src/tint/lang/wgsl/ast/transform/single_entry_point.h

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#ifndef SRC_TINT_LANG_WGSL_AST_TRANSFORM_SINGLE_ENTRY_POINT_H_
#define SRC_TINT_LANG_WGSL_AST_TRANSFORM_SINGLE_ENTRY_POINT_H_

#include <string>

#include "src/tint/lang/wgsl/ast/transform/transform.h"

namespace tint::ast::transform {

/// Strip all but one entry point a module.
///
/// All module-scope variables, types, and functions that are not used by the
/// target entry point will also be removed.
class SingleEntryPoint final : public Castable<SingleEntryPoint, Transform> {
  public:
    /// Configuration options for the transform
    struct Config final : public Castable<Config, Data> {
        /// Constructor
        /// @param entry_point the name of the entry point to keep
        explicit Config(std::string entry_point = "");

        /// Copy constructor
        Config(const Config&);

        /// Destructor
        ~Config() override;

        /// Assignment operator
        /// @returns this Config
        Config& operator=(const Config&);

        /// The name of the entry point to keep.
        std::string entry_point_name;
    };

    /// Constructor
    SingleEntryPoint();

    /// Destructor
    ~SingleEntryPoint() override;

    /// @copydoc Transform::Apply
    ApplyResult Apply(const Program& program,
                      const DataMap& inputs,
                      DataMap& outputs) const override;
};

}  // namespace tint::ast::transform

#endif  // SRC_TINT_LANG_WGSL_AST_TRANSFORM_SINGLE_ENTRY_POINT_H_