Line data    Source code

       1           0 : /*
       2             :         OOISNumberLiteral.h
       3             :         
       4             :         Utility function to recognize certain number literals, corresponding to
       5             :         C-style decimal integer literals and floating point literals without
       6             :         trailing type suffixes.
       7             :         
       8             :         
       9             :         Copyright (C) 2008-2013 Jens Ayton
      10             :         
      11             :         Permission is hereby granted, free of charge, to any person obtaining a copy
      12             :         of this software and associated documentation files (the "Software"), to deal
      13             :         in the Software without restriction, including without limitation the rights
      14             :         to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      15             :         copies of the Software, and to permit persons to whom the Software is
      16             :         furnished to do so, subject to the following conditions:
      17             :         
      18             :         The above copyright notice and this permission notice shall be included in all
      19             :         copies or substantial portions of the Software.
      20             :         
      21             :         THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      22             :         IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      23             :         FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      24             :         AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      25             :         LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      26             :         OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
      27             :         SOFTWARE.
      28             : */
      29             : 
      30             : #import "OOCocoa.h"
      31             : 
      32             : 
      33             : /*      Recognise C-style decimal integer or float literals, without type suffix.
      34             :         More formally, it tests against the following grammar:
      35             :         
      36             :                 number ::= [<whitespace>] [<sign>] basicNumber [<exponent>] [<whitespace>]
      37             :                 whitespace ::=  <whitespaceChar> [<whitespace>]
      38             :                 whitespaceChar ::= " " | "\t"
      39             :                 sign ::= "+" | "-"
      40             :                 basicNumber = integer [decimal] | decimal
      41             :                 integer ::= <digit> [<integer>]
      42             :                 digit ::= "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9"
      43             :                 decimal ::= <decimalPoint> <integer>
      44             :                 decimalPoint ::= "."
      45             :                 exponent = <e> [<sign>] <integer>
      46             :                 e ::= "e" | "E"
      47             :         
      48             :         if allowSpaces = NO, the [<whitespace>] terms are excluded.
      49             : */
      50           0 : BOOL OOIsNumberLiteral(NSString *string, BOOL allowSpaces);