Macro rubbl_core::ctry [−][src]
macro_rules! ctry {
($op : expr ; $($chain_fmt_args : expr), *) => { ... };
}
Expand description
A “contextualized try” macro.
Attempts an operation that returns a Result and returns its Ok value if
the operation is successful. If not, it returns an Err value of type
failure::Context
that includes explanatory text formatted using the
format!
macro and chains to the causative error. Example:
ⓘ
ctry!(write!(myfile, "hello"); "couldn\'t write to {}", myfile_path);
Note that the operation to be attempted and the arguments to format!
are
separated by a semicolon within the ctry!()
parentheses.