void tokenize_file(SourceFile sourceFile, ModuleContainer module, ParserSession session)
{
Stream input;
try
{
input = File.OpenRead(sourceFile.Name);
}
catch
{
Report.Error(2001, "Source file `" + sourceFile.Name + "' could not be found");
return;
}
using (input)
{
SeekableStreamReader reader = new SeekableStreamReader(input, ctx.Settings.Encoding);
var file = new CompilationSourceFile(module, sourceFile);
Tokenizer lexer = new Tokenizer(reader, file, session, ctx.Report);
int token, tokens = 0, errors = 0;
while ((token = lexer.token()) != Token.EOF)
{
tokens++;
if (token == Token.ERROR)
{
errors++;
}
}
Console.WriteLine("Tokenized: " + tokens + " found " + errors + " errors");
}
return;
}
public void Parse(SourceFile file, ModuleContainer module, ParserSession session, Report report)
{
Stream input;
try {
input = File.OpenRead(file.Name);
} catch {
report.Error(2001, "Source file `{0}' could not be found", file.Name);
return;
}
// Check 'MZ' header
if (input.ReadByte() == 77 && input.ReadByte() == 90)
{
report.Error(2015, "Source file `{0}' is a binary file and not a text file", file.Name);
input.Close();
return;
}
input.Position = 0;
SeekableStreamReader reader = new SeekableStreamReader(input, ctx.Settings.Encoding, session.StreamReaderBuffer);
Parse(reader, file, module, session, report);
if (ctx.Settings.GenerateDebugInfo && report.Errors == 0 && !file.HasChecksum)
{
input.Position = 0;
var checksum = session.GetChecksumAlgorithm();
file.SetChecksum(checksum.ComputeHash(input));
}
reader.Dispose();
input.Close();
}
void tokenize_file (SourceFile sourceFile, ModuleContainer module, ParserSession session)
{
Stream input;
try {
input = File.OpenRead (sourceFile.Name);
} catch {
Report.Error (2001, "Source file `" + sourceFile.Name + "' could not be found");
return;
}
using (input){
SeekableStreamReader reader = new SeekableStreamReader (input, ctx.Settings.Encoding);
var file = new CompilationSourceFile (module, sourceFile);
Tokenizer lexer = new Tokenizer (reader, file, session, ctx.Report);
int token, tokens = 0, errors = 0;
while ((token = lexer.token ()) != Token.EOF){
tokens++;
if (token == Token.ERROR)
errors++;
}
Console.WriteLine ("Tokenized: " + tokens + " found " + errors + " errors");
}
return;
}
public static CSharpParser Parse(SeekableStreamReader reader, SourceFile sourceFile, ModuleContainer module, ParserSession session, Report report, int lineModifier = 0, int colModifier = 0)
{
var file = new CompilationSourceFile(module, sourceFile);
module.AddTypeContainer(file);
CSharpParser parser = new CSharpParser(reader, file, report, session);
parser.Lexer.Line += lineModifier;
parser.Lexer.Column += colModifier;
parser.Lexer.sbag = new SpecialsBag();
parser.parse();
return(parser);
}
//
// Parses the string @input and returns a CSharpParser if succeeful.
//
// if @silent is set to true then no errors are
// reported to the user. This is used to do various calls to the
// parser and check if the expression is parsable.
