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method_signature.go
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/
method_signature.go
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// Copyright (C) 2017 Google 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 jdbg
import "fmt"
// methodSignature represents a method signature
type methodSignature struct {
Parameters []Type
Return Type
}
// accepts returns true if the signature accepts the list of arguments.
func (j *JDbg) accepts(s methodSignature, args []interface{}) bool {
if len(args) != len(s.Parameters) {
return false
}
for i := range args {
if !j.assignable(s.Parameters[i], args[i]) {
return false
}
}
return true
}
// parseMethodSignature returns the signature from the string str.
func (j *JDbg) parseMethodSignature(str string) (methodSignature, error) {
s := methodSignature{}
if str[0] != '(' {
return methodSignature{}, fmt.Errorf("Method signature doesn't start with '('")
}
i := 1
for str[i] != ')' {
ty, err := j.parseSignature(str, &i)
if err != nil {
return methodSignature{}, err
}
s.Parameters = append(s.Parameters, ty)
}
i++
ty, err := j.parseSignature(str, &i)
if err != nil {
return methodSignature{}, err
}
s.Return = ty
return s, nil
}