150 lines
6.0 KiB
C++
150 lines
6.0 KiB
C++
// Filename: parameterRemap.cxx
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// Created by: drose (01Aug00)
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//
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////////////////////////////////////////////////////////////////////
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//
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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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////////////////////////////////////////////////////////////////////
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#include "parameterRemap.h"
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemap::Destructor
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// Access: Public, Virtual
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// Description:
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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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// Function: ParameterRemap::pass_parameter
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// Access: Public, Virtual
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// Description: Outputs an expression that converts the indicated
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// variable from the original type to the new type, for
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// passing into the actual C++ function.
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////////////////////////////////////////////////////////////////////
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void ParameterRemap::
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pass_parameter(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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// Function: ParameterRemap::prepare_return_expr
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// Access: Public, Virtual
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// Description: This will be called immediately before
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// get_return_expr(). It outputs whatever lines the
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// remapper needs to the function to set up its return
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// value, e.g. to declare a temporary variable or
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// something. It should return the modified expression.
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////////////////////////////////////////////////////////////////////
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string ParameterRemap::
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prepare_return_expr(ostream &, int, const string &expression) {
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return expression;
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}
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////////////////////////////////////////////////////////////////////
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// Function: ParameterRemap::get_return_expr
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// Access: Public, Virtual
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// Description: Returns an expression that evalutes to the
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// appropriate value type for returning from the
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// 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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// Function: ParameterRemap::temporary_to_return
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// Access: Public, Virtual
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// Description: Returns the string that converts the expression
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// stored in the indicated temporary variable to the
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// appropriate return value type. This is normally a
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// pass-through, but in cases when the temporary
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// variable type must be different than the return type
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// (i.e. get_temporary_type() != get_new_type()), this
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// 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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// Function: ParameterRemap::return_value_needs_management
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// Access: Public, Virtual
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// Description: Returns true if the return value represents a value
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// that was newly allocated, and hence must be
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// 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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// Function: ParameterRemap::get_return_value_destructor
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// Access: Public, Virtual
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// Description: If return_value_needs_management() returns true, this
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// should return the index of the function that should
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// be called when it is time to destruct the return
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// value. It will generally be the same as the
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// destructor for the class we just returned a pointer
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// 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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// Function: ParameterRemap::return_value_should_be_simple
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// Access: Public, Virtual
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// Description: This is a hack around a problem VC++ has with
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// overly-complex expressions, particularly in
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// conjunction with the 'new' operator. If this
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// parameter type is one that will probably give VC++ a
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// headache, this should be set true to indicate that
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// the code generator should save the return value
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// expression into a temporary variable first, and pass
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// the temporary variable 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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// Function: ParameterRemap::new_type_is_atomic_string
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// Access: Public, Virtual
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// Description: Returns true if the type represented by the
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// conversion is now the atomic string type. We have to
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// have this crazy method for representing atomic
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// string, because there's no such type in C (and hence
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// no corresponding 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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// Function: ParameterRemap::is_this
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// Access: Public, Virtual
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// Description: 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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