const_evaluatable_unchecked to const eval
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lcnr
parent
660ca48041
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116d35d401
12 changed files with 51 additions and 42 deletions
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@ -1,5 +1,5 @@
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error: generic parameters may not be used in const operations
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--> $DIR/dependence_lint.rs:13:32
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--> $DIR/dependence_lint.rs:14:32
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LL | let _: [u8; size_of::<*mut T>()]; // error on stable, error with gce
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| ^ cannot perform const operation using `T`
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@ -8,7 +8,7 @@ LL | let _: [u8; size_of::<*mut T>()]; // error on stable, error with gce
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/dependence_lint.rs:20:37
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--> $DIR/dependence_lint.rs:21:37
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LL | let _: [u8; if true { size_of::<T>() } else { 3 }]; // error on stable, error with gce
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| ^ cannot perform const operation using `T`
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@ -17,7 +17,7 @@ LL | let _: [u8; if true { size_of::<T>() } else { 3 }]; // error on stable,
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/dependence_lint.rs:9:9
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--> $DIR/dependence_lint.rs:10:9
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LL | [0; size_of::<*mut T>()]; // lint on stable, error with `generic_const_exprs`
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| ^^^^^^^^^^^^^^^^^^^
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@ -27,7 +27,7 @@ LL | [0; size_of::<*mut T>()]; // lint on stable, error with `generic_const_
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= note: `#[warn(const_evaluatable_unchecked)]` on by default
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/dependence_lint.rs:16:9
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--> $DIR/dependence_lint.rs:17:9
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LL | [0; if false { size_of::<T>() } else { 3 }]; // lint on stable, error with gce
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -1,5 +1,5 @@
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error: overly complex generic constant
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--> $DIR/dependence_lint.rs:16:9
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--> $DIR/dependence_lint.rs:17:9
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LL | [0; if false { size_of::<T>() } else { 3 }]; // lint on stable, error with gce
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ control flow is not supported in generic constants
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@ -7,7 +7,7 @@ LL | [0; if false { size_of::<T>() } else { 3 }]; // lint on stable, error w
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= help: consider moving this anonymous constant into a `const` function
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error: overly complex generic constant
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--> $DIR/dependence_lint.rs:20:17
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--> $DIR/dependence_lint.rs:21:17
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LL | let _: [u8; if true { size_of::<T>() } else { 3 }]; // error on stable, error with gce
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ control flow is not supported in generic constants
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@ -15,7 +15,7 @@ LL | let _: [u8; if true { size_of::<T>() } else { 3 }]; // error on stable,
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= help: consider moving this anonymous constant into a `const` function
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error: unconstrained generic constant
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--> $DIR/dependence_lint.rs:13:12
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--> $DIR/dependence_lint.rs:14:12
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LL | let _: [u8; size_of::<*mut T>()]; // error on stable, error with gce
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| ^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -23,7 +23,7 @@ LL | let _: [u8; size_of::<*mut T>()]; // error on stable, error with gce
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= help: try adding a `where` bound using this expression: `where [(); size_of::<*mut T>()]:`
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error: unconstrained generic constant
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--> $DIR/dependence_lint.rs:9:9
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--> $DIR/dependence_lint.rs:10:9
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LL | [0; size_of::<*mut T>()]; // lint on stable, error with `generic_const_exprs`
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| ^^^^^^^^^^^^^^^^^^^
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@ -1,4 +1,5 @@
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// revisions: full gce
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// compile-flags: -Zdeduplicate-diagnostics=yes
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#![cfg_attr(gce, feature(generic_const_exprs))]
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#![allow(incomplete_features)]
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@ -1,4 +1,5 @@
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// check-pass
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// compile-flags: -Zdeduplicate-diagnostics=yes
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const fn foo<T>() -> usize {
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// We might instead branch on `std::mem::size_of::<*mut T>() < 8` here,
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@ -1,5 +1,5 @@
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/function-call.rs:14:17