//
// @partial_input: if @silent is true, then it returns whether the
// parsed expression was partial, and more data is needed
//
CSharpParser ParseString(ParseMode mode, string input, out bool partial_input)
{
partial_input = false;
Reset();
var enc = ctx.Settings.Encoding;
var s = new MemoryStream(enc.GetBytes(input));
SeekableStreamReader seekable = new SeekableStreamReader(s, enc);
InputKind kind = ToplevelOrStatement(seekable);
if (kind == InputKind.Error)
{
if (mode == ParseMode.ReportErrors)
{
ctx.Report.Error(-25, "Detection Parsing Error");
}
partial_input = false;
return(null);
}
if (kind == InputKind.EOF)
{
if (mode == ParseMode.ReportErrors)
{
Console.Error.WriteLine("Internal error: EOF condition should have been detected in a previous call with silent=true");
}
partial_input = true;
return(null);
}
seekable.Position = 0;
source_file.DeclarationFound = false;
CSharpParser parser = new CSharpParser(seekable, source_file, new ParserSession());
if (kind == InputKind.StatementOrExpression)
{
parser.Lexer.putback_char = Tokenizer.EvalStatementParserCharacter;
parser.Lexer.parsing_block++;
ctx.Settings.StatementMode = true;
}
else
{
parser.Lexer.putback_char = Tokenizer.EvalCompilationUnitParserCharacter;
ctx.Settings.StatementMode = false;
}
if (mode == ParseMode.GetCompletions)
{
parser.Lexer.CompleteOnEOF = true;
}
ReportPrinter old_printer = null;
if ((mode == ParseMode.Silent || mode == ParseMode.GetCompletions))
{
old_printer = ctx.Report.SetPrinter(new StreamReportPrinter(TextWriter.Null));
}
try {
parser.parse();
} finally {
if (ctx.Report.Errors != 0)
{
if (mode != ParseMode.ReportErrors && parser.UnexpectedEOF)
{
partial_input = true;
}
if (parser.undo != null)
{
parser.undo.ExecuteUndo();
}
parser = null;
}
if (old_printer != null)
{
ctx.Report.SetPrinter(old_printer);
}
}
return(parser);
}
//
// Deambiguates the input string to determine if we
// want to process a statement or if we want to
// process a compilation unit.
//
// This is done using a top-down predictive parser,
// since the yacc/jay parser can not deambiguage this
// without more than one lookahead token. There are very
// few ambiguities.
//
InputKind ToplevelOrStatement(SeekableStreamReader seekable)
{
Tokenizer tokenizer = new Tokenizer(seekable, source_file, new ParserSession(), ctx.Report);
// Prefer contextual block keywords over identifiers
tokenizer.parsing_block++;
int t = tokenizer.token();
switch (t)
{
case Token.EOF:
return(InputKind.EOF);
// These are toplevels
case Token.EXTERN:
case Token.OPEN_BRACKET:
case Token.ABSTRACT:
case Token.CLASS:
case Token.ENUM:
case Token.INTERFACE:
case Token.INTERNAL:
case Token.NAMESPACE:
case Token.PRIVATE:
case Token.PROTECTED:
case Token.PUBLIC:
case Token.SEALED:
case Token.STATIC:
case Token.STRUCT:
return(InputKind.CompilationUnit);
// Definitely expression
case Token.FIXED:
case Token.BOOL:
case Token.BYTE:
case Token.CHAR:
case Token.DECIMAL:
case Token.DOUBLE:
case Token.FLOAT:
case Token.INT:
case Token.LONG:
case Token.NEW:
case Token.OBJECT:
case Token.SBYTE:
case Token.SHORT:
case Token.STRING:
case Token.UINT:
case Token.ULONG:
return(InputKind.StatementOrExpression);
// These need deambiguation help
case Token.USING:
t = tokenizer.token();
if (t == Token.EOF)
{
return(InputKind.EOF);
}
if (t == Token.IDENTIFIER)
{
return(InputKind.CompilationUnit);
}
return(InputKind.StatementOrExpression);
// Distinguish between:
// delegate opt_anonymous_method_signature block
// delegate type
case Token.DELEGATE:
t = tokenizer.token();
if (t == Token.EOF)
{
return(InputKind.EOF);
}
if (t == Token.OPEN_PARENS || t == Token.OPEN_BRACE)
{
return(InputKind.StatementOrExpression);
}
return(InputKind.CompilationUnit);
// Distinguih between:
// unsafe block
// unsafe as modifier of a type declaration
case Token.UNSAFE:
t = tokenizer.token();
if (t == Token.EOF)
{
return(InputKind.EOF);
}
if (t == Token.OPEN_PARENS)
{
return(InputKind.StatementOrExpression);
}
return(InputKind.CompilationUnit);
// These are errors: we list explicitly what we had
// from the grammar, ERROR and then everything else
case Token.READONLY:
case Token.OVERRIDE:
case Token.ERROR:
return(InputKind.Error);
// This catches everything else allowed by
// expressions. We could add one-by-one use cases
// if needed.
