SELECT DATE, AMT FROM PAYMENTS WHEN AMT > 10000
             ▲▲▲               ▲▲▲▲
             │                 │
             │                 └╴ Unknown token
             │
             └╴ Invalid column name

Tools to annotate a line of source code, in the form of callouts (lines and arrows) connected to a message.

    SELECT DATE, AMT FROM PAYMENTS WHEN AMT > 10000
                 ▲▲▲               ▲▲▲▲
                 │                 │
                 │                 └╴ Unknown token
                 │
                 └╴ Invalid column name

This kind of output is common with various kinds of parsers or interpreters.

Specs for types and functions are in the [[spec]] namespace.

Utilities to assist with REPL-oriented development.