A small DSL to generate syntax diagrams using this library.

Some examples

• {...} is a horizontal stack of connected elements
• [...] is a vertical sequence of connected elements
• <...> is a choice of multiple options, exactly one of which has to be picked
• "foobar" is a terminal
• 'foobar' is a non-terminal
• `foobar` is a comment
• ...? is an optional element
• ...*... is a repeated element
• ! is the empty element

Quotes (and backslashes) can be escaped using backslashes.

For example:

{["CONSTRAINT", "name"]?, <["PRIMARY", "KEY", <!, "ASC", "DESC">, 'conflict-clause', <!, "AUTOINCREMENT">], ["NOT", "NULL", 'conflict-clause'], ["UNIQUE", 'conflict-clause'], ["CHECK", "(", 'expr', ")"], ["DEFAULT", <'signed-number', 'literal-value', ["(", 'expr', ")"]>], ["COLLATE", "collation-name"], 'foreign-key-clause'>}