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generate: The generics idea didn't work, use type names instead

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This commit is contained in:
Sasha Koshka 2025-08-06 19:39:41 -04:00
parent a99d4dee66
commit a270c22cb9
1 changed files with 48 additions and 25 deletions
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67
generate/generate.go
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@ -67,6 +67,7 @@ type Generator struct {
type decodeBranchRequest struct {
hash [16]byte
typ Type
name string
}
func (this *Generator) Generate(protocol *Protocol) (n int, err error) {
@ -102,9 +103,9 @@ func (this *Generator) Generate(protocol *Protocol) (n int, err error) {
// request queue
for {
hash, typ, ok := this.pullDecodeBranchRequest()
hash, typ, name, ok := this.pullDecodeBranchRequest()
if !ok { break }
nn, err := this.generateDecodeBranch(hash, typ)
nn, err := this.generateDecodeBranch(hash, typ, name)
n += nn; if err != nil { return n, err }
}
@ -193,7 +194,7 @@ func (this *Generator) generateTypedef(name string, typ Type) (n int, err error)
nn, err = this.iprintf("}\n")
n += nn; if err != nil { return n, err }
nn, err = this.generateDecodeValue(typ, "this", "tag")
nn, err = this.generateDecodeValue(typ, name, "this", "tag")
n += nn; if err != nil { return n, err }
nn, err = this.iprintf("return n, nil\n")
n += nn; if err != nil { return n, err }
@ -282,7 +283,7 @@ func (this *Generator) generateMessage(method uint16, message Message) (n int, e
nn, err = this.iprintf("}\n")
n += nn; if err != nil { return n, err }
nn, err = this.generateDecodeValue(message.Type, "this", "tag")
nn, err = this.generateDecodeValue(message.Type, this.resolveMessageName(message.Name), "this", "tag")
n += nn; if err != nil { return n, err }
nn, err = this.iprintf("return n, nil\n")
n += nn; if err != nil { return n, err }
@ -471,7 +472,10 @@ func (this *Generator) generateEncodeValue(typ Type, valueSource, tagSource stri
// - n int
// - err error
// - nn int
func (this *Generator) generateDecodeValue(typ Type, valueSource, tagSource string) (n int, err error) {
//
// The typeName paramterer is handled in the way described in the documentation
// for [Generator.generateDecodeBranch].
func (this *Generator) generateDecodeValue(typ Type, typeName, valueSource, tagSource string) (n int, err error) {
switch typ := typ.(type) {
case TypeInt:
// SI: (none)
@ -537,7 +541,7 @@ func (this *Generator) generateDecodeValue(typ Type, valueSource, tagSource stri
}
case TypeArray:
// OTA: <length: UN> <elementTag: tape.Tag> <values>*
nn, err := this.generateDecodeBranchCall(typ, valueSource, tagSource)
nn, err := this.generateDecodeBranchCall(typ, typeName, valueSource, tagSource)
n += nn; if err != nil { return n, err }
case TypeTable:
// KTV: <length: UN> (<key: U16> <tag: Tag> <value>)*
@ -549,7 +553,7 @@ func (this *Generator) generateDecodeValue(typ Type, valueSource, tagSource stri
n += nn; if err != nil { return n, err }
case TypeTableDefined:
// KTV: <length: UN> (<key: U16> <tag: Tag> <value>)*
nn, err := this.generateDecodeBranchCall(typ, valueSource, tagSource)
nn, err := this.generateDecodeBranchCall(typ, typeName, valueSource, tagSource)
n += nn; if err != nil { return n, err }
case TypeNamed:
// WHATEVER: [WHATEVER]
@ -576,24 +580,36 @@ func (this *Generator) generateDecodeValue(typ Type, valueSource, tagSource stri
// - n int
// - err error
// - nn int
func (this *Generator) generateDecodeBranchCall(typ Type, valueSource, tagSource string) (n int, err error) {
//
// The typeName paramterer is handled in the way described in the documentation
// for [Generator.generateDecodeBranch].
