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/
mangle.go
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/
mangle.go
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package ast
import (
"bytes"
"fmt"
)
// In case we support multiple name mangling schemes
type MangleType int
const (
MANGLE_ARK_UNSTABLE MangleType = iota
)
// TODO GenericInstance -> GenericContext
func TypeReferencesMangledName(mangleType MangleType, typs []*TypeReference, gcon *GenericContext) string {
res := ""
for _, typ := range typs {
res += TypeReferenceMangledName(mangleType, typ, gcon)
}
return res
}
// easier than making a method for all types
func TypeReferenceMangledName(mangleType MangleType, typ *TypeReference, gcon *GenericContext) string {
switch mangleType {
case MANGLE_ARK_UNSTABLE:
res := "_"
for {
if ptr, ok := typ.BaseType.(PointerType); ok {
typ = ptr.Addressee
res += "p"
} else {
break
}
}
switch typ := typ.BaseType.(type) {
case ArrayType:
res += fmt.Sprintf("A%s", TypeReferenceMangledName(mangleType, typ.MemberType, gcon))
case ReferenceType:
var suffix string
if typ.IsMutable {
suffix = "M"
} else {
suffix = "C"
}
res += fmt.Sprintf("R%s%s", suffix, TypeReferenceMangledName(mangleType, typ.Referrer, gcon))
case EnumType:
res += fmt.Sprintf("E%d", len(typ.Members))
for _, mem := range typ.Members {
res += TypeReferenceMangledName(mangleType, &TypeReference{BaseType: mem.Type}, gcon)
}
case StructType:
res += fmt.Sprintf("S%d", len(typ.Members))
for _, mem := range typ.Members {
res += TypeReferenceMangledName(mangleType, mem.Type, gcon)
}
case TupleType:
res += fmt.Sprintf("T%d", len(typ.Members))
for _, mem := range typ.Members {
res += TypeReferenceMangledName(mangleType, mem, gcon)
}
case FunctionType:
str := TypeReferencesMangledName(mangleType, typ.Parameters, gcon)
str += TypeReferenceMangledName(mangleType, typ.Return, gcon)
if typ.Receiver != nil {
str = TypeReferenceMangledName(mangleType, typ.Receiver, gcon) + str
}
res += fmt.Sprintf("%dFT%s", len(str), str)
case *NamedType, PrimitiveType:
name := typ.TypeName()
res += fmt.Sprintf("%d%s", len(name), name)
case InterfaceType:
str := ""
for _, fn := range typ.Functions {
str += fn.MangledName(mangleType, gcon)
}
res += fmt.Sprintf("%dI%s", len(str), str)
case *SubstitutionType:
if sub := gcon.GetSubstitutionType(typ); sub != nil {
it := gcon.Get(&TypeReference{BaseType: typ})
if it.BaseType == typ {
panic("INTERNAL ERROR: Substitution type mapped to itself")
}
res = TypeReferenceMangledName(mangleType, it, gcon)
} else {
res = typ.Name
}
default:
panic("unimplemented type mangling scheme")
}
gas := TypeReferencesMangledName(mangleType, typ.GenericArguments, gcon)
if len(gas) > 0 {
res += "GA" + gas
}
return res
default:
panic("")
}
}
func (v Module) MangledName(typ MangleType) string {
switch typ {
case MANGLE_ARK_UNSTABLE:
buf := new(bytes.Buffer)
for _, mod := range v.Name.Parts {
buf.WriteString("_M")
buf.WriteString(fmt.Sprintf("%d", len(mod)))
buf.WriteString(mod)
}
return buf.String()
default:
panic("")
}
}
func (v Function) MangledName(typ MangleType, gcon *GenericContext) string {
if v.Name == "main" {
return "main" // TODO make sure only one main function
}
switch typ {
case MANGLE_ARK_UNSTABLE:
var prefix string
if v.Type.Receiver != nil {
prefix = "m"
} else if v.StaticReceiverType != nil {
prefix = "s"
}
result := fmt.Sprintf("_%sF%d%s", prefix, len(v.Name), v.Name)
for _, arg := range v.Parameters {
result += TypeReferenceMangledName(typ, arg.Variable.Type, gcon)
}
result += TypeReferenceMangledName(typ, v.Type.Return, gcon)
if v.Type.Receiver != nil {
result = TypeReferenceMangledName(typ, v.Type.Receiver, gcon) + result
} else if v.StaticReceiverType != nil {
result = TypeReferenceMangledName(typ, &TypeReference{BaseType: v.StaticReceiverType}, gcon) + result
}
result = v.ParentModule.MangledName(typ) + result
return result
default:
panic("")
}
}
func (v Variable) MangledName(typ MangleType) string {
switch typ {
case MANGLE_ARK_UNSTABLE:
result := fmt.Sprintf("_V%d%s", len(v.Name), v.Name)
return result
default:
panic("")
}
}