private bool IsPossibleExpression()
{
var tk = this.CurrentToken.Kind;
switch (tk)
{
case SyntaxKind.DefaultKeyword:
case SyntaxKind.ArgListKeyword:
case SyntaxKind.SuperKeyword:
case SyntaxKind.FalseKeyword:
case SyntaxKind.ThisKeyword:
case SyntaxKind.TrueKeyword:
case SyntaxKind.NullKeyword:
case SyntaxKind.OpenParenToken:
case SyntaxKind.NumericLiteralToken:
case SyntaxKind.StringLiteralToken:
case SyntaxKind.CharacterLiteralToken:
case SyntaxKind.NewKeyword:
case SyntaxKind.ColonColonToken: // bad aliased name
case SyntaxKind.AtToken:
case SyntaxKind.OpenBraceToken:
return(true);
case SyntaxKind.IdentifierToken:
// Specifically allow the from contextual keyword, because it can always be the start of an
// expression (whether it is used as an identifier or a keyword).
return(this.IsTrueIdentifier());
default:
return(IsExpectedPrefixUnaryOperator(tk) ||
(IsPredefinedType(tk) && tk != SyntaxKind.VoidKeyword) ||
SyntaxKindFacts.IsAnyUnaryExpression(tk) ||
SyntaxKindFacts.IsBinaryExpression(tk));
}
}
