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https://github.com/nlohmann/json.git
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adding support for escaped reference tokens
This commit is contained in:
Niels
parent
726051e9b7
commit
2cb925c186
57
src/json.hpp
57
src/json.hpp
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@ -8861,18 +8861,18 @@ basic_json_parser_64:
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/// return referenced value
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reference get(reference j)
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{
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reference result = j;
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pointer result = &j;
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for (const auto& reference_token : reference_tokens)
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{
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switch (result.m_type)
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switch (result->m_type)
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{
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case value_t::object:
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result = result[reference_token];
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result = &result->at(reference_token);
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continue;
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case value_t::array:
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result = result[std::stoi(reference_token)];
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result = &result->at(static_cast<size_t>(std::stoi(reference_token)));
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continue;
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default:
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@ -8880,13 +8880,52 @@ basic_json_parser_64:
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}
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}
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return result;
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return *result;
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}
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const_reference get(const_reference j) const
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{
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const_pointer result = &j;
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for (const auto& reference_token : reference_tokens)
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{
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switch (result->m_type)
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{
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case value_t::object:
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result = &result->at(reference_token);
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continue;
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case value_t::array:
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result = &result->at(static_cast<size_t>(std::stoi(reference_token)));
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continue;
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default:
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throw std::domain_error("unresolved reference token '" + reference_token + "'");
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}
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}
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return *result;
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}
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private:
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/// the reference tokens
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std::vector<std::string> reference_tokens {};
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/// replace all occurrences of a substring by another string
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void replace_substring(std::string& s,
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const std::string& f,
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const std::string& t)
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{
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assert(not f.empty());
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for (
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size_t pos = s.find(f); // find first occurrence of f
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pos != std::string::npos; // make sure f was found
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s.replace(pos, f.size(), t), // replace with t
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pos = s.find(f, pos + t.size()) // find next occurrence of f
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);
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}
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/// split the string input to reference tokens
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void split(std::string reference_string)
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{
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@ -8915,6 +8954,14 @@ basic_json_parser_64:
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{
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reference_tokens.push_back("");
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}
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for (auto& reference_token : reference_tokens)
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{
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// first transform any occurrence of the sequence '~1' to '/'
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replace_substring(reference_token, "~1", "/");
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// then transform any occurrence of the sequence '~0' to '~'
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replace_substring(reference_token, "~0", "~");
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}
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}
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};
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};
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@ -8140,18 +8140,18 @@ class basic_json
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/// return referenced value
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reference get(reference j)
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{
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reference result = j;
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pointer result = &j;
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for (const auto& reference_token : reference_tokens)
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{
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switch (result.m_type)
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switch (result->m_type)
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{
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case value_t::object:
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result = result[reference_token];
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result = &result->at(reference_token);
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continue;
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case value_t::array:
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result = result[std::stoi(reference_token)];
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result = &result->at(static_cast<size_t>(std::stoi(reference_token)));
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continue;
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default:
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@ -8159,13 +8159,52 @@ class basic_json
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}
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}
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return result;
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return *result;
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}
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const_reference get(const_reference j) const
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{
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const_pointer result = &j;
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for (const auto& reference_token : reference_tokens)
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{
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switch (result->m_type)
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{
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case value_t::object:
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result = &result->at(reference_token);
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continue;
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case value_t::array:
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result = &result->at(static_cast<size_t>(std::stoi(reference_token)));
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continue;
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default:
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throw std::domain_error("unresolved reference token '" + reference_token + "'");
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}
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}
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return *result;
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}
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private:
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/// the reference tokens
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std::vector<std::string> reference_tokens {};
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/// replace all occurrences of a substring by another string
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void replace_substring(std::string& s,
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const std::string& f,
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const std::string& t)
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{
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assert(not f.empty());
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for (
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size_t pos = s.find(f); // find first occurrence of f
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pos != std::string::npos; // make sure f was found
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s.replace(pos, f.size(), t), // replace with t
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pos = s.find(f, pos + t.size()) // find next occurrence of f
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);
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}
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/// split the string input to reference tokens
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void split(std::string reference_string)
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{
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@ -8194,6 +8233,14 @@ class basic_json
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{
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reference_tokens.push_back("");
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}
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for (auto& reference_token : reference_tokens)
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{
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// first transform any occurrence of the sequence '~1' to '/'
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replace_substring(reference_token, "~1", "/");
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// then transform any occurrence of the sequence '~0' to '~'
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replace_substring(reference_token, "~0", "~");
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}
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}
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};
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};
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@ -12071,13 +12071,53 @@ TEST_CASE("JSON pointers")
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}
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)"_json;
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json::json_pointer jp0("");
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json::json_pointer jp1("/foo");
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//json::json_pointer jp2("/foo/0");
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const json j_const = j;
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auto jp0_ = jp0.get(j);
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auto jp1_ = jp1.get(j);
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//auto jp2_ = jp2.get(j);
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SECTION("nonconst access")
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{
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// the whole document
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CHECK(json::json_pointer().get(j) == j);
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CHECK(json::json_pointer("").get(j) == j);
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// array access
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CHECK(json::json_pointer("/foo").get(j) == j["foo"]);
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CHECK(json::json_pointer("/foo/0").get(j) == j["foo"][0]);
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CHECK(json::json_pointer("/foo/1").get(j) == j["foo"][1]);
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// empty string access
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CHECK(json::json_pointer("/").get(j) == j[""]);
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// other cases
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CHECK(json::json_pointer("/ ").get(j) == j[" "]);
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CHECK(json::json_pointer("/c%d").get(j) == j["c%d"]);
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CHECK(json::json_pointer("/e^f").get(j) == j["e^f"]);
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CHECK(json::json_pointer("/g|h").get(j) == j["g|h"]);
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CHECK(json::json_pointer("/i\\j").get(j) == j["i\\j"]);
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CHECK(json::json_pointer("/k\"l").get(j) == j["k\"l"]);
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// escaped access
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CHECK(json::json_pointer("/a~1b").get(j) == j["a/b"]);
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CHECK(json::json_pointer("/m~0n").get(j) == j["m~n"]);
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// unescaped access
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CHECK_THROWS_AS(json::json_pointer("/a/b").get(j), std::out_of_range);
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CHECK_THROWS_WITH(json::json_pointer("/a/b").get(j), "key 'a' not found");
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// "/a/b" works for JSON {"a": {"b": 42}}
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CHECK(json::json_pointer("/a/b").get({{"a", {{"b", 42}}}}) == json(42));
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}
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SECTION("const access")
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{
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CHECK(j_const == json::json_pointer().get(j_const));
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CHECK(j_const == json::json_pointer("").get(j_const));
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CHECK(j_const["foo"] == json::json_pointer("/foo").get(j_const));
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CHECK(j_const["foo"][0] == json::json_pointer("/foo/0").get(j_const));
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CHECK(j_const["foo"][1] == json::json_pointer("/foo/1").get(j_const));
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CHECK(j_const[""] == json::json_pointer("/").get(j_const));
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CHECK(j_const[" "] == json::json_pointer("/ ").get(j_const));
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}
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}
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}
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@ -12437,4 +12477,3 @@ TEST_CASE("regression tests")
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CHECK(j3c.dump() == "1e04");
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}
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}
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