mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 01:26:43 +00:00
63 lines
1.6 KiB
Go
63 lines
1.6 KiB
Go
package set
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
// Set is an implementation of the concept of a set: a collection where all
|
|
// values are conceptually either in or out of the set, but the members are
|
|
// not ordered.
|
|
//
|
|
// This type primarily exists to be the internal type of sets in cty, but
|
|
// it is considered to be at the same level of abstraction as Go's built in
|
|
// slice and map collection types, and so should make no cty-specific
|
|
// assumptions.
|
|
//
|
|
// Set operations are not thread safe. It is the caller's responsibility to
|
|
// provide mutex guarantees where necessary.
|
|
//
|
|
// Set operations are not optimized to minimize memory pressure. Mutating
|
|
// a set will generally create garbage and so should perhaps be avoided in
|
|
// tight loops where memory pressure is a concern.
|
|
type Set struct {
|
|
vals map[int][]interface{}
|
|
rules Rules
|
|
}
|
|
|
|
// NewSet returns an empty set with the membership rules given.
|
|
func NewSet(rules Rules) Set {
|
|
return Set{
|
|
vals: map[int][]interface{}{},
|
|
rules: rules,
|
|
}
|
|
}
|
|
|
|
func NewSetFromSlice(rules Rules, vals []interface{}) Set {
|
|
s := NewSet(rules)
|
|
for _, v := range vals {
|
|
s.Add(v)
|
|
}
|
|
return s
|
|
}
|
|
|
|
func sameRules(s1 Set, s2 Set) bool {
|
|
return s1.rules == s2.rules
|
|
}
|
|
|
|
func mustHaveSameRules(s1 Set, s2 Set) {
|
|
if !sameRules(s1, s2) {
|
|
panic(fmt.Errorf("incompatible set rules: %#v, %#v", s1.rules, s2.rules))
|
|
}
|
|
}
|
|
|
|
// HasRules returns true if and only if the receiving set has the given rules
|
|
// instance as its rules.
|
|
func (s Set) HasRules(rules Rules) bool {
|
|
return s.rules == rules
|
|
}
|
|
|
|
// Rules returns the receiving set's rules instance.
|
|
func (s Set) Rules() Rules {
|
|
return s.rules
|
|
}
|