default:
return(InputKind.StatementOrExpression);
}
}
public CSharpParser (SeekableStreamReader reader, CompilationSourceFile file, Report report, ParserSession session)
{
this.file = file;
current_container = current_namespace = file;
this.module = file.Module;
this.compiler = file.Compiler;
this.settings = compiler.Settings;
this.report = report;
lang_version = settings.Version;
yacc_verbose_flag = settings.VerboseParserFlag;
doc_support = settings.DocumentationFile != null;
lexer = new Tokenizer (reader, file, session, report);
oob_stack = new Stack<object> ();
lbag = session.LocationsBag;
use_global_stacks = session.UseJayGlobalArrays;
parameters_bucket = session.ParametersStack;
}
public CSharpParser (SeekableStreamReader reader, CompilationSourceFile file, ParserSession session)
: this (reader, file, file.Compiler.Report, session)
{
}
//
// Processes "see" or "seealso" elements from cref attribute.
//
void HandleXrefCommon(MemberCore mc, XmlElement xref)
{
string cref = xref.GetAttribute("cref");
// when, XmlReader, "if (cref == null)"
if (!xref.HasAttribute("cref"))
{
return;
}
// Nothing to be resolved the reference is marked explicitly
if (cref.Length > 2 && cref [1] == ':')
{
return;
}
// Additional symbols for < and > are allowed for easier XML typing
cref = cref.Replace('{', '<').Replace('}', '>');
var encoding = module.Compiler.Settings.Encoding;
var s = new MemoryStream(encoding.GetBytes(cref));
var source_file = new CompilationSourceFile(doc_module, mc.Location.SourceFile);
var report = new Report(doc_module.Compiler, new NullReportPrinter());
if (session == null)
{
session = new ParserSession {
UseJayGlobalArrays = true
}
}
;
SeekableStreamReader seekable = new SeekableStreamReader(s, encoding, session.StreamReaderBuffer);
var parser = new CSharpParser(seekable, source_file, report, session);
ParsedParameters = null;
ParsedName = null;
ParsedBuiltinType = null;
ParsedOperator = null;
parser.Lexer.putback_char = Tokenizer.DocumentationXref;
parser.Lexer.parsing_generic_declaration_doc = true;
parser.parse();
if (report.Errors > 0)
{
Report.Warning(1584, 1, mc.Location, "XML comment on `{0}' has syntactically incorrect cref attribute `{1}'",
mc.GetSignatureForError(), cref);
xref.SetAttribute("cref", "!:" + cref);
return;
}
MemberSpec member;
string prefix = null;
FullNamedExpression fne = null;
//
// Try built-in type first because we are using ParsedName as identifier of
// member names on built-in types
//
if (ParsedBuiltinType != null && (ParsedParameters == null || ParsedName != null))
{
member = ParsedBuiltinType.Type;
}
else
{
member = null;
}
if (ParsedName != null || ParsedOperator.HasValue)
{
TypeSpec type = null;
string member_name = null;
if (member == null)
{
if (ParsedOperator.HasValue)
{
type = mc.CurrentType;
}
else if (ParsedName.Left != null)
{
fne = ResolveMemberName(mc, ParsedName.Left);
if (fne != null)
{
var ns = fne as NamespaceExpression;
if (ns != null)
{
fne = ns.LookupTypeOrNamespace(mc, ParsedName.Name, ParsedName.Arity, LookupMode.Probing, Location.Null);
if (fne != null)
{
member = fne.Type;
}
}
else
{
type = fne.Type;
}
}
}
else
{
fne = ResolveMemberName(mc, ParsedName);
if (fne == null)
{
type = mc.CurrentType;
}
else if (ParsedParameters == null)
{
member = fne.Type;
}
else if (fne.Type.MemberDefinition == mc.CurrentType.MemberDefinition)
{
member_name = Constructor.ConstructorName;
type = fne.Type;
}
}
}
else
{
type = (TypeSpec)member;
member = null;
}
if (ParsedParameters != null)
{
var old_printer = mc.Module.Compiler.Report.SetPrinter(new NullReportPrinter());
try {
var context = new DocumentationMemberContext(mc, ParsedName ?? MemberName.Null);
foreach (var pp in ParsedParameters)
{
pp.Resolve(context);
}
} finally {
mc.Module.Compiler.Report.SetPrinter(old_printer);
}
}
if (type != null)
{
if (member_name == null)
{
member_name = ParsedOperator.HasValue ?
