Function checkDependency

dql/parser.go:763–789

(vl []*Vars)

}

func checkDependency(vl []*Vars) error {
	needs, defines := flatten(vl)

	needs = x.RemoveDuplicates(needs)
	lenBefore := len(defines)
	defines = x.RemoveDuplicates(defines)

	if len(defines) != lenBefore {
		return errors.Errorf("Some variables are declared multiple times.")
	}
	if len(defines) > len(needs) {
		return errors.Errorf("Some variables are defined but not used\nDefined:%v\nUsed:%v\n",
			defines, needs)
	}
	if len(defines) < len(needs) {
		return errors.Errorf("Some variables are used but not defined\nDefined:%v\nUsed:%v\n",
			defines, needs)
	}

	for i := range defines {
		if defines[i] != needs[i] {
			return errors.Errorf("Variables are not used properly. \nDefined:%v\nUsed:%v\n",
				defines, needs)
		}
	}
	return nil
}

func (gq *GraphQuery) collectVars(v *Vars) {
	if gq.Var != "" {