syntax_data: {"ast_node_type":"other","tokens":[{"end":92,"kind":"keyword","start":0,"text":"dcx.emit_err(InvalidFloatLiteralWidth"}]}
source_snippet:                 dcx.emit_err(InvalidFloatLiteralWidth { span, width: suf[1..].to_string() })
context_before:                 // If it looks like a width, try to be helpful.
context_after:             } else {