Operator.GetMetadataName(ParsedOperator.Value) : ParsedName.Name;
}
int parsed_param_count;
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit)
{
parsed_param_count = ParsedParameters.Count - 1;
}
else if (ParsedParameters != null)
{
parsed_param_count = ParsedParameters.Count;
}
else
{
parsed_param_count = 0;
}
int parameters_match = -1;
do
{
var members = MemberCache.FindMembers(type, member_name, true);
if (members != null)
{
foreach (var m in members)
{
if (ParsedName != null && m.Arity != ParsedName.Arity)
{
continue;
}
if (ParsedParameters != null)
{
IParametersMember pm = m as IParametersMember;
if (pm == null)
{
continue;
}
if (m.Kind == MemberKind.Operator && !ParsedOperator.HasValue)
{
continue;
}
var pm_params = pm.Parameters;
int i;
for (i = 0; i < parsed_param_count; ++i)
{
var pparam = ParsedParameters[i];
if (i >= pm_params.Count || pparam == null || pparam.TypeSpec == null ||
!TypeSpecComparer.Override.IsEqual(pparam.TypeSpec, pm_params.Types[i]) ||
(pparam.Modifier & Parameter.Modifier.RefOutMask) != (pm_params.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask))
{
if (i > parameters_match)
{
parameters_match = i;
}
i = -1;
break;
}
}
if (i < 0)
{
continue;
}
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit)
{
if (pm.MemberType != ParsedParameters[parsed_param_count].TypeSpec)
{
parameters_match = parsed_param_count + 1;
continue;
}
}
else
{
if (parsed_param_count != pm_params.Count)
{
continue;
}
}
}
if (member != null)
{
Report.Warning(419, 3, mc.Location,
"Ambiguous reference in cref attribute `{0}'. Assuming `{1}' but other overloads including `{2}' have also matched",
cref, member.GetSignatureForError(), m.GetSignatureForError());
break;
}
member = m;
}
}
// Continue with parent type for nested types
if (member == null)
{
type = type.DeclaringType;
}
else
{
type = null;
}
} while (type != null);
if (member == null && parameters_match >= 0)
{
for (int i = parameters_match; i < parsed_param_count; ++i)
{
Report.Warning(1580, 1, mc.Location, "Invalid type for parameter `{0}' in XML comment cref attribute `{1}'",
(i + 1).ToString(), cref);
}
if (parameters_match == parsed_param_count + 1)
{
Report.Warning(1581, 1, mc.Location, "Invalid return type in XML comment cref attribute `{0}'", cref);
}
}
}
}
if (member == null)
{
Report.Warning(1574, 1, mc.Location, "XML comment on `{0}' has cref attribute `{1}' that could not be resolved",
mc.GetSignatureForError(), cref);
cref = "!:" + cref;
}
else if (member == InternalType.Namespace)
{
cref = "N:" + fne.GetSignatureForError();
}
else
{
prefix = GetMemberDocHead(member);
cref = prefix + member.GetSignatureForDocumentation();
}
xref.SetAttribute("cref", cref);
}
public static CSharpParser Parse (SeekableStreamReader reader, SourceFile sourceFile, ModuleContainer module, ParserSession session, Report report, int lineModifier = 0, int colModifier = 0)
{
var file = new CompilationSourceFile (module, sourceFile);
module.AddTypeContainer(file);
CSharpParser parser = new CSharpParser (reader, file, report, session);
parser.Lexer.Line += lineModifier;
parser.Lexer.Column += colModifier;
parser.Lexer.sbag = new SpecialsBag ();
parser.parse ();
return parser;
}
public void Parse (SourceFile file, ModuleContainer module, ParserSession session, Report report)
{
Stream input;
try {
input = File.OpenRead (file.Name);
} catch {
report.Error (2001, "Source file `{0}' could not be found", file.Name);
return;
}
// Check 'MZ' header
if (input.ReadByte () == 77 && input.ReadByte () == 90) {
report.Error (2015, "Source file `{0}' is a binary file and not a text file", file.Name);
input.Close ();
return;
}
input.Position = 0;
SeekableStreamReader reader = new SeekableStreamReader (input, ctx.Settings.Encoding, session.StreamReaderBuffer);
Parse (reader, file, module, session, report);
if (ctx.Settings.GenerateDebugInfo && report.Errors == 0 && !file.HasChecksum) {
input.Position = 0;
var checksum = session.GetChecksumAlgorithm ();
file.SetChecksum (checksum.ComputeHash (input));
}
reader.Dispose ();
input.Close ();
}
/*
/// <summary>
/// Parses a file snippet; guessing what the code snippet represents (whole file, type members, block, type reference, expression).
/// </summary>
public AstNode ParseSnippet (string code)
{
// TODO: add support for parsing a part of a file
throw new NotImplementedException ();
}
*/
public DocumentationReference ParseDocumentationReference(string cref)
{
// see ICSharpCode.NRefactory.MonoCSharp.DocumentationBuilder.HandleXrefCommon
if (cref == null)
throw new ArgumentNullException("cref");
// Additional symbols for < and > are allowed for easier XML typing
cref = cref.Replace('{', '<').Replace('}', '>');
lock (parseLock) {
errorReportPrinter = new ErrorReportPrinter("");
var ctx = new CompilerContext(compilerSettings.ToMono(), errorReportPrinter);
ctx.Settings.TabSize = 1;
var reader = new SeekableStreamReader(new StringTextSource(cref));
var file = new SourceFile("", "", 0);
Location.Initialize(new List<SourceFile>(new [] { file }));
var module = new ModuleContainer(ctx);
module.DocumentationBuilder = new DocumentationBuilder(module);
var source_file = new CompilationSourceFile(module);
var report = new Report(ctx, errorReportPrinter);
var session = new ParserSession();
session.LocationsBag = new LocationsBag();
var parser = new ICSharpCode.NRefactory.MonoCSharp.CSharpParser(reader, source_file, report, session);
parser.Lexer.Line += initialLocation.Line - 1;
parser.Lexer.Column += initialLocation.Column - 1;
parser.Lexer.putback_char = Tokenizer.DocumentationXref;
parser.Lexer.parsing_generic_declaration_doc = true;
parser.parse();
if (report.Errors > 0) {
// Report.Warning (1584, 1, mc.Location, "XML comment on `{0}' has syntactically incorrect cref attribute `{1}'",
// mc.GetSignatureForError (), cref);
}
var conversionVisitor = new ConversionVisitor(false, session.LocationsBag);
var docRef = conversionVisitor.ConvertXmlDoc(module.DocumentationBuilder);
CompilerCallableEntryPoint.Reset();
return docRef;
}
}
SyntaxTree Parse(ITextSource program, string fileName, int initialLine, int initialColumn)
{
lock (parseLock) {
errorReportPrinter = new ErrorReportPrinter("");
var ctx = new CompilerContext(compilerSettings.ToMono(), errorReportPrinter);
ctx.Settings.TabSize = 1;
var reader = new SeekableStreamReader(program);
var file = new SourceFile(fileName, fileName, 0);
Location.Initialize(new List<SourceFile>(new [] { file }));
var module = new ModuleContainer(ctx);
var session = new ParserSession();
session.LocationsBag = new LocationsBag();
var report = new Report(ctx, errorReportPrinter);
var parser = Driver.Parse(reader, file, module, session, report, initialLine - 1, initialColumn - 1);
var top = new CompilerCompilationUnit {
ModuleCompiled = module,
LocationsBag = session.LocationsBag,
SpecialsBag = parser.Lexer.sbag,
Conditionals = parser.Lexer.SourceFile.Conditionals
};
var unit = Parse(top, fileName);
unit.Errors.AddRange(errorReportPrinter.Errors);
CompilerCallableEntryPoint.Reset();
return unit;
}
}
//
// Processes "see" or "seealso" elements from cref attribute.
