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types.go
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types.go
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/*
* Copyright (c) 2022 The GoPlus Authors (goplus.org). All rights reserved.
*
* 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 types
import (
"go/token"
"go/types"
"unsafe"
"github.com/goplus/gogen"
)
// -----------------------------------------------------------------------------
var (
Void = types.Typ[types.UntypedNil]
UnsafePointer = types.Typ[types.UnsafePointer]
Int = types.Typ[types.Int32]
Uint = types.Typ[types.Uint32]
Long = types.Typ[uintptr(types.Int32)+unsafe.Sizeof(0)>>3] // int32/int64
Ulong = types.Typ[uintptr(types.Uint32)+unsafe.Sizeof(0)>>3] // uint32/uint64
NotImpl = UnsafePointer
LongDouble = types.Typ[types.Float64]
)
func NotVoid(t types.Type) bool {
return t != Void
}
func MangledName(tag, name string) string {
return tag + "_" + name // TODO: use sth to replace _
}
// -----------------------------------------------------------------------------
var (
ValistTag types.Type
Valist types.Type = types.NewSlice(gogen.TyEmptyInterface)
)
func init() {
vaTag := types.NewTypeName(token.NoPos, types.Unsafe, MangledName("struct", "__va_list_tag"), nil)
ValistTag = types.NewNamed(vaTag, types.NewStruct(nil, nil), nil)
types.Universe.Insert(vaTag)
}
// -----------------------------------------------------------------------------
func NewFunc(params, results *types.Tuple, variadic bool) *types.Signature {
return gogen.NewCSignature(params, results, variadic)
}
func NewPointer(typ types.Type) types.Type {
switch t := typ.(type) {
case *types.Basic:
if t == Void {
return types.Typ[types.UnsafePointer]
}
case *types.Signature:
if gogen.IsCSignature(t) {
return types.NewSignatureType(nil, nil, nil, t.Params(), t.Results(), t.Variadic())
}
case *types.Named:
if typ == ValistTag {
return Valist
}
}
return types.NewPointer(typ)
}
func IsFunc(typ types.Type) bool {
sig, ok := typ.(*types.Signature)
if ok {
ok = gogen.IsCSignature(sig)
}
return ok
}
func Identical(typ1, typ2 types.Type) bool {
return types.Identical(typ1, typ2)
}
// -----------------------------------------------------------------------------