Function protoDeclToFunction

tools/compiler/compiler.go:406–433

(decl *celpb.Decl)

}

func protoDeclToFunction(decl *celpb.Decl) (*env.Function, error) {
	declFn := decl.GetFunction()
	if declFn == nil {
		return nil, nil
	}
	overloads := make([]*env.Overload, 0, len(declFn.GetOverloads()))
	for _, o := range declFn.GetOverloads() {
		args := make([]*env.TypeDesc, 0, len(o.GetParams()))
		for _, p := range o.GetParams() {
			t, err := types.ProtoAsType(p)
			if err != nil {
				return nil, err
			}
			args = append(args, env.SerializeTypeDesc(t))
		}
		res, err := types.ProtoAsType(o.GetResultType())
		if err != nil {
			return nil, err
		}
		ret := env.SerializeTypeDesc(res)
		if o.IsInstanceFunction {
			overloads = append(overloads, env.NewMemberOverload(o.GetOverloadId(), args[0], args[1:], ret))
		} else {
			overloads = append(overloads, env.NewOverload(o.GetOverloadId(), args, ret))
		}
	}
	return env.NewFunction(decl.GetName(), overloads...), nil
}

// TypeDescriptorSetFile returns an EnvOption which loads type descriptors from a file.
// The file must be in binary format.