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https://github.com/nlohmann/json.git
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616caea27a
* Make exception context optional Change exception context parameter to pointer and replace context with nullptr where appropriate. * Support escaping other string types * Add string concatenation function Add variadic concat() function for concatenating char *, char, and string types. * Replace string concatenations using + with concat() * Template json_pointer on string type Change json_pointer from being templated on basic_json to being templated on string type. * Add unit test for #3388 Closes #3388. * Fix regression test for #2958 * Add backwards compatibility with json_pointer<basic_json> * Update json_pointer docs * Allow comparing different json_pointers * Update version numbers
66 lines
1.8 KiB
C++
66 lines
1.8 KiB
C++
#pragma once
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#include <nlohmann/detail/macro_scope.hpp>
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namespace nlohmann
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{
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namespace detail
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{
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/*!
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@brief replace all occurrences of a substring by another string
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@param[in,out] s the string to manipulate; changed so that all
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occurrences of @a f are replaced with @a t
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@param[in] f the substring to replace with @a t
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@param[in] t the string to replace @a f
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@pre The search string @a f must not be empty. **This precondition is
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enforced with an assertion.**
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@since version 2.0.0
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*/
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template<typename StringType>
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inline void replace_substring(StringType& s, const StringType& f,
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const StringType& t)
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{
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JSON_ASSERT(!f.empty());
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for (auto pos = s.find(f); // find first occurrence of f
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pos != StringType::npos; // make sure f was found
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s.replace(pos, f.size(), t), // replace with t, and
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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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/*!
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* @brief string escaping as described in RFC 6901 (Sect. 4)
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* @param[in] s string to escape
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* @return escaped string
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*
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* Note the order of escaping "~" to "~0" and "/" to "~1" is important.
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*/
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template<typename StringType>
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inline StringType escape(StringType s)
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{
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replace_substring(s, StringType{"~"}, StringType{"~0"});
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replace_substring(s, StringType{"/"}, StringType{"~1"});
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return s;
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}
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/*!
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* @brief string unescaping as described in RFC 6901 (Sect. 4)
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* @param[in] s string to unescape
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* @return unescaped string
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*
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* Note the order of escaping "~1" to "/" and "~0" to "~" is important.
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*/
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template<typename StringType>
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static void unescape(StringType& s)
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{
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replace_substring(s, StringType{"~1"}, StringType{"/"});
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replace_substring(s, StringType{"~0"}, StringType{"~"});
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}
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} // namespace detail
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} // namespace nlohmann
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