getBaseRegExp function
Returns a regular expression that could match a certain String expressed
with a certain base.
Implementation
RegExp getBaseRegExp(int base) {
assert([2, 8, 10, 16].contains(base), 'Base not supported');
switch (base) {
case 2:
return _binaryRegExp;
case 8:
return _octalRegExp;
case 16:
return _hexadecimalRegExp;
case 10:
default:
return _decimalRegExp;
}
}