Rust 0.9 indicates that support for expansion of macros into multiple
statements is now supported, and the following example from the test suite
works for me.
https://github.com/mozilla/rust/blob/master/src/test/run-pass/macro-multiple-items.rs
However, I receive an error for the following code
#[feature(macro_rules)];
macro_rules! my_print(
($a:expr, $b:expr) => (
println!("{:?}", a);
println!("{:?}", b);
);
)
fn main() {
let a = 1;
let b = 2;
my_print!(a, b);
}
(Note that the ^~~~~~~ below points at println.)
$ rustc macro_ignores_second_line.rs
macro_ignores_second_line.rs:6:9: 6:16 error: macro expansion ignores token
`println` and any following
macro_ignores_second_line.rs:6 println!("{:?}", b);
^~~~~~~
error: aborting due to previous error
task 'rustc' failed at 'explicit failure',
/home/marcianx/devel/rust/checkout/rust/src/libsyntax/diagnostic.rs:75
task '<main>' failed at 'explicit failure',
/home/marcianx/devel/rust/checkout/rust/src/librustc/lib.rs:453
What's the right way to do this?
Ashish
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