I.e. "best practice" code snippets that are known to yield efficient machine code with most modern compilers.
Is there a website with non-UB C code snippets for stuff that is UB if done directly (like converting uint to int assuming twos complement)?
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This would be a useful resource but I don't know one. Might write a basic one.
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That example isn't UB, it's implementation-defined and pretty much universally accepted as appropriate.
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But anyway, x>INT_MAX ? -1-(int)(-1-x) : x
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Ask
@johnregehr ? He might know.Thanks. Twitter will use this to make your timeline better. UndoUndo
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CERT C coding std has some examples: https://www.securecoding.cert.org/confluence/display/c/SEI+CERT+C+Coding+Standard … E.g., https://www.securecoding.cert.org/confluence/display/c/INT34-C.+Do+not+shift+an+expression+by+a+negative+number+of+bits+or+by+greater+than+or+equal+to+the+number+of+bits+that+exist+in+the+operand … (cf. noncompliant code vs. compliant solution).
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