public override int Compile(FunctionContext context)
{
context.Line(FileName, Line);
var isStatement = Parent is IBlockStatementExpression;
if (Name == null && isStatement)
throw new MondCompilerException(FileName, Line, "Function is never used");
IdentifierOperand identifier = null;
if (Name != null)
{
if (!context.DefineIdentifier(Name, true))
throw new MondCompilerException(FileName, Line, "Identifier '{0}' was previously defined in this scope", Name);
identifier = context.Identifier(Name);
}
var functionContext = context.MakeFunction(Name);
functionContext.Function(FileName, Name);
context.PushFrame();
for (var i = 0; i < Arguments.Count; i++)
{
var name = Arguments[i];
if (!functionContext.DefineArgument(i, name))
throw new MondCompilerException(FileName, Line, "Identifier '{0}' was previously defined in this scope", name);
}
functionContext.Bind(functionContext.Label);
functionContext.Enter();
Block.Compile(functionContext);
functionContext.LoadUndefined();
functionContext.Return();
context.PopFrame();
context.Closure(functionContext.Label);
if (identifier != null)
{
if (!isStatement) // statements should leave nothing on the stack
context.Dup();
context.Store(identifier);
if (isStatement)
return 0;
}
return 1;
}