mirror of
https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
30960d11a9
This is just the declaration, without initialization. Partly breaking it out because I'm changing the placeholder builtin types. Might also need to separate out storage of the var from the name bind.
108 lines
4.0 KiB
C++
108 lines
4.0 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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#ifndef CARBON_TOOLCHAIN_SEMANTICS_SEMANTICS_PARSE_TREE_HANDLER_H_
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#define CARBON_TOOLCHAIN_SEMANTICS_SEMANTICS_PARSE_TREE_HANDLER_H_
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#include "toolchain/parser/parse_tree.h"
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#include "toolchain/semantics/semantics_ir.h"
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#include "toolchain/semantics/semantics_node.h"
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namespace Carbon {
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// Handles processing of a ParseTree for semantics.
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class SemanticsParseTreeHandler {
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public:
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// Stores references for work.
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explicit SemanticsParseTreeHandler(const TokenizedBuffer& tokens,
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TokenDiagnosticEmitter& emitter,
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const ParseTree& parse_tree,
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SemanticsIR& semantics,
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llvm::raw_ostream* vlog_stream)
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: tokens_(&tokens),
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emitter_(&emitter),
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parse_tree_(&parse_tree),
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semantics_(&semantics),
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vlog_stream_(vlog_stream) {}
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// Outputs the ParseTree information into SemanticsIR.
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auto Build() -> void;
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private:
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// Prints the node_stack_ on stack dumps.
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class PrettyStackTraceNodeStack;
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// Prints the node_block_stack_ on stack dumps.
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class PrettyStackTraceNodeBlockStack;
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struct TraversalStackEntry {
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ParseTree::Node parse_node;
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std::optional<SemanticsNodeId> result_id;
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};
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// Adds an identifier for a DeclaredName node, returning its reference.
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auto AddIdentifier(ParseTree::Node decl_node) -> SemanticsIdentifierId;
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// Adds a node to the current block, returning the produced ID.
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auto AddNode(SemanticsNode node) -> SemanticsNodeId;
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// Pushes a parse tree node onto the stack. Used when there is no IR generated
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// by the node.
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auto Push(ParseTree::Node parse_node) -> void;
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// Pushes a parse tree node onto the stack, storing the SemanticsNode as the
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// result.
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auto Push(ParseTree::Node parse_node, SemanticsNode node) -> void;
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// Pushes a parse tree node onto the stack with an already-built node ID.
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auto Push(ParseTree::Node parse_node, SemanticsNodeId node_id) -> void;
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// Pops the top of the stack, verifying that it's the expected kind.
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auto Pop(ParseNodeKind pop_parse_kind) -> void;
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// Pops the top of the stack, returning the result_id. Must only be called for
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// nodes that have results.
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auto PopWithResult() -> SemanticsNodeId;
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// Pops the top of the stack, verifying that it's the expected kind and
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// returning the result_id. Must only be called for nodes that have results.
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auto PopWithResult(ParseNodeKind pop_parse_kind) -> SemanticsNodeId;
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// Parse node handlers.
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auto HandleDeclaredName(ParseTree::Node parse_node) -> void;
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auto HandleFunctionDefinition(ParseTree::Node parse_node) -> void;
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auto HandleFunctionDefinitionStart(ParseTree::Node parse_node) -> void;
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auto HandleInfixOperator(ParseTree::Node parse_node) -> void;
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auto HandleLiteral(ParseTree::Node parse_node) -> void;
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auto HandleParameterList(ParseTree::Node parse_node) -> void;
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auto HandlePatternBinding(ParseTree::Node parse_node) -> void;
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auto HandleReturnStatement(ParseTree::Node parse_node) -> void;
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auto HandleVariableDeclaration(ParseTree::Node parse_node) -> void;
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// Tokens for getting data on literals.
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const TokenizedBuffer* tokens_;
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// Handles diagnostics.
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TokenDiagnosticEmitter* emitter_;
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// The file's parse tree.
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const ParseTree* parse_tree_;
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// The SemanticsIR being added to.
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SemanticsIR* semantics_;
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// Whether to print verbose output.
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llvm::raw_ostream* vlog_stream_;
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// The stack during Build. Will contain file-level parse nodes on return.
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llvm::SmallVector<TraversalStackEntry> node_stack_;
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// The stack of node blocks during build. Only updated on ParseTree nodes that
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// affect the stack.
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llvm::SmallVector<SemanticsNodeBlockId> node_block_stack_;
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};
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} // namespace Carbon
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#endif // CARBON_TOOLCHAIN_SEMANTICS_SEMANTICS_PARSE_TREE_HANDLER_H_
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