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author | David Thornley <david.thornley@touchstargroup.com> | 2016-05-11 13:28:53 +1000 |
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committer | Jo-Philipp Wich <jo@mein.io> | 2016-05-13 17:03:53 +0200 |
commit | da0226fa7eece0b87bcc04d79bd1a9b198d09fd0 (patch) | |
tree | a5eba82f18841740e3fe480891fd7230656f4522 /package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch | |
parent | 45e0f8b82645faaeea35256c1def0f7706b495ba (diff) | |
download | master-31e0f0ae-da0226fa7eece0b87bcc04d79bd1a9b198d09fd0.tar.gz master-31e0f0ae-da0226fa7eece0b87bcc04d79bd1a9b198d09fd0.tar.bz2 master-31e0f0ae-da0226fa7eece0b87bcc04d79bd1a9b198d09fd0.zip |
lua: Fixed broken __lt/__le operators caused by lnum patch.
This was found while investigating why luarocks does not work. It was
traced to a quite old lnum patch for 5.1.3. I compared against the
latest 5.1.4 patch - https://github.com/LuaDist/lualnum and discovered
the lessthan/lessequal evaluation was not falling through to the
call_orderTM (tag methods).
I have tested LuCI (simple tests) and used the following lua code to
validate the patch (both host and target patches supplied): -
> local my_mt = {
> __eq = function(v1, v2)
> print("__eq")
> return false
> end,
> __lt = function(v1, v2)
> print("__lt")
> return false
> end,
> __le = function(v1, v2)
> print("__le")
> return false
> end
> }
>
> function get_my(vstring)
> local my = {}
> my.string = vstring;
> setmetatable(my, my_mt);
> return my;
> end
>
> local a = get_my("1.0")
> local b = get_my("1.0")
>
> local eq_works = a == b;
> local lt_works = a < b;
> local gt_works = a > b;
>
> local lte_works = a <= b;
> local gte_works = a >= b;
Without the patch the following error will be presented: -
“attempt to compare two table values”
Signed-off-by: David Thornley <david.thornley@touchstargroup.com>
Diffstat (limited to 'package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch')
-rw-r--r-- | package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch b/package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch new file mode 100644 index 0000000000..937fc137e8 --- /dev/null +++ b/package/utils/lua/patches/012-lnum-fix-ltle-relational-operators.patch @@ -0,0 +1,22 @@ +--- a/src/lvm.c ++++ b/src/lvm.c +@@ -284,7 +284,8 @@ int luaV_lessthan (lua_State *L, const T + else + return luai_numlt( nvalue_fast(l), cast_num(ivalue(r)) ); + +- } else if ((res = call_orderTM(L, l, r, TM_LT)) != -1) ++ } ++ if ((res = call_orderTM(L, l, r, TM_LT)) != -1) + return res; + + return luaG_ordererror(L, l, r); +@@ -322,7 +323,8 @@ static int lessequal (lua_State *L, cons + else + return luai_numle( nvalue_fast(l), cast_num(ivalue(r)) ); + +- } else if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */ ++ } ++ if ((res = call_orderTM(L, l, r, TM_LE)) != -1) /* first try `le' */ + return res; + else if ((res = call_orderTM(L, r, l, TM_LT)) != -1) /* else try `lt' */ + return !res; |