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varmod-match.mk revision 1.3 
      1  1.3  rillig # $NetBSD: varmod-match.mk,v 1.3 2020/08/16 20:03:53 rillig Exp $
      2  1.1  rillig #
      3  1.2  rillig # Tests for the :M variable modifier, which filters words that match the
      4  1.2  rillig # given pattern.
      5  1.1  rillig 
      6  1.3  rillig all: match-char-class
      7  1.3  rillig all: slow
      8  1.1  rillig 
      9  1.3  rillig 
     10  1.3  rillig NUMBERS=	One Two Three Four five six seven
     11  1.3  rillig 
     12  1.3  rillig match-char-class:
     13  1.3  rillig 	@echo '$@:'
     14  1.3  rillig 	@echo '  uppercase numbers: ${NUMBERS:M[A-Z]*}'
     15  1.3  rillig 	@echo '  all the others: ${NUMBERS:M[^A-Z]*}'
     16  1.3  rillig 	@echo '  starts with non-s, ends with [ex]: ${NUMBERS:M[^s]*[ex]}'
     17  1.3  rillig 
     18  1.3  rillig 
     19  1.3  rillig # Before 2020-06-13, this expression took quite a long time in Str_Match,
     20  1.3  rillig # calling itself 601080390 times for 16 asterisks.
     21  1.3  rillig slow:
     22  1.3  rillig 	@: ${:U****************:M****************b}
     23