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<title id="nj-int-lanes-title">Two lanes: the 3.x release train, whose minor and patch releases do not break code that uses the public A&#8203;PI, followed by version 4.0, which has no release date yet. Each breaking change is a macro that is available in 3.x today with its 3.x default and becomes the default in 4.0: JSON_USE_IMPLICIT_CONVERSIONS, added in 3.9.0, 3.x default 1, 4.0 value 0; JSON_USE_GLOBAL_UDLS, added in 3.11.0, 3.x default 1, 4.0 value 0; JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON, added in 3.11.0, 3.x default 0, 4.0 value 0, macro removed; JSON_BRACE_INIT_COPY_SEMANTICS, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_PRECISE_STREAM_POSITION, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_STRICT_NUL_HANDLING, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_STRICT_BINARY_UTF8, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_DISABLE_TUPLE_REFERENCE_CONVERSION, added in 3.13.0, 3.x default 0, 4.0 value 1; JSON_DELETE_DEPRECATED_FUNCTIONS, added in 3.13.0, 3.x default 0, 4.0 value 1, macro removed.</title>
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<text class="nj-int-lanetext" x="32" y="41">3.x release train</text>
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<text class="nj-int-text" x="16" y="98">A minor or patch release of 3.x does not break code that uses the public A&#8203;PI, unless that code opts in with a macro.</text>
<text class="nj-int-text" x="16" y="118">4.0 is not developed on a separate branch: it switches the defaults of these macros and removes the macros.</text>
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<text class="nj-int-macro" x="32" y="223.5">JSON_USE_GLOBAL_UDLS</text>
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<text class="nj-int-val nj-int-val--v4" x="764" y="461.5" text-anchor="middle">removed</text>
<text class="nj-int-mute" x="16" y="496">Versions on the 3.x lane are the ones that added a macro, not to scale. &#8220;removed&#8221;: see the 4.0 behavior column of the table.</text>
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