Incorrect number reading

[josefblaha]

There is a case where Mages incorrectly tokenizes a number. Some cases were fixed in #110, but not all of them.

Steps to reproduce

Start REPL and evaluate the following numbers:

SWM> 0.8409014139716477191
0.8409014139716476
SWM> 0.84090141397164771912
0.10303165102326567

The first number correctly evaluated, losing precision as expected.
The second number (just adding 2 to the end) produces distorted result.

Environment

Mages 3.0.0
Windows 11

Cause

Since #110, the NumberTokenizer.AddValue method checks for some overflow cases, but not all of them. Specifically for the example number above it all goes well until the attempt to add the last digit 2:

The overflown newValue = 10303165102326565448 is larger than _value = 8409014139716477191, therefore it's not ignored.

Fix proposal

We should improve the overflow check. I will create a PR soon with a proposed fix.