diff options
Diffstat (limited to 'runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreePatternLexer.cs')
-rw-r--r-- | runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreePatternLexer.cs | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreePatternLexer.cs b/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreePatternLexer.cs deleted file mode 100644 index e742205..0000000 --- a/runtime/CSharp3/Sources/Antlr3.Runtime/Tree/TreePatternLexer.cs +++ /dev/null @@ -1,162 +0,0 @@ -/* - * [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.Tree -{ - using StringBuilder = System.Text.StringBuilder; - - public class TreePatternLexer - { - public const int Begin = 1; - public const int End = 2; - public const int Id = 3; - public const int Arg = 4; - public const int Percent = 5; - public const int Colon = 6; - public const int Dot = 7; - - /** <summary>The tree pattern to lex like "(A B C)"</summary> */ - protected string pattern; - - /** <summary>Index into input string</summary> */ - protected int p = -1; - - /** <summary>Current char</summary> */ - protected int c; - - /** <summary>How long is the pattern in char?</summary> */ - protected int n; - - /** <summary>Set when token type is ID or ARG (name mimics Java's StreamTokenizer)</summary> */ - public StringBuilder sval = new StringBuilder(); - - public bool error = false; - - public TreePatternLexer( string pattern ) - { - this.pattern = pattern; - this.n = pattern.Length; - Consume(); - } - - public virtual int NextToken() - { - sval.Length = 0; // reset, but reuse buffer - while ( c != CharStreamConstants.EndOfFile ) - { - if ( c == ' ' || c == '\n' || c == '\r' || c == '\t' ) - { - Consume(); - continue; - } - if ( ( c >= 'a' && c <= 'z' ) || ( c >= 'A' && c <= 'Z' ) || c == '_' ) - { - sval.Append( (char)c ); - Consume(); - while ( ( c >= 'a' && c <= 'z' ) || ( c >= 'A' && c <= 'Z' ) || - ( c >= '0' && c <= '9' ) || c == '_' ) - { - sval.Append( (char)c ); - Consume(); - } - return Id; - } - if ( c == '(' ) - { - Consume(); - return Begin; - } - if ( c == ')' ) - { - Consume(); - return End; - } - if ( c == '%' ) - { - Consume(); - return Percent; - } - if ( c == ':' ) - { - Consume(); - return Colon; - } - if ( c == '.' ) - { - Consume(); - return Dot; - } - if ( c == '[' ) - { - // grab [x] as a string, returning x - Consume(); - while ( c != ']' ) - { - if ( c == '\\' ) - { - Consume(); - if ( c != ']' ) - { - sval.Append( '\\' ); - } - sval.Append( (char)c ); - } - else - { - sval.Append( (char)c ); - } - Consume(); - } - Consume(); - return Arg; - } - Consume(); - error = true; - return CharStreamConstants.EndOfFile; - } - return CharStreamConstants.EndOfFile; - } - - protected virtual void Consume() - { - p++; - if ( p >= n ) - { - c = CharStreamConstants.EndOfFile; - } - else - { - c = pattern[p]; - } - } - } -} |