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/*
* [The "BSD licence"]
* Copyright (c) 2005-2008 Terence Parr
* All rights reserved.
*
* Conversion to C#:
* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Antlr.Runtime
{
/** <summary>A source of characters for an ANTLR lexer</summary> */
public interface ICharStream : IIntStream
{
/** <summary>
* 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.
* </summary>
*/
string Substring( int start, int length );
/** <summary>
* 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.
* </summary>
*/
int LT( int i );
/** <summary>ANTLR tracks the line information automatically</summary> */
/** <summary>Because this stream can rewind, we need to be able to reset the line</summary> */
int Line
{
get;
set;
}
/** <summary>The index of the character relative to the beginning of the line 0..n-1</summary> */
int CharPositionInLine
{
get;
set;
}
}
}
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