NixOS/nix
NixOS/nix
1
0
Fork 0
mirror of https://github.com/NixOS/nix synced 2024-09-19 10:50:24 -04:00
Code Activity

builtins.match: Improve error message for bad regular expression

Browse source 
Issue #1331.
This commit is contained in:
Eelco Dolstra 2017-05-17 11:58:01 +02:00
parent b01d62285c
commit e46090edb1
No known key found for this signature in database
GPG key ID: 8170B4726D7198DE
1 changed files with 23 additions and 16 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
src/libexpr/primops.cc
View file

@ -1709,12 +1709,15 @@ static void prim_hashString(EvalState & state, const Pos & pos, Value * * args,
‘null’ or a list containing substring matches. */
static void prim_match(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
std::regex regex(state.forceStringNoCtx(*args[0], pos), std::regex::extended);
auto re = state.forceStringNoCtx(*args[0], pos);
try {
std::regex regex(re, std::regex::extended);
PathSet context;
const std::string str = state.forceString(*args[1], context, pos);
std::smatch match;
if (!std::regex_match(str, match, regex)) {
mkNull(v);
@ -1730,6 +1733,10 @@ static void prim_match(EvalState & state, const Pos & pos, Value * * args, Value
else
mkString(*(v.listElems()[i] = state.allocValue()), match[i + 1].str().c_str());
}
} catch (std::regex_error &) {
throw EvalError("invalid regular expression ‘%s’, at %s", re, pos);
}
}