Package org.antlr.runtime
Interface CharStream
- All Superinterfaces:
IntStream
- All Known Implementing Classes:
ANTLRFileStream
,ANTLRInputStream
,ANTLRReaderStream
,ANTLRStringStream
A source of characters for an ANTLR lexer
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Field Summary
Fields -
Method Summary
Modifier and TypeMethodDescriptionint
The index of the character relative to the beginning of the line 0..n-1int
getLine()
ANTLR tracks the line information automaticallyint
LT
(int i) Get the ith character of lookahead.void
setCharPositionInLine
(int pos) void
setLine
(int line) Because this stream can rewind, we need to be able to reset the linesubstring
(int start, int stop) For infinite streams, you don't need this; primarily I'm providing a useful interface for action code.
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Field Details
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EOF
static final int EOF- See Also:
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Method Details
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substring
For infinite streams, you don't need this; primarily I'm providing a useful interface for action code. Just make sure actions don't use this on streams that don't support it. -
LT
int LT(int i) Get the ith character of lookahead. This is the same usually as LA(i). This will be used for labels in the generated lexer code. I'd prefer to return a char here type-wise, but it's probably better to be 32-bit clean and be consistent with LA. -
getLine
int getLine()ANTLR tracks the line information automatically -
setLine
void setLine(int line) Because this stream can rewind, we need to be able to reset the line -
setCharPositionInLine
void setCharPositionInLine(int pos) -
getCharPositionInLine
int getCharPositionInLine()The index of the character relative to the beginning of the line 0..n-1
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