gccrs: Implement compilation support for TuplePatternItems::RANGED #3863
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philberty
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Jul 1, 2025
Polygonalr
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gcc/rust/ChangeLog: * typecheck/rust-hir-type-check-pattern.cc (visit(TuplePattern)): Fix incorrect logic for field size checking. gcc/testsuite/ChangeLog: * rust/compile/tuple_mismatch.rs: Include RestPattern in test. Signed-off-by: Yap Zhi Heng <yapzhhg@gmail.com>
Example GIMPLE output of the match statement for match-restpattern-tuple-1.rs:
...
RUSTTMP.2 = x;
_1 = RUSTTMP.2.__0;
_2 = _1 == 1;
_3 = RUSTTMP.2.__3;
_4 = _3 == 4;
_5 = _2 & _4;
if (_5 != 0) goto <D.109>; else goto <D.110>;
<D.109>:
{
{
}
goto <D.104>;
}
<D.110>:
if (1 != 0) goto <D.111>; else goto <D.112>;
<D.111>:
{
{
}
goto <D.104>;
}
<D.112>:
<D.104>:
...
gcc/rust/ChangeLog:
* backend/rust-compile-pattern.cc (CompilePatternCheckExpr::visit(TuplePattern)):
Implement check expression compilation for TuplePatternItems::RANGED.
Signed-off-by: Yap Zhi Heng <yapzhhg@gmail.com>
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This is part of implementing support for RestPatterns, RestPattern support for slices will be next.
Includes a fix to my little oopsie made in my type-checking code, and test updates to ensure that the mistake will not repeat.