elvish/pkg/eval/compile_value_test.elvts

////////////
# compound #
////////////

~> put {fi,elvi}sh{1.0,1.1}
▶ fish1.0
▶ fish1.1
▶ elvish1.0
▶ elvish1.1

## empty compound evaluates to '' ##
~> put {}
▶ ''
~> put [&k=][k]
▶ ''

## exception from any component is propagated ##
~> put a{[][1]}
Exception: out of range: index must be from 0 to -1, but is 1
  [tty]:1:7-11: put a{[][1]}

## error in concatenating the values throws an exception ##
~> put []a
Exception: cannot concatenate list and string
  [tty]:1:5-7: put []a

## error when applying tilde throws an exception ##
~> put ~[]
Exception: tilde doesn't work on value of type list
  [tty]:1:5-7: put ~[]

////////////
# indexing #
////////////

~> put [a b c][2]
▶ c
~> put [][0]
Exception: out of range: index must be from 0 to -1, but is 0
  [tty]:1:5-9: put [][0]
~> put [&key=value][key]
▶ value
~> put [&key=value][bad]
Exception: no such key: bad
  [tty]:1:5-21: put [&key=value][bad]
~> put (fail x)[a]
Exception: x
  [tty]:1:6-11: put (fail x)[a]
~> put [foo][(fail x)]
Exception: x
  [tty]:1:12-17: put [foo][(fail x)]

////////////////
# list literal #
////////////////

~> put [a b c]
▶ [a b c]
~> put []
▶ []

## exception from element expression is propagated ##
~> put [ [][0] ]
Exception: out of range: index must be from 0 to -1, but is 0
  [tty]:1:7-11: put [ [][0] ]

///////////////
# map literal #
///////////////

~> put [&key=value]
▶ [&key=value]
~> put [&]
▶ [&]
// Keys and values may evaluate to multiple values as long as their numbers
// match.
~> put [&{a b}={foo bar}]
▶ [&a=foo &b=bar]

## exception from key or value is propagated ##
~> put [ &[][0]=a ]
Exception: out of range: index must be from 0 to -1, but is 0
  [tty]:1:8-12: put [ &[][0]=a ]
~> put [ &a=[][0] ]
Exception: out of range: index must be from 0 to -1, but is 0
  [tty]:1:10-14: put [ &a=[][0] ]

## error if number of keys and values in a single pair does not match ##
~> put [&{a b}={foo bar lorem}]
Exception: 2 keys but 3 values
  [tty]:1:6-27: put [&{a b}={foo bar lorem}]

//////////////////
# string literal #
//////////////////

~> put 'such \"''literal'
▶ 'such \"''literal'
~> put "much \n\033[31;1m$cool\033[m"
▶ "much \n\e[31;1m$cool\e[m"

/////////
# tilde #
/////////

//with-temp-home

~> eq ~ $E:HOME
▶ $true
~> eq ~/src $E:HOME/src
▶ $true
// Trailing slash is retained
~> eq ~/src/ $E:HOME/src/
▶ $true

## tilde and wildcard ##
~> echo > ~/file1
   echo > ~/file2
~> eq [~/*] [~/file1 ~/file2]
▶ $true

## ~other doesn't add superfluous trailing slash ##
// Regression test for b.elv.sh/1246
//mock-one-other-home
~> eq ~other $other-home
▶ $true

## ~other and glob ##
// Regression test for b.elv.sh/793
//mock-one-other-home
~> echo > $other-home/file1
   echo > $other-home/file2
~> eq [~other/*] [$other-home/file1 $other-home/file2]
▶ $true

## unknown user ##
//mock-no-other-home
~> put ~bad/*
Exception: don't know home of bad
  [tty]:1:5-10: put ~bad/*

## ~* is an error ##
// TODO: This should be a compilation error
~> put ~*
Exception: cannot determine user name from glob pattern
  [tty]:1:5-6: put ~*

## error in GetHome ##
//mock-get-home-error fake error
~> put ~
Exception: fake error
  [tty]:1:5-5: put ~
~> put ~/foo
Exception: fake error
  [tty]:1:5-9: put ~/foo
~> put ~/*
Exception: fake error
  [tty]:1:5-7: put ~/*

////////////
# wildcard #
////////////

~> put ***
Compilation error: bad wildcard: "***"
  [tty]:1:5-7: put ***

// More tests in glob_test.elvts

//////////////////
# output capture #
//////////////////

~> put (put lorem ipsum)
▶ lorem
▶ ipsum
~> put (print "lorem\nipsum")
▶ lorem
▶ ipsum
// \r\n is also supported as a line separator
~> print "lorem\r\nipsum\r\n" | all
▶ lorem
▶ ipsum

