这儿对泛型的约束很神奇,竟然是这样写Quantity<{ UL.unit_mul(UR) }>: ,如果去掉这个where,则会报错unconstrained generic constant。虽然现在还不懂是什么意思... error: unconstrained generic constant --> src\lib.rs:156:5 | 156 | type Output = Quantity<{ UL.unit_mul(UR) }>; | ^^^ | help:...
{} | | | struct/enum construction is not supported in generic constants | = help: consider moving this anonymous constant into a `const` function --- Saved the actual stderr to "/checkout/obj/build/x86_64-unknown-linux-gnu/test/ui/dropck/unconstrained_const_param_on_drop/unconstrained_...
const_heap feature can be used to leak mutable memory into final value of constant #129233 commented on Feb 14, 2025 • 0 new comments very slow `type_check_crate` stage after error is already thrown #109023 commented on Feb 14, 2025 • 0 new comments rustc consumes > 50GB ...
Or, phrased differently, when you heap-allocate memory, the result- ing pointer has an unconstrained lifetime—its lifetime is however long your program keeps it alive. The primary mechanism for interacting with the heap in Rust is the Box type. When you write Box::new(value), the value ...
在本文中，where [(); {(W + 31 + (!S) as usize)/32}]:表示或多或少：“* 其中[(); {...
PR - x86_64-gnu-llvm-18 unconstrained generic constant PR - x86_64-gnu-llvm-18 Process completed with exit code 1. PR - mingw-check The job was canceled because "_1_1_0_x86_64-gnu-llvm_sh" failed. PR - mingw-check The operation was canceled. PR - x86_64-gnu-tools The job...
super-unconstrained (rust-lang/rust#130367, rust-lang/rust#125989) supertrait-assoc-ty-unsoundness (rust-lang/rust#125989) supertrait-item-shadowing (rust-lang/rust#125782, rust-lang/rust#125989) tag (rust-lang/rust#125989) tcx-cx (rust-lang/rust#125989) tidy-2024 (rust-lang/rust#...
error: unconstrained opaque type --> $DIR/feature-gate-impl_trait_in_assoc_type.rs:6:16 | LL | type Bar = impl std::fmt::Debug; | ^^^ | = note: `Bar` must be used in combination with a concrete type within the same impl error: unconstrained opaque type --> $DIR/feature-gate...
Clarified error message for unconstrained const parameters (Add help note to unconstrained const parameter #76401) Extended existing tests for min_const_generics (Add a bunch of const-generic revisions for min_const_generics #75322) Added tests for min_const_generics (Add regression test for #727...
//~^ ERROR generic parameters may not be used in const operations //~| ERROR constant provided when a type was expected { fn new() -> Self { Node::new() } } struct SmallVec<T1>(T1); fn main() {} 18 changes: 18 additions & 0 deletions 18 tests/ui/const-generics/generic_const...