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Re: C++ PATCH: Disallow floating-point literals in integral-constantexpressions

Ranjit Mathew wrote:

static const jfloat DEFAULT_LOAD_FACTOR = 0x1.800000p-1f;

Ugh. That's invalid C++. 


Then that should have been a different error, no? :-)
(But I'm curious - and an ignoramus - why is that invalid?)

See this morning's discussion on the GCC mailing list.

The code generate by gjavah is invalid on two counts: (1) you can't have an in-class initialization a static data member of non-integral type, and (2) even for a static data member with integral type, the initializer has to be an integral constant expression, which a floating-point literal is not.

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Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com
(916) 791-8304

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