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/* -*- c++ -*- */
/*
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#pragma once
#ifndef IR_VISITOR_H
#define IR_VISITOR_H
#ifdef __cplusplus
/**
* Abstract base class of visitors of IR instruction trees
*/
class ir_visitor {
public:
virtual ~ir_visitor()
{
/* empty */
}
/**
* \name Visit methods
*
* As typical for the visitor pattern, there must be one \c visit method for
* each concrete subclass of \c ir_instruction. Virtual base classes within
* the hierarchy should not have \c visit methods.
*/
/*@{*/
virtual void visit(class ir_rvalue *) { assert(!"unhandled error_type"); }
virtual void visit(class ir_variable *) = 0;
virtual void visit(class ir_function_signature *) = 0;
virtual void visit(class ir_function *) = 0;
virtual void visit(class ir_expression *) = 0;
virtual void visit(class ir_texture *) = 0;
virtual void visit(class ir_swizzle *) = 0;
virtual void visit(class ir_dereference_variable *) = 0;
virtual void visit(class ir_dereference_array *) = 0;
virtual void visit(class ir_dereference_record *) = 0;
virtual void visit(class ir_assignment *) = 0;
virtual void visit(class ir_constant *) = 0;
virtual void visit(class ir_call *) = 0;
virtual void visit(class ir_return *) = 0;
virtual void visit(class ir_discard *) = 0;
virtual void visit(class ir_if *) = 0;
virtual void visit(class ir_loop *) = 0;
virtual void visit(class ir_loop_jump *) = 0;
virtual void visit(class ir_emit_vertex *) = 0;
virtual void visit(class ir_end_primitive *) = 0;
virtual void visit(class ir_barrier *) = 0;
/*@}*/
};
/* NOTE: function calls may never return due to discards inside them
* This is usually not an issue, but if it is, keep it in mind
*/
class ir_control_flow_visitor : public ir_visitor {
public:
virtual void visit(class ir_variable *) {}
virtual void visit(class ir_expression *) {}
virtual void visit(class ir_texture *) {}
virtual void visit(class ir_swizzle *) {}
virtual void visit(class ir_dereference_variable *) {}
virtual void visit(class ir_dereference_array *) {}
virtual void visit(class ir_dereference_record *) {}
virtual void visit(class ir_assignment *) {}
virtual void visit(class ir_constant *) {}
virtual void visit(class ir_call *) {}
virtual void visit(class ir_emit_vertex *) {}
virtual void visit(class ir_end_primitive *) {}
virtual void visit(class ir_barrier *) {}
};
#endif /* __cplusplus */
#endif /* IR_VISITOR_H */
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