error: expressions must be enclosed in braces to be used as const generic arguments
  --> $DIR/macro_rules-braces.rs:34:17
   |
LL |     let _: baz!(N);
   |                 ^
   |
help: enclose the `const` expression in braces
   |
LL |     let _: baz!({ N });
   |                 ^   ^

error: expressions must be enclosed in braces to be used as const generic arguments
  --> $DIR/macro_rules-braces.rs:54:17
   |
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:31:20
   |
LL |     let _: foo!({{ N }});
   |                    ^ cannot perform const operation using `N`
   |
   = help: const parameters may only be used as standalone arguments, i.e. `N`

error: generic parameters may not be used in const operations
  --> $DIR/macro_rules-braces.rs:33:19
   |
LL |     let _: bar!({ N });
   |                   ^ cannot perform const operation using `N`
   |
   = help: const parameters may only be used as standalone arguments, i.e. `N`

error: generic parameters may not be used in const operations
  --> $DIR/macro_rules-braces.rs:36:20
   |
LL |     let _: baz!({{ N }});
   |                    ^ cannot perform const operation using `N`
   |
   = help: const parameters may only be used as standalone arguments, i.e. `N`

error: generic parameters may not be used in const operations
  --> $DIR/macro_rules-braces.rs:38:19
   |
LL |     let _: biz!({ N });
   |                   ^ cannot perform const operation using `N`
   |
   = help: const parameters may only be used as standalone arguments, i.e. `N`

error: aborting due to 6 previous errors