Runs of whitespace are treated as a single separator and empty fields are
discarded, so a string that is empty or entirely whitespace yields a zero
sized result. Whitespace is the set defined by pic_ascii, that is space,
horizontal tab, vertical tab, carriage return, line feed and form feed.
Nodes of different colours represent the following:
Solid arrows point from a procedure to one which it calls. Dashed
arrows point from an interface to procedures which implement that interface.
This could include the module procedures in a generic interface or the
implementation in a submodule of an interface in a parent module.
Where possible, edges connecting nodes are
given different colours to make them easier to distinguish in
large graphs.
Module Procedures
private pure function tokenize_char(string) result(tokens)
Split a character string into whitespace separated words.