cannot catch ArgParseError about argparse.jl

[carlobaldassi]

Hi and sorry for the late reply.
In order to catch these types of errors, you need to use the exc_handler setting (documented here).

In your example, you would do something like this:

using ArgParse

function my_exc_handler(settings::ArgParseSettings, err, err_code::Int = 1)
    info("Caught something")
    rethrow(err)
end

function foo(args)
    opts = nothing
    isa(args, AbstractString) && (args=split(args))
    s = ArgParseSettings(
        exc_handler = my_exc_handler
    )
    @add_arg_table s begin
        ("--seed"; arg_type=Int; default=42)
    end
    try
        opts = parse_args(args,s)
    finally
        info("Finally this")
    end
    return opts
end

here's the result:

julia> foo("--seed 10")
INFO: Finally this
Dict{AbstractString,Any} with 1 entry:
  "seed" => 10

julia> foo("--feed 10")
INFO: Caught something
INFO: Finally this
ERROR: ArgParse.ArgParseError("unrecognized option --feed")
 in argparse_error at /home/carlo/.julia/v0.4/ArgParse/src/ArgParse.jl:1155
 in parse_long_opt at /home/carlo/.julia/v0.4/ArgParse/src/ArgParse.jl:1840
 in parse_args_unhandled at /home/carlo/.julia/v0.4/ArgParse/src/ArgParse.jl:1646
 in parse_args at /home/carlo/.julia/v0.4/ArgParse/src/ArgParse.jl:1526
 in foo at /home/carlo/tmp/ArgParse_issue_24/test.jl:18

[denizyuret]

Thanks.