mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 14:01:05 +01:00
Geoff RomerandJon Ross-Perkins
4f10735751
This change splits `NodeKind::IdentifierName` into separate node kinds depending on whether the identifier is followed by parameters, and similarly splits `NameQualifier` based on whether the qualifier has parameters. This enables us to only push a pattern block when it's actually needed, rather than "defensively" pushing one when it might be needed. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#include "toolchain/check/name_component.h"
|
|
|
|
#include "toolchain/check/context.h"
|
|
#include "toolchain/check/pattern_match.h"
|
|
|
|
namespace Carbon::Check {
|
|
|
|
auto PopNameComponent(Context& context, SemIR::InstId return_slot_pattern_id)
|
|
-> NameComponent {
|
|
Parse::NodeId first_param_node_id = Parse::InvalidNodeId();
|
|
Parse::NodeId last_param_node_id = Parse::InvalidNodeId();
|
|
|
|
// Explicit params.
|
|
auto [params_loc_id, param_patterns_id] =
|
|
context.node_stack().PopWithNodeIdIf<Parse::NodeKind::TuplePattern>();
|
|
if (param_patterns_id) {
|
|
first_param_node_id =
|
|
context.node_stack()
|
|
.PopForSoloNodeId<Parse::NodeKind::TuplePatternStart>();
|
|
last_param_node_id = params_loc_id;
|
|
} else {
|
|
param_patterns_id = SemIR::InstBlockId::Invalid;
|
|
}
|
|
|
|
// Implicit params.
|
|
auto [implicit_params_loc_id, implicit_param_patterns_id] =
|
|
context.node_stack()
|
|
.PopWithNodeIdIf<Parse::NodeKind::ImplicitParamList>();
|
|
if (implicit_param_patterns_id) {
|
|
// Implicit params always come before explicit params.
|
|
first_param_node_id =
|
|
context.node_stack()
|
|
.PopForSoloNodeId<Parse::NodeKind::ImplicitParamListStart>();
|
|
// Only use the end of implicit params if there weren't explicit params.
|
|
if (last_param_node_id.is_valid()) {
|
|
last_param_node_id = params_loc_id;
|
|
}
|
|
} else {
|
|
implicit_param_patterns_id = SemIR::InstBlockId::Invalid;
|
|
}
|
|
|
|
auto call_params_id = SemIR::InstBlockId::Invalid;
|
|
auto pattern_block_id = SemIR::InstBlockId::Invalid;
|
|
if (param_patterns_id->is_valid() || implicit_param_patterns_id->is_valid()) {
|
|
call_params_id =
|
|
CalleePatternMatch(context, *implicit_param_patterns_id,
|
|
*param_patterns_id, return_slot_pattern_id);
|
|
pattern_block_id = context.pattern_block_stack().Pop();
|
|
}
|
|
|
|
auto [name_loc_id, name_id] =
|
|
context.node_stack()
|
|
.PopWithNodeId<Parse::NodeCategory::NonExprIdentifierName>();
|
|
|
|
return {
|
|
.name_loc_id = name_loc_id,
|
|
.name_id = name_id,
|
|
.first_param_node_id = first_param_node_id,
|
|
.last_param_node_id = last_param_node_id,
|
|
.implicit_params_loc_id = implicit_params_loc_id,
|
|
.implicit_param_patterns_id = *implicit_param_patterns_id,
|
|
.params_loc_id = params_loc_id,
|
|
.param_patterns_id = *param_patterns_id,
|
|
.call_params_id = call_params_id,
|
|
.return_slot_pattern_id = return_slot_pattern_id,
|
|
.pattern_block_id = pattern_block_id,
|
|
};
|
|
}
|
|
|
|
// Pop the name of a declaration from the node stack, and diagnose if it has
|
|
// parameters.
|
|
auto PopNameComponentWithoutParams(Context& context, Lex::TokenKind introducer)
|
|
-> NameComponent {
|
|
NameComponent name = PopNameComponent(context);
|
|
if (name.call_params_id.is_valid()) {
|
|
CARBON_DIAGNOSTIC(UnexpectedDeclNameParams, Error,
|
|
"`{0}` declaration cannot have parameters",
|
|
Lex::TokenKind);
|
|
// Point to the lexically first parameter list in the diagnostic.
|
|
context.emitter().Emit(name.implicit_param_patterns_id.is_valid()
|
|
? name.implicit_params_loc_id
|
|
: name.params_loc_id,
|
|
UnexpectedDeclNameParams, introducer);
|
|
|
|
name.call_params_id = SemIR::InstBlockId::Invalid;
|
|
}
|
|
return name;
|
|
}
|
|
|
|
} // namespace Carbon::Check
|