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Section: 21.3 [support.limits] Status: CD1 Submitter: Stephen Cleary Opened: 1999-12-21 Last modified: 2017-06-15
Priority: Not Prioritized
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In some places in this section, the terms "fundamental types" and "scalar types" are used when the term "arithmetic types" is intended. The current usage is incorrect because void is a fundamental type and pointers are scalar types, neither of which should have specializations of numeric_limits.
[Lillehammer: it remains true that numeric_limits is using imprecise language. However, none of the proposals for changed wording are clearer. A redesign of numeric_limits is needed, but this is more a task than an open issue.]
Change 21.3 [support.limits] to:
-1- The headers <limits>, <climits>, <cfloat>, and <cinttypes> supply characteristics of implementation-dependent
Change [limits] to:
-1- The numeric_limits component provides a C++ program with information about various properties of the implementation's representation of the
-2- Specializations shall be provided for each
fundamentaltype, both floating point and integer, including bool. The member is_specialized shall be true for all such specializations of numeric_limits.
fundamentalstandard types, such as complex<T> (26.3.2), shall not have specializations.
Change 21.3.4 [numeric.limits] to:
-1- The member is_specialized makes it possible to distinguish between fundamental types, which have specializations, and non-scalar types, which do not.