On 1/17/24 16:15, grischka wrote:
On 15.01.2024 00:34, Brad Robinson via Tinycc-devel wrote:
Hey All,
First post here. Firstly, thank you all for your work on this
project. I discovered tcc just a month or so ago and really enjoying
using it as a back-end code generator for a custom scripting language
I'm working on.
Anyway, I noticed this small bug:
A variable declaration as the first statement in a switch case block
fails when it shouldn't:
case 1:
int z = 123; // This fails with "identifier
expected"
break;
Hi,
well, yes, no. As a fact, a variable declaration is not a
statement.
There's a pretty easy workaround, just insert an empty statement before.
case 1:
; // This fixes it
int z = 123;
break;
Yes, label before statement is allowed, also label before empty
statement, just not label before no statement.
As for example "label: }" is not allowed either (in the theory).
See also what gcc has to say:
test.c: In function 'main':
test.c:7:23: error: a label can only be part of a statement and a
declaration is not a statement
switch(a) case 1: int z;
^~~
Which of course if a lot better than just "identifier expected"
I would agree that far.
That depends on the version of gcc / clang.
Gcc 13.2.1 prints no error.
Clang 17.0.6 prints "error: expected expression"
Clang 18.0.0(not released yet) prints "warning: label followed by a
declaration is a C23 extension [-Wc23-extensions]"
I probably should have mentioned it when committing the fix.
Herman
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