Argument collection and spreading

1 files changed, 71 insertions, 0 deletions

diff --git a/tests/typ/code/spread.typ b/tests/typ/code/spread.typ
new file mode 100644
index 00000000..f1414313
--- /dev/null
+++ b/tests/typ/code/spread.typ
@@ -0,0 +1,71 @@
+// Test argument sinks and spreading.
+// Ref: false
+
+---
+// Test standard argument overriding.
+{
+  let font(style: normal, weight: regular) = {
+    "(style: " + repr(style) + ", weight: " + repr(weight) + ")"
+  }
+
+  let myfont(..args) = font(weight: bold, ..args)
+  test(myfont(), "(style: normal, weight: bold)")
+  test(myfont(weight: 100), "(style: normal, weight: 100)")
+  test(myfont(style: italic), "(style: italic, weight: bold)")
+}
+
+---
+// Test multiple calls.
+{
+  let f(b, c: "!") = b + c
+  let g(a, ..sink) = a + f(..sink)
+  test(g("a", "b", c: "c"), "abc")
+}
+
+---
+// Test storing arguments in a variable.
+{
+  let args
+  let save(..sink) = {
+    args = sink
+  }
+
+  save(1, 2, three: true)
+  test(type(args), "arguments")
+  test(repr(args), "(1, 2, three: true)")
+}
+
+---
+// Test spreading array and dictionary.
+{
+  let more = (3, -3, 6, 10)
+  test(min(1, 2, ..more), -3)
+  test(max(..more, 9), 10)
+  test(max(..more, 11), 11)
+}
+
+{
+  let more = (c: 3, d: 4)
+  let tostr(..args) = repr(args)
+  test(tostr(a: 1, ..more, b: 2), "(a: 1, c: 3, d: 4, b: 2)")
+}
+
+---
+// Error: 8-14 cannot spread string
+#min(.."nope")
+
+---
+// Error: 10-14 expected identifier
+#let f(..true) = none
+
+---
+// Error: 15-16 only one argument sink is allowed
+#let f(..a, ..b) = none
+
+---
+// Error: 5-6 spreading is not allowed here
+{(..x)}
+
+---
+// Error: 11-17 spreading is not allowed here
+{(1, 2, ..(1, 2))}