std\c\fenv.d contains documentation comments for various anonymous enums. For example:
----------
/// The various floating point exceptions
enum
{
FE_INVALID = 1, ///
FE_DENORMAL = 2, ///
FE_DIVBYZERO = 4, ///
FE_OVERFLOW = 8, ///
FE_UNDERFLOW = 0x10, ///
FE_INEXACT = 0x20, ///
FE_ALL_EXCEPT = 0x3F, /// Mask of all the exceptions
}
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However, they have not been picked up by DDoc. Consequently, the std.c.fenv documentation is useless.