private static IEnumerable <Command> CompileArrayIdentifier(SubroutineCompilationUnit compilationUnit,
ArrayIdentifier arrayIdentifier)
{
yield return(compilationUnit.PushSymbol(arrayIdentifier.Identifier.Value));
foreach (var command in CompileExpression(compilationUnit, arrayIdentifier.Expression))
{
yield return(command);
}
yield return(Commands.Arithmetic.Add());
yield return(Commands.Pop.Pointer(1));
yield return(Commands.Push.That(0));
}
public LetStatement(Tokenizer tokenizer)
{
tokenizer.CurrentIs(Keyword.Let).Move().CurrentIsIdentifier();
if (tokenizer.Next.Equals(Symbol.OpenBracket))
{
Varible = new ArrayIdentifier(tokenizer.GetCurrentThenMove() as Identifier, tokenizer);
}
else
{
Varible = tokenizer.GetCurrentThenMove() as Identifier;
}
tokenizer.CurrentIs(Symbol.Equal).Move();
Expression = new Expression(tokenizer);
tokenizer.CurrentIs(Symbol.SemiColon).Move();
}
