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// Copyright 2023 The Dawn & Tint Authors
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#ifndef SRC_TINT_LANG_WGSL_AST_REQUIRES_H_
#define SRC_TINT_LANG_WGSL_AST_REQUIRES_H_
#include <string>
#include <utility>
#include <vector>
#include "src/tint/lang/wgsl/ast/node.h"
#include "src/tint/lang/wgsl/features/language_feature.h"
#include "src/tint/utils/containers/unique_vector.h"
namespace tint::ast {
/// A "requires" directive. Example:
/// ```
/// // Require a language feature named "foo"
/// requires foo;
/// ```
class Requires final : public Castable<Requires, Node> {
public:
/// A unique list of WGSL language features
using LanguageFeatures = UniqueVector<wgsl::LanguageFeature, 4>;
/// Create a requires directive
/// @param pid the identifier of the program that owns this node
/// @param nid the unique node identifier
/// @param src the source of this node
/// @param feats the language features being required by this directive
Requires(GenerationID pid, NodeID nid, const Source& src, LanguageFeatures feats);
/// Destructor
~Requires() override;
/// Clones this node and all transitive child nodes using the `CloneContext` `ctx`.
/// @param ctx the clone context
/// @return the newly cloned node
const Requires* Clone(CloneContext& ctx) const override;
/// The features being required by this directive.
const LanguageFeatures features;
};
} // namespace tint::ast
#endif // SRC_TINT_LANG_WGSL_AST_REQUIRES_H_