syntax_data: {"ast_node_type":"other","tokens":[{"end":97,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // Test `val` by computing `lo <= val && val <= hi`, using primitive comparisons.
context_before:                 let fail = target_block(TestBranch::Failure);
context_after:                 let val = Operand::Copy(place);