format

pub fn format(self: CallConv, w: *Writer) Writer.Error!void {
    switch (self) {
        default => {},
        .fastcc,
        .coldcc,
        .ghccc,
        .webkit_jscc,
        .anyregcc,
        .preserve_mostcc,
        .preserve_allcc,
        .swiftcc,
        .cxx_fast_tlscc,
        .tailcc,
        .cfguard_checkcc,
        .swifttailcc,
        .x86_stdcallcc,
        .x86_fastcallcc,
        .arm_apcscc,
        .arm_aapcscc,
        .arm_aapcs_vfpcc,
        .msp430_intrcc,
        .x86_thiscallcc,
        .ptx_kernel,
        .ptx_device,
        .spir_func,
        .spir_kernel,
        .intel_ocl_bicc,
        .x86_64_sysvcc,
        .win64cc,
        .x86_vectorcallcc,
        .hhvmcc,
        .hhvm_ccc,
        .x86_intrcc,
        .avr_intrcc,
        .avr_signalcc,
        .avr_builtincc,
        .amdgpu_vs,
        .amdgpu_gs,
        .amdgpu_ps,
        .amdgpu_cs,
        .amdgpu_kernel,
        .x86_regcallcc,
        .amdgpu_hs,
        .msp430_builtincc,
        .amdgpu_ls,
        .amdgpu_es,
        .aarch64_vector_pcs,
        .aarch64_sve_vector_pcs,
        .amdgpu_gfx,
        .m68k_intrcc,
        .aarch64_sme_preservemost_from_x0,
        .aarch64_sme_preservemost_from_x2,
        .m68k_rtdcc,
        .riscv_vectorcallcc,
        => try w.print(" {s}", .{@tagName(self)}),
        _ => try w.print(" cc{d}", .{@intFromEnum(self)}),
    }
}