/// <summary>
/// Removes a child from this compile statement's children and returns it for adding somewhere else
/// </summary>
/// <param name="index"></param>
/// <returns></returns>
public CompiledStatement RemoveAt(int index)
{
Debug.Assert(ChildCompiledStatements.Count > index);
CompiledStatement child = ChildCompiledStatements[index];
ChildCompiledStatements.RemoveAt(index);
return(child);
}
public override void PerformOperation()
{
// Set up our parameters if required
if (ParameterNames.Count > 0)
{
Debug.Assert(ChildCount > 0, "Fatal error in function call - no arguments to process");
CompiledStatement thisCallsParams = ChildCompiledStatements[0];
ChildCompiledStatements.RemoveAt(0);
// This will run through each stored parameter and add them to the stack
thisCallsParams.PerformOperation();
}
// Set up our parameters - read them off the stack with the first parameter at the top
for (int i = 0; i < ParameterNames.Count; i++)
{
Debug.Assert(CelesteStack.StackSize > 0, "Insufficient parameters to function");
CelesteObject input = CelesteStack.Pop();
Variable functionParameter = FunctionScope.GetLocalVariable(ParameterNames[i], ScopeSearchOption.kThisScope);
if (input.IsReference())
{
functionParameter.Value = input.ValueImpl;
}
else
{
(functionParameter.Value as Reference).Value = input.Value;
}
}
CelesteStack.CurrentScope = FunctionScope;
// Performs all the operators on the children first
foreach (CompiledStatement statement in FuncImpl.ChildCompiledStatements)
{
statement.PerformOperation();
if (statement is ReturnKeyword)
{
// Stop iterating through if we have hit a ReturnKeyword in our function
break;
}
}
CelesteStack.Scopes.Remove(FunctionScope);
CelesteStack.CurrentScope = FunctionScope.ParentScope;
}