{"ast_node_type":"variable","tokens":[{"end":42,"kind":"keyword","start":0,"text":"let"}]}
    let a = f32x4::from([0., 1., 2., 3.]);
    // AArch64 llvm intrinsic: llvm.aarch64.neon.faddv.f32.v4f32
    let e = 6f32;