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Lunatic: more complex gamevar-decl code.

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git-svn-id: https://svn.eduke32.com/eduke32@2534 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2012-03-25 22:01:36 +00:00
parent b897a59d82
commit ef7ad7b554
1 changed files with 23 additions and 3 deletions
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26
polymer/eduke32/source/lunatic/defs.ilua
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@ -24,7 +24,8 @@ typedef struct
typedef struct
{
int32_t x, y;
const int16_t point2, nextwall, nextsector; int16_t cstat;
const int16_t point2, nextwall, nextsector;
int16_t cstat;
int16_t picnum, overpicnum;
int8_t shade;
uint8_t pal, xrepeat, yrepeat, xpanning, ypanning;
@ -566,9 +567,28 @@ function getbunch(sectnum, cf)
end
-- 'simple' code for prohibiting initial assignments to create new variables,
-- from 14.2 of PiL
-- code for prohibiting initial assignments to create new variables,
-- based on 14.2 of PiL
function gamevar(name, initval) -- aka 'declare'
local declaredNames = {}
if (type(name) ~= "string") then
error("First argument to 'gamevar' must be a string", 2);
end
if (~string.match(name, "^[%a_][%w_]*$")) then
error("First argument to 'gamevar' must be a valid identifier", 2);
end
if (declaredNames[name]) then
error(string.format("Duplicate declaration of identifier '%s'", name), 2)
end
if (rawget(G_, name) ~= nil) then
error(string.format("Identifier name '%s' is already used in the global environment", name), 2)
end
declaredNames[name] = true
rawset(G_, name, initval or false)
end