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/E0317.md | 30 ++++++++++++++++++++++ 1 file changed, 30 insertions(+) create mode 100644 compiler/rustc_error_codes/src/error_codes/E0317.md (limited to 'compiler/rustc_error_codes/src/error_codes/E0317.md') diff --git a/compiler/rustc_error_codes/src/error_codes/E0317.md b/compiler/rustc_error_codes/src/error_codes/E0317.md new file mode 100644 index 000000000..230911c20 --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0317.md @@ -0,0 +1,30 @@ +An `if` expression is missing an `else` block. + +Erroneous code example: + +```compile_fail,E0317 +let x = 5; +let a = if x == 5 { + 1 +}; +``` + +This error occurs when an `if` expression without an `else` block is used in a +context where a type other than `()` is expected. In the previous code example, +the `let` expression was expecting a value but since there was no `else`, no +value was returned. + +An `if` expression without an `else` block has the type `()`, so this is a type +error. To resolve it, add an `else` block having the same type as the `if` +block. + +So to fix the previous code example: + +``` +let x = 5; +let a = if x == 5 { + 1 +} else { + 2 +}; +``` -- cgit v1.2.3