42 lines
1.0 KiB
C++
42 lines
1.0 KiB
C++
#pragma once
|
|
|
|
#include <map>
|
|
#include <string>
|
|
#include <algorithm>
|
|
|
|
namespace mbgl {
|
|
namespace util {
|
|
|
|
const static std::string tokenReservedChars = "{}";
|
|
|
|
// Replaces {tokens} in a string by calling the lookup function.
|
|
template <typename Lookup>
|
|
std::string replaceTokens(const std::string &source, const Lookup &lookup) {
|
|
std::string result;
|
|
result.reserve(source.size());
|
|
|
|
auto pos = source.begin();
|
|
const auto end = source.end();
|
|
|
|
while (pos != end) {
|
|
auto brace = std::find(pos, end, '{');
|
|
result.append(pos, brace);
|
|
pos = brace;
|
|
if (pos != end) {
|
|
for (brace++; brace != end && tokenReservedChars.find(*brace) == std::string::npos; brace++);
|
|
if (brace != end && *brace == '}') {
|
|
result.append(lookup({ pos + 1, brace }));
|
|
pos = brace + 1;
|
|
} else {
|
|
result.append(pos, brace);
|
|
pos = brace;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
} // end namespace util
|
|
} // end namespace mbgl
|