mirror of https://github.com/rust-lang/rust
254 lines
7.3 KiB
Plaintext
254 lines
7.3 KiB
Plaintext
error[E0606]: casting `*const U` as `*const V` is invalid
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--> $DIR/cast-rfc0401.rs:3:5
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LL | u as *const V
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| ^^^^^^^^^^^^^
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= note: vtable kinds may not match
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error[E0606]: casting `*const U` as `*const str` is invalid
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--> $DIR/cast-rfc0401.rs:8:5
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LL | u as *const str
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| ^^^^^^^^^^^^^^^
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= note: vtable kinds may not match
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error[E0609]: no field `f` on type `fn() {main}`
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--> $DIR/cast-rfc0401.rs:65:18
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LL | let _ = main.f as *const u32;
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| ^ unknown field
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error[E0605]: non-primitive cast: `*const u8` as `&u8`
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--> $DIR/cast-rfc0401.rs:29:13
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LL | let _ = v as &u8;
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| ^^^^^^^^ invalid cast
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help: consider borrowing the value
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LL - let _ = v as &u8;
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LL + let _ = &*v;
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error[E0605]: non-primitive cast: `*const u8` as `E`
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--> $DIR/cast-rfc0401.rs:30:13
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LL | let _ = v as E;
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| ^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
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error[E0605]: non-primitive cast: `*const u8` as `fn()`
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--> $DIR/cast-rfc0401.rs:31:13
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LL | let _ = v as fn();
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| ^^^^^^^^^ invalid cast
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error[E0605]: non-primitive cast: `*const u8` as `(u32,)`
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--> $DIR/cast-rfc0401.rs:32:13
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LL | let _ = v as (u32,);
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| ^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
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error[E0605]: non-primitive cast: `Option<&*const u8>` as `*const u8`
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--> $DIR/cast-rfc0401.rs:33:13
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LL | let _ = Some(&v) as *const u8;
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| ^^^^^^^^^^^^^^^^^^^^^ an `as` expression can only be used to convert between primitive types or to coerce to a specific trait object
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error[E0606]: casting `*const u8` as `f32` is invalid
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--> $DIR/cast-rfc0401.rs:35:13
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LL | let _ = v as f32;
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| ^^^^^^^^
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error[E0606]: casting `fn() {main}` as `f64` is invalid
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--> $DIR/cast-rfc0401.rs:36:13
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LL | let _ = main as f64;
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| ^^^^^^^^^^^
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error[E0606]: casting `&*const u8` as `usize` is invalid
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--> $DIR/cast-rfc0401.rs:37:13
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LL | let _ = &v as usize;
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| ^^^^^^^^^^^
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= help: cast through a raw pointer first
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error[E0606]: casting `f32` as `*const u8` is invalid
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--> $DIR/cast-rfc0401.rs:38:13
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LL | let _ = f as *const u8;
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| ^^^^^^^^^^^^^^
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error[E0054]: cannot cast `i32` as `bool`
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--> $DIR/cast-rfc0401.rs:39:13
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LL | let _ = 3_i32 as bool;
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| ^^^^^^^^^^^^^
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help: compare with zero instead
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LL | let _ = 3_i32 != 0;
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| ~~~~
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error[E0054]: cannot cast `E` as `bool`
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--> $DIR/cast-rfc0401.rs:40:13
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LL | let _ = E::A as bool;
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| ^^^^^^^^^^^^ unsupported cast
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error[E0604]: only `u8` can be cast as `char`, not `u32`
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--> $DIR/cast-rfc0401.rs:41:13
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LL | let _ = 0x61u32 as char;
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| ^^^^^^^^^^^^^^^
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| |
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| invalid cast
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| help: try `char::from_u32` instead: `char::from_u32(0x61u32)`
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error[E0606]: casting `bool` as `f32` is invalid
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--> $DIR/cast-rfc0401.rs:43:13
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LL | let _ = false as f32;
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| ^^^^^^^^^^^^
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= help: cast through an integer first
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error[E0606]: casting `E` as `f32` is invalid
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--> $DIR/cast-rfc0401.rs:44:13
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LL | let _ = E::A as f32;
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| ^^^^^^^^^^^
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= help: cast through an integer first
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error[E0606]: casting `char` as `f32` is invalid
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--> $DIR/cast-rfc0401.rs:45:13
