From df51b2bb52628d48bb6822ead13a7cc9c84b89b5 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Fri, 7 May 2021 11:41:11 +0530
Subject: fix assignment exprs

---
 12/input  | 11 +++++++++--
 12/main.l |  5 +++++
 12/main.y |  9 ++++-----
 3 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/12/input b/12/input
index fa64ab2..b35b023 100644
--- a/12/input
+++ b/12/input
@@ -1,6 +1,13 @@
 int main(int a, int b, int c) {
     if (a > b) {
-        for(;;);
-        a++;
+        int i = 1;
+        float j = 2;
+    } else if (a < b) {
+        b++;
+        while(a > b) {
+            a++;
+        }
+    } else {
+        c++;
     }
 }
diff --git a/12/main.l b/12/main.l
index 2fa1b44..5641fad 100644
--- a/12/main.l
+++ b/12/main.l
@@ -12,6 +12,7 @@ extern int yylval;
 "long" return LONG;
 "return" return RET;
 "for" return FOR;
+"while" return WHILE;
 "if" return IF;
 "else" return ELSE;
 "," return COMMA;
@@ -33,6 +34,10 @@ extern int yylval;
 ">" return GT;
 "<=" return LTE;
 ">=" return GTE;
+[0-9]+ {
+    yylval = atoi(yytext);
+    return NUM;
+};
 [a-zA-Z_][a-zA-Z_0-9]* return ID;
 . ;
 \n ;
diff --git a/12/main.y b/12/main.y
index 5431c55..319b2d9 100644
--- a/12/main.y
+++ b/12/main.y
@@ -58,8 +58,8 @@ boolean_expr: unary_expr LT unary_expr
             | unary_expr NEQ unary_expr
             ;
 
-assignment_expr: unary_expr ASSIGN unary_expr
-               | unary_expr ASSIGN boolean_expr
+assignment_expr: argument ASSIGN unary_expr
+               | argument ASSIGN boolean_expr
                ;
 
 expression: unary_expr
@@ -67,12 +67,11 @@ expression: unary_expr
           | assignment_expr
           ;
 
-for_expr: FOR LPAREN statement statement expression RPAREN statement
-        | FOR LPAREN statement statement RPAREN statement
+for_expr: FOR LPAREN statement statement expression RPAREN block
+        | FOR LPAREN statement statement RPAREN block
         ;
 
 while_expr: WHILE LPAREN expression RPAREN block
-          | WHILE LPAREN RPAREN block
           ;
 
 if_expr: IF LPAREN expression RPAREN block
-- 
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