public override object VisitFunctionVariableDeclarationStatement([NotNull] ClepsParser.FunctionVariableDeclarationStatementContext context)
{
ClepsVariable variable = Visit(context.variableDeclaration()) as ClepsVariable;
VariableManager variableManager = VariableManagers.Last();
if (!variableManager.IsVariableNameAvailable(variable.VariableName))
{
string errorMessage = String.Format("Variable {0} is already defined", variable.VariableName);
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage));
//Use a different variable name to avoid stopping the compilation
string newVariableName = variableManager.GetAvailableVariableName(variable.VariableName);
variable = new ClepsVariable(newVariableName, variable.VariableType, variable.IsConstant);
}
IValue value = null;
if (context.rightHandExpression() != null)
{
value = Visit(context.rightHandExpression()) as IValue;
if (variable.VariableType != value.ExpressionType)
{
throw new NotImplementedException("Assignment for non identical types not supported yet");
}
}
IValueRegister variableRegister = CurrMethodGenerator.CreateNewVariable(variable, value);
variableManager.AddLocalVariable(variable, variableRegister);
return(variable);
}
private IValueRegister GetVariableRegisterOrNullWithError([NotNull] ClepsParser.VariableAssignmentContext context)
{
string variableName = Visit(context.variable()) as string;
var variableManager = VariableManagers.Last();
IValueRegister register;
if (!variableManager.IsVariableAvailable(variableName))
{
string errorMessage = String.Format("Variable {0} does not exist", variableName);
Status.AddError(new CompilerError(FileName, context.Start.Line, context.Start.Column, errorMessage));
register = null;
}
else
{
register = variableManager.GetVariableRegister(variableName);
}
return(register);
}