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// ErrorValue.cpp: implementation of the CErrorValue class.
/*
* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Erwin Coumans makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#include "ErrorValue.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CErrorValue::CErrorValue()
/*
pre:
effect: constructs a new CErrorValue containing errormessage "Error"
*/
{
m_strErrorText = "Error";
SetError(true);
}
CErrorValue::CErrorValue(STR_String errmsg)
/*
pre:
effect: constructs a new CErrorValue containing errormessage errmsg
*/
{
m_strErrorText = "[" + errmsg + "]";
SetError(true);
}
CErrorValue::~CErrorValue()
/*
pre:
effect: deletes the object
*/
{
}
CValue* CErrorValue::Calc(VALUE_OPERATOR op, CValue *val)
/*
pre:
ret: a new object containing the result of applying operator op to this
object and val
*/
{
CValue* errorval;
switch (op)
{
case VALUE_POS_OPERATOR:
case VALUE_NEG_OPERATOR:
case VALUE_NOT_OPERATOR:
{
errorval = new CErrorValue (op2str(op) + GetText());
break;
}
default:
{
errorval = val->CalcFinal(VALUE_ERROR_TYPE, op, this);
break;
}
}
return errorval;
}
CValue* CErrorValue::CalcFinal(VALUE_DATA_TYPE dtype, VALUE_OPERATOR op, CValue *val)
/*
pre: the type of val is dtype
ret: a new object containing the result of applying operator op to val and
this object
*/
{
return new CErrorValue (val->GetText() + op2str(op) + GetText());
}
float CErrorValue::GetNumber()
{
return -1;
}
const STR_String & CErrorValue::GetText()
{
return m_strErrorText;
}
CValue* CErrorValue::GetReplica()
{
// who would want a copy of an error ?
trace ("Error: ErrorValue::GetReplica() not implemented yet");
assertd(false);
return NULL;
}
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