| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ysh/testdata/inline-function-calls.sh <function name>
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| 5 |
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| 6 | shopt -s ysh:upgrade
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| 7 |
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| 8 | source $LIB_YSH/list.ysh
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| 9 |
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| 10 | simple-demo() {
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| 11 | var myarray = %(spam eggs ham)
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| 12 |
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| 13 | echo '+ Call in expression context:'
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| 14 | var length = len(myarray)
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| 15 | echo $length
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| 16 | echo
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| 17 |
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| 18 | echo '+ Inline call that coerces to string:'
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| 19 | write -- $[len(myarray)] $[len("abc")] ''
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| 20 | echo
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| 21 |
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| 22 | echo '+ Inline calls can be part of a word:'
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| 23 | write -- --length=$[len(myarray)] $[len("abc")]$[len("xyz")]
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| 24 | echo
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| 25 |
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| 26 | echo "+ Caveat: can't double quote. It would break programs."
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| 27 | echo " Should we add an option 'shopt -s parse_dparen'?"
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| 28 | echo
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| 29 |
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| 30 | # NOTE: Oil's echo builtin takes --, and requires it here
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| 31 | write -- "--length=$[len(myarray)]"
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| 32 | echo
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| 33 |
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| 34 | echo '+ Just as you can splice @myarray'
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| 35 | write -- @myarray
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| 36 | echo
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| 37 |
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| 38 | var mydict = { 'hello': 0, 'world': 1 }
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| 39 |
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| 40 | echo '+ You can also splice the result of a function returning a sequence:'
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| 41 | echo ' Notes:'
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| 42 | echo ' - the Dict->reverse() method is from Python.'
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| 43 | echo
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| 44 | write -- @[mydict=>keys()]
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| 45 | echo
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| 46 |
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| 47 | # But this is a syntax error
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| 48 | #echo @sorted(myarray)@invalid
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| 49 | }
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| 50 |
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| 51 | split-join-demo() {
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| 52 | var parts = %(aaa BB c)
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| 53 | write -- 'Parts:' @parts
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| 54 | echo
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| 55 |
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| 56 | write 'join(parts):' $[join(parts)]
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| 57 | echo
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| 58 |
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| 59 | echo '+ Another way of doing it, without creating another variable:'
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| 60 | write --sep '' -- @parts
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| 61 | echo
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| 62 |
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| 63 | var j = join(parts, ":")
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| 64 | #var a = split(j)
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| 65 | #repr j a
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| 66 |
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| 67 | write --sep '' "j => " $j
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| 68 | write --sep '' 'When IFS is the default, split(j) => '
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| 69 | write @[split(j)]
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| 70 | echo
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| 71 |
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| 72 | # NOTE: Can't use setvar IFS = ':' here because of static check
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| 73 | # declare or declare -g makes sense
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| 74 | declare IFS=':'
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| 75 | echo 'When IFS is :, split(j) => '
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| 76 | write @[split(j)]
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| 77 | echo
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| 78 |
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| 79 | unset IFS
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| 80 |
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| 81 | echo '+ Since there is no word splitting of unquoted $(ls), here is an idiom:'
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| 82 | write @[split( $(write bin/ lib/ | grep b) )]
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| 83 | }
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| 84 |
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| 85 | types-demo() {
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| 86 | echo 'TODO: bool, int, etc.'
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| 87 | }
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| 88 |
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| 89 | all() {
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| 90 | simple-demo
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| 91 | split-join-demo
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| 92 | }
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| 93 |
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| 94 | "$@"
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