Peter Klausler ea7e50cdf2 [flang][runtime] Implement EX editing for input & output (#67208) ...

Support the EX edit descriptor for hexadecimal real formatted output and
hexadecimal real input for all forms of formatted input.. (We're
possibly the first Fortran compiler to support this feature for input
editing; only one other can handle EX output editing.)

As true (not BOZ) hexadecimal floating-point constants are not supported
in Fortran source code, only in formatted input, the implementation
takes place in the I/O editing portion of the runtime, not as new
conversions in the Decimal library.

2023-10-16 13:56:07 -07:00

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