1 files changed, 0 insertions, 137 deletions
diff --git a/pl/compat.lua b/pl/compat.lua
deleted file mode 100644
index 7959ac3..0000000
--- a/pl/compat.lua
+++ /dev/null
@@ -1,137 +0,0 @@
-----------------
---- Lua 5.1/5.2 compatibility
--- Ensures that `table.pack` and `package.searchpath` are available
--- for Lua 5.1 and LuaJIT.
--- The exported function `load` is Lua 5.2 compatible.
--- `compat.setfenv` and `compat.getfenv` are available for Lua 5.2, although
--- they are not always guaranteed to work.
--- @module pl.compat
-
-local compat = {}
-
-compat.lua51 = _VERSION == 'Lua 5.1'
-
---- execute a shell command.
--- This is a compatibility function that returns the same for Lua 5.1 and Lua 5.2
--- @param cmd a shell command
--- @return true if successful
--- @return actual return code
-function compat.execute (cmd)
-    local res1,res2,res2 = os.execute(cmd)
-    if compat.lua51 then
-        return res1==0,res1
-    else
-        return not not res1,res2
-    end
-end
-
-----------------
--- Load Lua code as a text or binary chunk.
--- @param ld code string or loader
--- @param[opt] source name of chunk for errors
--- @param[opt] mode 'b', 't' or 'bt'
--- @param[opt] env environment to load the chunk in
--- @function compat.load
-
----------------
--- Get environment of a function.
--- With Lua 5.2, may return nil for a function with no global references!
--- Based on code by [Sergey Rozhenko](http://lua-users.org/lists/lua-l/2010-06/msg00313.html)
--- @param f a function or a call stack reference
--- @function compat.setfenv
-
----------------
--- Set environment of a function
--- @param f a function or a call stack reference
--- @param env a table that becomes the new environment of `f`
--- @function compat.setfenv
-
-if compat.lua51 then -- define Lua 5.2 style load()
-    if not tostring(assert):match 'builtin' then -- but LuaJIT's load _is_ compatible
-        local lua51_load = load
-        function compat.load(str,src,mode,env)
-            local chunk,err
-            if type(str) == 'string' then
-                if str:byte(1) == 27 and not (mode or 'bt'):find 'b' then
-                    return nil,"attempt to load a binary chunk"
-                end
-                chunk,err = loadstring(str,src)
-            else
-                chunk,err = lua51_load(str,src)
-            end
-            if chunk and env then setfenv(chunk,env) end
-            return chunk,err
-        end
-    else
-        compat.load = load
-    end
-    compat.setfenv, compat.getfenv = setfenv, getfenv
-else
-    compat.load = load
-    -- setfenv/getfenv replacements for Lua 5.2
-    -- by Sergey Rozhenko
-    -- http://lua-users.org/lists/lua-l/2010-06/msg00313.html
-    -- Roberto Ierusalimschy notes that it is possible for getfenv to return nil
-    -- in the case of a function with no globals:
-    -- http://lua-users.org/lists/lua-l/2010-06/msg00315.html
-    function compat.setfenv(f, t)
-        f = (type(f) == 'function' and f or debug.getinfo(f + 1, 'f').func)
-        local name
-        local up = 0
-        repeat
-            up = up + 1
-            name = debug.getupvalue(f, up)
-        until name == '_ENV' or name == nil
-        if name then
-            debug.upvaluejoin(f, up, function() return name end, 1) -- use unique upvalue
-            debug.setupvalue(f, up, t)
-        end
-        if f ~= 0 then return f end
-    end
-
-    function compat.getfenv(f)
-        local f = f or 0
-        f = (type(f) == 'function' and f or debug.getinfo(f + 1, 'f').func)
-        local name, val
-        local up = 0
-        repeat
-            up = up + 1
-            name, val = debug.getupvalue(f, up)
-        until name == '_ENV' or name == nil
-        return val
-    end
-end
-
---- Lua 5.2 Functions Available for 5.1
--- @section lua52
-
---- pack an argument list into a table.
--- @param ... any arguments
--- @return a table with field n set to the length
--- @return the length
--- @function table.pack
-if not table.pack then
-    function table.pack (...)
-        return {n=select('#',...); ...}
-    end
-end
-
-------
--- return the full path where a Lua module name would be matched.
--- @param mod module name, possibly dotted
--- @param path a path in the same form as package.path or package.cpath
--- @see path.package_path
--- @function package.searchpath
-if not package.searchpath then
-    local sep = package.config:sub(1,1)
-    function package.searchpath (mod,path)
-        mod = mod:gsub('%.',sep)
-        for m in path:gmatch('[^;]+') do
-            local nm = m:gsub('?',mod)
-            local f = io.open(nm,'r')
-            if f then f:close(); return nm end
-        end
-    end
-end
-
-return compat