119 lines
3.2 KiB
C++
119 lines
3.2 KiB
C++
/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file parameterRemap.cxx
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* @author drose
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* @date 2000-08-01
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*/
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#include "parameterRemap.h"
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using std::string;
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/**
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*
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*/
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ParameterRemap::
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~ParameterRemap() {
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}
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/**
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* Outputs an expression that converts the indicated variable from the
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* original type to the new type, for passing into the actual C++ function.
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*/
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void ParameterRemap::
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pass_parameter(std::ostream &out, const string &variable_name) {
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out << variable_name;
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}
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/**
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* This will be called immediately before get_return_expr(). It outputs
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* whatever lines the remapper needs to the function to set up its return
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* value, e.g. to declare a temporary variable or something. It should
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* return the modified expression.
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*/
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string ParameterRemap::
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prepare_return_expr(std::ostream &, int, const string &expression) {
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return expression;
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}
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/**
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* Returns an expression that evalutes to the appropriate value type for
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* returning from the function, given an expression of the original type.
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*/
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string ParameterRemap::
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get_return_expr(const string &expression) {
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return expression;
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}
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/**
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* Returns the string that converts the expression stored in the indicated
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* temporary variable to the appropriate return value type. This is normally
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* a pass-through, but in cases when the temporary variable type must be
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* different than the return type (i.e. get_temporary_type() !=
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* get_new_type()), this might perform some operation.
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*/
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string ParameterRemap::
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temporary_to_return(const string &temporary) {
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return temporary;
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}
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/**
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* Returns true if the return value represents a value that was newly
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* allocated, and hence must be explicitly deallocated later by the caller.
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*/
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bool ParameterRemap::
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return_value_needs_management() {
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return false;
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}
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/**
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* If return_value_needs_management() returns true, this should return the
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* index of the function that should be called when it is time to destruct the
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* return value. It will generally be the same as the destructor for the
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* class we just returned a pointer to.
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*/
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FunctionIndex ParameterRemap::
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get_return_value_destructor() {
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return 0;
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}
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/**
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* This is a hack around a problem VC++ has with overly-complex expressions,
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* particularly in conjunction with the 'new' operator. If this parameter
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* type is one that will probably give VC++ a headache, this should be set
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* true to indicate that the code generator should save the return value
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* expression into a temporary variable first, and pass the temporary variable
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* name in instead.
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*/
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bool ParameterRemap::
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return_value_should_be_simple() {
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return false;
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}
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/**
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* Returns true if the type represented by the conversion is now the atomic
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* string type. We have to have this crazy method for representing atomic
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* string, because there's no such type in C (and hence no corresponding
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* CPPType *).
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*/
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bool ParameterRemap::
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new_type_is_atomic_string() {
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return false;
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}
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/**
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* Returns true if this is the "this" parameter.
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*/
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bool ParameterRemap::
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is_this() {
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return false;
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}
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