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I used Kagi to generate a summary of the video and generate a list of key moments: The podcast discusses recent and upcoming changes to the C programming langu
by Zambyte 3y ago
I used Kagi to generate a summary of the video and generate a list of key moments:
The podcast discusses recent and upcoming changes to the C programming language in versions C23 and beyond. It explores new features being adopted from C++, such as auto type inference, attributes, and variably modified types. These changes aim to improve compatibility while staying true to C. The presentation highlights the addition of bit-precise integer types that allow specifying exact bit widths and avoid integer promotions. It also covers new Annex F functions for improved support of IEEE 754 floating point operations. Overall, the podcast examines exciting updates to C that enhance functionality, performance, and security for developers.
- C has seen significant changes over the past 12+ years for the first time, with C23 introducing many new features.
- Some of the new features in C23 are inspired by C++, such as attributes and auto type inference, but aim to stay true to C's spirit.
- Attributes allow providing additional information to the compiler without changing code behavior, and can be standard or vendor-specific.
- Auto type inference makes generic macros easier to write by inferring parameter types.
- Enumerations can now specify their underlying type, like long or unsigned int, for more control over sizes.
- Variably modified types allow array sizes to depend on non-type parameters without stack allocation issues.
- New integer types like intN_t specify exact bit widths and avoid integer promotions.
- New macros help with endianness and bit manipulation operations in a portable way.
- Annex F for floating point is now in parity with IEEE 754-2008 for more consistent floating point behavior.
- Memory clearing functions like memset_s were added to improve security by overwriting secrets before freeing memory
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