/
types.go
194 lines (174 loc) · 3.75 KB
/
types.go
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package gogen
import (
"fmt"
"strings"
"github.com/go-zookeeper/jute/parser"
)
type typeID int
const (
typeBool typeID = iota
typeByte
typeInt32
typeInt64
typeFloat32
typeFloat64
typeString
typeByteSlice
typeSlice
typeMap
typeClass
)
type goType struct {
typeID typeID
classType string
inner1 *goType
inner2 *goType
}
func (t *goType) String() string {
sb := strings.Builder{}
switch t.typeID {
case typeBool:
sb.WriteString("bool")
case typeByte:
sb.WriteString("byte")
case typeByteSlice:
sb.WriteString("[]byte")
case typeClass:
sb.WriteString(t.classType)
case typeFloat32:
sb.WriteString("float32")
case typeFloat64:
sb.WriteString("float64")
case typeInt32:
sb.WriteString("int32")
case typeInt64:
sb.WriteString("int64")
case typeMap:
sb.WriteString("map[" + t.inner1.String() + "]" + t.inner2.String())
case typeSlice:
sb.WriteString("[]" + t.inner1.String())
case typeString:
sb.WriteString("string")
default:
panic("unknown type")
}
return sb.String()
}
// zeroValue will return the go zero value for the given type
func (t *goType) zeroValue() string {
switch t.typeID {
case typeBool:
return "false"
case typeByte, typeInt32, typeInt64, typeFloat32, typeFloat64:
return "0"
case typeClass:
return t.classType + "{}"
case typeString:
return `""`
}
return "nil"
}
func (t *goType) methodSuffix() string {
switch t.typeID {
case typeBool:
return "Boolean"
case typeByte:
return "Byte"
case typeInt32:
return "Int"
case typeInt64:
return "Long"
case typeFloat32:
return "Float"
case typeFloat64:
return "Double"
case typeString:
return "String"
case typeByteSlice:
return "Buffer"
}
panic("unknown type")
}
func (t *goType) isPrimitive() bool {
switch t.typeID {
case typeBool, typeByte, typeByteSlice, typeFloat32, typeFloat64, typeInt32, typeInt64, typeString:
return true
default:
return false
}
}
func (t *goType) isNillable() bool {
switch t.typeID {
case typeBool, typeByte, typeClass, typeFloat32, typeFloat64, typeInt32, typeInt64, typeString:
return false
default:
return true
}
}
var primTypeMap = map[parser.PTypeID]typeID{
parser.BooleanTypeID: typeBool,
parser.ByteTypeID: typeByte,
parser.IntTypeID: typeInt32,
parser.LongTypeID: typeInt64,
parser.FloatTypeID: typeFloat32,
parser.DoubleTypeID: typeFloat64,
parser.UStringTypeID: typeString,
parser.BufferTypeID: typeByteSlice,
}
func (g *generator) convertType(juteType parser.Type) (*goType, error) {
switch t := juteType.(type) {
case *parser.PType:
if typeID, ok := primTypeMap[t.TypeID]; ok {
return &goType{
typeID: typeID,
}, nil
}
return nil, fmt.Errorf("unknown primative type %v", t.TypeID)
case *parser.VectorType:
innerType, err := g.convertType(t.Type)
if err != nil {
return nil, err
}
return &goType{
typeID: typeSlice,
inner1: innerType,
}, nil
case *parser.MapType:
keyType, err := g.convertType(t.KeyType)
if err != nil {
return nil, err
}
valType, err := g.convertType(t.ValType)
if err != nil {
return nil, err
}
return &goType{
typeID: typeMap,
inner1: keyType,
inner2: valType,
}, nil
case *parser.ClassType:
var prefix string
if t.Namespace != "" {
prefix += g.moduleMap[t.Namespace].name + "."
}
return &goType{
typeID: typeClass,
classType: prefix + t.ClassName,
}, nil
}
return nil, fmt.Errorf("unknown type %T", juteType)
}
// returns the external namespaces for the given type resolving recusively for
// map values and vector inner types.
func extNamespace(typ parser.Type) string {
switch t := typ.(type) {
case *parser.ClassType:
return t.Namespace
case *parser.VectorType:
return extNamespace(t.Type)
case *parser.MapType:
return extNamespace(t.ValType)
}
return ""
}