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The LexerToken
interface encapsulates a single token retrieved by a call to Lexer.lex()
. This simply provides a convenient way for the lexer to return multiple pieces of information (token class, start offset, end offset) from the Lexer to its clients.
It is defined as an interface to allow language-specific Lexer implementations to add additional information pieces to the token object.
The LexerToken
is allocated using a call to Lexer.createLexerToken()
, and is passed into the Lexer.lex()
to be filled in.
Lexer
Method Summary | |
int |
getEndOffset() Fetches the end offset of the token (offset relative to the original ReadTextBuffer being lexed. |
int |
getStartOffset() Fetches the start offset of the token (offset relative to the original ReadTextBuffer being lexed. |
int |
getToken() Fetches the (language-specific) token represented by this LexerToken . |
Method Detail |
public int getToken()
LexerToken
. You must refer to the language-specific Lexer that was responsible for filling this LexerToken
instance to interpret the token.public int getStartOffset()
ReadTextBuffer
being lexed. Note that the start offset is inclusive (compare to end offset which is exclusive), to match the behavior in the String
class.public int getEndOffset()
ReadTextBuffer
being lexed. Note that the end offset is exclusive (similar to end offsets in the String class.)
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