The Icon programming language (from 1977) has something like this. Functions have an implicit "success" or "failure" return value in addition to regular return

The Icon programming language (from 1977) has something like this. Functions have an implicit "success" or "failure" return value in addition to regular return values. The success/failure status can be used in control flow or bubbled up the stack. https://en.wikipedia.org/wiki/Icon_%28programming_language%29#Goal-directed_execution https://en.wikipedia.org/wiki/Icon_%28programming_language%2...