//
void HandleXrefCommon (MemberCore mc, XmlElement xref)
{
string cref = xref.GetAttribute ("cref");
// when, XmlReader, "if (cref == null)"
if (!xref.HasAttribute ("cref"))
return;
// Nothing to be resolved the reference is marked explicitly
if (cref.Length > 2 && cref [1] == ':')
return;
// Additional symbols for < and > are allowed for easier XML typing
cref = cref.Replace ('{', '<').Replace ('}', '>');
var encoding = module.Compiler.Settings.Encoding;
var s = new MemoryStream (encoding.GetBytes (cref));
var source_file = new CompilationSourceFile (doc_module, mc.Location.SourceFile);
var report = new Report (doc_module.Compiler, new NullReportPrinter ());
if (session == null)
session = new ParserSession {
UseJayGlobalArrays = true
};
SeekableStreamReader seekable = new SeekableStreamReader (s, encoding, session.StreamReaderBuffer);
var parser = new CSharpParser (seekable, source_file, report, session);
ParsedParameters = null;
ParsedName = null;
ParsedBuiltinType = null;
ParsedOperator = null;
parser.Lexer.putback_char = Tokenizer.DocumentationXref;
parser.Lexer.parsing_generic_declaration_doc = true;
parser.parse ();
if (report.Errors > 0) {
Report.Warning (1584, 1, mc.Location, "XML comment on `{0}' has syntactically incorrect cref attribute `{1}'",
mc.GetSignatureForError (), cref);
xref.SetAttribute ("cref", "!:" + cref);
return;
}
MemberSpec member;
string prefix = null;
FullNamedExpression fne = null;
//
// Try built-in type first because we are using ParsedName as identifier of
// member names on built-in types
//
if (ParsedBuiltinType != null && (ParsedParameters == null || ParsedName != null)) {
member = ParsedBuiltinType.Type;
} else {
member = null;
}
if (ParsedName != null || ParsedOperator.HasValue) {
TypeSpec type = null;
string member_name = null;
if (member == null) {
if (ParsedOperator.HasValue) {
type = mc.CurrentType;
} else if (ParsedName.Left != null) {
fne = ResolveMemberName (mc, ParsedName.Left);
if (fne != null) {
var ns = fne as NamespaceExpression;
if (ns != null) {
fne = ns.LookupTypeOrNamespace (mc, ParsedName.Name, ParsedName.Arity, LookupMode.Probing, Location.Null);
if (fne != null) {
member = fne.Type;
}
} else {
type = fne.Type;
}
}
} else {
fne = ResolveMemberName (mc, ParsedName);
if (fne == null) {
type = mc.CurrentType;
} else if (ParsedParameters == null) {
member = fne.Type;
} else if (fne.Type.MemberDefinition == mc.CurrentType.MemberDefinition) {
member_name = Constructor.ConstructorName;
type = fne.Type;
}
}
} else {
type = (TypeSpec) member;
member = null;
}
if (ParsedParameters != null) {
var old_printer = mc.Module.Compiler.Report.SetPrinter (new NullReportPrinter ());
try {
var context = new DocumentationMemberContext (mc, ParsedName ?? MemberName.Null);
foreach (var pp in ParsedParameters) {
pp.Resolve (context);
}
} finally {
mc.Module.Compiler.Report.SetPrinter (old_printer);
}
}
if (type != null) {
if (member_name == null)
member_name = ParsedOperator.HasValue ?
