John Boiles created THRIFT-4901:
-----------------------------------
Summary: Go fails to compile when a struct field is a typedef to a
struct
Key: THRIFT-4901
URL: https://issues.apache.org/jira/browse/THRIFT-4901
Project: Thrift
Issue Type: Task
Components: Go - Compiler
Affects Versions: 0.13.0
Reporter: John Boiles
Given two thrift files:
{code}
# TypedefNamespaceTestA.thrift
namespace go typedef.namespace.testa
struct ThingA {
1: bool value
}
{code}
{code}
# TypedefNamespaceTestB.thrift
include "TypedefNamespaceTestA.thrift"
typedef TypedefNamespaceTestA.ThingA TThingA
struct ThingB {
1: TThingA value
}
{code}
The Thrift Go compiler generates code like:
{code:go}
type TThingA *testa.ThingA
type ThingB struct {
Value *TThingA `thrift:"value,1" db:"value" json:"value"`
}
// ...irrelevant code omitted...
func (p *ThingB) ReadField1(iprot thrift.TProtocol) error {
p.Value = &testa.ThingA{} // Fails to compile
if err := p.Value.Read(iprot); err != nil { // Fails to compile
// ...irrelevant code omitted...
func (p *ThingB) writeField1(oprot thrift.TProtocol) (err error) {
if err := oprot.WriteFieldBegin("value", thrift.STRUCT, 1); err != nil {
return thrift.PrependError(fmt.Sprintf("%T write field begin error 1:value:
", p), err) }
if err := p.Value.Write(oprot); err != nil { // Fails to compile
return thrift.PrependError(fmt.Sprintf("%T error writing struct: ",
p.Value), err)
}
/ ...irrelevant code omitted...
{code}
This causes the following build failures:
{code}
gopath/src/typedefnamespacetestb/TypedefNamespaceTestB.go:88:11: cannot use
&testa.ThingA literal (type *testa.ThingA) as type *TThingA in assignment
gopath/src/typedefnamespacetestb/TypedefNamespaceTestB.go:89:20: p.Value.Read
undefined (type *TThingA has no field or method Read)
gopath/src/typedefnamespacetestb/TypedefNamespaceTestB.go:111:20: p.Value.Write
undefined (type *TThingA has no field or method Write)
{code}
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