/// <summary>
/// Lexes a compilation unit.
/// </summary>
/// <param name="text"> The text to lex. </param>
/// <param name="defines"> The set of preprocessor symbols defined in source.
/// Is modified to include results of #define/#undef found in this compilation unit. </param>
/// <param name="lineMap">The LineMap contains the source text to file/line mapping
/// as a result of #line directives. </param>
/// <param name="includeComments"> Should comment tokens be generated. </param>
/// <returns></returns>
public Token[] Lex(char[] text, IDictionary defines, LineMap lineMap, bool includeComments) {
// initialize
_text = new TextBuffer(text);
_defines = defines;
_lineMap = lineMap;
_includeComments = includeComments;
LexFile();
_text = null;
_defines = null;
_lineMap = null;
_includeComments = false;
return (Token[])_tokens.ToArray(typeof(Token));
}
public PreprocessorLine ParseNextLine(TextBuffer text, IDictionary defines) {
PreprocessorLine line = null;
do {
lexer.SkipWhiteSpace();
if (lexer.EOF) {
line = new PreprocessorLine(PreprocessorTokenType.EndOfLine);
}
else if (text.PeekChar() != '#') {
lexer.IgnoreRestOfLine();
}
else {
line = Parse(text, defines);
}
} while (line == null);
return line;
}
/// <summary>
/// Lexes a block of C# text.
/// Does not handle preprocessor directives.
/// Will stop at EOF or before a # found as the first non-whitespace character
/// on a line.
/// </summary>
/// <param name="text"> Buffer containing the text to lex. </param>
/// <param name="tokenList"> List of tokens to add to. </param>
/// <param name="includeComments"> Should comment tokens be generated. </param>
/// <returns> true if a preprocessor directive was found, or false on end of buffer. </returns>
public bool LexBlock(TextBuffer text, IList tokenList, bool includeComments) {
Debug.Assert(_keywords != null);
Debug.Assert(_nameTable != null);
Debug.Assert(_text == null);
Debug.Assert(_tokenList == null);
Debug.Assert(_lastLine == -1);
_text = text;
_tokenList = tokenList;
_lastLine = text.Line - 1;
_includeComments = includeComments;
// get the tokens
Token next = null;
do {
next = NextToken();
if (next == null) {
// pre-processor directive
break;
}
if (next.Type != TokenType.Error && next.Type != TokenType.EOF) {
tokenList.Add(next);
}
} while (next.Type != TokenType.EOF);
_tokenList = null;
_text = null;
_lastLine = -1;
_includeComments = false;
ClearPosition();
return next == null;
}
/// <summary>
/// Lexes a block of C# text.
/// Does not handle preprocessor directives.
/// Will stop at EOF or before a # found as the first non-whitespace character
/// on a line. Does not include comment tokens.
/// </summary>
/// <param name="text"> Buffer containing the text to lex. </param>
/// <param name="tokenList"> List of tokens to add to. </param>
/// <returns> true if a preprocessor directive was found, or false on end of buffer. </returns>
public bool LexBlock(TextBuffer text, IList tokenList) {
return LexBlock(text, tokenList, false);
}
public PreprocessorLine Parse(TextBuffer text, IDictionary defines)
{
this.text = text;
this.defines = defines;
Debug.Assert(text.PeekChar() == '#');
text.NextChar();
PreprocessorToken token = NextToken();
PreprocessorTokenType type = token.Type;
switch (type) {
case PreprocessorTokenType.Define:
case PreprocessorTokenType.Undef:
token = Eat(PreprocessorTokenType.Identifier);
EatEndOfLine();
if (token != null) {
return new PreprocessorDeclarationLine(type, ((PreprocessorIdentifierToken)token).Value);
}
else {
return null;
}
case PreprocessorTokenType.Warning:
case PreprocessorTokenType.Error:
return new PreprocessorControlLine(type, lexer.GetRestOfLine());
case PreprocessorTokenType.Line:
// hidden, default
type = PeekType();
if (type == PreprocessorTokenType.Default || type == PreprocessorTokenType.Hidden) {
NextToken();
EatEndOfLine();
return new PreprocessorLine(type);
}
token = Eat(PreprocessorTokenType.Int);
if (token != null) {
int line = ((PreprocessorIntToken)token).Value;
string file = null;
if (PeekType() == PreprocessorTokenType.String) {
file = ((PreprocessorStringToken)NextToken()).Value;
}
EatEndOfLine();
return new PreprocessorLineNumberLine(line, file);
}
else {
lexer.IgnoreRestOfLine();
return null;
}
case PreprocessorTokenType.If:
case PreprocessorTokenType.Elif:
return new PreprocessorIfLine(type, EvalExpression());
case PreprocessorTokenType.Else:
case PreprocessorTokenType.Endif:
return new PreprocessorLine(type);
case PreprocessorTokenType.Region:
case PreprocessorTokenType.EndRegion:
lexer.IgnoreRestOfLine();
return new PreprocessorLine(type);
case PreprocessorTokenType.Pragma:
lexer.IgnoreRestOfLine();
return new PreprocessorLine(type);
default:
