https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107097
Bug ID: 107097
Summary: Implement floating point excess precision in C++
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jason at gcc dot gnu.org
Target Milestone: ---
Joseph Myers implemented C99 excess precision support for C in 4.5:
https://gcc.gnu.org/legacy-ml/gcc-patches/2008-11/msg00105.html
C++ has a similar rule in [expr.pre]p6:
"The values of the floating-point operands and the results of floating-point
expressions may be represented in greater precision and range than that
required by the type; the types are not changed thereby. [Footnote: The cast
and assignment operators must still perform their specific conversions.]"
Implementing this seems particularly important for users wanting to use 16-bit
floating point types in C++.
