void
XmlConfig::XmlConfigData::resolveVariables(std::string &val) const {
size_t pos_begin = std::string::npos;
while(true) {
pos_begin = val.rfind("${", pos_begin);
if (pos_begin == std::string::npos) {
return;
}
size_t pos_end = val.find('}', pos_begin);
std::string name = val.substr(pos_begin + 2, pos_end - pos_begin - 2);
if (checkVariableName(name)) {
val.replace(pos_begin, pos_end - pos_begin + 1, findVariable(name));
}
else {
throw std::runtime_error("incorrect variable name format: " + name);
}
}
}
//
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Function Name: build
// Purpose:
// Inputs:
// Output:
// Notes:
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
RPNExpression ExpressionBuilder::build() {
for (map<string, CustomOperator *>::iterator iter = m_customOperators.begin(); iter != m_customOperators.end(); ++iter) {
CustomOperator *pop = (*iter).second;
for (int i = 0; i < (int)(pop -> symbol().length()); i++) {
list<char>::iterator iter = find(m_validOperatorSymbols.begin(), m_validOperatorSymbols.end(), pop -> symbol()[i]);
if (iter == m_validOperatorSymbols.end())
throw new UnparsableExpressionException("" + pop -> symbol() + " is not a valid symbol for an operator please choose from: !,#,ยง,$,&,;,:,~,<,>,|,=");
}
m_builtInOperators.insert(*iter);
}
for (map<string, double>::iterator iter = m_variables.begin(); iter != m_variables.end(); ++iter) {
string varName = (*iter).first;
checkVariableName(varName);
if (m_customFunctions.find(varName) != m_customFunctions.end())
throw new UnparsableExpressionException("Variable '" + varName + "' cannot have the same name as a function");
}
RPNConverter rpnConverter;
RPNExpression rpnExpr = rpnConverter.toRPNExpression(m_expression, m_variables, m_customFunctions, m_builtInOperators);
return rpnExpr;
}
