Fortran's interface mechanism enables generic assertion functions that work across multiple types. By creating an interface for `assert_equals` and adding type-specific implementations like `assert_reals_equal` and `assert_strings_equal`, you can write cleaner tests without type names in function calls. The article covers handling different kind-types, comparing derived types by extending interfaces locally, and managing code duplication challenges when supporting multiple numeric precisions.
Table of contents
Introducing an interface for assert_equalsMinimizing code duplicationSupporting multiple kind-typesComparing derived typesSort: