A base class for wrappers that modify lexer behavior. Implements the ILexer interface, except for the NextToken() method. More...
Source file:
Remarks
A base class for wrappers that modify lexer behavior. Implements the ILexer interface, except for the NextToken() method.
Properties | |
| ILexer< Token > | Lexer [get, set] |
| ISourceFile | SourceFile [get] |
| virtual IMessageSink | ErrorSink [get, set] |
| int | IndentLevel [get] |
| UString | IndentString [get] |
| int | LineNumber [get] |
| int | InputPosition [get] |
| string | FileName [get] |
 Properties inherited from Loyc.Syntax.Lexing.ILexer< Token > | |
| ISourceFile | SourceFile [get] |
| The file being lexed. More... | |
| IMessageSink | ErrorSink [get, set] |
| Event handler for errors. More... | |
| int | IndentLevel [get] |
| Indentation level of the current line. This is updated after scanning the first whitespaces on a new line, and may be reset to zero when NextToken() returns a newline. More... | |
| UString | IndentString [get] |
| Gets a string slice that holds the spaces or tabs that were used to indent the current line. More... | |
| int | LineNumber [get] |
| Current line number (1 for the first line). More... | |
| int | InputPosition [get] |
| Current input position (an index into SourceFile.Text). More... | |
| Properties inherited from Loyc.Syntax.IHasFileName | |
| string | FileName [get] |
Public Member Functions | |
| LexerWrapper (ILexer< Token > sourceLexer) | |
| abstract Maybe< Token > | NextToken () |
Returns the next (postprocessed) token. This method should set the _current field to the returned value. More... | |
| ILineColumnFile | IndexToLine (int index) |
| Returns the position in a source file of the specified index. More... | |
| virtual void | Reset () |
Protected Member Functions | |
| void | WriteError (int index, string msg, params object[] args) |
Protected fields | |
| Maybe< Token > | _current |
Member Function Documentation
◆ IndexToLine()
|
inline |
Returns the position in a source file of the specified index.
If index is negative, this should return a SourcePos where Line and PosInLine are zero (signifying an unknown location). If index is beyond the end of the file, this should retun the final position in the file.
Implements Loyc.Syntax.IIndexToLine.
◆ NextToken()
|
pure virtual |
Returns the next (postprocessed) token. This method should set the _current field to the returned value.
Implements Loyc.Syntax.Lexing.ILexer< Token >.
Implemented in Loyc.Syntax.Lexing.IndentTokenGenerator< Token >, Loyc.Ecs.Parser.EcsPreprocessor, Loyc.Syntax.Lexing.TokensToTree, Loyc.Syntax.Lexing.TriviaSaver, and Loyc.Syntax.Lexing.WhitespaceFilter< Token >.
