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Syntax should not allow numbers touching identifiers 

Code like 'a = 1print()' should not be accepted.
This commit is contained in:
Roberto Ierusalimschy 2019-04-09 18:40:39 -03:00
parent 8004798b03
commit 65d1aa7a77
2 changed files with 11 additions and 0 deletions
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2
llex.c
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@ -228,6 +228,8 @@ static int read_numeral (LexState *ls, SemInfo *seminfo) {
save_and_next(ls); save_and_next(ls);
else break; else break;
} }
if (lislalnum(ls->current)) /* is numeral touching an alpha num? */
save_and_next(ls); /* force an error */
save(ls, '\0'); save(ls, '\0');
if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */ if (luaO_str2num(luaZ_buffer(ls->buff), &obj) == 0) /* format error? */
lexerror(ls, "malformed number", TK_FLT); lexerror(ls, "malformed number", TK_FLT);

9
testes/literals.lua
View File

@ -306,4 +306,13 @@ assert(not load"a = 'non-ending string\n'")
assert(not load"a = '\\345'") assert(not load"a = '\\345'")
assert(not load"a = [=x]") assert(not load"a = [=x]")
local function malformednum (n, exp)
local s, msg = load("return " .. n)
assert(not s and string.find(msg, exp))
end
malformednum("0xe-", "near <eof>")
malformednum("0xep-p", "malformed number")
malformednum("1print()", "malformed number")
print('OK') print('OK')