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69 lines
2.8 KiB
69 lines
2.8 KiB
4 months ago
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/*
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* [The "BSD licence"]
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* Copyright (c) 2005-2008 Terence Parr
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* All rights reserved.
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*
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* Conversion to C#:
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* Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace Antlr.Runtime {
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/** <summary>A source of characters for an ANTLR lexer</summary> */
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public interface ICharStream : IIntStream {
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/** <summary>
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* For infinite streams, you don't need this; primarily I'm providing
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* a useful interface for action code. Just make sure actions don't
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* use this on streams that don't support it.
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* </summary>
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*/
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string Substring(int start, int length);
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/** <summary>
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* Get the ith character of lookahead. This is the same usually as
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* LA(i). This will be used for labels in the generated
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* lexer code. I'd prefer to return a char here type-wise, but it's
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* probably better to be 32-bit clean and be consistent with LA.
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* </summary>
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*/
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int LT(int i);
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/** <summary>ANTLR tracks the line information automatically</summary> */
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/** <summary>Because this stream can rewind, we need to be able to reset the line</summary> */
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int Line {
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get;
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set;
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}
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/** <summary>The index of the character relative to the beginning of the line 0..n-1</summary> */
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int CharPositionInLine {
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get;
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set;
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}
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}
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}
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