mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jon Ross-Perkins
db022658c6
Note this isn't implementing checking through imports. The parse node there is harder to access through the context, so would require examining the entity in order to get the import declaration, to get at the ImportIR. We also don't have a parse tree attached in that case, and would need to add one to SemIR::File. But I believe we do want to add that, so it's explicitly a TODO. Note GetTokenText re-lexes literal values, so there's a bit of potential overhead there. Not sure if we want a more efficient manner for comparing in cases like this.
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "toolchain/check/name_component.h"
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#include "toolchain/check/context.h"
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namespace Carbon::Check {
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auto PopNameComponent(Context& context) -> NameComponent {
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Parse::NodeId first_param_node_id = Parse::InvalidNodeId();
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Parse::NodeId last_param_node_id = Parse::InvalidNodeId();
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// Explicit params.
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auto [params_loc_id, params_id] =
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context.node_stack().PopWithNodeIdIf<Parse::NodeKind::TuplePattern>();
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if (params_id) {
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first_param_node_id =
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context.node_stack()
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.PopForSoloNodeId<Parse::NodeKind::TuplePatternStart>();
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last_param_node_id = params_loc_id;
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}
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// Implicit params.
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auto [implicit_params_loc_id, implicit_params_id] =
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context.node_stack()
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.PopWithNodeIdIf<Parse::NodeKind::ImplicitParamList>();
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if (implicit_params_id) {
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// Implicit params always come before explicit params.
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first_param_node_id =
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context.node_stack()
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.PopForSoloNodeId<Parse::NodeKind::ImplicitParamListStart>();
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// Only use the end of implicit params if there weren't explicit params.
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if (last_param_node_id.is_valid()) {
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last_param_node_id = params_loc_id;
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}
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}
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auto [name_loc_id, name_id] = context.node_stack().PopNameWithNodeId();
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return {
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.name_loc_id = name_loc_id,
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.name_id = name_id,
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.first_param_node_id = first_param_node_id,
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.last_param_node_id = last_param_node_id,
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.implicit_params_loc_id = implicit_params_loc_id,
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.implicit_params_id =
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implicit_params_id.value_or(SemIR::InstBlockId::Invalid),
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.params_loc_id = params_loc_id,
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.params_id = params_id.value_or(SemIR::InstBlockId::Invalid),
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};
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}
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// Pop the name of a declaration from the node stack, and diagnose if it has
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// parameters.
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auto PopNameComponentWithoutParams(Context& context, Lex::TokenKind introducer)
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-> NameComponent {
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NameComponent name = PopNameComponent(context);
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if (name.implicit_params_id.is_valid() || name.params_id.is_valid()) {
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CARBON_DIAGNOSTIC(UnexpectedDeclNameParams, Error,
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"`{0}` declaration cannot have parameters.",
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Lex::TokenKind);
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// Point to the lexically first parameter list in the diagnostic.
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context.emitter().Emit(name.implicit_params_id.is_valid()
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? name.implicit_params_loc_id
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: name.params_loc_id,
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UnexpectedDeclNameParams, introducer);
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name.implicit_params_id = SemIR::InstBlockId::Invalid;
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name.params_id = SemIR::InstBlockId::Invalid;
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}
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return name;
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}
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} // namespace Carbon::Check
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