src/tint/lang/core/ir/exit_switch.h

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#ifndef SRC_TINT_LANG_CORE_IR_EXIT_SWITCH_H_
#define SRC_TINT_LANG_CORE_IR_EXIT_SWITCH_H_

#include <string>

#include "src/tint/lang/core/ir/exit.h"
#include "src/tint/utils/rtti/castable.h"

// Forward declarations
namespace tint::core::ir {
class Switch;
}  // namespace tint::core::ir

namespace tint::core::ir {

/// A exit switch instruction.
class ExitSwitch final : public Castable<ExitSwitch, Exit> {
  public:
    /// The base offset in Operands() for the args
    static constexpr size_t kArgsOperandOffset = 0;

    /// Constructor (no operands, no switch)
    /// @param id the instruction id
    explicit ExitSwitch(Id id);

    /// Constructor
    /// @param id the instruction id
    /// @param sw the switch being exited
    /// @param args the target MultiInBlock arguments
    ExitSwitch(Id id, ir::Switch* sw, VectorRef<Value*> args = tint::Empty);

    ~ExitSwitch() override;

    /// @copydoc Instruction::Clone()
    ExitSwitch* Clone(CloneContext& ctx) override;

    /// Re-associates the exit with the given switch instruction
    /// @param s the new switch to exit from
    void SetSwitch(ir::Switch* s);

    /// @returns the switch being exited
    ir::Switch* Switch();

    /// @returns the switch being exited
    const ir::Switch* Switch() const;

    /// @returns the friendly name for the instruction
    std::string FriendlyName() const override { return "exit_switch"; }
};

}  // namespace tint::core::ir

#endif  // SRC_TINT_LANG_CORE_IR_EXIT_SWITCH_H_