mirror of
https://github.com/go-sylixos/elvish.git
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173 lines
3.5 KiB
Plaintext
173 lines
3.5 KiB
Plaintext
///////////
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# kind-of #
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///////////
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~> kind-of a []
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▶ string
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▶ list
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// bubbling output error
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~> kind-of a >&-
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Exception: port does not support value output
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[tty]:1:1-13: kind-of a >&-
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//////////////
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# constantly #
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//////////////
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~> var f = (constantly foo)
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$f
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▶ foo
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~> $f
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▶ foo
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// bubbling output error
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~> (constantly foo) >&-
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Exception: port does not support value output
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[tty]:1:1-20: (constantly foo) >&-
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////////
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# call #
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////////
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~> call {|arg &opt=v| put $arg $opt } [foo] [&opt=bar]
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▶ foo
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▶ bar
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~> call { } [foo] [&[]=bar]
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Exception: bad value: option key must be string, but is list
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[tty]:1:1-24: call { } [foo] [&[]=bar]
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////////
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# eval #
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////////
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~> eval 'put x'
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▶ x
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## using variable from the local scope ##
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~> var x = foo
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eval 'put $x'
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▶ foo
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## setting a variable in the local scope ##
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~> var x = foo
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eval 'set x = bar'
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put $x
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▶ bar
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## using variable from the upvalue scope ##
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~> var x = foo
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{ nop $x; eval 'put $x' }
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▶ foo
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## using &ns to specify a namespace ##
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~> var n = (ns [&x=foo])
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eval 'put $x' &ns=$n
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▶ foo
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## altering variables in the specified namespace ##
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~> var n = (ns [&x=foo])
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eval 'set x = bar' &ns=$n
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put $n[x]
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▶ bar
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## newly created variables do not appear in the local namespace ##
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~> eval 'x = foo'
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put $x
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Compilation error: variable $x not found
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[tty]:2:5-6: put $x
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## newly created variables do not alter the specified namespace either ##
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~> var n = (ns [&])
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eval &ns=$n 'var x = foo'
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put $n[x]
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Exception: no such key: x
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[tty]:3:5-9: put $n[x]
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## newly created variable can be accessed in the final namespace using &on-end ##
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~> eval &on-end={|n| put $n[x] } 'var x = foo'
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▶ foo
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## parse error ##
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//force-eval-source-count 100
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~> eval '['
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Exception: Parse error: should be ']'
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[eval 100]:1:2: [
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[tty]:1:1-8: eval '['
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## compilation error ##
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//force-eval-source-count 100
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~> eval 'put $x'
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Exception: Compilation error: variable $x not found
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[eval 100]:1:5-6: put $x
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[tty]:1:1-13: eval 'put $x'
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## exception ##
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//force-eval-source-count 100
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~> eval 'fail x'
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Exception: x
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[eval 100]:1:1-6: fail x
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[tty]:1:1-13: eval 'fail x'
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/////////////
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# deprecate #
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/////////////
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~> deprecate msg
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Deprecation: msg
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[tty]:1:1-13: deprecate msg
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## different call sites trigger multiple deprecation messages ##
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~> fn f { deprecate msg }
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~> f
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Deprecation: msg
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[tty]:1:1-1: f
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// Normally, just calling f from the next prompt will result in a different call
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// site because the source will have a different name like "[tty 3]" vs "[tty
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// 2]". But since in tests we always use "[tty]" for the source name, we need to
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// make the call appear on a different position to force it to be recognized as
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// a different call site.
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~> nop; f
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Deprecation: msg
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[tty]:1:6-6: nop; f
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## the same call site only triggers the message once ##
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~> fn f { deprecate msg}
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fn g { f }
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~> g
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Deprecation: msg
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[tty]:2:8-9: fn g { f }
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// See comment above about call site. In this case, the (immediate) call site of
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// f is from g, so even if the call site of g differs, the call site of f is the
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// same.
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~> nop; g
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///////////
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# use-mod #
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///////////
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//tmp-lib-dir
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~> echo 'var x = value' > $lib/mod.elv
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~> put (use-mod mod)[x]
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▶ value
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///////////
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# resolve #
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///////////
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~> resolve for
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▶ special
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~> resolve put
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▶ '$put~'
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~> fn f { }
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resolve f
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▶ '$f~'
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// Unknown commands resolve to an external even if it doesn't exist.
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~> resolve cat
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▶ '(external cat)'
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## module function ##
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//tmp-lib-dir
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~> echo 'fn func { }' > $lib/mod.elv
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~> use mod
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~> resolve mod:func
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▶ '$mod:func~'
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