no need to do run-time formatting

RalfJung · RalfJung · commit 0f4332117866 · 2017-08-03T12:39:55.000-07:00
diff --git a/tests/compiletest.rs b/tests/compiletest.rs
@@ -1,4 +1,4 @@
-#![feature(slice_concat_ext)]
+#![feature(slice_concat_ext, const_fn)]
 
 extern crate compiletest_rs as compiletest;
 
@@ -13,8 +13,8 @@ macro_rules! eprintln {
     }
 }
 
-fn miri_path() -> String {
-    format!("target/{}/miri", env!("PROFILE"))
+const fn miri_path() -> &'static str {
+    concat!("target/", env!("PROFILE"), "/miri")
 }
 
 fn compile_fail(sysroot: &Path, path: &str, target: &str, host: &str, fullmir: bool) {

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-#![feature(slice_concat_ext)]`
	`1`	`+#![feature(slice_concat_ext, const_fn)]`
`2`	`2`
`3`	`3`	`extern crate compiletest_rs as compiletest;`
`4`	`4`
`@@ -13,8 +13,8 @@ macro_rules! eprintln {`
`13`	`13`	`}`
`14`	`14`	`}`
`15`	`15`
`16`		`-fn miri_path() -> String {`
`17`		`- format!("target/{}/miri", env!("PROFILE"))`
	`16`	`+const fn miri_path() -> &'static str {`
	`17`	`+ concat!("target/", env!("PROFILE"), "/miri")`
`18`	`18`	`}`
`19`	`19`
`20`	`20`	`fn compile_fail(sysroot: &Path, path: &str, target: &str, host: &str, fullmir: bool) {`