add koka language support (#8727)

Co-authored-by: Pascal Kuthe <pascal.kuthe@semimod.de>

1 files changed, 39 insertions, 0 deletions

diff --git a/runtime/queries/koka/indents.scm b/runtime/queries/koka/indents.scm
new file mode 100644
index 00000000..0a47bcbb
--- /dev/null
+++ b/runtime/queries/koka/indents.scm
@@ -0,0 +1,39 @@
+[
+  (appexpr ["[" "("]) ; Applications.
+  (ntlappexpr ["[" "("])
+  (atom ["[" "("]) ; Lists and tuples.
+  (program (moduledecl "{")) ; Braced module declarations.
+  (funbody)
+  (block)
+  (handlerexpr)
+  (opclausex)
+] @indent
+
+[
+  (typedecl
+    [(typeid) (opdecls)]) ; Avoid matching single-operation effects.
+  (externdecl)
+  (matchexpr)
+  (matchrule)
+
+  ; For ifexprs, branches (once they exist) will contain blocks if they're
+  ; indented so we just need to make sure the initial indent happens when we're
+  ; creating them.
+  "then"
+  "else"
+] @indent @extend
+
+(matchrule "->" @indent @extend)
+
+; Handling for error recovery.
+(ERROR "fun") @indent @extend
+(ERROR "match") @indent @extend
+(ERROR "->" @indent.always @extend)
+
+; Don't outdent on function parameter declarations.
+(atom ")" @outdent @extend.prevent-once)
+
+[
+  "]"
+  "}"
+] @outdent @extend.prevent-once