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https://github.com/nlohmann/json.git
synced 2026-09-29 06:14:53 +01:00
Niels Lohmann
87a33734c4
Leaving the character that terminates a number in the stream is observable: reading "1,2,3" with repeated operator>> works today only because the comma after each number is swallowed, and std::getline after a number skips the line break. Both break with the fix, so make it opt-in for 3.x, as suggested by @gregmarr in the review. - JSON_PRECISE_STREAM_POSITION (default 0) selects the peek-based input_stream_adapter. Without it, the adapter is the consuming one from develop and has no supports_lookahead, so lexer::release_lookahead() and the parser's calls to it compile to nothing. - The macro changes input_stream_adapter's layout and member functions, so it gets the ABI tag _psp, after _bics. The ABI config tests, the natvis generator, and nlohmann_json.natvis (regenerated) know the tag. - The tests for the fix move to unit-precise-stream-position.cpp, which defines the macro itself and runs in every build, and gain the two cases above. unit-deserialization.cpp pins the default behavior instead. - The docs describe the default behavior again and point to the new macro page; version history says "added in 3.13.0, planned default in 4.0.0". Signed-off-by: Niels Lohmann <mail@nlohmann.me>
54 lines
1.4 KiB
C++
54 lines
1.4 KiB
C++
// __ _____ _____ _____
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// __| | __| | | | JSON for Modern C++ (supporting code)
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// | | |__ | | | | | | version 3.12.0
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// |_____|_____|_____|_|___| https://github.com/nlohmann/json
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//
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// SPDX-FileCopyrightText: 2013-2026 Niels Lohmann <https://nlohmann.me>
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// SPDX-License-Identifier: MIT
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#include "doctest_compatibility.h"
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#include "config.hpp"
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#include <nlohmann/json_fwd.hpp>
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TEST_CASE("default namespace")
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{
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// GCC 4.8 fails with regex_error
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#if !DOCTEST_GCC || DOCTEST_GCC >= DOCTEST_COMPILER(4, 9, 0)
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SECTION("namespace matches expectation")
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{
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std::string expected = "nlohmann::json_abi";
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#if JSON_DIAGNOSTICS
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expected += "_diag";
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#endif
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#if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
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expected += "_ldvcmp";
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#endif
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#if JSON_DIAGNOSTIC_POSITIONS
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expected += "_dp";
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#endif
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#if JSON_BRACE_INIT_COPY_SEMANTICS
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expected += "_bics";
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#endif
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#if JSON_PRECISE_STREAM_POSITION
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expected += "_psp";
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#endif
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expected += "_v" STRINGIZE(NLOHMANN_JSON_VERSION_MAJOR);
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expected += "_" STRINGIZE(NLOHMANN_JSON_VERSION_MINOR);
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expected += "_" STRINGIZE(NLOHMANN_JSON_VERSION_PATCH) "::basic_json";
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// fallback for Clang
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const std::string ns{STRINGIZE(NLOHMANN_JSON_NAMESPACE) "::basic_json"};
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CHECK(namespace_name<nlohmann::json>(ns) == expected);
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}
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#endif
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}
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