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https://github.com/carbon-language/carbon-lang.git
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Jon Ross-Perkins
0755598fa8
As a step towards builtins, provide more blocks. The intent is that any significant scope change will become its own NodeBlock. Builtins should produce the first set of node blocks. Note, SemanticsIR as set up here isn't handling ordering of import processing -- I haven't thought that through much beyond that we probably want some lighter-weight processing of the parse tree to achieve it. But I think the essence of loading builtins first as their own IR block is... probably right?
84 lines
3.1 KiB
C++
84 lines
3.1 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 "common/check.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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const ParseTree& parse_tree,
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SemanticsIR& semantics)
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: tokens_(&tokens), parse_tree_(&parse_tree), semantics_(&semantics) {}
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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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struct TraversalStackEntry {
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ParseTree::Node parse_node;
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llvm::Optional<SemanticsNodeId> result_id;
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};
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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 onto the stack. Used when there is no IR generated by
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// the node.
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auto Push(ParseTree::Node parse_node) -> void;
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// Pushes a parse tree 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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// 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 HandleReturnStatement(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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// 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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// 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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