros,sex-modules,utils
-
-sex-fmt-c.o: ../sex-fmt-c.scm
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) ../sex-fmt-c.scm -o sex-fmt-c.o -unit sex-fmt-c
-
-fmt-c-writer.o: fmt-c-writer.module.scm ../fmt-c-writer.scm sex-fmt-c.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) fmt-c-writer.module.scm -o fmt-c-writer.o -unit fmt-c-writer -link sex-fmt-c,utils
-
-sexc.o: sexc.module.scm ../sexc.scm fmt-c-writer.o sex-macros.o sex-modules.o reader.o semen.o utils.o
-	$(CHICKEN_C) $(CSC_FLAGS) $(MODULE_FLAGS) sexc.module.scm -o sexc.o -unit sexc -link fmt-c-writer,sex-macros,sex-modules,reader,semen,utils
-
-clean:
-	rm -f $(OBJ)
-	rm -f *.import.scm
-	rm -f *.link
-	rm -f sex-tests

tests/basic.scm

@@ -1,33 +0,0 @@
-(import fmt-c-writer)
-
-(test-group "basic"
-
-  ;; unkebabify
-  (test '- (unkebabify '-))
-  (test '-- (unkebabify '--))
-  (test '-> (unkebabify '->))
-  (test '-= (unkebabify '-=))
-  (test 'kebab_case (unkebabify 'kebab-case))
-  (test '_what_ (unkebabify '-what-))
-  (test 'this->member (unkebabify 'this->member))
-  (test '_this_->_member_ (unkebabify '-this-->-member-))
-  (test '__->>> (unkebabify '--->>>))
-
-  ;; atom-to-fmt-c
-  (test '%fun (atom-to-fmt-c 'fn))
-  (test '%prototype (atom-to-fmt-c 'prototype))
-  (test '%block-begin (atom-to-fmt-c 'begin))
-  (test '%define (atom-to-fmt-c 'define))
-  (test '%pointer (atom-to-fmt-c 'pointer))
-  (test '%array (atom-to-fmt-c 'array))
-  (test 'vector-ref (atom-to-fmt-c '¤))
-  (test '%include (atom-to-fmt-c 'include))
-
-  ;; c89 stuff
-  (test 'int (atom-to-fmt-c 'bool))
-  (test 1 (atom-to-fmt-c 'true))
-  (test 0 (atom-to-fmt-c 'false))
-
-  ;; make-field-access
-  (test 'a.b (make-field-access '(.b a)))
-  (test 'a.b.c (make-field-access '(.c a.b))))

tests/fmt-c-writer.module.scm

@@ -1,3 +0,0 @@
-(module fmt-c-writer
-    *
-  "../fmt-c-writer.scm")

