Valid uint64 literal says -72057594037927936 can't be converted to uint64.

[treeform]

echo 0xFF000000_00000000.uint64

Error: -72057594037927936 can't be converted to uint64

https://play.nim-lang.org/#ix=2nY6

I think its treating all hex literals as signed int64, so it can't accept one that has a negative bit set. Some where in some conversions this happens?

My compiler:

Nim Compiler Version 1.2.0 [Windows: amd64]
Compiled at 2020-04-03
Copyright (c) 2006-2020 by Andreas Rumpf

git hash: 7e83adff84be5d0c401a213eccb61e321a3fb1ff
active boot switches: -d:release

[treeform]

Hmm Recruit_main707, pointed out that cast works

echo cast[uint64](0xFF00000000000000)

Very strange!

[treeform]

Hmm leorize, points out that:

echo 0xFF00000000000000u64

Also works!

[timotheecour]

update as of 3ceaf5c

when true:
  # echo 0xFF000000_00000000.uint64 # Error: -72057594037927936 can't be converted to uint64
  echo 0xFF000000_00000000'u64 # ok
  const a = 0xFF000000_00000000
  # echo a.uint64 # Error: -72057594037927936 can't be converted to uint64
  # var b: uint64 = a # Error: type mismatch:

[ringabout]

Duplicate of #12700

let x = 0xFF000000_00000000
echo uint64(x)

works

[treeform]

Thank you! Great fix.