Rename functions to match others

share/functions/__fish_complete_clang.fish

@@ -0,0 +1,16 @@
+# This function is compatible with clang, clang++, and variations thereof, and is shared
+# by clang.fish and clang++.fish.
+# We dynamically query the head at `(commandline -o)[1]` to get the correct completions.
+function __fish_complete_clang
+    # If the result is for a value, clang only prints the value, so completions
+    # for `-std=` print `c++11` and not `-std=c++11` like we need. See #4174.
+    set -l prefix (commandline -ct | string replace -fr -- '^(.*=)[^=]*' '$1')
+
+    # Don't hard-code the name of the clang binary
+    set -l clang (commandline -o)[1]
+    # first get the completions from clang, with the prefix separated from the value by a comma
+    $clang --autocomplete=(commandline -ct | string unescape | string replace -- "$prefix" "$prefix,") 2>/dev/null |
+    # and put it in a format that fish understands
+    string replace -r -- '^([^ ]+)\s*(.*)' "$prefix\$1\t\$2"
+end
+