public SyntaxListBuilder Allocate()
{
SyntaxListBuilder item;
if (_freeIndex > 0)
{
_freeIndex--;
item = _freeList[_freeIndex];
_freeList[_freeIndex] = null;
}
else
{
item = new SyntaxListBuilder(10);
}
#if DEBUG
Debug.Assert(!_allocated.Contains(item));
_allocated.Add(item);
#endif
return(item);
}
public SeparatedSyntaxListBuilder(SyntaxListBuilder builder)
{
_builder = builder;
}
public SyntaxListBuilder(SyntaxListBuilder builder)
{
_builder = builder;
}
private DirectiveTriviaSyntax ParsePragmaDirective(SyntaxToken hash, SyntaxToken pragma, bool isActive)
{
bool hasError = false;
if (this.CurrentToken.ContextualKind == SyntaxKind.WarningKeyword)
{
var warning = this.EatContextualToken(SyntaxKind.WarningKeyword);
SyntaxToken style;
if (this.CurrentToken.Kind == SyntaxKind.DisableKeyword || this.CurrentToken.Kind == SyntaxKind.RestoreKeyword ||
this.CurrentToken.Kind == SyntaxKind.EnableKeyword || this.CurrentToken.Kind == SyntaxKind.SafeOnlyKeyword)
{
style = this.EatToken();
if (this.CurrentToken.ContextualKind == SyntaxKind.NullableKeyword)
{
SyntaxToken nullable = this.EatContextualToken(SyntaxKind.NullableKeyword);
var end = this.ParseEndOfDirective(hasError || !isActive, afterPragma: true);
return(SyntaxFactory.PragmaWarningDirectiveTrivia(hash, pragma, warning, style, nullable, default(SyntaxList <ExpressionSyntax>), end, isActive));
}
else if (style.Kind == SyntaxKind.SafeOnlyKeyword)
{
SyntaxToken nullable = this.EatToken(SyntaxKind.NullableKeyword, ErrorCode.WRN_IllegalPPWarningSafeOnly, reportError: isActive);
var end = this.ParseEndOfDirective(ignoreErrors: true, afterPragma: true);
return(SyntaxFactory.PragmaWarningDirectiveTrivia(hash, pragma, warning, style, nullable, default(SyntaxList <ExpressionSyntax>), end, isActive));
}
else
{
var ids = new SyntaxListBuilder(10);
while (this.CurrentToken.Kind != SyntaxKind.EndOfDirectiveToken)
{
SyntaxToken id;
ExpressionSyntax idExpression;
if (this.CurrentToken.Kind == SyntaxKind.NumericLiteralToken)
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive
// (or via /nowarn /warnaserror flags on the command line).
// Going forward, we won't generate any warning in such cases. This will make
// maintenance of backwards compatibility easier (we no longer need to worry
// about breaking existing projects / command lines if we deprecate / remove
// an old warning code).
id = this.EatToken();
idExpression = SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, id);
}
else if (this.CurrentToken.Kind == SyntaxKind.IdentifierToken)
{
// Lexing / parsing of identifiers inside #pragma warning directives is identical
// to that inside #define directives except that very long identifiers inside #define
// are truncated to 128 characters to maintain backwards compatibility with previous
// versions of the compiler. (See TruncateIdentifier() below.)
// Since support for identifiers inside #pragma warning directives is new,
// we don't have any backwards compatibility constraints. So we can preserve the
// identifier exactly as it appears in source.
id = this.EatToken();
idExpression = SyntaxFactory.IdentifierName(id);
}
else
{
id = this.EatToken(SyntaxKind.NumericLiteralToken, ErrorCode.WRN_IdentifierOrNumericLiteralExpected, reportError: isActive);
idExpression = SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, id);
}
hasError = hasError || id.ContainsDiagnostics;
ids.Add(idExpression);
if (this.CurrentToken.Kind != SyntaxKind.CommaToken)
{
break;
}
ids.Add(this.EatToken());
}
var end = this.ParseEndOfDirective(hasError || !isActive, afterPragma: true);
return(SyntaxFactory.PragmaWarningDirectiveTrivia(hash, pragma, warning, style, null, ids.ToList(), end, isActive));
}
}
else
{
style = this.EatToken(SyntaxKind.DisableKeyword, ErrorCode.WRN_IllegalPPWarning, reportError: isActive);
var end = this.ParseEndOfDirective(ignoreErrors: true, afterPragma: true);
return(SyntaxFactory.PragmaWarningDirectiveTrivia(hash, pragma, warning, style, null, default(SyntaxList <ExpressionSyntax>), end, isActive));
}
}
else if (this.CurrentToken.Kind == SyntaxKind.ChecksumKeyword)
{
var checksum = this.EatToken();
var file = this.EatToken(SyntaxKind.StringLiteralToken, ErrorCode.WRN_IllegalPPChecksum, reportError: isActive);
var guid = this.EatToken(SyntaxKind.StringLiteralToken, ErrorCode.WRN_IllegalPPChecksum, reportError: isActive && !file.IsMissing);
if (isActive && !guid.IsMissing)
{
Guid tmp;
if (!Guid.TryParse(guid.GetValueText(), out tmp))
{
guid = this.AddError(guid, ErrorCode.WRN_IllegalPPChecksum);
}
}
var bytes = this.EatToken(SyntaxKind.StringLiteralToken, ErrorCode.WRN_IllegalPPChecksum, reportError: isActive && !guid.IsMissing);
if (isActive && !bytes.IsMissing)
{
if (bytes.GetValueText().Length % 2 != 0)
{
bytes = this.AddError(bytes, ErrorCode.WRN_IllegalPPChecksum);
}
else
{
foreach (char c in bytes.GetValueText())
{
if (!SyntaxFacts.IsHexDigit(c))
{
bytes = this.AddError(bytes, ErrorCode.WRN_IllegalPPChecksum);
break;
}
}
}
}
hasError = file.ContainsDiagnostics | guid.ContainsDiagnostics | bytes.ContainsDiagnostics;
var eod = this.ParseEndOfDirective(ignoreErrors: hasError, afterPragma: true);
return(SyntaxFactory.PragmaChecksumDirectiveTrivia(hash, pragma, checksum, file, guid, bytes, eod, isActive));
}
else
{
var warning = this.EatToken(SyntaxKind.WarningKeyword, ErrorCode.WRN_IllegalPragma, reportError: isActive);
var style = this.EatToken(SyntaxKind.DisableKeyword, reportError: false);
var eod = this.ParseEndOfDirective(ignoreErrors: true, afterPragma: true);
return(SyntaxFactory.PragmaWarningDirectiveTrivia(hash, pragma, warning, style, null, default(SyntaxList <ExpressionSyntax>), eod, isActive));
}
}
protected void AddTrailingSkippedSyntax(SyntaxListBuilder list, GreenNode skippedSyntax)
{
list[list.Count - 1] = AddTrailingSkippedSyntax((LeeSyntaxNode)list[list.Count - 1], skippedSyntax);
}
