syntax_data: {"ast_node_type":"other","tokens":[{"end":98,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! decl macro that expands like any other, and the code goes through parsing, name resolution and
context_before: //! Up until MIR building, this attribute has absolutely no effect. The `mir!` macro is a normal
context_after: //! type checking like all other code. In MIR building we finally detect whether this attribute is