Fixed for loops of the form:

for (;;)

Fixes issue 93


git-svn-id: http://picoc.googlecode.com/svn/trunk@474 21eae674-98b7-11dd-bd71-f92a316d2d60

parse.c

@@ -334,7 +334,10 @@ void ParseFor(struct ParseState *Parser)
         ProgramFail(Parser, "statement expected");
     
     ParserCopyPos(&PreConditional, Parser);
-    Condition = ExpressionParseInt(Parser);
+    if (LexGetToken(Parser, NULL, FALSE) == TokenSemicolon)
+        Condition = TRUE;
+    else
+        Condition = ExpressionParseInt(Parser);
     
     if (LexGetToken(Parser, NULL, TRUE) != TokenSemicolon)
         ProgramFail(Parser, "';' expected");
@@ -360,7 +363,10 @@ void ParseFor(struct ParseState *Parser)
         ParseStatement(Parser, FALSE);
                         
         ParserCopyPos(Parser, &PreConditional);
-        Condition = ExpressionParseInt(Parser);
+        if (LexGetToken(Parser, NULL, FALSE) == TokenSemicolon)
+            Condition = TRUE;
+        else
+            Condition = ExpressionParseInt(Parser);
         
         if (Condition)
         {
@@ -555,7 +561,9 @@ enum ParseResult ParseStatement(struct ParseState *Parser, int CheckTrailingSemi
             CheckTrailingSemicolon = FALSE;
             break;
 
-        case TokenSemicolon: break;
+        case TokenSemicolon: 
+            CheckTrailingSemicolon = FALSE; 
+            break;
 
         case TokenIntType:
         case TokenShortType:

tests/45_empty_for.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main()
+{
+    int Count = 0;
+    
+    for (;;)
+    {
+        Count++;
+        printf("%d\n", Count);
+        if (Count >= 10)
+            break;
+    }
+    
+    return 0;
+}

tests/45_empty_for.expect

@@ -0,0 +1,10 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10

tests/Makefile

@@ -39,7 +39,8 @@ TESTS=	00_assignment.test \
 	40_stdio.test \
 	41_hashif.test \
 	43_void_param.test \
-	44_scoped_declarations.test
+	44_scoped_declarations.test \
+	45_empty_for.test
 
 %.test: %.expect %.c
 	@echo Test: $*...