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Tom
419c93c840
* throw exception if a file cannot be opened * Add a new function in utils.hpp: open_file_or_throw: This function returns an opened std::ifstream or throws by calling `inja_throw`. * Use this function in Parser::load_file which previously returned an empty string if the file couldn't be opened. * Use this function in Environment::load_json which previously threw a `nlohmann::detail::parse_error` if the file couldn't be opened. * In Parser::parse_statement: When including files through `include`, do not attempt to (re-)parse templates from files that were already included. Additionally, this prevents inja from attempting to load in-memory templates by their name from disk. * Add tests that check if an exception is thrown when attempting to open files that do not exist. * cmake: enable C++11 * cmake: require C++11 when depending on single_inja * code style
50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
#ifndef PANTOR_INJA_UTILS_HPP
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#define PANTOR_INJA_UTILS_HPP
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#include <fstream>
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#include <stdexcept>
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#include "string_view.hpp"
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namespace inja {
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inline void inja_throw(const std::string& type, const std::string& message) {
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throw std::runtime_error("[inja.exception." + type + "] " + message);
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}
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inline std::ifstream open_file_or_throw(const std::string& path) {
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std::ifstream file;
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file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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try {
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file.open(path);
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} catch(const std::ios_base::failure& e) {
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inja_throw("file_error", "failed accessing file at '" + path + "'");
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}
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return file;
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}
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namespace string_view {
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inline nonstd::string_view slice(nonstd::string_view view, size_t start, size_t end) {
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start = std::min(start, view.size());
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end = std::min(std::max(start, end), view.size());
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return view.substr(start, end - start); // StringRef(Data + Start, End - Start);
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}
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inline std::pair<nonstd::string_view, nonstd::string_view> split(nonstd::string_view view, char Separator) {
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size_t idx = view.find(Separator);
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if (idx == nonstd::string_view::npos) {
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return std::make_pair(view, nonstd::string_view());
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}
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return std::make_pair(slice(view, 0, idx), slice(view, idx + 1, nonstd::string_view::npos));
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}
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inline bool starts_with(nonstd::string_view view, nonstd::string_view prefix) {
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return (view.size() >= prefix.size() && view.compare(0, prefix.size(), prefix) == 0);
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}
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} // namespace string
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} // namespace inja
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#endif // PANTOR_INJA_UTILS_HPP
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