ReportError(PreprocessorError.UnexpectedDirective, token.Position);
return null;
}
}
public PreprocessorLine Parse(TextBuffer text, IDictionary defines)
{
this.text = text;
this.defines = defines;
Debug.Assert(text.PeekChar() == '#');
text.NextChar();
PreprocessorToken token = NextToken();
PreprocessorTokenType type = token.Type;
switch (type)
{
case PreprocessorTokenType.Define:
case PreprocessorTokenType.Undef:
token = Eat(PreprocessorTokenType.Identifier);
EatEndOfLine();
if (token != null)
{
return(new PreprocessorDeclarationLine(type, ((PreprocessorIdentifierToken)token).Value));
}
else
{
return(null);
}
case PreprocessorTokenType.Warning:
case PreprocessorTokenType.Error:
return(new PreprocessorControlLine(type, lexer.GetRestOfLine()));
case PreprocessorTokenType.Line:
// hidden, default
type = PeekType();
if (type == PreprocessorTokenType.Default || type == PreprocessorTokenType.Hidden)
{
NextToken();
EatEndOfLine();
return(new PreprocessorLine(type));
}
token = Eat(PreprocessorTokenType.Int);
if (token != null)
{
int line = ((PreprocessorIntToken)token).Value;
string file = null;
if (PeekType() == PreprocessorTokenType.String)
{
file = ((PreprocessorStringToken)NextToken()).Value;
}
EatEndOfLine();
return(new PreprocessorLineNumberLine(line, file));
}
else
{
lexer.IgnoreRestOfLine();
return(null);
}
case PreprocessorTokenType.If:
case PreprocessorTokenType.Elif:
return(new PreprocessorIfLine(type, EvalExpression()));
case PreprocessorTokenType.Else:
case PreprocessorTokenType.Endif:
return(new PreprocessorLine(type));
case PreprocessorTokenType.Region:
case PreprocessorTokenType.EndRegion:
lexer.IgnoreRestOfLine();
return(new PreprocessorLine(type));
case PreprocessorTokenType.Pragma:
lexer.IgnoreRestOfLine();
return(new PreprocessorLine(type));
default:
ReportError(PreprocessorError.UnexpectedDirective, token.Position);
return(null);
}
}
/// <summary>
/// Lexes a block of C# text.
/// Does not handle preprocessor directives.
/// Will stop at EOF or before a # found as the first non-whitespace character
/// on a line. Does not include comment tokens.
/// </summary>
/// <param name="text"> Buffer containing the text to lex. </param>
/// <param name="tokenList"> List of tokens to add to. </param>
/// <returns> true if a preprocessor directive was found, or false on end of buffer. </returns>
public bool LexBlock(TextBuffer text, IList tokenList)
{
return(LexBlock(text, tokenList, false));
}
public PreprocessorToken NextToken(TextBuffer text)
{
_text = text;
SkipWhiteSpace();
BufferPosition position = text.Position;
char ch = PeekChar();
if (ch == '\0' || IsLineSeparator(ch)) {
return NewPPToken(PreprocessorTokenType.EndOfLine, position);
}
ch = NextChar();
switch (ch) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
int intValue = (ch - '0');
while (IsDigit(PeekChar())) {
int value10 = intValue * 10;
if (value10 < intValue) {
ReportError(LexError.NumericConstantOverflow);
}
else {
intValue = value10 + (NextChar() - '0');
}
}
return new PreprocessorIntToken(intValue, position);
}
case '=':
if (PeekChar() == '=') {
NextChar();
return NewPPToken(PreprocessorTokenType.EqualEqual, position);
}
break;
case '!':
if (PeekChar() == '=') {
NextChar();
return NewPPToken(PreprocessorTokenType.NotEqual, position);
}
else {
return NewPPToken(PreprocessorTokenType.Not, position);
}
case '&':
if (PeekChar() == '&') {
NextChar();
return NewPPToken(PreprocessorTokenType.And, position);
}
break;
case '|':
if (PeekChar() == '|') {
NextChar();
return NewPPToken(PreprocessorTokenType.Or, position);
}
break;
case '(':
return NewPPToken(PreprocessorTokenType.OpenParen, position);
case ')':
return NewPPToken(PreprocessorTokenType.CloseParen, position);
case '"':
_value.Length = 0;
while ((ch = PeekChar()) != '"') {
if (EOF) {
ReportError(LexError.UnexpectedEndOfFileString);
break;
}
else if (IsLineSeparator(ch)) {
ReportError(LexError.WhiteSpaceInConstant);
break;
}
_value.Append(ch);
NextChar();
}
NextChar();
return new PreprocessorStringToken(_value.ToString(), position);
case '/':
if (PeekChar() == '/') {
IgnoreRestOfLine();
return NewPPToken(PreprocessorTokenType.EndOfLine, position);
}
break;
default:
if (IsLineSeparator(ch)) {
return NewPPToken(PreprocessorTokenType.EndOfLine, position);
}
if (!IsIdentifierChar(ch)) {
break;
}
_value.Length = 0;
_value.Append(ch);
while (IsIdentifierChar(PeekChar())) {
_value.Append(NextChar());
}
Name id = _nameTable.Add(_value);
PreprocessorTokenType type = _keywords.IsKeyword(id);
if (type != PreprocessorTokenType.Invalid) {
return NewPPToken(type, position);
}
else {
return new PreprocessorIdentifierToken(id, position);
}
}
return NewPPToken(PreprocessorTokenType.Unknown, position);
}
