forbid underscore as identifier closes #513 (#837)

2 files changed, 24 insertions, 0 deletions

diff --git a/tests/typ/compiler/closure.typ b/tests/typ/compiler/closure.typ
index 915de850..2d12a2bc 100644
--- a/tests/typ/compiler/closure.typ
+++ b/tests/typ/compiler/closure.typ
@@ -170,3 +170,7 @@
 ---
 // Error: 10-14 expected identifier, found `none`
 #let foo(none: b) = key
+
+---
+// Error: 11 expected comma
+#let foo(_: 3) = none
diff --git a/tests/typ/compiler/let.typ b/tests/typ/compiler/let.typ
index 70657617..160d2147 100644
--- a/tests/typ/compiler/let.typ
+++ b/tests/typ/compiler/let.typ
@@ -222,6 +222,26 @@ Three
 #let (..true) = false
 
 ---
+#let _ = 4
+
+#for _ in range(2) []
+
+// Error: 2-3 unexpected underscore
+#_
+
+// Error: 8-9 unexpected underscore
+#lorem(_)
+
+// Error: 3-4 expected expression, found underscore
+#(_,)
+
+// Error: 3-4 expected expression, found underscore
+#{_}
+
+// Error: 8-9 expected expression, found underscore
+#{ 1 + _ }
+
+---
 // Error: 13 expected equals sign
 #let func(x)