Operator.GetMetadataName (ParsedOperator.Value) : ParsedName.Name;
int parsed_param_count;
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit) {
parsed_param_count = ParsedParameters.Count - 1;
} else if (ParsedParameters != null) {
parsed_param_count = ParsedParameters.Count;
} else {
parsed_param_count = 0;
}
int parameters_match = -1;
do {
var members = MemberCache.FindMembers (type, member_name, true);
if (members != null) {
foreach (var m in members) {
if (ParsedName != null && m.Arity != ParsedName.Arity)
continue;
if (ParsedParameters != null) {
IParametersMember pm = m as IParametersMember;
if (pm == null)
continue;
if (m.Kind == MemberKind.Operator && !ParsedOperator.HasValue)
continue;
var pm_params = pm.Parameters;
int i;
for (i = 0; i < parsed_param_count; ++i) {
var pparam = ParsedParameters[i];
if (i >= pm_params.Count || pparam == null || pparam.TypeSpec == null ||
!TypeSpecComparer.Override.IsEqual (pparam.TypeSpec, pm_params.Types[i]) ||
(pparam.Modifier & Parameter.Modifier.RefOutMask) != (pm_params.FixedParameters[i].ModFlags & Parameter.Modifier.RefOutMask)) {
if (i > parameters_match) {
parameters_match = i;
}
i = -1;
break;
}
}
if (i < 0)
continue;
if (ParsedOperator == Operator.OpType.Explicit || ParsedOperator == Operator.OpType.Implicit) {
if (pm.MemberType != ParsedParameters[parsed_param_count].TypeSpec) {
parameters_match = parsed_param_count + 1;
continue;
}
} else {
if (parsed_param_count != pm_params.Count)
continue;
}
}
if (member != null) {
Report.Warning (419, 3, mc.Location,
"Ambiguous reference in cref attribute `{0}'. Assuming `{1}' but other overloads including `{2}' have also matched",
cref, member.GetSignatureForError (), m.GetSignatureForError ());
break;
}
member = m;
}
}
// Continue with parent type for nested types
if (member == null) {
type = type.DeclaringType;
} else {
type = null;
}
} while (type != null);
if (member == null && parameters_match >= 0) {
for (int i = parameters_match; i < parsed_param_count; ++i) {
Report.Warning (1580, 1, mc.Location, "Invalid type for parameter `{0}' in XML comment cref attribute `{1}'",
(i + 1).ToString (), cref);
}
if (parameters_match == parsed_param_count + 1) {
Report.Warning (1581, 1, mc.Location, "Invalid return type in XML comment cref attribute `{0}'", cref);
}
}
}
}
if (member == null) {
Report.Warning (1574, 1, mc.Location, "XML comment on `{0}' has cref attribute `{1}' that could not be resolved",
mc.GetSignatureForError (), cref);
cref = "!:" + cref;
} else if (member == InternalType.Namespace) {
cref = "N:" + fne.GetSignatureForError ();
} else {
prefix = GetMemberDocHead (member);
cref = prefix + member.GetSignatureForDocumentation ();
}
xref.SetAttribute ("cref", cref);
}
//
// Parses the string @input and returns a CSharpParser if succeeful.
//
// if @silent is set to true then no errors are
// reported to the user. This is used to do various calls to the
// parser and check if the expression is parsable.
