Weird Rust Expression Quirks

Rust’s never type '!' can coerce into any type, enabling 'return', 'break', and 'continue' to be used as expressions in various contexts.

Assignment expressions and macros return unit '()', allowing comparisons and chains of assignments or assertions.

Range syntax ('..', '..=', etc.) can be combined and nested to form complex debuggable range expressions.

Weak keywords like 'union' and unicode identifiers allow using keywords in function names and identifiers unconventionally.

Fully qualified function pointer syntax with generics can be passed directly as closures or function arguments.

Grouped 'use' statements and module re-exports enable recursive module paths and infinite nesting.

Nested match expressions and match guards with nested if statements illustrate complex control flow patterns.

Chained operators and fake macro calls demonstrate that operators like '!' can be used to build divergent or debug-compliant constructs.