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iface.go
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iface.go
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/*
* Copyright 2022 ByteDance Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package rt
import (
`reflect`
)
type Method struct {
Id int
Vt *GoType
}
func AsMethod(id int, vt *GoType) Method {
return Method {
Id: id,
Vt: vt,
}
}
func GetMethod(tp interface{}, name string) Method {
if tp == nil {
panic("value must be an interface pointer")
} else if vt := reflect.TypeOf(tp); vt.Kind() != reflect.Ptr {
panic("value must be an interface pointer")
} else if et := vt.Elem(); et.Kind() != reflect.Interface {
panic("value must be an interface pointer")
} else if mm, ok := et.MethodByName(name); !ok {
panic("interface " + vt.Elem().String() + " does not have method " + name)
} else {
return AsMethod(mm.Index, UnpackType(et))
}
}