public override IMatched <Unit> Parse(ParseState state, Token[] tokens, ExpressionBuilder builder)
{
var source = tokens[2].Text;
state.Colorize(tokens, Color.Whitespace, Color.Identifier);
if (state.DefExpression(source).If(out var defExpression))
{
builder.Add(defExpression);
}
else
{
builder.Add(builder.Flags[ExpressionFlags.Comparisand] ? new PlaceholderSymbol($"-{source}") : new FieldSymbol(source));
}
return(Unit.Matched());
}
