try_ catch_ Statement

| Home | Libraries | People | FAQ | More

#### try_ catch_ Statement

    #include <boost/phoenix/statement/try_catch.hpp>

The syntax is:

    try_
    [
        sequenced_statements
    ]
    .catch_<exception_type>()
    [
        sequenced_statements
    ]
    .catch_<another_exception_type>(local-id)
    [
        sequenced_statements
    ]
    ...
    .catch_all
    [
        sequenced_statement
    ]

Note the usual underscore after try and catch, and the extra parentheses required after the catch.

The second form of catch statement can refer thrown exception using specified local-id, which is Local Variables, in sequenced_statements.

Example: The following code calls the (lazy) function `f` for each element, and prints messages about different exception types it catches.

    try_
    [
        f(arg1)
    ]
    .catch_<runtime_error>()
    [
        cout << val("caught runtime error or derived\n")
    ]
    .catch_<exception>(e_)
    [
        cout << val("caught exception or derived: ") << bind(&exception::what, e_) << val("\n")
    ]
    .catch_all
    [
        cout << val("caught some other type of exception\n")
    ]