std: Add a parser for hexadecimal floating point numbers

Should be good enough to unblock progress on the stage2 compiler.

Unifying this parser and the regular one (and perhaps rewrite it, #2207)
is left as an exercise for the reader.
55c58f226dLemonBoy committed on 4/28/2021, 9:36:12 PM· committed by Andrew Kelleyparent86e129e
2 files changedLine totals unavailable