syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     //       inefficient, revisit this when performance becomes an issue.
context_before:                     // NOTE: Creating a new Expr and wrapping a Cast inside of it may be
context_after:                     let cast_expr = self.thir.exprs.push(Expr {