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[RFC-2011] Expand more expressions cc #44838 Expands `if`, `let`, `match` and also makes `generic_assert_internals` an allowed feature when using `assert!`. `#![feature(generic_assert)]` is still needed to activate everything. ```rust #![feature(generic_assert)] fn fun(a: Option<i32>, b: Option<i32>, c: Option<i32>) { assert!( if a.is_some() { 1 } else { 2 } == 3 && if let Some(elem) = b { elem == 4 } else { false } && match c { Some(_) => true, None => false } ); } fn main() { fun(Some(1), None, Some(2)); } // Assertion failed: assert!( // if a.is_some() { 1 } else { 2 } == 3 // && if let Some(elem) = b { elem == 4 } else { false } // && match c { Some(_) => true, None => false } // ); // // With captures: // a = Some(1) // b = None // c = Some(2) ``` |
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