// += -=
public override int VisitExpPlusMinusEquals(YarnSpinnerParser.ExpPlusMinusEqualsContext context)
{
// call the helper to deal with this
opEquals(context.variable().GetText(), context.expression(), context.op.Type);
return(0);
}
public override Yarn.Type VisitExpPlusMinusEquals(YarnSpinnerParser.ExpPlusMinusEqualsContext context)
{
ParserRuleContext[] terms = { context.variable(), context.expression() };
switch (context.op.Text)
{
case "+=":
// + supports strings and numbers
return(CheckOperation(context, terms, context.op.Text, Yarn.Type.String, Yarn.Type.Number));
case "-=":
// - supports only numbers
return(CheckOperation(context, terms, context.op.Text, Yarn.Type.Number));
default:
throw new InvalidOperationException($"Internal error: {nameof(VisitExpMultDivMod)} got unexpected op {context.op.Text}");
}
}