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      1 /* Legal characters in GLSL are:
      2  *
      3  * Identifier characters:
      4  *
      5  *     Letters a-z
      6  *     Letters A-Z
      7  *     Underscore
      8  *     Numbers 0-9
      9  *
     10  * Punctuation:
     11  *
     12  *     Period, plus, dash, slash, asterisk, percent, angled brackets,
     13  *     square brackets, parentheses, braces, caret, vertical bar,
     14  *     ampersand, tilde, equals, exclamation point, colon, semicolon,
     15  *     comma, and question mark
     16  *
     17  * Special:
     18  *
     19  *     Number sign (as used in preprocessor)
     20  *
     21  *     Backslash just before newline as line continuation
     22  *
     23  * White space:
     24  *
     25  *     Space, horizontal tab, vertical tab, form feed, carriage-return,
     26  *     and line-feed.
     27  *
     28  * [GLSL Language Specficiation 4.30.6, section 3.1]
     29  *
     30  * In this file, we test each of these in turn as follows:
     31  *
     32  *    Identifier characters: All pass through unchanged
     33  *    Punctuation: All pass through unchanged
     34  *    Special: Empty directive replaced with blank line
     35  *             Line continuation merges two lines, then a blank line
     36  *    Whitespace: 4 horizontal space characters each replaced with space
     37  *                2 newline characters each replaced with a newline
     38  *
     39  */
     40 abcdefghijklmnopqrstuvwxyz
     41 ABCDEFGHIJKMLNOPQRSTUVWXYZ
     42 _
     43 0123456789
     44 .
     45 +
     46 -
     47 /
     48 *
     49 %
     50 <
     51 >
     52 [
     53 ]
     54 (
     55 )
     56 {
     57 }
     58 ^
     59 |
     60 &
     61 ~
     62 =
     63 !
     64 :
     65 ;
     66 ,
     67 ?
     68 #
     69 .\
     70 .
     71 . .
     72 .	.
     73 ..
     75 ..
     77 ..
     78 .
     79 .
     80