Cmdlang_stdlib_runner.Parser_stateA mutable state that will collect parsing information.
The strategy implemented by the cmdlang runner is to create such parser state, enrich it during a parsing phases using stdlib.arg, and once this is done, return an expression suitable for evaluation.
In this part we allocate a parser state for a given parser. Once this is done, the parser must be enriched with information coming from the command line.
val create : 'a Cmdlang_ast.Ast.Arg.t -> 'a t Cmdlang_ast.Ast.or_error_msgThis part is what allows stdlib.arg to performs the expected side-effects within the state.
val spec : _ t -> (Stdlib.Arg.key * Stdlib.Arg.spec * Stdlib.Arg.doc) listval positional_state : _ t -> Positional_state.tOnce the parsing has been done, we can finalize the state and return an evaluation suitable for execution.
val finalize :
'a t ->
('a Arg_runner.t, Arg_state.Parse_error.t) Stdlib.Result.t