On Wed, Jun 1, 2016 at 11:55 PM, Xiaodi Wu <[email protected]> wrote:
> On Wed, Jun 1, 2016 at 11:28 PM, Erica Sadun via swift-evolution < > [email protected]> wrote: > >> Upon accepting SE-0098, the core team renamed the proposed stdlib >> function from dynamicType() to type(of:). They write, "The core team >> recognizes that this means that we should probably resyntax the existing >> sizeof/strideof functions, but that should be a follow-on discussion." >> >> Follow on discussion started. Have at it. >> > > See: http://thread.gmane.org/gmane.comp.lang.swift.evolution/15830 > > To summarize the previous discussion: 1. Per Joe Groff, although sizeof() and friends are treated as terms-of-art, these names were lifted straight from C and do not correspond to anything named "sizeof" in LLVM. 2. There are issues with using a name such as stride(of:), because stride(...) already means something else in the stdlib; moreover, size(of:) isn't the best name for something that doesn't do what its C namesake does; therefore, larger changes to the naming were suggested. 2. Dave A. and others expressed the opinion that these should probably not be global functions; his preference was for: ``` MemoryLayout<T>.size // currently sizeof() MemoryLayout<T>.spacing // currently strideof() MemoryLayout<T>.alignment // currently alignof() ``` 3. Dave A. proposed that sizeofValue(), strideofValue(), and alignofValue() are better off removed altogether. I don't know if people are going to be happy about this idea. * * * If we take inspiration from type(of:), then it's actually sizeofValue(), etc., that should be renamed size(of:), etc. Also, a fun tidbit is that what's currently called sizeof(), etc.--the ones that take types rather than values--are actually not very good candidates for having parameter labels, because it's OK to write `sizeof(Int)`, but one must currently write `size(of: Int.self)` when the function has a label.
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