func (this *Generator) generateDecodeBranchCall(typ Type, typeName, valueSource, tagSource string) (n int, err error) {
hash := HashType(typ)
nn, err := this.iprintf("nn, err = %s(%s, decoder, %s)\n", this.decodeBranchName(hash), valueSource, tagSource)
nn, err := this.iprintf(
"nn, err = %s(%s, decoder, %s)\n",
this.decodeBranchName(hash, typeName), valueSource, tagSource)
n += nn; if err != nil { return n, err }
nn, err = this.generateErrorCheck()
n += nn; if err != nil { return n, err }
this.pushDecodeBranchRequest(hash, typ)
this.pushDecodeBranchRequest(hash, typ, typeName)
return n, nil
}
// generateDecodeBranch generates an aggregate decoder function definition for a
// specified type. It assumes that hash == HashType(typ).
func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type) (n int, err error) {
nn, err := this.iprintf("\nfunc %s[T ~", this.decodeBranchName(hash))
// specified type. It assumes that hash == HashType(typ). If typeName is not
// empty, it will be used as the type in the argument list instead of the result
// of [Generator.generateType].
func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type, typeName string) (n int, err error) {
nn, err := this.iprintf("\nfunc %s(this *", this.decodeBranchName(hash, typeName))
n += nn; if err != nil { return n, err }
if typeName == "" {
nn, err = this.generateType(typ)
n += nn; if err != nil { return n, err }
nn, err = this.printf("](this *T, decoder *tape.Decoder, tag tape.Tag) (n int, err error) {\n")
} else {
nn, err = this.print(typeName)
n += nn; if err != nil { return n, err }
}
nn, err = this.printf(", decoder *tape.Decoder, tag tape.Tag) (n int, err error) {\n")
n += nn; if err != nil { return n, err }
this.push()
@ -665,7 +681,7 @@ func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type) (n int, err
nn, err = this.iprintf("for index := range int(%s) {\n", lengthVar)
n += nn; if err != nil { return n, err }
this.push()
nn, err = this.generateDecodeValue(typ.Element, "(*this)[index]", elementTagVar)
nn, err = this.generateDecodeValue(typ.Element, "", "(*this)[index]", elementTagVar)
n += nn; if err != nil { return n, err }
this.pop()
nn, err = this.iprintf("}\n")
@ -740,7 +756,9 @@ func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type) (n int, err
n += nn; if err != nil { return n, err }
// decode payload
nn, err = this.generateDecodeValue(field.Type, fmt.Sprintf("&(this.%s)", field.Name), fieldTagVar)
nn, err = this.generateDecodeValue(
field.Type, "",
fmt.Sprintf("&(this.%s)", field.Name), fieldTagVar)
n += nn; if err != nil { return n, err }
this.pop()
}
@ -775,31 +793,36 @@ func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type) (n int, err
return n, nil
}
func (this *Generator) decodeBranchName(hash [16]byte) string {
func (this *Generator) decodeBranchName(hash [16]byte, name string) string {
if name == "" {
return fmt.Sprintf("decodeBranch_%s", hex.EncodeToString(hash[:]))
} else {
return fmt.Sprintf("decodeBranch_%s_%s", hex.EncodeToString(hash[:]), name)
}
}
// pushDecodeBranchRequest pushes a new branch decode function request to the
// back of the queue, if it is not already in the queue.
func (this *Generator) pushDecodeBranchRequest(hash [16]byte, typ Type) {
func (this *Generator) pushDecodeBranchRequest(hash [16]byte, typ Type, name string) {
for _, item := range this.decodeBranchRequestQueue {
if item.hash == hash { return }
if item.hash == hash && item.name == name { return }
}
this.decodeBranchRequestQueue = append(this.decodeBranchRequestQueue, decodeBranchRequest {
hash: hash,
typ: typ,
name: name,
})
}
// pullDecodeBranchRequest pulls a branch decode function request from the front
// of the queue.
func (this *Generator) pullDecodeBranchRequest() (hash [16]byte, typ Type, ok bool) {
func (this *Generator) pullDecodeBranchRequest() (hash [16]byte, typ Type, name string, ok bool) {
if len(this.decodeBranchRequestQueue) < 1 {
return [16]byte { }, nil, false
return [16]byte { }, nil, "", false
}
request := this.decodeBranchRequestQueue[0]
this.decodeBranchRequestQueue = this.decodeBranchRequestQueue[1:]
return request.hash, request.typ, true
return request.hash, request.typ, request.name, true
}
func (this *Generator) generateErrorCheck() (n int, err error) {