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72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef TOOLS_GN_CONFIG_H_
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#define TOOLS_GN_CONFIG_H_
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#include <set>
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#include "base/logging.h"
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#include "base/macros.h"
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#include "tools/gn/config_values.h"
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#include "tools/gn/item.h"
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#include "tools/gn/label_ptr.h"
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#include "tools/gn/unique_vector.h"
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// Represents a named config in the dependency graph.
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//
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// A config can list other configs. We track both the data assigned directly
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// on the config, this list of sub-configs, and (when the config is resolved)
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// the resulting values of everything merged together. The flatten step
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// means we can avoid doing a recursive config walk for every target to compute
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// flags.
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class Config : public Item {
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public:
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// We track the set of build files that may affect this config, please refer
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// to Scope for how this is determined.
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Config(const Settings* settings,
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const Label& label,
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const std::set<SourceFile>& build_dependency_files = {});
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~Config() override;
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// Item implementation.
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Config* AsConfig() override;
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const Config* AsConfig() const override;
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bool OnResolved(Err* err) override;
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// The values set directly on this config. This will not contain data from
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// sub-configs.
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ConfigValues& own_values() { return own_values_; }
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const ConfigValues& own_values() const { return own_values_; }
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// The values that represent this config and all sub-configs combined into
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// one. This is only valid after the config is resolved (when we know the
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// contents of the sub-configs).
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const ConfigValues& resolved_values() const {
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DCHECK(resolved_);
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if (configs_.empty()) // No sub configs, just use the regular values.
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return own_values_;
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return composite_values_;
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}
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// List of sub-configs.
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const UniqueVector<LabelConfigPair>& configs() const { return configs_; }
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UniqueVector<LabelConfigPair>& configs() { return configs_; }
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private:
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ConfigValues own_values_;
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// Contains the own_values combined with sub-configs. Most configs don't have
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// sub-configs. So as an optimization, this is not populated if there are no
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// items in configs_. The resolved_values() getter handles this.
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bool resolved_;
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ConfigValues composite_values_;
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UniqueVector<LabelConfigPair> configs_;
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DISALLOW_COPY_AND_ASSIGN(Config);
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};
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#endif // TOOLS_GN_CONFIG_H_
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