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LL | let _ = 'a' as f32;
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| ^^^^^^^^^^
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= help: cast through an integer first
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error[E0606]: casting `bool` as `*const u8` is invalid
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--> $DIR/cast-rfc0401.rs:47:13
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LL | let _ = false as *const u8;
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| ^^^^^^^^^^^^^^^^^^
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error[E0606]: casting `E` as `*const u8` is invalid
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--> $DIR/cast-rfc0401.rs:48:13
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LL | let _ = E::A as *const u8;
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| ^^^^^^^^^^^^^^^^^
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error[E0606]: casting `char` as `*const u8` is invalid
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--> $DIR/cast-rfc0401.rs:49:13
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LL | let _ = 'a' as *const u8;
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| ^^^^^^^^^^^^^^^^
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error[E0606]: cannot cast `usize` to a pointer that is wide
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--> $DIR/cast-rfc0401.rs:51:24
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LL | let _ = 42usize as *const [u8];
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| ------- ^^^^^^^^^^^ creating a `*const [u8]` requires both an address and a length
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| |
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| consider casting this expression to `*const ()`, then using `core::ptr::from_raw_parts`
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error[E0607]: cannot cast thin pointer `*const u8` to fat pointer `*const [u8]`
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--> $DIR/cast-rfc0401.rs:52:13
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LL | let _ = v as *const [u8];
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| ^^^^^^^^^^^^^^^^
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error[E0606]: casting `&dyn Foo` as `*const str` is invalid
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--> $DIR/cast-rfc0401.rs:54:13
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LL | let _ = foo as *const str;
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| ^^^^^^^^^^^^^^^^^
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error[E0606]: casting `&dyn Foo` as `*mut str` is invalid
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--> $DIR/cast-rfc0401.rs:55:13
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LL | let _ = foo as *mut str;
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| ^^^^^^^^^^^^^^^
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error[E0606]: casting `fn() {main}` as `*mut str` is invalid
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--> $DIR/cast-rfc0401.rs:56:13
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LL | let _ = main as *mut str;
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| ^^^^^^^^^^^^^^^^
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error[E0606]: casting `&f32` as `*mut f32` is invalid
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--> $DIR/cast-rfc0401.rs:57:13
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LL | let _ = &f as *mut f32;
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| ^^^^^^^^^^^^^^
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error[E0606]: casting `&f32` as `*const f64` is invalid
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--> $DIR/cast-rfc0401.rs:58:13
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LL | let _ = &f as *const f64;
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| ^^^^^^^^^^^^^^^^
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error[E0606]: casting `*const [i8]` as `usize` is invalid
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--> $DIR/cast-rfc0401.rs:59:13
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LL | let _ = fat_sv as usize;
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| ^^^^^^^^^^^^^^^
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= help: cast through a thin pointer first
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error[E0606]: casting `*const dyn Foo` as `*const [u16]` is invalid
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--> $DIR/cast-rfc0401.rs:68:13
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LL | let _ = cf as *const [u16];
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| ^^^^^^^^^^^^^^^^^^
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= note: vtable kinds may not match
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error[E0606]: casting `*const dyn Foo` as `*const dyn Bar` is invalid
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--> $DIR/cast-rfc0401.rs:69:13
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LL | let _ = cf as *const dyn Bar;
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| ^^^^^^^^^^^^^^^^^^^^
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= note: vtable kinds may not match
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error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/cast-rfc0401.rs:53:13
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LL | let _ = fat_v as *const dyn Foo;
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| ^^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `[u8]`
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= note: required for the cast from `*const [u8]` to `*const dyn Foo`
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error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/cast-rfc0401.rs:62:13
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LL | let _ = a as *const dyn Foo;
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| ^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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= note: required for the cast from `*const str` to `*const dyn Foo`
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error[E0606]: casting `&{float}` as `f32` is invalid
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--> $DIR/cast-rfc0401.rs:71:30
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LL | vec![0.0].iter().map(|s| s as f32).collect::<Vec<f32>>();
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| ^^^^^^^^
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help: dereference the expression
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LL | vec![0.0].iter().map(|s| *s as f32).collect::<Vec<f32>>();
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| +
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error: aborting due to 34 previous errors
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Some errors have detailed explanations: E0054, E0277, E0604, E0605, E0606, E0607, E0609.
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For more information about an error, try `rustc --explain E0054`.
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