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Fix spaceship operator bugs, document, add tests

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Remove some erroneously added brackets_increment() calls.

Reject <=> in preprocessor expressions with a clear error message (it
seems it isn't supported here - clang and gcc don't at least).

The type returned by `<=>` is not `bool`.  We pretend it's
`int` for now, which should work for how it's likely to be used
in constant expressions.

Fixes #1622
This commit is contained in:
Olly Betts 2022-03-09 10:08:17 +13:00
commit 02b4bd8eca
10 changed files with 91 additions and 7 deletions
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5
Source/Swig/scanner.c
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@ -895,17 +895,14 @@ static int look(Scanner *s) {
state = 240;
else if (c == '=') {
if ((c = nextchar(s)) == 0) {
brackets_increment(s);
return SWIG_TOKEN_LTEQUAL;
} else if (c == '>') { /* Spaceship operator */
return SWIG_TOKEN_LTEQUALGT;
} else {
retract(s, 1);
brackets_increment(s);
return SWIG_TOKEN_LTEQUAL;
}
}
else {
} else {
retract(s, 1);
brackets_increment(s);
return SWIG_TOKEN_LESSTHAN;