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//@ run-pass
// Test that the Callbacks interface to the compiler works.
//@ ignore-cross-compile
//@ ignore-remote
#![feature(rustc_private)]
extern crate rustc_driver;
extern crate rustc_interface;
use rustc_interface::interface;
struct TestCalls<'a> {
count: &'a mut u32,
}
impl rustc_driver::Callbacks for TestCalls<'_> {
fn config(&mut self, _config: &mut interface::Config) {
*self.count *= 2;
}
}
fn main() {
let mut count = 1;
let args = vec!["compiler-calls".to_string(), "foo.rs".to_string()];
rustc_driver::catch_fatal_errors(|| -> interface::Result<()> {
rustc_driver::RunCompiler::new(&args, &mut TestCalls { count: &mut count }).run();
Ok(())
})
.ok();
assert_eq!(count, 2);
}
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