| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Demo of word evaluation.
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| 4 | #
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| 5 | # Usage:
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| 6 | # ./hard.sh <function name>
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| 7 | #
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| 8 | # Bug with the current algorithm: IFS=\\
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| 9 |
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| 10 | set -- 'a*b' 'c d'
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| 11 | typeset -a myarray
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| 12 | myarray=('w x' 'y*z', 'bin')
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| 13 | space=' '
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| 14 | glob='*h b*' # anything that ends with h, then anything that begins with b
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| 15 |
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| 16 | spec/bin/argv.py -"$@"-$space-"$space-${myarray[@]}"/$glob
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| 17 |
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| 18 | # ['-a b', 'c d-', '- -w x', 'y z,', 'bin/opypy-osh', 'bin/osh', 'bin/sh', 'benchmarks', 'bin', 'build']
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| 19 |
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| 20 | # I have a single word.
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| 21 | # I evaluate all the parts:
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| 22 | #
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| 23 | # "$@" -> ArrayPartValue
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| 24 | # $space -> StringPartValue
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| 25 | # "$space" -> StringPartValue
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| 26 | # $myarray -> ArrayPartValue
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| 27 | # $glob -> StringPartValue
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| 28 | #
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| 29 | # Then I _MakeWordFrames. Each frame is (frag, list)
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| 30 |
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| 31 | # (frag, do_split_elide)
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| 32 | #
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| 33 | # [ ('-a b', False) ]
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| 34 | # [ ('c d', False), ('-', False), (' ', True), ('-', False), (' ', False),
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| 35 | # ('-', False), ('w x', False) ]
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| 36 | # [ ('y z', False) ]
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| 37 | # [ ('bin', False), ('*h b*', True) ]
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| 38 |
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| 39 |
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| 40 | # Then for each frame, do _EvalWordFrame. Respect the boolean, and do
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| 41 | # glob.GlobEscape or self.splitter.Escape(frag)
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| 42 |
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| 43 | # '-a b'
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| 44 | # -> Glob escape
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| 45 | # '-a b'
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| 46 | # -> Split EScape
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| 47 | # '-a\ b'
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| 48 |
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| 49 | # 'c\ d-'
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| 50 | # '-'
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| 51 |
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| 52 | # Possible fix to IFS='\' problem: do globbing and splitting in two completely
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| 53 | # separate steps. The Split() function should respect [(frag, bool do_split) ...]
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| 54 | #
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| 55 | # If not splitting, then it's easy to emit the span.
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| 56 |
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| 57 |
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