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Fix build on GCC 4.9

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GCC 4.9 doesn't like reassigning a std::stringstream.

http://hydra.nixos.org/build/40371644
This commit is contained in:
Eelco Dolstra 2016-09-12 13:22:23 +02:00
parent 5039d3b9de
commit e5949b5ce8
1 changed files with 8 additions and 11 deletions
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19
src/nix-build/nix-build.cc
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@ -24,7 +24,7 @@ std::vector<string> shellwords(const string & s)
std::regex whitespace("^(\\s+).*");
auto begin = s.cbegin();
std::vector<string> res;
std::stringstream cur;
std::string cur;
enum state {
sBegin,
sQuote
@ -35,31 +35,28 @@ std::vector<string> shellwords(const string & s)
if (st == sBegin) {
std::smatch match;
if (regex_search(it, s.cend(), match, whitespace)) {
cur << string(begin, it);
res.push_back(cur.str());
cur = stringstream{};
cur.append(begin, it);
res.push_back(cur);
cur.clear();
it = match[1].second;
begin = it;
}
}
switch (*it) {
case '"':
cur << string(begin, it);
cur.append(begin, it);
begin = it + 1;
st = st == sBegin ? sQuote : sBegin;
break;
case '\\':
/* perl shellwords mostly just treats the next char as part of the string with no special processing */
cur << string(begin, it);
cur.append(begin, it);
begin = ++it;
break;
}
}
cur << string(begin, it);
auto last = cur.str();
if (!last.empty()) {
res.push_back(std::move(last));
}
cur.append(begin, it);
if (!cur.empty()) res.push_back(cur);
return res;
}