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#ifndef SRC_TINT_LANG_WGSL_COMMON_ALLOWED_FEATURES_H_
#define SRC_TINT_LANG_WGSL_COMMON_ALLOWED_FEATURES_H_

#include <unordered_set>

#include "src/tint/lang/wgsl/extension.h"
#include "src/tint/lang/wgsl/features/language_feature.h"
#include "src/tint/utils/reflection/reflection.h"

namespace tint::wgsl {

/// AllowedFeatures describes the set of extensions and language features that are allowed by the
/// current environment.
struct AllowedFeatures {
    /// The extensions that are allowed.
    std::unordered_set<wgsl::Extension> extensions;
    /// The language features that are allowed.
    std::unordered_set<wgsl::LanguageFeature> features;

    /// Helper to produce an AllowedFeatures object that allows all extensions and features.
    /// @returns the AllowedFeatures object
    static AllowedFeatures Everything() {
        AllowedFeatures allowed_features;

        // Allow all extensions.
        for (auto extension : wgsl::kAllExtensions) {
            allowed_features.extensions.insert(extension);
        }

        // Allow all language features.
        for (auto feature : wgsl::kAllLanguageFeatures) {
            allowed_features.features.insert(feature);
        }

        return allowed_features;
    }

    /// Reflect the fields of this class so that it can be used by tint::ForeachField().
    TINT_REFLECT(AllowedFeatures, extensions, features);
};

/// Ensure that all the fields of AllowedFeatures are reflected.
TINT_ASSERT_ALL_FIELDS_REFLECTED(AllowedFeatures);

}  // namespace tint::wgsl

#endif  // SRC_TINT_LANG_WGSL_COMMON_ALLOWED_FEATURES_H_