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// Test for loops.
// Ref: false
---
// Ref: true
// Empty array.
#for x in () [Nope]
// Dictionary is traversed in insertion order.
// Should output `Name: Typst. Age: 2.`.
#for (k, v) in (Name: "Typst", Age: 2) [
#k: #v.
]
// Block body.
// Should output `[1st, 2nd, 3rd, 4th]`.
#{
"["
for v in (1, 2, 3, 4) {
if v > 1 [, ]
[#v]
if v == 1 [st]
if v == 2 [nd]
if v == 3 [rd]
if v >= 4 [th]
}
"]"
}
// Content block body.
// Should output `2345`.
#for v in (1, 2, 3, 4, 5, 6, 7) [#if v >= 2 and v <= 5 { repr(v) }]
// Map captured arguments.
#let f1(..args) = args.pos().map(repr)
#let f2(..args) = args.named().pairs().map(p => repr(p.first()) + ": " + repr(p.last()))
#let f(..args) = (f1(..args) + f2(..args)).join(", ")
#f(1, a: 2)
---
#let out = ()
// Values of array.
#for v in (1, 2, 3) {
out += (v,)
}
// Indices and values of array.
#for (i, v) in ("1", "2", "3").enumerate() {
test(repr(i + 1), v)
}
// Pairs of dictionary.
#for v in (a: 4, b: 5) {
out += (v,)
}
// Keys and values of dictionary.
#for (k, v) in (a: 6, b: 7) {
out += (k,)
out += (v,)
}
#test(out, (1, 2, 3, ("a", 4), ("b", 5), "a", 6, "b", 7))
// Grapheme clusters of string.
#let first = true
#let joined = for c in "abc👩👩👦👦" {
if not first { ", " }
first = false
c
}
#test(joined, "a, b, c, 👩👩👦👦")
// Return value.
#test(for v in "" [], none)
#test(type(for v in "1" []), "content")
---
// Uniterable expression.
// Error: 11-15 cannot loop over boolean
#for v in true {}
---
// Keys and values of strings.
// Error: 6-12 cannot destructure values of string
#for (k, v) in "hi" {
dont-care
}
---
// Destructuring without parentheses.
// Error: 7 expected keyword `in` - did you mean to use a destructuring pattern?
#for k, v in (a: 4, b: 5) {
dont-care
}
// Error: 5 expected identifier
#for
// Error: 5 expected identifier
#for//
// Error: 6 expected identifier
#{for}
// Error: 7 expected keyword `in`
#for v
// Error: 10 expected expression
#for v in
// Error: 15 expected block
#for v in iter
// Error: 5 expected identifier
#for
v in iter {}
// Error: 6 expected identifier
// Error: 10 expected block
A#for "v" thing
// Error: 5 expected identifier
#for "v" in iter {}
// Error: 7 expected keyword `in`
#for a + b in iter {}
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