error[E0423]: expected value, found struct variant `E::B`
  --> $DIR/fn-or-tuple-struct-without-args.rs:36:16
   |
LL |     A(usize),
   |     -------- similarly named tuple variant `A` defined here
LL |     B { a: usize },
   |     -------------- `E::B` defined here
...
LL |     let _: E = E::B;
   |                ^^^-
   |                |  |
   |                |  help: a tuple variant with a similar name exists: `A`
   |                did you mean `E::B { /* fields */ }`?

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:29:20
   |
LL | fn foo(a: usize, b: usize) -> usize { a }
   | ----------------------------------- fn(usize, usize) -> usize {foo} defined here
...
LL |     let _: usize = foo;
   |            -----   ^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize, usize) -> usize {foo}`
help: use parentheses to call this function
   |
LL |     let _: usize = foo(a, b);
   |                       ^^^^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:30:16
   |
LL | struct S(usize, usize);
   | ----------------------- fn(usize, usize) -> S {S} defined here
...
LL |     let _: S = S;
   |            -   ^ expected struct `S`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected struct `S`
             found fn item `fn(usize, usize) -> S {S}`
help: use parentheses to instantiate this tuple struct
   |
LL |     let _: S = S(_, _);
   |                 ^^^^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:31:20
   |
LL | fn bar() -> usize { 42 }
   | ----------------- fn() -> usize {bar} defined here
...
LL |     let _: usize = bar;
   |            -----   ^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn() -> usize {bar}`
help: use parentheses to call this function
   |
LL |     let _: usize = bar();
   |                       ^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:32:16
   |
LL | struct V();
   | ----------- fn() -> V {V} defined here
...
LL |     let _: V = V;
   |            -   ^ expected struct `V`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected struct `V`
             found fn item `fn() -> V {V}`
help: use parentheses to instantiate this tuple struct
   |
LL |     let _: V = V();
   |                 ^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:33:20
   |
LL |     fn baz(x: usize, y: usize) -> usize { x }
   |     ----------------------------------- fn(usize, usize) -> usize {<_ as T>::baz} defined here
...
LL |     let _: usize = T::baz;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize, usize) -> usize {<_ as T>::baz}`
help: use parentheses to call this function
   |
LL |     let _: usize = T::baz(x, y);
   |                          ^^^^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:34:20
   |
LL |     fn bat(x: usize) -> usize { 42 }
   |     ------------------------- fn(usize) -> usize {<_ as T>::bat} defined here
...
LL |     let _: usize = T::bat;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize) -> usize {<_ as T>::bat}`
help: use parentheses to call this function
   |
LL |     let _: usize = T::bat(x);
   |                          ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:35:16
   |
LL |     A(usize),
   |     -------- fn(usize) -> E {E::A} defined here
...
LL |     let _: E = E::A;
   |            -   ^^^^ expected enum `E`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected enum `E`
           found fn item `fn(usize) -> E {E::A}`
help: use parentheses to instantiate this tuple variant
   |
LL |     let _: E = E::A(_);
   |                    ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:37:20
   |
LL |     fn baz(x: usize, y: usize) -> usize { x }
   |     ----------------------------------- fn(usize, usize) -> usize {<X as T>::baz} defined here
...
LL |     let _: usize = X::baz;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize, usize) -> usize {<X as T>::baz}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::baz(x, y);
   |                          ^^^^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:38:20
   |
LL |     fn bat(x: usize) -> usize { 42 }
   |     ------------------------- fn(usize) -> usize {<X as T>::bat} defined here
...
LL |     let _: usize = X::bat;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize) -> usize {<X as T>::bat}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::bat(x);
   |                          ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:39:20
   |
LL |     fn bax(x: usize) -> usize { 42 }
   |     ------------------------- fn(usize) -> usize {<X as T>::bax} defined here
...
LL |     let _: usize = X::bax;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize) -> usize {<X as T>::bax}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::bax(x);
   |                          ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:40:20
   |
LL |     fn bach(x: usize) -> usize;
   |     --------------------------- fn(usize) -> usize {<X as T>::bach} defined here
...
LL |     let _: usize = X::bach;
   |            -----   ^^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `fn(usize) -> usize {<X as T>::bach}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::bach(x);
   |                           ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:41:20
   |
LL |     fn ban(&self) -> usize { 42 }
   |     ---------------------- for<'r> fn(&'r X) -> usize {<X as T>::ban} defined here
...
LL |     let _: usize = X::ban;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `for<'r> fn(&'r X) -> usize {<X as T>::ban}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::ban(_);
   |                          ^^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:42:20
   |
LL |     fn bal(&self) -> usize;
   |     ----------------------- for<'r> fn(&'r X) -> usize {<X as T>::bal} defined here
...
LL |     let _: usize = X::bal;
   |            -----   ^^^^^^ expected `usize`, found fn item
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found fn item `for<'r> fn(&'r X) -> usize {<X as T>::bal}`
help: use parentheses to call this function
   |
LL |     let _: usize = X::bal(_);
   |                          ^^^

error[E0615]: attempted to take value of method `ban` on type `X`
  --> $DIR/fn-or-tuple-struct-without-args.rs:43:22
   |
LL |     let _: usize = X.ban;
   |                      ^^^ method, not a field
   |
help: use parentheses to call the method
   |
LL |     let _: usize = X.ban();
   |                         ^^

error[E0615]: attempted to take value of method `bal` on type `X`
  --> $DIR/fn-or-tuple-struct-without-args.rs:44:22
   |
LL |     let _: usize = X.bal;
   |                      ^^^ method, not a field
   |
help: use parentheses to call the method
   |
LL |     let _: usize = X.bal();
   |                         ^^

error[E0308]: mismatched types
  --> $DIR/fn-or-tuple-struct-without-args.rs:46:20
   |
LL |     let closure = || 42;
   |                   ----- the found closure
LL |     let _: usize = closure;
   |            -----   ^^^^^^^ expected `usize`, found closure
   |            |
   |            expected due to this
   |
   = note: expected type `usize`
           found closure `[closure@$DIR/fn-or-tuple-struct-without-args.rs:45:19: 45:24]`
help: use parentheses to call this closure
   |
LL |     let _: usize = closure();
   |                           ^^

error: aborting due to 17 previous errors

Some errors have detailed explanations: E0308, E0423, E0615.
For more information about an error, try `rustc --explain E0308`.