/////////////////////
# exception capture #
/////////////////////

## Exception capture ##
~> bool ?(nop)
▶ $true
~> bool ?(e:false)
▶ $false

////////////////
# variable use #
////////////////

## basic usage ##
~> var x = foo
   put $x
▶ foo

## must exist before use ##
~> put $x
Compilation error: variable $x not found
  [tty]:1:5-6: put $x
~> put $x[0]
Compilation error: variable $x not found
  [tty]:1:5-6: put $x[0]

## variable use in compound expr ##
~> var x = world
   put 'Hello, '$x'!'
▶ 'Hello, world!'

## exploding with $@ ##
~> var x = [elvish rules]
   put $@x
▶ elvish
▶ rules

## unqualified name resolves to local name before upvalue ##
~> var x = outer; { var x = inner; put $x }
▶ inner

## unqualified name resolves to upvalue if no local name exists ##
~> var x = outer; { put $x }
▶ outer

## unqualified name resolves to builtin if no local name or upvalue exists ##
~> put $true
▶ $true

## names like $:foo are reserved for now. ##
~> var x = val; put $:x
Compilation error: variable $:x not found
  [tty]:1:18-20: var x = val; put $:x

## pseudo-namespace E: for environment variables ##
//unset-env x
~> set-env x value
   put $E:x
▶ value
~> set E:x = new-value
   get-env x
▶ new-value

## colons after E: are part of the variable name ##
//unset-env a:b
~> set-env a:b value
   put $E:a:b
▶ value
~> set E:a:b = new-value
   get-env a:b
▶ new-value

## pseudo-namespace e: for external commands ##
// Resolution always succeeds regardless of whether the command exists
~> put $e:true~
▶ <external true>
// Colons are always considered part of the name
~> put $e:a:b~
▶ <external a:b>

## namespace access ##
~> var ns: = (ns [&a= val])
   put $ns:a
▶ val

## multi-level namespace access ##
~> var ns: = (ns [&a:= (ns [&b= val])])
   put $ns:a:b
▶ val

## module name access is checked at runtime ##
//use-os
~> put $os:non-existent-variable
Exception: variable $os:non-existent-variable not found
  [tty]:1:5-29: put $os:non-existent-variable

///////////
# closure #
///////////

~> {|| }
~> {|x| put $x} foo
▶ foo

## assigning to captured variable ##
~> var x = lorem; {|| put $x; set x = ipsum }; put $x
▶ lorem
▶ ipsum

## Assigning to element of captured variable ##
~> var x = [a]; { set x[0] = b }; put $x[0]
▶ b

## shadowing ##
~> var x = ipsum; { var x = lorem; put $x }; put $x
▶ lorem
▶ ipsum

## shadowing by argument ##
~> var x = ipsum; {|x| put $x; set x = BAD } lorem; put $x
▶ lorem
▶ ipsum

## closure semantics ##
~> fn f {
     var x = (num 0)
     put { set x = (+ $x 1) } { put $x }
   }
~> var inc1 put1 = (f); $put1; $inc1; $put1
▶ (num 0)
▶ (num 1)
~> var inc2 put2 = (f); $put2; $inc2; $put2
▶ (num 0)
▶ (num 1)

## rest argument. ##
~> {|x @xs| put $x $xs } a b c
▶ a
▶ [b c]
~> {|a @b c| put $a $b $c } a b c d
▶ a
▶ [b c]
▶ d

## options ##
~> {|a &k=v| put $a $k } foo &k=bar
▶ foo
▶ bar

## option default value ##
~> {|a &k=v| put $a $k } foo
▶ foo
▶ v

## option must have default value ##
~> {|&k| }
Compilation error: option must have default value
  [tty]:1:4-4: {|&k| }

## exception when evaluating option default value ##
~> {|&a=[][0]| }
Exception: out of range: index must be from 0 to -1, but is 0
  [tty]:1:6-10: {|&a=[][0]| }

## option default value must be one value ##
~> {|&a=(put foo bar)| }
Exception: arity mismatch: option default value must be 1 value, but is 2 values
  [tty]:1:6-18: {|&a=(put foo bar)| }

## argument name must be unqualified ##
~> {|a:b| }
Compilation error: argument name must be unqualified
  [tty]:1:3-5: {|a:b| }

## argument name must not be empty ##
~> {|''| }
Compilation error: argument name must not be empty
  [tty]:1:3-4: {|''| }
~> {|@| }
Compilation error: argument name must not be empty
  [tty]:1:3-3: {|@| }

## option name must be unqualified ##
~> {|&a:b=1| }
Compilation error: option name must be unqualified
  [tty]:1:4-6: {|&a:b=1| }

## option name must not be empty ##
~> {|&''=b| }
Compilation error: option name must not be empty
  [tty]:1:4-5: {|&''=b| }

## should not have multiple rest arguments ##
~> {|@a @b| }
Compilation error: only one argument may have @ prefix
  [tty]:1:6-7: {|@a @b| }