Unicode.Property.xid_start
You're seeing just the function
xid_start
, go back to Unicode.Property module for more information.
Returns :xid_start
or nil
indicating
if the codepoint or string has the property
:xid_start
.
For string parameters, all codepoints in
the string must have the :xid_start
property in order for the result to :xid_start
.