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https://github.com/carbon-language/carbon-lang.git
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Geoff RomerandJon Ross-Perkins
4f816dd03f
This introduces `calling_convention_param_ids`, a single block that consolidates all the information that was being used by consumers of `param_refs` and `implicit_param_refs`, in a form that's easier to produce and typically easier to consume. See also [this Discord discussion](https://discord.com/channels/655572317891461132/655578254970716160/1300545448909738125) regarding the decision to keep the return slot last in the SemIR calling convention, even though it goes first in the LLVM calling convention. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
88 lines
3.2 KiB
C++
88 lines
3.2 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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#include "toolchain/check/pattern_match.h"
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namespace Carbon::Check {
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auto PopNameComponent(Context& context, SemIR::InstId return_slot_pattern_id)
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-> 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, param_patterns_id] =
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context.node_stack().PopWithNodeIdIf<Parse::NodeKind::TuplePattern>();
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if (param_patterns_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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} else {
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param_patterns_id = SemIR::InstBlockId::Invalid;
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}
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// Implicit params.
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auto [implicit_params_loc_id, implicit_param_patterns_id] =
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context.node_stack()
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.PopWithNodeIdIf<Parse::NodeKind::ImplicitParamList>();
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if (implicit_param_patterns_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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} else {
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implicit_param_patterns_id = SemIR::InstBlockId::Invalid;
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}
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auto [call_params_id, return_slot_id] =
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CalleePatternMatch(context, *implicit_param_patterns_id,
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*param_patterns_id, return_slot_pattern_id);
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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_param_patterns_id = *implicit_param_patterns_id,
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.params_loc_id = params_loc_id,
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.param_patterns_id = *param_patterns_id,
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.call_params_id = call_params_id,
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.return_slot_pattern_id = return_slot_pattern_id,
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.return_slot_id = return_slot_id,
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.pattern_block_id = context.pattern_block_stack().Pop(),
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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.call_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_param_patterns_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.call_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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