Trim util

4 files changed, 10 insertions, 23 deletions

@@ -2,11 +2,9 @@
 
 local dump = require("dump")
 local type = require("type")
-local utf8 = require("utf8")
-local null = type.null
 local assert_arity, assert_type = type.assert_arity, type.assert_type
-local util = require("util")
-local error = util.error
+local null = type.null
+local error = require("util").error
 
 local function fold (kons, knil, r)
         if r == null then
@@ -111,7 +109,7 @@ end
 env["integer->char"] = function (r)
         assert_arity(r,1,1)
         assert_type(r[1], "number") -- todo: check integer
-        return type.character(utf8.char(r[1]))
+        return type.character(r[1])
 end
 
 env["string->list"] = function (r)
@@ -4,7 +4,8 @@ local m = {}
 local type = require("type")
 local eof, input_port = type.eof, type.input_port
 local util = require("util")
-local constantly, error, pop = util.constantly, util.error, util.pop
+local error, pop = util.error, util.pop
+local utf8_char = require("utf8").char
 
 local token_separators = "[%s#()\"'`,@;]"
 
@@ -127,7 +128,7 @@ local function consume_string_hexvalue (cs)
                 table.insert(u8ch, c)
         until c == ";"
         table.remove(u8ch) -- discard ';'
-        return utf8.char(tonumber(table.concat(u8ch), 16)), cs
+        return utf8_char(tonumber(table.concat(u8ch), 16)), cs
 end
 
 local function consume_string (cs)
@@ -258,7 +259,7 @@ m.readmacros = {
                         table.insert(Q, m.read(port))
                         return type.list(Q)
                 end,
-        comment = constantly(nil), -- throw comments away
+        comment = function (_,_,_) return nil end,
 }
 
 ---[[ READ ]]---
@@ -7,8 +7,9 @@
 
 local m = {}
 local utf8 = require("utf8")
-local util = require("util")
-local tochars, error, constantly = util.tochars, util.error, util.constantly
+local utf8_char, utf8_codepoint, utf8_codes =
+        utf8.char, utf8.codepoint, utf8.codes
+local error = require("util").error
 
 ---[[ ATOMIC TYPES ]]---
 
@@ -2,7 +2,6 @@
 
 local m = {}
 local string = string
-local utf8 = require("utf8")
 
 m.luaerror = error
 
@@ -23,17 +22,5 @@ function m.pop (tbl)
         return table.remove(tbl, 1)
 end
 
-function m.tochars (str)
-        local cs = {}
-        for _, code in utf8.codes(str) do
-                table.insert(cs, code)
-        end
-        return cs
-end
-
-function m.constantly (x)
-        return function () return x end
-end
-
 --------
 return m