source: code/trunk/src/external/tolua/lua/enumerate.lua @ 10140

-- tolua: enumerate class
-- Written by Waldemar Celes
-- TeCGraf/PUC-Rio
-- Jul 1998
-- $Id: enumerate.lua,v 1.3 2000/01/24 20:41:15 celes Exp $

-- This code is free software; you can redistribute it and/or modify it.
-- The software provided hereunder is on an "as is" basis, and
-- the author has no obligation to provide maintenance, support, updates,
-- enhancements, or modifications.


-- Enumerate class
-- Represents enumeration
-- The following fields are stored:
--    {i} = list of constant names
classEnumerate = {
}
classEnumerate.__index = classEnumerate
setmetatable(classEnumerate,classFeature)

-- register enumeration
function classEnumerate:register (pre)
    pre = pre or ''
    local nspace = getnamespace(classContainer.curr)
    local i=1
    while self[i] do
        output(pre..'tolua_constant(tolua_S,"'..self.lnames[i]..'",'..nspace..self[i]..');')
        i = i+1
    end
end

-- Print method
function classEnumerate:print (ident,close)
    print(ident.."Enumerate{")
    print(ident.." name = "..self.name)
    local i=1
    while self[i] do
        print(ident.." '"..self[i].."'("..self.lnames[i].."),")
        i = i+1
    end
    print(ident.."}"..close)
end

-- Internal constructor
function _Enumerate (t,varname)
    setmetatable(t,classEnumerate)
    append(t)
    appendenum(t)
    if varname and varname ~= "" then
        if t.name ~= "" then
            Variable(t.name.." "..varname)
        else
            local ns = getcurrnamespace()
            warning("Variable "..ns..varname.." of type <anonymous enum> is declared as read-only")
            Variable("tolua_readonly int "..varname)
        end
    end
    return t
end

-- Constructor
-- Expects a string representing the enumerate body
function Enumerate (n,b,varname)
    b = string.gsub(b, ",[%s\n]*}", "\n}") -- eliminate last ','
    local t = split(strsub(b,2,-2),',') -- eliminate braces
    local i = 1
    local e = {n=0}
    while t[i] do
        local tt = split(t[i],'=')  -- discard initial value
        e.n = e.n + 1
        e[e.n] = tt[1]
        i = i+1
    end
    -- set lua names
    i  = 1
    e.lnames = {}
    local ns = getcurrnamespace()
    while e[i] do
        local t = split(e[i],'@')
        e[i] = t[1]
        if not t[2] then
            t[2] = applyrenaming(t[1])
        end
        e.lnames[i] = t[2] or t[1]
        _global_enums[ ns..e[i] ] = (ns..e[i])
        i = i+1
    end
    e.name = n
    if n ~= "" then
        Typedef("int "..n)
    end
    return _Enumerate(e, varname)
end