tests/fmt-c-writer.scm

@@ -1,159 +0,0 @@
-;;; Types
-(test-group "fmt-writer"
-
-  (test
-   '(const int)
-   (walk-type '(const int)))
-
-  (test
-   '(%array (const char) 512)
-   (walk-type '(¤ const char 512)))
-
-  (test
-   '(%array (float) 512)
-   (walk-type '(¤ (float) 512)))
-
-  (test
-   '(%array (const char) 512)
-   (walk-type '(¤ (const char) 512)))
-
-  (test
-   '(%array (const char))
-   (walk-type '(¤ const char)))
-
-  (test
-   '(%array (const char))
-   (walk-type '(¤ (const char))))
-
-  (test
-   '(%array float 8)
-   (walk-type '(¤ float 8)))
-
-  (test
-   "Pointer to const char"
-   '(const char *)
-   (walk-type '(* const char)))
-
-  (test
-   "Const pointer to const char"
-   '(const char * const)
-   (walk-type '(const * const char)))
-
-  (test
-   '(%fun void ((int) (float) (%array (struct what * const))))
-   (walk-type '(fn ((int) (float) (¤ (const * struct what))) void)))
-
-  (test
-   '(%fun void ((int) (%array float) (%array (struct what * const))))
-   (walk-type '(fn ((int) (¤ float) (¤ (const * struct what))) void)))
-
-  (test
-   '(%array (%fun void ((int) (%array float) (%array (struct what * const)))))
-   (walk-type '(¤ (fn ((int) (¤ float) (¤ (const * struct what))) void))))
-
-  ;; Type convert to C
-  (test
-   '(int)
-   (type-convert-to-c '(int)))
-
-  (test
-   '(* int)
-   (type-convert-to-c '(int *)))
-
-  (test
-   '(* const int)
-   (type-convert-to-c '(const int *)))
-
-  (test
-   '(const * const char)
-   (type-convert-to-c '(const char * const)))
-
-;;; Variable defs
-  (test
-   '(%var (%array float 8) a)
-   (walk-var '(var a (¤ float 8))))
-
-  (test
-   '(%var (int *) a (& n))
-   (walk-var '(var a (* int) (& n))))
-
-  (test
-   '(%var (const int *) a (& n))
-   (walk-var '(var a (* const int) (& n))))
-
-  (test
-   '(%var (struct suc) s)
-   (walk-var '(var s (struct suc))))
-
-  (test
-   '(%var (const struct suc *) s s1)
-   (walk-var '(var s (* const struct suc) s1)))
-
-  (test
-   '(%var (const struct suc *) s s1)
-   (walk-var '(var s (* (const struct suc)) s1)))
-
-  (test
-   '(%var (struct suc) s (hoge piyo))
-   (walk-var '(var s (struct suc) (hoge piyo))))
-
-  (test
-   '(%var (struct suc *) s (hoge piyo))
-   (walk-var '(var s (* struct suc) (hoge piyo))))
-
-;;; Fn defs
-  (test
-   '(%fun void puk ((int) (%array float 8)))
-   (walk-fn-def '(fn puk ((int) (¤ float 8)) void)))
-
-  (test
-   '(%fun int main ((int argc) ((%array (const char)) argv))
-          (return 0))
-   (walk-fn-def
-    '(fn main ((argc int) (argv (¤ const char))) int
-         (return 0))))
-  (test
-   '(%fun int quxu (((struct piq *) bar))
-          (return 0))
-   (walk-fn-def
-    '(fn quxu ((bar (* struct piq))) int
-         (return 0))))
-
-  (test
-   '(%fun int quxu (((struct piq *) bar) ((%array (struct tt *)) ploop))
-          (return 0))
-   (walk-fn-def
-    '(fn quxu ((bar (* struct piq)) (ploop (¤ * struct tt))) int
-         (return 0))))
-
-  ;; Structs
-  (test
-   '(struct no_kebab ((int a) (float f)))
-   (walk-struct '(struct no-kebab ((a int) (f float)))))
-
-  (test
-   '(struct settings ((u32 x y w h)
-                      ((%array (struct ((float r g b a))) 4) colors)))
-   (walk-struct
-    '(struct settings
-             ((x y w h u32)
-              (colors [¤ struct ((r g b a float)) 4])))))
-
-  (test
-   '(struct settings ((u32 x y w h)
-                      ((%array (struct color ((float r g b a))) 4) colors)))
-   (walk-struct
-    '(struct settings
-             ((x y w h u32)
-              (colors [¤ struct color ((r g b a float)) 4])))))
-
-  (test
-   '(struct mega_kebab ((int a)
-                        ((struct ((int year) (int month) (int day))) dob)
-                        ((%fun int ((int) (%array int))) min)))
-   (walk-struct '(struct mega-kebab
-                         ((a int)
-                          (dob (struct ((year int)
-                                        (month int)
-                                        (day int))))
-                          (min (fn ((int) (¤ int)) bool)))))))

tests/reader.module.scm

@@ -1,3 +0,0 @@
-(module reader
-    *
-  "../reader.scm")

tests/reader.scm

@@ -1,18 +0,0 @@
-(import (chicken port)
-        reader)
-
-(define-syntax reader-test
-  (syntax-rules ()
-    ((reader-test result string)
-     (test result
-           (with-input-from-string string
-             (lambda () (read-raw-forms 'stdin)))))))
-
-(test-group "reader"
-  ;; []-syntax. For array types and array access expressions
-  (reader-test '((¤ * char)) "[* char]")
-  (reader-test '((¤ * * char const 512)) "[* * char const 512]")
-  (reader-test '((¤)) "[]")
-  (reader-test '((¤ (¤))) "[[]]")
-  (reader-test '((¤ (¤ const char))) "[[const char]]")
-)

tests/run.scm

@@ -1,11 +0,0 @@
-(import
-  test)
-
-(include "basic.scm")
-(include "semen.scm")
-(include "reader.scm")
-(include "fmt-c-writer.scm")
-(include "utils.scm")
-
-;;; Should be the last in the test suite
-(test-exit)

tests/semen.module.scm

@@ -1,2 +0,0 @@
-(module semen *
-  "../semen.scm")

