vendor/github.com/hashicorp/hil/ast/variables_helper.go

   1 package ast
   2
   3 import "fmt"
   4
   5 func VariableListElementTypesAreHomogenous(variableName string, list []Variable) (Type, error) {
   6         if len(list) == 0 {
   7                 return TypeInvalid, fmt.Errorf("list %q does not have any elements so cannot determine type.", variableName)
   8         }
   9
  10         elemType := TypeUnknown
  11         for _, v := range list {
  12                 if v.Type == TypeUnknown {
  13                         continue
  14                 }
  15
  16                 if elemType == TypeUnknown {
  17                         elemType = v.Type
  18                         continue
  19                 }
  20
  21                 if v.Type != elemType {
  22                         return TypeInvalid, fmt.Errorf(
  23                                 "list %q does not have homogenous types. found %s and then %s",
  24                                 variableName,
  25                                 elemType, v.Type,
  26                         )
  27                 }
  28
  29                 elemType = v.Type
  30         }
  31
  32         return elemType, nil
  33 }
  34
  35 func VariableMapValueTypesAreHomogenous(variableName string, vmap map[string]Variable) (Type, error) {
  36         if len(vmap) == 0 {
  37                 return TypeInvalid, fmt.Errorf("map %q does not have any elements so cannot determine type.", variableName)
  38         }
  39
  40         elemType := TypeUnknown
  41         for _, v := range vmap {
  42                 if v.Type == TypeUnknown {
  43                         continue
  44                 }
  45
  46                 if elemType == TypeUnknown {
  47                         elemType = v.Type
  48                         continue
  49                 }
  50
  51                 if v.Type != elemType {
  52                         return TypeInvalid, fmt.Errorf(
  53                                 "map %q does not have homogenous types. found %s and then %s",
  54                                 variableName,
  55                                 elemType, v.Type,
  56                         )
  57                 }
  58
  59                 elemType = v.Type
  60         }
  61
  62         return elemType, nil
  63 }