eliminate explicit use of string module

1 files changed, 5 insertions, 5 deletions

diff --git a/acf/path.lua b/acf/path.lua
index 4df0350..d824141 100644
--- a/acf/path.lua
+++ b/acf/path.lua
@@ -13,7 +13,7 @@ M.wildcard = {}
 local special = {['..']=up, ['*']=M.wildcard}
 
 
-function M.is_absolute(path) return string.sub(path, 1, 1) == '/' end
+function M.is_absolute(path) return path:sub(1, 1) == '/' end
 
 
 function M.escape(comp)
@@ -21,7 +21,7 @@ function M.escape(comp)
       if comp == item then return symbol end
    end
    if type(comp) == 'number' then return tostring(comp) end
-   local res = string.gsub(comp, '([\\/])', '\\%1')
+   local res = comp:gsub('([\\/])', '\\%1')
    return (special[res] or tonumber(res)) and '\\'..res or res
 end
 
@@ -49,7 +49,7 @@ function M.split(path)
    end
 
    while true do
-      local prefix, sep, suffix = string.match(path, '([^\\/]*)([\\/])(.*)')
+      local prefix, sep, suffix = path:match('([^\\/]*)([\\/])(.*)')
       if not prefix then
 	 merge(comp..path)
 	 return res
@@ -57,9 +57,9 @@ function M.split(path)
 
       comp = comp..prefix
       if sep == '\\' then
-	 comp = comp..string.sub(suffix, 1, 1)
+	 comp = comp..suffix:sub(1, 1)
 	 escaped = true
-	 path = string.sub(suffix, 2, -1)
+	 path = suffix:sub(2, -1)
       else
 	 merge(comp)
 	 comp = ''