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/E0015.md | 33 ++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 compiler/rustc_error_codes/src/error_codes/E0015.md (limited to 'compiler/rustc_error_codes/src/error_codes/E0015.md') diff --git a/compiler/rustc_error_codes/src/error_codes/E0015.md b/compiler/rustc_error_codes/src/error_codes/E0015.md new file mode 100644 index 000000000..021a0219d --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0015.md @@ -0,0 +1,33 @@ +A constant item was initialized with something that is not a constant +expression. + +Erroneous code example: + +```compile_fail,E0015 +fn create_some() -> Option { + Some(1) +} + +const FOO: Option = create_some(); // error! +``` + +The only functions that can be called in static or constant expressions are +`const` functions, and struct/enum constructors. + +To fix this error, you can declare `create_some` as a constant function: + +``` +const fn create_some() -> Option { // declared as a const function + Some(1) +} + +const FOO: Option = create_some(); // ok! + +// These are also working: +struct Bar { + x: u8, +} + +const OTHER_FOO: Option = Some(1); +const BAR: Bar = Bar {x: 1}; +``` -- cgit v1.2.3