error: expressions must be enclosed in braces to be used as const generic arguments --> $DIR/macro_rules-braces.rs:44:17 | LL | let _: baz!(m::P); | ^^^^ | help: enclose the `const` expression in braces | LL | let _: baz!({ m::P }); | + + error: expressions must be enclosed in braces to be used as const generic arguments --> $DIR/macro_rules-braces.rs:64:17 | LL | let _: baz!(10 + 7); | ^^^^^^ | help: enclose the `const` expression in braces | LL | let _: baz!({ 10 + 7 }); | + + error: generic parameters may not be used in const operations --> $DIR/macro_rules-braces.rs:32:20 | LL | let _: foo!({{ N }}); | ^ cannot perform const operation using `N` | = help: const parameters may only be used as standalone arguments, i.e. `N` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: generic parameters may not be used in const operations --> $DIR/macro_rules-braces.rs:36:19 | LL | let _: bar!({ N }); | ^ cannot perform const operation using `N` | = help: const parameters may only be used as standalone arguments, i.e. `N` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: generic parameters may not be used in const operations --> $DIR/macro_rules-braces.rs:41:20 | LL | let _: baz!({{ N }}); | ^ cannot perform const operation using `N` | = help: const parameters may only be used as standalone arguments, i.e. `N` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: generic parameters may not be used in const operations --> $DIR/macro_rules-braces.rs:46:19 | LL | let _: biz!({ N }); | ^ cannot perform const operation using `N` | = help: const parameters may only be used as standalone arguments, i.e. `N` = help: add `#![feature(generic_const_exprs)]` to allow generic const expressions error: aborting due to 6 previous errors