tests/semen.scm

@@ -1,57 +0,0 @@
-(import srfi-69
-        semen)
-
-(define print-str-fn
-  '(fn void print-str ((string s))
-       (printf "%s" s)))
-
-(define sum-fn
-  '(pub fn float sum ((int a) (int b))
-        (return (cast float (+ a b)))))
-
-(test-group "semen"
-  (test-assert (sex-fn? print-str-fn))
-  (test #f (sex-fn-public? print-str-fn))
-  (test 'void (sex-fn-return-type print-str-fn))
-  (test 'print-str (sex-fn-name print-str-fn))
-  (test '((string s)) (sex-fn-arglist print-str-fn))
-  (test '(fn void print-str ((string s))) (sex-fn-prototype print-str-fn))
-  (test '((printf "%s" s)) (sex-fn-body print-str-fn))
-
-  (test-assert (sex-fn? sum-fn))
-  (test #t (sex-fn-public? sum-fn))
-  (test 'float (sex-fn-return-type sum-fn))
-  (test 'sum (sex-fn-name sum-fn))
-  (test '((int a) (int b)) (sex-fn-arglist sum-fn))
-  (test '(pub fn float sum ((int a) (int b))) (sex-fn-prototype sum-fn))
-  (test '((return (cast float (+ a b)))) (sex-fn-body sum-fn))
-
-  (let ((sex-code
-         '((defmacro (sum-var name a b c)
-             `(var ,name ,(+ a b c)))
-
-           (sum-var v 1 2 3))))
-
-    (test '((var v 6)) (semen-process sex-code)))
-
-;;; Macro expansion
-
-  (define (form-identity form env)
-    form)
-
-  (test 'a (walk-form 'a form-identity (make-hash-table)))
-  (test '(a b c) (walk-form '(a b c) form-identity (make-hash-table)))
-
-  (test 'a (macro-expand 'a))
-  (test '(a b c) (macro-expand '(a b c)))
-
-  (let ((sex-code-macro
-         '((defmacro (x10 a)
-             `(* 10 ,a))
-
-           (fn void foo ((int a) (int b))
-               (return (+ a (x10 b)))))))
-
-    (test '((fn void foo ((int a) (int b))
-                (return (+ a (* 10 b)))))
-          (semen-process sex-code-macro))))

tests/sex-macros.module.scm

@@ -1,3 +0,0 @@
-(module sex-macros
-    *
-  "../sex-macros.scm")

tests/sex-modules.module.scm

@@ -1,3 +0,0 @@
-(module sex-modules
-    *
-  "../sex-modules.scm")

tests/sexc.module.scm

@@ -1 +0,0 @@
-(module sexc (main) "../sexc.scm")

tests/utils.module.scm

@@ -1,3 +0,0 @@
-(module utils
-    *
-  "../utils.scm")

tests/utils.scm

@@ -1,24 +0,0 @@
-(import utils)
-
-(test-group "utils"
-
-  (test
-   '((1) (2) (3))
-   (list-split '(1 * 2 * 3) '*))
-
-  (test
-   '((1 2 3))
-   (list-split '(1 2 3) '*))
-
-  (test
-   '(() (1) (2) (3) ())
-   (list-split '(* 1 * 2 * 3 *) '*))
-
-  (test
-   '((const) (const struct something))
-   (list-split '(const * const struct something) '*))
-
-  (test
-   '(1 * 2 * 3)
-   (list-join '(1 2 3) '*))
-)

utils.module.scm

@@ -1,10 +0,0 @@
-(module utils
-    (get-env-var
-     set-working-directory
-     to-absolute-pathname
-     list-split
-     list-join
-     recons
-     with-directory
-     )
-  "utils.scm")

utils.scm

@@ -1,66 +0,0 @@
-(import
-  scheme
-  (chicken base)
-  (chicken pathname)
-  (chicken process-context)
-  srfi-1)
-
-(define-syntax prog1
-  (syntax-rules ()
-    ((prog1 form . forms)
-     (let ((res form))
-       (begin . forms)
-       res))))
-
-(define-syntax with-directory
-  (syntax-rules ()
-    ((with-directory path form . forms)
-     (let ((current-dir (current-directory)))
-       (set-working-directory path)
-       (prog1
-        (begin form . forms)
-        (change-directory current-dir))))))
-
-(define (get-env-var name)
-  (get-environment-variable name))
-
-(define (set-working-directory file)
-  (change-directory
-   (normalize-pathname
-    (if (absolute-pathname? file)
-        (pathname-directory file)
-        (make-absolute-pathname
-         (current-directory)
-         (pathname-directory file))))))
-
-(define (to-absolute-pathname pathname)
-  (if (absolute-pathname? pathname)
-      pathname
-      (make-absolute-pathname
-       (current-directory)
-       pathname)))
-
-(define (list-split src-list split-elt)
-  ;; split '(1 2 / 3 4 / 5 6) by '/ -> '((1 2) (3 4) (5 6))
-  (fold (lambda (elt acc)
-          (if (eq? elt split-elt)
-              (append acc (list (list)))
-              (append (drop-right acc 1)
-                      (list (append (last acc) (list elt))))))
-        (list (list))
-        src-list))
-
-(define (list-join lists join-by)
-  (drop-right
-   (fold (lambda (elt acc)
-           (append acc (list elt) (list join-by)))
-         (list)
-         lists)
-   1))
-
-;;; Reconstruct form
-(define (recons old-cons new-car new-cdr)
-  (if (and (eq? new-car (car old-cons))
-           (eq? new-cdr (cdr old-cons)))
-      old-cons
-      (cons new-car new-cdr)))