//go-fns-mod-in-global

///////////
# nullary #
///////////

~> go-fns:nullary

////////////
# argument #
////////////

~> go-fns:takes-two-strings lorem ipsum
a = "lorem", b = "ipsum"
~> go-fns:takes-variadic-strings lorem ipsum
args = ["lorem" "ipsum"]
~> go-fns:takes-string-and-variadic-strings lorem ipsum
first = "lorem", more = ["ipsum"]
~> go-fns:takes-int-float64 314 1.25
i = 314, f = 1.25

## wrong number of arguments ##
~> go-fns:nullary foo
Exception: arity mismatch: arguments must be 0 values, but is 1 value
  [tty]:1:1-18: go-fns:nullary foo
~> go-fns:takes-two-strings foo
Exception: arity mismatch: arguments must be 2 values, but is 1 value
  [tty]:1:1-28: go-fns:takes-two-strings foo
~> go-fns:takes-string-and-variadic-strings
Exception: arity mismatch: arguments must be 1 or more values, but is 0 values
  [tty]:1:1-40: go-fns:takes-string-and-variadic-strings

## wrong argument type ##
~> go-fns:takes-two-strings foo []
Exception: wrong type for arg #1: wrong type: need string, got list
  [tty]:1:1-31: go-fns:takes-two-strings foo []
~> go-fns:takes-int-float64 foo 1.2
Exception: wrong type for arg #0: cannot parse as integer: foo
  [tty]:1:1-32: go-fns:takes-int-float64 foo 1.2

//////////
# inputs #
//////////

~> go-fns:takes-input [foo bar]
input: foo
input: bar
~> put foo bar | go-fns:takes-input
input: foo
input: bar

///////////
# options #
///////////

## parsed options ##
~> go-fns:takes-options &foo=lorem
opts = eval_test.someOptions{Foo:"lorem", Bar:"default"}
~> go-fns:takes-options &foo=lorem &bar=ipsum
opts = eval_test.someOptions{Foo:"lorem", Bar:"ipsum"}

## RawOptions ##
~> go-fns:takes-raw-options &foo=ipsum
opts = eval.RawOptions{"foo":"ipsum"}
~> go-fns:takes-raw-options &foo=ipsum &bar=ipsum
opts = eval.RawOptions{"bar":"ipsum", "foo":"ipsum"}

## errors ##
~> go-fns:nullary &foo=lorem
Exception: function does not accept any options
  [tty]:1:1-25: go-fns:nullary &foo=lorem
// Regression tests for b.elv.sh/958.
~> go-fns:takes-options &bad=value
Exception: unknown option: bad
  [tty]:1:1-31: go-fns:takes-options &bad=value

/////////////////
# return values #
/////////////////

~> go-fns:returns-string
▶ 'a string'
~> go-fns:returns-int
▶ (num 233)
~> go-fns:returns-small-big-int
▶ (num 233)
~> go-fns:returns-slice
▶ foo
▶ bar
~> go-fns:returns-array
▶ foo
▶ bar
// Named type with underlying slice type is not treated as slices
~> go-fns:returns-named-slice-type
▶ <unknown [foo bar]>

////////////////
# error return #
////////////////

~> go-fns:returns-non-nil-error
Exception: bad
  [tty]:1:1-28: go-fns:returns-non-nil-error
~> go-fns:returns-nil-error