On Saturday, 9 March 2019 at 18:11:09 UTC, Jacob Shtokolov wrote:
One of the task was to take a string from STDIN and detect its
type.
There were a few options: Float, Integer, string and "something
else" (which, I think, doesn't have any sense under the scope
of the task).
Another std-based solution I came up with:
bool isInteger(string str)
{
if(str.isNumeric)
{
try { return str.to!long == str.to!real; }
catch(ConvException) { return false; }
}
else return false;
}
I tried to use std.conv.to and std.conv.parse, but found that
they can't really do this. When I call `data.to!int`, the value
of "123.45" will be converted to int!
What compiler version are you using? I on the other hand was
surprised that I needed the try-catch above, after having already
checked isNumeric. The documentation claims that the conversion
to int or long would truncate, but my compiler (v2.084.0) throws
instead.
