From ec2e54a2977ff30e51eee15f464e52dc1e8390ab Mon Sep 17 00:00:00 2001
From: Shagun Agrawal <agrawalshagun07@gmail.com>
Date: Wed, 31 Jul 2024 23:48:08 +0530
Subject: Add multiple statements to function

---
 src/cljcc/parser.clj | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/cljcc/parser.clj b/src/cljcc/parser.clj
index 77482f1..d19ddd1 100644
--- a/src/cljcc/parser.clj
+++ b/src/cljcc/parser.clj
@@ -6,12 +6,15 @@
   (insta/parser
    "whitespace = #'\\s+'"))
 
+(declare parse)
+
 (def c-parser
   (insta/parser
    "<program> = function+
-    function = #'int\\b' identifier <'('> #'void\\b' <')'> <'{'> statement <'}'>
+    function = #'int\\b' identifier <'('> #'void\\b' <')'> <'{'> statement+ <'}'>
     statement = #'return\\b' exp <';'>
-    exp = constant | unop exp | <'('> exp <')'>
+    exp = exp-prime
+    <exp-prime> = constant | unop exp-prime | <'('> exp-prime <')'>
     unop = #'-' | #'~'
     identifier = #'[a-zA-Z_]\\w*\\b'
     constant = #'[0-9]+\\b'
@@ -25,10 +28,22 @@
   (c-parser source))
 
 (comment
+
  (parse "int main(void) {return 2;}")
 
+ (parse "
+  int main(void) {
+  return 2;
+  return 2;
+  }")
+
+ (parse "int main(void) {
+   return -(((((10)))));
+   }")
+
  (parse "int main(void) {
-return -(((((10)))));
-}")
+   return --2;
+   return -(((((10)))));
+   }")
 
  ,)
-- 
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