Fix compilation issue on elder compilers: replace constexpr EPSILON by template function.

[Mr-Question]

No description provided.

[codecov-io]

Codecov Report

Merging #2 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master       #2      +/-   ##
==========================================
+ Coverage   99.32%   99.32%   +<.01%     
==========================================
  Files           9        9              
  Lines         742      744       +2     
==========================================
+ Hits          737      739       +2     
  Misses          5        5

Impacted Files	Coverage Δ
include/MyGAL/util.h	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cfe5afc...e6af28c. Read the comment docs.

[pvigier]

Hi,

Which C++ norm are you targeting ? constexpr variables should be OK in C++11, I guess.

I should have mentioned that somewhere in the README but MyGAL currently targets C++14 and beyond.

Best,
Pierre

[Mr-Question]

I am ashamed to admit, but there still be a chance to use Visual Studio 2008 in some cases.
As for current issue, the target is C++03.