mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 08:45:54 +01:00
Jon Ross-Perkins
4113ec8a67
Working on toolchain semantics: - SemanticsIR is set up as a container for the semantic tree. - SemanticsIRFactory builds the tree, with separate transformations for each ParseNodeKind. - ParseSubtreeConsumer is a helper for transforming a ParseTree::Node's children, managing size/nodes to prevent errors. - The nodes subdirectory contains SemanticIR nodes. - MetaNode is used to represent nodes which have "sub-classes": Statements, Declarations, and Expressions. - MetaNodeBlock is used to represent nodes which exist together in a block with name lookup: Statements and Declarations (not Expressions). This is traversing children first in order to address the RPO format of ParseTree. This means that when lists are formed, they're reversed to be in code-order (`FixReverseOrdering`). This is still very much incomplete -- the main intent at present is to demonstrate structure.
61 lines
1.9 KiB
C++
61 lines
1.9 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_NODES_FUNCTION_H_
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#define CARBON_TOOLCHAIN_SEMANTICS_NODES_FUNCTION_H_
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#include "common/ostream.h"
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#include "llvm/ADT/SmallVector.h"
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#include "toolchain/parser/parse_tree.h"
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#include "toolchain/semantics/meta_node.h"
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#include "toolchain/semantics/meta_node_block.h"
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#include "toolchain/semantics/nodes/declared_name.h"
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#include "toolchain/semantics/nodes/pattern_binding.h"
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namespace Carbon::Semantics {
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// Represents `fn name(params...) [-> return_expr] body`.
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class Function {
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public:
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static constexpr DeclarationKind MetaNodeKind = DeclarationKind::Function;
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Function(ParseTree::Node node, DeclaredName name,
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llvm::SmallVector<PatternBinding, 0> params,
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llvm::Optional<Semantics::Expression> return_expr,
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StatementBlock body)
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: node_(node),
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name_(name),
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params_(std::move(params)),
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return_expr_(return_expr),
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body_(std::move(body)) {}
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auto node() const -> ParseTree::Node { return node_; }
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auto name() const -> const DeclaredName& { return name_; }
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auto params() const -> llvm::ArrayRef<PatternBinding> { return params_; }
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auto return_expr() const -> llvm::Optional<Semantics::Expression> {
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return return_expr_;
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}
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auto body() const -> const StatementBlock& { return body_; }
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private:
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// The FunctionDeclaration node.
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ParseTree::Node node_;
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// The function's name.
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DeclaredName name_;
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// Regular function parameters.
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llvm::SmallVector<PatternBinding, 0> params_;
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// The return expression.
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llvm::Optional<Semantics::Expression> return_expr_;
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StatementBlock body_;
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};
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} // namespace Carbon::Semantics
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#endif // CARBON_TOOLCHAIN_SEMANTICS_NODES_FUNCTION_H_
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