public static ConditionalNode Read(ReadParams p, DataType refDataType, Span opSpan, string[] stopStrings)
{
var code = p.Code;
var ret = new ConditionalNode(p.Statement, opSpan);
var condStopStrings = stopStrings == null || stopStrings.Length == 0 ? s_stopStrings : stopStrings.Concat(s_stopStrings).ToArray();
var trueExp = ExpressionNode.Read(p, refDataType, condStopStrings);
if (trueExp == null)
{
p.Statement.ReportError(new Span(code.Position, code.Position + 1), CAError.CA0042); // Expected value to follow conditional '?'.
return(ret);
}
ret._trueExp = trueExp;
if (!code.ReadExact(':'))
{
p.Statement.ReportError(new Span(code.Position, code.Position + 1), CAError.CA0041); // Expected ':' to follow conditional result.
return(ret);
}
var falseExp = ExpressionNode.Read(p, refDataType, condStopStrings);
if (falseExp == null)
{
p.Statement.ReportError(new Span(code.Position, code.Position + 1), CAError.CA0043); // Expected value to follow conditional ':'.
return(ret);
}
if (code.ReadExact('?'))
{
// Stacked conditional
var group = new GroupNode(p.Statement, null);
group.AddChild(falseExp);
group.AddChild(ConditionalNode.Read(p, refDataType, code.Span, stopStrings));
ret._falseExp = group;
}
else
{
ret._falseExp = falseExp;
}
return(ret);
}
