Add std::source_location to ChipError for C++20 builds

Author: mwswartwout

src/lib/core/CHIPError.h

@@ -35,6 +35,10 @@
 #include <limits>
 #include <type_traits>
 
+#if __cplusplus >= 202002L
+#include <source_location>
+#endif  // __cplusplus >= 202002L
+
 namespace chip {
 
 /**
@@ -112,7 +116,11 @@ class ChipError
 
     // Helper for declaring constructors without too much repetition.
 #if CHIP_CONFIG_ERROR_SOURCE
+#if __cplusplus >= 202002L
+#define CHIP_INITIALIZE_ERROR_SOURCE(f, l, loc) , mFile((f)), mLine((l)), mSourceLocation((loc))
+#else
 #define CHIP_INITIALIZE_ERROR_SOURCE(f, l) , mFile((f)), mLine((l))
+#endif  // __cplusplus >= 202002L
 #else // CHIP_CONFIG_ERROR_SOURCE
 #define CHIP_INITIALIZE_ERROR_SOURCE(f, l)
 #endif // CHIP_CONFIG_ERROR_SOURCE
@@ -123,23 +131,39 @@ class ChipError
      * @note
      *  The result is valid only if CanEncapsulate() is true.
      */
+#if __cplusplus >= 202002L
+    constexpr ChipError(Range range, ValueType value) :
+        mError(MakeInteger(range, (value & MakeMask(0, kValueLength)))) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0, std::source_location())
+    {}
+    constexpr ChipError(Range range, ValueType value, const char * file, unsigned int line, std::source_location location = std::source_location::current()) :
+        mError(MakeInteger(range, (value & MakeMask(0, kValueLength)))) CHIP_INITIALIZE_ERROR_SOURCE(file, line, location)
+    {}
+#else
     constexpr ChipError(Range range, ValueType value) :
         mError(MakeInteger(range, (value & MakeMask(0, kValueLength)))) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0)
     {}
     constexpr ChipError(Range range, ValueType value, const char * file, unsigned int line) :
         mError(MakeInteger(range, (value & MakeMask(0, kValueLength)))) CHIP_INITIALIZE_ERROR_SOURCE(file, line)
     {}
+#endif // __cplusplus >= 202002L
 
     /**
      * Construct a CHIP_ERROR for SdkPart @a part with @a code.
      *
      * @note
      *  The macro version CHIP_SDK_ERROR checks that the numeric value is constant and well-formed.
      */
+#if __cplusplus >= 202002L
+    constexpr ChipError(SdkPart part, uint8_t code) : mError(MakeInteger(part, code)) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0, std::source_location()) {}
+    constexpr ChipError(SdkPart part, uint8_t code, const char * file, unsigned int line, std::source_location location = std::source_location::current()) :
+        mError(MakeInteger(part, code)) CHIP_INITIALIZE_ERROR_SOURCE(file, line, location)
+    {}
+#else
     constexpr ChipError(SdkPart part, uint8_t code) : mError(MakeInteger(part, code)) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0) {}
     constexpr ChipError(SdkPart part, uint8_t code, const char * file, unsigned int line) :
         mError(MakeInteger(part, code)) CHIP_INITIALIZE_ERROR_SOURCE(file, line)
     {}
+#endif // __cplusplus >= 202002L
 
     /**
      * Construct a CHIP_ERROR constant for SdkPart @a part with @a code at the current source line.
@@ -159,10 +183,17 @@ class ChipError
      * @note
      *  This is intended to be used only in foreign function interfaces.
      */
+#if __cplusplus >= 202002L
+    explicit constexpr ChipError(StorageType error) : mError(error) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0, std::source_location()) {}
+    explicit constexpr ChipError(StorageType error, const char * file, unsigned int line, std::source_location location = std::source_location::current()) :
+        mError(error) CHIP_INITIALIZE_ERROR_SOURCE(file, line, location)
+    {}
+#else
     explicit constexpr ChipError(StorageType error) : mError(error) CHIP_INITIALIZE_ERROR_SOURCE(nullptr, 0) {}
     explicit constexpr ChipError(StorageType error, const char * file, unsigned int line) :
         mError(error) CHIP_INITIALIZE_ERROR_SOURCE(file, line)
     {}
+#endif // __cplusplus >= 202002L
 
 #undef CHIP_INITIALIZE_ERROR_SOURCE
 
@@ -365,6 +396,9 @@ class ChipError
 #if CHIP_CONFIG_ERROR_SOURCE
     const char * mFile;
     unsigned int mLine;
+#if __cplusplus >= 202002L
+    std::source_location mSourceLocation;
+#endif  // __cplusplus >= 202002L
 #endif // CHIP_CONFIG_ERROR_SOURCE
 
 public: