Restyle TLV reader: Fix floating support #8532
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1. For some reason the Get(float&) signature was declared in the .h file but never defined. Define it as well, extracting a helper function for both Get(float&) and Get(double&). 2. It is undefined behaviour to use unions for type-punning in C++. Use raw memcpy calls instead, which is well-defined (std::bit_cast is not available). Compilers will generally be able to optimize this away unless a freestanding implementation (with possibly non-standard memcpy) is used.
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A duplicate of #8531 with additional commits that automatically address
incorrect style, created by Restyled.
Please review accordingly.
Since the original Pull Request was opened as a fork in a contributor's
repository, we are unable to create a Pull Request branching from it with only
the style fixes.
The following Restylers made fixes:
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Merge this Pull Request instead of the original, or
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