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fix warning for cast to pointer from integer of different size, enhance conditional check of pointer to 'if' test

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This commit is contained in:
Joseph Poirier 2015-06-14 17:27:41 -05:00
parent 62d1695632
commit 63cd9d074b
3 changed files with 24 additions and 1 deletions
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3
expression.c
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@ -769,8 +769,9 @@ void ExpressionPrefixOperator(struct ParseState *Parser,
(void*)((char*)TopValue->Val->Pointer-Size); (void*)((char*)TopValue->Val->Pointer-Size);
break; break;
case TokenUnaryNot: case TokenUnaryNot:
/* conditionally checking a pointer's value */
TopValue->Val->Pointer = TopValue->Val->Pointer =
(void*)((char*)(!TopValue->Val->Pointer)); (void*)((TopValue->Val->Pointer) ? NULL : (void*)1);
break; break;
default: default:
ProgramFail(Parser, "invalid operation"); ProgramFail(Parser, "invalid operation");

18
tests/14_if.c
View file

@ -13,5 +13,23 @@ if (b)
else else
printf("b is false\n"); printf("b is false\n");
int *c = 0;
if (c)
printf("c is true\n");
else
printf("c is false\n");
if (!c)
printf("c is true\n");
else
printf("c is false\n");
c = &b;
if (c)
printf("c is true\n");
else
printf("c is false\n");
if (!c)
printf("c is true\n");
else
printf("c is false\n");
void main() {} void main() {}

4
tests/14_if.expect
View file

@ -1,2 +1,6 @@
a is true a is true
b is false b is false
c is false
c is true
c is true
c is false