aboutsummaryrefslogtreecommitdiffhomepage
path: root/docs/wiki_src/coding/prefix.md
diff options
context:
space:
mode:
Diffstat (limited to 'docs/wiki_src/coding/prefix.md')
-rw-r--r--docs/wiki_src/coding/prefix.md8
1 files changed, 7 insertions, 1 deletions
diff --git a/docs/wiki_src/coding/prefix.md b/docs/wiki_src/coding/prefix.md
index 589e081..64f36e9 100644
--- a/docs/wiki_src/coding/prefix.md
+++ b/docs/wiki_src/coding/prefix.md
@@ -11,7 +11,7 @@ Example:
``` bruijn
# defines a negation prefix function called '-'
--‣ [(+0) - 0]
+-‣ [(+0) - 0] ⧗ Number → Number
# returns 0 - 10 = -10
:test (-(+10)) ((-10))
@@ -23,3 +23,9 @@ literally:
``` bruijn
:test (-‣ (+10)) ((-10))
```
+
+## Allowed characters
+
+Prefix functions can use any characters of `!?*@:;+-_#$%^&<>/\|{}~=` as
+well as mathematical unicode operators and arrows. They must be at least
+1 character long.