ShaderTools.Hlsl.Parser.DirectiveParser.ParseIfDirective C# (CSharp) Method

        private IfDirectiveTriviaSyntax ParseIfDirective(SyntaxToken hash, SyntaxToken keyword, bool isActive)
        {
            _lexer.ExpandMacros = true;
            var expr = ParseDirectiveExpression();
            _lexer.ExpandMacros = false;

            var eod = ParseEndOfDirective(false);

            var isTrue = EvaluateBool(expr);
            var branchTaken = isActive && isTrue;

            return new IfDirectiveTriviaSyntax(
                hash, keyword, expr, eod,
                isActive, branchTaken, isTrue);
        }