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dce63f5717
For fewer heap allocations, faster lookups. Change-Id: I02da7c1a63608096ec898b0d89f9f97c6db8733f Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/98141 Commit-Queue: Ben Clayton <bclayton@google.com> Reviewed-by: Dan Sinclair <dsinclair@chromium.org> Kokoro: Kokoro <noreply+kokoro@google.com>
65 lines
2.4 KiB
C++
65 lines
2.4 KiB
C++
// Copyright 2021 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_TINT_RESOLVER_DEPENDENCY_GRAPH_H_
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#define SRC_TINT_RESOLVER_DEPENDENCY_GRAPH_H_
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#include <unordered_map>
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#include <vector>
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#include "src/tint/ast/module.h"
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#include "src/tint/diagnostic/diagnostic.h"
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namespace tint::resolver {
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/// DependencyGraph holds information about module-scope declaration dependency
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/// analysis and symbol resolutions.
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struct DependencyGraph {
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/// Constructor
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DependencyGraph();
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/// Move-constructor
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DependencyGraph(DependencyGraph&&);
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/// Destructor
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~DependencyGraph();
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/// Build() performs symbol resolution and dependency analysis on `module`,
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/// populating `output` with the resulting dependency graph.
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/// @param module the AST module to analyse
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/// @param symbols the symbol table
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/// @param diagnostics the diagnostic list to populate with errors / warnings
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/// @param output the resulting DependencyGraph
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/// @returns true on success, false on error
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static bool Build(const ast::Module& module,
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const SymbolTable& symbols,
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diag::List& diagnostics,
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DependencyGraph& output);
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/// All globals in dependency-sorted order.
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utils::Vector<const ast::Node*, 32> ordered_globals;
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/// Map of ast::IdentifierExpression or ast::TypeName to a type, function, or
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/// variable that declares the symbol.
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std::unordered_map<const ast::Node*, const ast::Node*> resolved_symbols;
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/// Map of ast::Variable to a type, function, or variable that is shadowed by
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/// the variable key. A declaration (X) shadows another (Y) if X and Y use
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/// the same symbol, and X is declared in a sub-scope of the scope that
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/// declares Y.
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std::unordered_map<const ast::Variable*, const ast::Node*> shadows;
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};
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} // namespace tint::resolver
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#endif // SRC_TINT_RESOLVER_DEPENDENCY_GRAPH_H_
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