W8026 Functions with exception specifications are not expanded inline (C++)
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Also:'Functions taking class by value arguments are not expanded inline
(Command-line option to suppress warning: -w-inl)
Exception specifications are not expanded inline: Check your inline code for lines containing exception specification.
Functions taking class-by-value argument(s) are not expanded inline: When exception handling is enabled, functions that take class arguments by value cannot be expanded inline.
Note:Functions taking class parameters by reference are not subject to this restriction.