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Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/CharStreamState.cs')
-rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/CharStreamState.cs | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/CharStreamState.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/CharStreamState.cs new file mode 100644 index 0000000..b595710 --- /dev/null +++ b/runtime/CSharp3/Sources/Antlr3.Runtime/CharStreamState.cs @@ -0,0 +1,56 @@ +/* + * [The "BSD licence"] + * Copyright (c) 2005-2008 Terence Parr + * All rights reserved. + * + * Conversion to C#: + * Copyright (c) 2008 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> + * When walking ahead with cyclic DFA or for syntactic predicates, + * we need to record the state of the input stream (char index, + * line, etc...) so that we can rewind the state after scanning ahead. + * </summary> + * + * <remarks>This is the complete state of a stream.</remarks> + */ + [System.Serializable] + public class CharStreamState + { + /** <summary>Index into the char stream of next lookahead char</summary> */ + public int p; + + /** <summary>What line number is the scanner at before processing buffer[p]?</summary> */ + public int line; + + /** <summary>What char position 0..n-1 in line is scanner before processing buffer[p]?</summary> */ + public int charPositionInLine; + } +} |