//
// @partial_input: if @silent is true, then it returns whether the
// parsed expression was partial, and more data is needed
//
CSharpParser ParseString (ParseMode mode, string input, out bool partial_input)
{
partial_input = false;
Reset ();
var enc = ctx.Settings.Encoding;
var s = new MemoryStream (enc.GetBytes (input));
SeekableStreamReader seekable = new SeekableStreamReader (s, enc);
InputKind kind = ToplevelOrStatement (seekable);
if (kind == InputKind.Error){
if (mode == ParseMode.ReportErrors)
ctx.Report.Error (-25, "Detection Parsing Error");
partial_input = false;
return null;
}
if (kind == InputKind.EOF){
if (mode == ParseMode.ReportErrors)
Console.Error.WriteLine ("Internal error: EOF condition should have been detected in a previous call with silent=true");
partial_input = true;
return null;
}
seekable.Position = 0;
source_file.DeclarationFound = false;
CSharpParser parser = new CSharpParser (seekable, source_file, new ParserSession ());
if (kind == InputKind.StatementOrExpression){
parser.Lexer.putback_char = Tokenizer.EvalStatementParserCharacter;
parser.Lexer.parsing_block++;
ctx.Settings.StatementMode = true;
} else {
parser.Lexer.putback_char = Tokenizer.EvalCompilationUnitParserCharacter;
ctx.Settings.StatementMode = false;
}
if (mode == ParseMode.GetCompletions)
parser.Lexer.CompleteOnEOF = true;
ReportPrinter old_printer = null;
if ((mode == ParseMode.Silent || mode == ParseMode.GetCompletions))
old_printer = ctx.Report.SetPrinter (new StreamReportPrinter (TextWriter.Null));
try {
parser.parse ();
} finally {
if (ctx.Report.Errors != 0){
if (mode != ParseMode.ReportErrors && parser.UnexpectedEOF)
partial_input = true;
if (parser.undo != null)
parser.undo.ExecuteUndo ();
parser = null;
}
if (old_printer != null)
ctx.Report.SetPrinter (old_printer);
}
return parser;
}
//
// Deambiguates the input string to determine if we
// want to process a statement or if we want to
// process a compilation unit.
//
// This is done using a top-down predictive parser,
// since the yacc/jay parser can not deambiguage this
// without more than one lookahead token. There are very
// few ambiguities.
//
InputKind ToplevelOrStatement (SeekableStreamReader seekable)
{
Tokenizer tokenizer = new Tokenizer (seekable, source_file, new ParserSession (), ctx.Report);
// Prefer contextual block keywords over identifiers
tokenizer.parsing_block++;
int t = tokenizer.token ();
switch (t){
case Token.EOF:
return InputKind.EOF;
// These are toplevels
case Token.EXTERN:
case Token.OPEN_BRACKET:
case Token.ABSTRACT:
case Token.CLASS:
case Token.ENUM:
case Token.INTERFACE:
case Token.INTERNAL:
case Token.NAMESPACE:
case Token.PRIVATE:
case Token.PROTECTED:
case Token.PUBLIC:
case Token.SEALED:
case Token.STATIC:
case Token.STRUCT:
return InputKind.CompilationUnit;
// Definitely expression
case Token.FIXED:
case Token.BOOL:
case Token.BYTE:
case Token.CHAR:
case Token.DECIMAL:
case Token.DOUBLE:
case Token.FLOAT:
case Token.INT:
case Token.LONG:
case Token.NEW:
case Token.OBJECT:
case Token.SBYTE:
case Token.SHORT:
case Token.STRING:
case Token.UINT:
case Token.ULONG:
return InputKind.StatementOrExpression;
// These need deambiguation help
case Token.USING:
t = tokenizer.token ();
if (t == Token.EOF)
return InputKind.EOF;
if (t == Token.IDENTIFIER)
return InputKind.CompilationUnit;
return InputKind.StatementOrExpression;
// Distinguish between:
// delegate opt_anonymous_method_signature block
// delegate type
case Token.DELEGATE:
t = tokenizer.token ();
if (t == Token.EOF)
return InputKind.EOF;
if (t == Token.OPEN_PARENS || t == Token.OPEN_BRACE)
return InputKind.StatementOrExpression;
return InputKind.CompilationUnit;
// Distinguih between:
// unsafe block
// unsafe as modifier of a type declaration
case Token.UNSAFE:
t = tokenizer.token ();
if (t == Token.EOF)
return InputKind.EOF;
if (t == Token.OPEN_PARENS)
return InputKind.StatementOrExpression;
return InputKind.CompilationUnit;
// These are errors: we list explicitly what we had
// from the grammar, ERROR and then everything else
case Token.READONLY:
case Token.OVERRIDE:
case Token.ERROR:
return InputKind.Error;
// This catches everything else allowed by
// expressions. We could add one-by-one use cases
// if needed.
default:
return InputKind.StatementOrExpression;
}
}
