syntax_data: {"ast_node_type":"variable","tokens":[{"end":84,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                             let place = unpack!(block = this.as_place(block, expr));
context_before:                         thir::InlineAsmOperand::InOut { reg, late, expr } => {
context_after:                             mir::InlineAsmOperand::InOut {