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Global initialization checks name conflict

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Initialization "global a = 10" raises an error if global 'a' is already
defined, that is, it has a non-nil value.
This commit is contained in:
Roberto I 2025-11-08 11:43:42 -03:00
parent f791bb6906
commit e44f3a2ffc
13 changed files with 87 additions and 9 deletions
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21
testes/goto.lua
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@ -293,6 +293,7 @@ end
foo()
--------------------------------------------------------------------------
-- check for compilation errors
local function checkerr (code, err)
local st, msg = load(code)
assert(not st and string.find(msg, err))
@ -414,22 +415,26 @@ end
do print "testing initialization in global declarations"
global<const> a, b, c = 10, 20, 30
assert(_ENV.a == 10 and b == 20 and c == 30)
_ENV.a = nil; _ENV.b = nil; _ENV.c = nil;
global<const> a, b, c = 10
assert(_ENV.a == 10 and b == nil and c == nil)
_ENV.a = nil; _ENV.b = nil; _ENV.c = nil;
global table
global a, b, c, d = table.unpack{1, 2, 3, 6, 5}
assert(_ENV.a == 1 and b == 2 and c == 3 and d == 6)
a = nil; b = nil; c = nil; d = nil
local a, b = 100, 200
do
global a, b = a, b
end
assert(_ENV.a == 100 and _ENV.b == 200)
_ENV.a = nil; _ENV.b = nil
_ENV.a, _ENV.b, _ENV.c, _ENV.d = nil -- erase these globals
assert(_ENV.a == nil and _ENV.b == nil and _ENV.c == nil and _ENV.d == nil)
end
do
@ -454,5 +459,19 @@ do
assert(env.a == 10 and env.b == 20 and env.c == 30)
end
do -- testing global redefinitions
-- cannot use 'checkerr' as errors are not compile time
global pcall
local f = assert(load("global print = 10"))
local st, msg = pcall(f)
assert(string.find(msg, "global 'print' already defined"))
local f = assert(load("local _ENV = {AA = false}; global AA = 10"))
local st, msg = pcall(f)
assert(string.find(msg, "global 'AA' already defined"))
end
print'OK'