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Clean up handling of Call params (#5061)

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- Explicitly document that `*Param` and `*ParamPattern` insts represent
`Call` parameters.
- Stop wrapping compile-time parameter patterns in `ValueParamPattern`
insts (because they aren't `Call` parameters).
- Document how `MatchContext::results_` relates to the `Call`
parameters, and be more consistent about when it's written to.
- Remove `RuntimeParamIndex::Unknown`: we no longer need to distinguish
"this `Param`'s runtime index is unknown" from "this `Param` isn't a
runtime param", because we no longer use `Param`s at all in the latter
case.
- Rename `RuntimeParamIndex` to `CallParamIndex`.

As a side effect of removing the `ValueParamPattern` insts, this fixes a
minor diagnostic bug where `NoteInitializingParam` didn't identify the
specific parameter that led to a deduction failure, because it expects
generic parameters to only be represented by `SymbolicBindingPattern`s,
but before this change they could be wrapped in `ValueParamPattern`s.
This commit is contained in:
Geoff Romer
2025-03-04 21:01:59 +00:00
committed by GitHub
parent 4e21c0c1fc
commit d264f14027
148 changed files with 1424 additions and 2410 deletions
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toolchain/check/handle_impl.cpp
+17 -16
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@@ -228,22 +228,23 @@ static auto PopImplIntroducerAndParamsAsNameComponent(
Parse::Tree::PostorderIterator last_param_iter(end_of_decl_node_id);
--last_param_iter;
return {
.name_loc_id = Parse::NodeId::None,
.name_id = SemIR::NameId::None,
.first_param_node_id = first_param_node_id,
.last_param_node_id = *last_param_iter,
.implicit_params_loc_id = implicit_params_loc_id,
.implicit_param_patterns_id =
implicit_param_patterns_id.value_or(SemIR::InstBlockId::None),
.params_loc_id = Parse::NodeId::None,
.param_patterns_id = SemIR::InstBlockId::None,
.call_params_id = SemIR::InstBlockId::None,
.return_slot_pattern_id = SemIR::InstId::None,
.pattern_block_id = implicit_param_patterns_id
? context.pattern_block_stack().Pop()
: SemIR::InstBlockId::None,
};
auto pattern_block_id = SemIR::InstBlockId::None;
if (implicit_param_patterns_id) {
pattern_block_id = context.pattern_block_stack().Pop();
context.full_pattern_stack().PopFullPattern();
}
return {.name_loc_id = Parse::NodeId::None,
.name_id = SemIR::NameId::None,
.first_param_node_id = first_param_node_id,
.last_param_node_id = *last_param_iter,
.implicit_params_loc_id = implicit_params_loc_id,
.implicit_param_patterns_id =
implicit_param_patterns_id.value_or(SemIR::InstBlockId::None),
.params_loc_id = Parse::NodeId::None,
.param_patterns_id = SemIR::InstBlockId::None,
.call_params_id = SemIR::InstBlockId::None,
.return_slot_pattern_id = SemIR::InstId::None,
.pattern_block_id = pattern_block_id};
}
static auto MergeImplRedecl(Context& context, SemIR::Impl& new_impl,