error: unexpected token: $
  --> $DIR/syntax-errors.rs:9:8
   |
LL |     ( $$ $a:ident ) => {
   |        ^

note: `$$` and meta-variable expressions are not allowed inside macro parameter definitions
  --> $DIR/syntax-errors.rs:9:8
   |
LL |     ( $$ $a:ident ) => {
   |        ^

error: unexpected token: {
  --> $DIR/syntax-errors.rs:15:8
   |
LL |     ( ${ len() } ) => {
   |        ^^^^^^^^^

note: `$$` and meta-variable expressions are not allowed inside macro parameter definitions
  --> $DIR/syntax-errors.rs:15:8
   |
LL |     ( ${ len() } ) => {
   |        ^^^^^^^^^

error: expected one of: `*`, `+`, or `?`
  --> $DIR/syntax-errors.rs:15:8
   |
LL |     ( ${ len() } ) => {
   |        ^^^^^^^^^

error: meta-variables within meta-variable expressions must be referenced using a dollar sign
  --> $DIR/syntax-errors.rs:22:33
   |
LL |     ( $( $i:ident ),* ) => { ${ ignore() } };
   |                                 ^^^^^^

error: only unsuffixes integer literals are supported in meta-variable expressions
  --> $DIR/syntax-errors.rs:27:33
   |
LL |     ( $( $i:ident ),* ) => { ${ index(1u32) } };
   |                                 ^^^^^

error: meta-variable expression parameter must be wrapped in parentheses
  --> $DIR/syntax-errors.rs:32:33
   |
LL |     ( $( $i:ident ),* ) => { ${ count } };
   |                                 ^^^^^

error: meta-variable expression parameter must be wrapped in parentheses
  --> $DIR/syntax-errors.rs:49:33
   |
LL |     ( $( $i:ident ),* ) => { ${ count{i} } };
   |                                 ^^^^^

error: expected identifier, found `123`
  --> $DIR/syntax-errors.rs:54:23
   |
LL |     () => { ${ignore($123)} }
   |                       ^^^ help: try removing `123`

error: unexpected token: a
  --> $DIR/syntax-errors.rs:66:19
   |
LL |         ${count() a b c}
   |                   ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:66:19
   |
LL |         ${count() a b c}
   |                   ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:68:20
   |
LL |         ${count($i a b c)}
   |                    ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:68:20
   |
LL |         ${count($i a b c)}
   |                    ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:70:23
   |
LL |         ${count($i, 1 a b c)}
   |                       ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:70:23
   |
LL |         ${count($i, 1 a b c)}
   |                       ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:72:21
   |
LL |         ${count($i) a b c}
   |                     ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:72:21
   |
LL |         ${count($i) a b c}
   |                     ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:75:22
   |
LL |         ${ignore($i) a b c}
   |                      ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:75:22
   |
LL |         ${ignore($i) a b c}
   |                      ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:77:21
   |
LL |         ${ignore($i a b c)}
   |                     ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:77:21
   |
LL |         ${ignore($i a b c)}
   |                     ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:80:19
   |
LL |         ${index() a b c}
   |                   ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:80:19
   |
LL |         ${index() a b c}
   |                   ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:82:19
   |
LL |         ${index(1 a b c)}
   |                   ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:82:19
   |
LL |         ${index(1 a b c)}
   |                   ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:85:19
   |
LL |         ${index() a b c}
   |                   ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:85:19
   |
LL |         ${index() a b c}
   |                   ^

error: unexpected token: a
  --> $DIR/syntax-errors.rs:87:19
   |
LL |         ${index(1 a b c)}
   |                   ^
   |
note: meta-variable expression must not have trailing tokens
  --> $DIR/syntax-errors.rs:87:19
   |
LL |         ${index(1 a b c)}
   |                   ^

error: meta-variable expression depth must be a literal
  --> $DIR/syntax-errors.rs:94:33
   |
LL |     ( $( $i:ident ),* ) => { ${ index(IDX) } };
   |                                 ^^^^^

error: meta-variables within meta-variable expressions must be referenced using a dollar sign
  --> $DIR/syntax-errors.rs:100:11
   |
LL |         ${count(foo)}
   |           ^^^^^

error: meta-variables within meta-variable expressions must be referenced using a dollar sign
  --> $DIR/syntax-errors.rs:107:11
   |
LL |         ${ignore(bar)}
   |           ^^^^^^

error: unrecognized meta-variable expression
  --> $DIR/syntax-errors.rs:113:33
   |
LL |     ( $( $i:ident ),* ) => { ${ aaaaaaaaaaaaaa(i) } };
   |                                 ^^^^^^^^^^^^^^ help: supported expressions are count, ignore, index and len

error: expected identifier or string literal
  --> $DIR/syntax-errors.rs:38:14
   |
LL |     () => { ${} };
   |              ^^

error: expected identifier, found `"hi"`
  --> $DIR/syntax-errors.rs:44:17
   |
LL |      () => { ${ "hi" } };
   |                 ^^^^ help: try removing `"hi"`

error: expected identifier or string literal
  --> $DIR/syntax-errors.rs:60:33
   |
LL |     ( $( $i:ident ),* ) => { ${ {} } };
   |                                 ^^

error: aborting due to 25 previous errors