syntax_data: {"ast_node_type":"import","tokens":[{"end":52,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //!   suitable for use as an argument to an `Rvalue`
context_before: //! - `as_operand` -- evaluates the value and yields an `Operand`,
context_after: //! - `as_temp` -- evaluates into a temporary; this is similar to `as_operand`