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optional: use #if instead of #ifndef, fixes #3859 #4526

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optional: use #if instead of #ifndef, fixes #3859 #4526

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ff7ed18
optional: use #if instead of #ifndef, fixes #3859
Dec 2, 2024
a73a715
wip debug appveyor
Dec 12, 2024
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2 changes: 1 addition & 1 deletion .github/external_ci/appveyor.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ environment:
- APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
configuration: Release
platform: x86
CXX_FLAGS: "/W4 /WX"
CXX_FLAGS: "/permissive- /std:c++latest /utf-8 /W4 /WX"
CMAKE_OPTIONS: "-DJSON_ImplicitConversions=OFF"
GENERATOR: Visual Studio 16 2019

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2 changes: 1 addition & 1 deletion include/nlohmann/detail/conversions/from_json.hpp
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Expand Up @@ -48,7 +48,7 @@ inline void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
}

#ifdef JSON_HAS_CPP_17
#ifndef JSON_USE_IMPLICIT_CONVERSIONS
#if !JSON_USE_IMPLICIT_CONVERSIONS
template<typename BasicJsonType, typename T>
void from_json(const BasicJsonType& j, std::optional<T>& opt)
{
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2 changes: 1 addition & 1 deletion single_include/nlohmann/json.hpp
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Expand Up @@ -4721,7 +4721,7 @@ inline void from_json(const BasicJsonType& j, typename std::nullptr_t& n)
}

#ifdef JSON_HAS_CPP_17
#ifndef JSON_USE_IMPLICIT_CONVERSIONS
#if !JSON_USE_IMPLICIT_CONVERSIONS
template<typename BasicJsonType, typename T>
void from_json(const BasicJsonType& j, std::optional<T>& opt)
{
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2 changes: 1 addition & 1 deletion tests/src/unit-conversions.cpp
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Expand Up @@ -1598,7 +1598,7 @@ TEST_CASE("JSON to enum mapping")


#ifdef JSON_HAS_CPP_17
#ifndef JSON_USE_IMPLICIT_CONVERSIONS
#if !JSON_USE_IMPLICIT_CONVERSIONS
TEST_CASE("std::optional")
{
SECTION("null")
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