assertInt method
Returns value as an int, if it's an integer value according to isInt.
Throws a SassScriptException
if value isn't an integer. If this came
from a function argument, name
is the argument name (without the $
).
It's used for error reporting.
Implementation
int assertInt([String? name]) {
if (fuzzyAsInt(value) case var integer?) return integer;
throw SassScriptException("$this is not an int.", name);
}