private ExpressionSyntax ParsePrimary()
{
var k = this.CurrentToken.Kind;
switch (k)
{
case SyntaxKind.OpenParenToken:
var open = this.EatToken();
var expr = this.ParseExpression();
var close = this.EatToken(SyntaxKind.CloseParenToken);
return(SyntaxFactory.ParenthesizedExpression(open, expr, close));
case SyntaxKind.IdentifierToken:
var identifier = TruncateIdentifier(this.EatToken());
return(SyntaxFactory.IdentifierName(identifier));
case SyntaxKind.TrueKeyword:
case SyntaxKind.FalseKeyword:
return(SyntaxFactory.LiteralExpression(
SyntaxFacts.GetLiteralExpression(k),
this.EatToken()
));
default:
return(SyntaxFactory.IdentifierName(
this.EatToken(SyntaxKind.IdentifierToken, ErrorCode.ERR_InvalidPreprocExpr)
));
}
}