enable includes to have multiple targets

semen.scm

@@ -72,7 +72,7 @@
     ((or ('var . _)
          ('pub 'var . _)
          ('extern 'var . _)) (process-global-var sex-form acc))
-    (('include _) (cons sex-form acc))
+    (('include . includes) (process-includes sex-form includes acc))
     ((or ('define name . _)
          ('pub 'define name . _))
      (add-define name sex-form)
@@ -92,6 +92,17 @@
 
     (else (sex-error sex-form "unknown top level form" sex-form))))
 
+(define (process-includes sex-form includes acc)
+  ;; consume (include ...) form and add to acc
+  ;; (include <inc>) for each include
+  (let process ((includes includes)
+                (acc acc))
+    (if (null? includes)
+        acc
+        (process (cdr includes)
+                 (cons (copy-form-source! sex-form `(include ,(car includes)))
+                       acc)))))
+
 (define (process-imports module-public-forms acc)
   ;; consume (import ...) form and process imports so
   ;; data types end up in types db

tests/semen.scm

@@ -115,4 +115,17 @@
           (union t-doc-val ((i int) (f float))))
         (semen-process
          '((union t-doc-val "Either." ((i int) (f float))))))
+
+  ;; Includes
+  (test '((include stdio.h))
+        (semen-process
+         '((include stdio.h))))
+  (test '((include stdio.h)
+          (include stdlib.h))
+        (semen-process
+         '((include stdio.h
+                    stdlib.h))))
+  (test '()
+        (semen-process
+         '((include))))
 )