let custom_message =
if let token::Literal(token::Lit { kind: token::Str, .. }) = parser.token.kind {
let mut err = cx.struct_span_warn(parser.token.span, "unexpected string literal");
let custom_message =
if let token::Literal(token::Lit { kind: token::Str, .. }) = parser.token.kind {
let mut err = cx.struct_span_warn(parser.token.span, "unexpected string literal");