{"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
        // The element type of the third argument must be a signed integer type of any width:
        let (out_len, element_ty1) = require_simd!(args[1].layout.ty, SimdSecond);
        let (out_len2, element_ty2) = require_simd!(args[2].layout.ty, SimdThird);