mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Jon Ross-Perkins
1497e1333d
This switches types to using SemanticsTypeId instead of SemanticsNodeId, and lowering pre-builds its list of types. The empty tuple type is special-cased because we don't want to emit it unless it's in-use, but as the implicit return for functions, it's frequently used. Callables use invalid to indicate the implicit return, and that seems undesirable to change due to the size increase.
124 lines
4.6 KiB
C++
124 lines
4.6 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/semantics/semantics_context.h"
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namespace Carbon {
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auto SemanticsHandleStructComma(SemanticsContext& context,
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ParseTree::Node /*parse_node*/) -> bool {
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context.ParamOrArgComma(
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/*for_args=*/context.parse_tree().node_kind(
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context.node_stack().PeekParseNode()) !=
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ParseNodeKind::StructFieldType);
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return true;
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}
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auto SemanticsHandleStructFieldDesignator(SemanticsContext& context,
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ParseTree::Node /*parse_node*/)
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-> bool {
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// This leaves the designated name on top because the `.` isn't interesting.
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CARBON_CHECK(
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context.parse_tree().node_kind(context.node_stack().PeekParseNode()) ==
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ParseNodeKind::DesignatedName);
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return true;
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}
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auto SemanticsHandleStructFieldType(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto [type_node, type_id] = context.node_stack().PopForParseNodeAndNodeId();
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SemanticsTypeId cast_type_id = context.ExpressionAsType(type_node, type_id);
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auto [name_node, name_id] = context.node_stack().PopForParseNodeAndNameId(
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ParseNodeKind::DesignatedName);
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context.AddNode(
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SemanticsNode::StructTypeField::Make(name_node, cast_type_id, name_id));
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context.node_stack().Push(parse_node);
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return true;
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}
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auto SemanticsHandleStructFieldUnknown(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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return context.TODO(parse_node, "HandleStructFieldUnknown");
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}
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auto SemanticsHandleStructFieldValue(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto [value_parse_node, value_node_id] =
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context.node_stack().PopForParseNodeAndNodeId();
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auto [_, name_id] = context.node_stack().PopForParseNodeAndNameId(
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ParseNodeKind::DesignatedName);
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// Store the name for the type.
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auto type_block_id = context.args_type_info_stack().PeekForAdd();
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context.semantics().AddNode(
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type_block_id,
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SemanticsNode::StructTypeField::Make(
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parse_node, context.semantics().GetNode(value_node_id).type_id(),
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name_id));
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// Push the value back on the stack as an argument.
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context.node_stack().Push(parse_node, value_node_id);
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return true;
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}
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auto SemanticsHandleStructLiteral(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto refs_id = context.ParamOrArgEnd(
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/*for_args=*/true, ParseNodeKind::StructLiteralOrStructTypeLiteralStart);
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context.PopScope();
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context.node_stack().PopAndDiscardSoloParseNode(
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ParseNodeKind::StructLiteralOrStructTypeLiteralStart);
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auto type_block_id = context.args_type_info_stack().Pop();
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// Construct a type for the literal.
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// TODO: This should try to canonicalize the struct form before adding the
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// node.
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auto refs = context.semantics().GetNodeBlock(refs_id);
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auto type_id =
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context.CanonicalizeType(context.AddNode(SemanticsNode::StructType::Make(
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parse_node, SemanticsTypeId::TypeType, type_block_id)));
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auto value_id = context.AddNode(
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SemanticsNode::StructValue::Make(parse_node, type_id, refs_id));
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context.node_stack().Push(parse_node, value_id);
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return true;
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}
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auto SemanticsHandleStructLiteralOrStructTypeLiteralStart(
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SemanticsContext& context, ParseTree::Node parse_node) -> bool {
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context.PushScope();
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context.node_stack().Push(parse_node);
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// At this point we aren't sure whether this will be a value or type literal,
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// so we push onto args irrespective. It just won't be used for a type
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// literal.
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context.args_type_info_stack().Push();
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context.ParamOrArgStart();
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return true;
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}
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auto SemanticsHandleStructTypeLiteral(SemanticsContext& context,
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ParseTree::Node parse_node) -> bool {
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auto refs_id = context.ParamOrArgEnd(
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/*for_args=*/false, ParseNodeKind::StructLiteralOrStructTypeLiteralStart);
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context.PopScope();
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context.node_stack().PopAndDiscardSoloParseNode(
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ParseNodeKind::StructLiteralOrStructTypeLiteralStart);
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// This is only used for value literals.
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context.args_type_info_stack().Pop();
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CARBON_CHECK(refs_id != SemanticsNodeBlockId::Empty)
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<< "{} is handled by StructLiteral.";
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auto type_id = context.AddNode(SemanticsNode::StructType::Make(
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parse_node, SemanticsTypeId::TypeType, refs_id));
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context.node_stack().Push(parse_node, type_id);
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return true;
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}
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} // namespace Carbon
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