On Tue, Sep 20, 2011 at 1:22 PM, Thijs Schreijer <thijs@thijsschreijer.nl> wrote:
Probably a stupid thingy, but can't seem to get it;
This code (part of a larger object)
20 -- add a filter to my list, no duplicates will be added, flt is
string or table
21 add = function (self, flt)
22 if type(flt) == "string" then
23 flt = self:split(flt)
24 end
25 assert(type(flt) == "table", "cannot add filter, string or
table expected, got " .. type (flt))
26 if not flt.filter then
27 flt.filter = string.concat(flt, ".")
28 end
29 if not self.filters[flt.filter] then -- only add if not in
the list already
30 self.filters[flt.filter] = flt
31 end
32 end,
When called with this test;
133 local s = pcall(filters:add(123))
134 assert( not s, "error expected because of a number")
Gives me this error;
lua: xplfilter.lua:25: cannot add filter, string or table expected, got
number
stack traceback:
[C]: in function 'assert'
xplfilter.lua:25: in function 'add'
xplfilter.lua:133: in main chunk
[C]: ?
Question is; The error is obvious, but why doesn't the pcall on line 133
catch the error and return true in local s?
Lua for windows, code uses only 1 external require; "loop.simple" for the
object creation.
You are invoking the function before allowing pcall() to do its thing.
You probably want this:
local s = pcall(add, filters, 123)
This invokes the function add on the remaining arguments in a protected manner.
Robby
