Restore split/1; don't use regexp (fix #576)

builtin.c

@@ -1046,7 +1046,6 @@ static const char* const jq_builtins[] = {
   //
   // split emits an array for backward compatibility
   "def split($re; flags): [ splits($re; flags) ];",
-  "def split($re): [ splits($re; null) ];",
   //
   // If s contains capture variables, then create a capture object and pipe it to s
   "def sub($re; s):"

docs/content/3.manual/manual.yml

@@ -1736,7 +1736,7 @@ sections:
       input: ("", "")
       output: ['[]', '[]']
 
-  - title: "`split(regex)`, `split(regex; flags)`"
+  - title: "`split(regex; flags)`"
     body: |
 
       For backwards compatibility, `split` emits an array of the strings
@@ -1746,11 +1746,8 @@ sections:
       themselves are excluded.  If regex is the empty string, then the first
       match will be the empty string.
 
-      `split(regex)` can be thought of as a wrapper around `splits(regex)`,
-      and similarly for `split(regex; flags)`.
-
     example:
-    - program: 'split(", *")'
+    - program: 'split(", *"; null)'
       input: '"ab,cd, ef"'
       output: ['"ab","cd","ef"']
 

tests/all.test

@@ -869,16 +869,16 @@ capture("(?<a>[a-z]+)-(?<n>[0-9]+)")
 
 [.[] | split(", ")]
 ["a,b, c, d, e,f",", a,b, c, d, e,f, "]
-[["a,b","c","d","e,f"],["","a,b","c","d","e,f",""]]
+[["a,b","c","d","e,f"],["","a,b","c","d","e,f"]]
 
 ########################
-[.[]|[[sub(", *";":")], [gsub(", *";":")], [scan(", *")], split(", *")]]
+[.[]|[[sub(", *";":")], [gsub(", *";":")], [scan(", *")]]]
 ["a,b, c, d, e,f",", a,b, c, d, e,f, "]
-[[["a:b, c, d, e,f"],["a:b:c:d:e:f"],[",",", ",", ",", ",","],["a","b","c","d","e","f"]],[[":a,b, c, d, e,f, "],[":a:b:c:d:e:f:"],[", ",",",", ",", ",", ",",",", "],["","a","b","c","d","e","f",""]]]
+[[["a:b, c, d, e,f"],["a:b:c:d:e:f"],[",",", ",", ",", ",","]],[[":a,b, c, d, e,f, "],[":a:b:c:d:e:f:"],[", ",",",", ",", ",", ",",",", "]]]
 
-[.[]|[[sub(", +";":")], [gsub(", +";":")], [scan(", +")], split(", +")]]
+[.[]|[[sub(", +";":")], [gsub(", +";":")], [scan(", +")]]]
 ["a,b, c, d, e,f",", a,b, c, d, e,f, "]
-[[["a,b:c, d, e,f"],["a,b:c:d:e,f"],[", ",", ",", "],["a,b","c","d","e,f"]],[[":a,b, c, d, e,f, "],[":a,b:c:d:e,f:"],[", ",", ",", ",", ",", "],["","a,b","c","d","e,f",""]]]
+[[["a,b:c, d, e,f"],["a,b:c:d:e,f"],[", ",", ",", "]],[[":a,b, c, d, e,f, "],[":a,b:c:d:e,f:"],[", ",", ",", ",", ",", "]]]
 
 # reference to named captures
 gsub("(?<x>.)[^a]*"; "+\(.x)-")