From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- .../rustc_error_codes/src/error_codes/E0118.md | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 compiler/rustc_error_codes/src/error_codes/E0118.md (limited to 'compiler/rustc_error_codes/src/error_codes/E0118.md') diff --git a/compiler/rustc_error_codes/src/error_codes/E0118.md b/compiler/rustc_error_codes/src/error_codes/E0118.md new file mode 100644 index 000000000..cfabae1a6 --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0118.md @@ -0,0 +1,43 @@ +An inherent implementation was defined for something which isn't a struct, +enum, union, or trait object. + +Erroneous code example: + +```compile_fail,E0118 +impl T { // error: no nominal type found for inherent implementation + fn get_state(&self) -> String { + // ... + } +} +``` + +To fix this error, please implement a trait on the type or wrap it in a struct. +Example: + +``` +// we create a trait here +trait LiveLongAndProsper { + fn get_state(&self) -> String; +} + +// and now you can implement it on T +impl LiveLongAndProsper for T { + fn get_state(&self) -> String { + "He's dead, Jim!".to_owned() + } +} +``` + +Alternatively, you can create a newtype. A newtype is a wrapping tuple-struct. +For example, `NewType` is a newtype over `Foo` in `struct NewType(Foo)`. +Example: + +``` +struct TypeWrapper(T); + +impl TypeWrapper { + fn get_state(&self) -> String { + "Fascinating!".to_owned() + } +} +``` -- cgit v1.2.3