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--> $DIR/function-call.rs:15:17
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LL | let _ = [0; foo::<T>()];
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| ^^^^^^^^^^
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@ -1,3 +1,4 @@
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// compile-flags: -Zdeduplicate-diagnostics=yes
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use std::mem::size_of;
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fn test<const N: usize>() {}
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@ -1,5 +1,5 @@
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:9:38
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--> $DIR/complex-expression.rs:10:38
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LL | struct Break0<const N: usize>([u8; { N + 1 }]);
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| ^ cannot perform const operation using `N`
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@ -8,7 +8,7 @@ LL | struct Break0<const N: usize>([u8; { N + 1 }]);
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:12:40
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--> $DIR/complex-expression.rs:13:40
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LL | struct Break1<const N: usize>([u8; { { N } }]);
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| ^ cannot perform const operation using `N`
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@ -17,7 +17,7 @@ LL | struct Break1<const N: usize>([u8; { { N } }]);
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:16:17
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--> $DIR/complex-expression.rs:17:17
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LL | let _: [u8; N + 1];
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| ^ cannot perform const operation using `N`
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@ -26,7 +26,7 @@ LL | let _: [u8; N + 1];
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:21:17
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--> $DIR/complex-expression.rs:22:17
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LL | let _ = [0; N + 1];
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| ^ cannot perform const operation using `N`
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@ -35,7 +35,7 @@ LL | let _ = [0; N + 1];
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:25:45
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--> $DIR/complex-expression.rs:26:45
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LL | struct BreakTy0<T>(T, [u8; { size_of::<*mut T>() }]);
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| ^ cannot perform const operation using `T`
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@ -44,7 +44,7 @@ LL | struct BreakTy0<T>(T, [u8; { size_of::<*mut T>() }]);
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:28:47
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--> $DIR/complex-expression.rs:29:47
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LL | struct BreakTy1<T>(T, [u8; { { size_of::<*mut T>() } }]);
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| ^ cannot perform const operation using `T`
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@ -53,7 +53,7 @@ LL | struct BreakTy1<T>(T, [u8; { { size_of::<*mut T>() } }]);
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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error: generic parameters may not be used in const operations
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--> $DIR/complex-expression.rs:32:32
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--> $DIR/complex-expression.rs:33:32
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LL | let _: [u8; size_of::<*mut T>() + 1];
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| ^ cannot perform const operation using `T`
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@ -62,7 +62,7 @@ LL | let _: [u8; size_of::<*mut T>() + 1];
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= help: use `#![feature(generic_const_exprs)]` to allow generic const expressions
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/complex-expression.rs:37:17
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--> $DIR/complex-expression.rs:38:17
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LL | let _ = [0; size_of::<*mut T>() + 1];
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| ^^^^^^^^^^^^^^^^^^^^^^^
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// check-pass
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// compile-flags: -Zdeduplicate-diagnostics=yes
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#![allow(dead_code)]
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fn foo<T>() {
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/const-evaluatable-unchecked.rs:5:9
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--> $DIR/const-evaluatable-unchecked.rs:6:9
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LL | [0; std::mem::size_of::<*mut T>()];
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -9,7 +9,7 @@ LL | [0; std::mem::size_of::<*mut T>()];
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= note: `#[warn(const_evaluatable_unchecked)]` on by default
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/const-evaluatable-unchecked.rs:16:21
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--> $DIR/const-evaluatable-unchecked.rs:17:21
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LL | let _ = [0; Self::ASSOC];
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| ^^^^^^^^^^^
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= note: for more information, see issue #76200 <https://github.com/rust-lang/rust/issues/76200>
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warning: cannot use constants which depend on generic parameters in types
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--> $DIR/const-evaluatable-unchecked.rs:28:21
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--> $DIR/const-evaluatable-unchecked.rs:29:21
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LL | let _ = [0; Self::ASSOC];
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| ^^^^^^^^^^^
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