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// Copyright 2022 The Dawn & Tint Authors
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#ifndef SRC_TINT_LANG_CORE_IR_MULTI_IN_BLOCK_H_
#define SRC_TINT_LANG_CORE_IR_MULTI_IN_BLOCK_H_
#include <utility>
#include "src/tint/lang/core/ir/block.h"
#include "src/tint/lang/core/ir/block_param.h"
namespace tint::core::ir {
/// A block that can be the target of multiple branches.
/// MultiInBlocks maintain a list of inbound branches and a number of BlockParam parameters, used to
/// pass values from the branch source to this target.
class MultiInBlock : public Castable<MultiInBlock, Block> {
public:
/// Constructor
MultiInBlock();
~MultiInBlock() override;
/// @copydoc Block::Clone()
MultiInBlock* Clone(CloneContext& ctx) override;
/// @copydoc Block::CloneInto()
void CloneInto(CloneContext& ctx, Block* out) override;
/// Sets the params to the block
/// @param params the params for the block
void SetParams(VectorRef<BlockParam*> params);
/// Sets the params to the block
/// @param params the params for the block
void SetParams(std::initializer_list<BlockParam*> params);
/// @returns the params to the block
VectorRef<BlockParam*> Params() { return params_; }
/// @returns the params to the block
VectorRef<const BlockParam*> Params() const { return params_; }
/// @returns branches made to this block by sibling blocks
const VectorRef<ir::Terminator*> InboundSiblingBranches() { return inbound_sibling_branches_; }
/// Adds the given branch to the list of branches made to this block by sibling blocks
/// @param branch the branch to add
void AddInboundSiblingBranch(ir::Terminator* branch);
/// Removes the given branch to the list of branches made to this block by sibling blocks
/// @param branch the branch to remove
void RemoveInboundSiblingBranch(ir::Terminator* branch);
private:
Vector<BlockParam*, 2> params_;
Vector<ir::Terminator*, 2> inbound_sibling_branches_;
};
} // namespace tint::core::ir
#endif // SRC_TINT_LANG_CORE_IR_MULTI_IN_BLOCK_H_