/
derive.go
51 lines (45 loc) · 1.07 KB
/
derive.go
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package annotation
// Derive an specified identity and it's attribute list.
// `#[ident]`
// `#[ident(k1=1,k2="2")]`
// `#[ident(k1=[1,2,3],k2=["1","2","3"])]`
type Derive struct {
Identity string `parser:"@Ident"`
Attrs []*NameValue `parser:"('(' (@@ (',' @@)*)? ')')?"`
}
// `#[ident]` only, not contain any attributes.
func (d *Derive) IsHeadless() bool {
return len(d.Attrs) == 0
}
type Derives []*Derive
// ContainHeadless contain headless
func (ds Derives) ContainHeadless(identity string) bool {
for _, v := range ds {
if v.Identity == identity && v.IsHeadless() {
return true
}
}
return false
}
func (ds Derives) Find(identity string) Derives {
ret := make(Derives, 0, len(ds))
for _, v := range ds {
if v.Identity == identity {
ret = append(ret, v)
}
}
return ret
}
func (ds Derives) FindValue(identity, name string) []ValueType {
ret := make([]ValueType, 0, len(ds))
for _, v := range ds {
if v.Identity == identity {
for _, vv := range v.Attrs {
if vv.Name == name {
ret = append(ret, vv.Value)
}
}
}
}
return ret
}