Home
cc1: Reduce to unary for sizeof expressions - scc - simple c99 compiler
HTML git clone git://git.simple-cc.org/scc
DIR Log
DIR Files
DIR Refs
DIR Submodules
DIR README
DIR LICENSE
---
DIR commit 4a0c2ccd2a49423967a9f0826bdfc012739327c7
DIR parent eb8960812d92714eb568df36e09d8c76af5cd46c
HTML Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date: Mon, 7 Oct 2024 17:15:05 +0200
cc1: Reduce to unary for sizeof expressions
The grammar is clear and sizeof applies to a unary expression,
but the code was reducing to a cast expression, creating problems
with expresions like:
sizeof "hello" - 1
or accepting invalid expressions like:
sizeof (char *) 3
Diffstat:
M src/cmd/cc/cc1/expr.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
---
DIR diff --git a/src/cmd/cc/cc1/expr.c b/src/cmd/cc/cc1/expr.c
@@ -843,7 +843,7 @@ typeof(Node *np)
return tp;
}
-static Node *cast(void);
+static Node *unary(void), *cast(void);
static Type *
sizeexp(void)
@@ -851,7 +851,7 @@ sizeexp(void)
Type *tp;
if (!accept('('))
- return typeof(cast());
+ return typeof(unary());
switch (yytoken) {
case TYPE:
@@ -859,7 +859,7 @@ sizeexp(void)
tp = typename();
break;
default:
- tp = typeof(cast());
+ tp = typeof(unary());
break;
}
expect(')');