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Support most cases of sizeof applied to an expression

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Previously there was only support for `sizeof(<type>)` and expressions
which syntactically look like a type (such as `sizeof(foo)`).

Fixes #2091.
This commit is contained in:
Olly Betts 2022-01-25 23:47:01 +13:00
commit 7ab24e7e86
3 changed files with 46 additions and 0 deletions
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19
Source/CParse/parser.y
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@ -6554,6 +6554,25 @@ exprsimple : exprnum {
$$.val = NewStringf("sizeof...(%s)",SwigType_str($6,0));
$$.type = T_ULONG;
}
/* We don't support all valid expressions here currently - e.g.
* sizeof(<unaryop> x) doesn't work - but those are unlikely to
* be seen in real code.
*
* Note: sizeof(x) is not handled here, but instead by the rule
* for sizeof(<type>) because it matches that syntactically.
*/
| SIZEOF LPAREN exprsimple RPAREN {
$$.val = NewStringf("sizeof(%s)", $3.val);
$$.type = T_ULONG;
}
/* `sizeof expr` without parentheses is valid for an expression,
* but not for a type. This doesn't support `sizeof x` in
* addition to the case not supported above.
*/
| SIZEOF exprsimple {
$$.val = NewStringf("sizeof(%s)", $2.val);
$$.type = T_ULONG;
}
| wstring {
$$.val = $1;
$$.rawval = NewStringf("L\"%s\"", $$.val);