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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package types
import (
"cmd/compile/internal/base"
"cmd/internal/src"
)
var basicTypes = [...]struct {
name string
etype Kind
}{
{"int8", TINT8},
{"int16", TINT16},
{"int32", TINT32},
{"int64", TINT64},
{"uint8", TUINT8},
{"uint16", TUINT16},
{"uint32", TUINT32},
{"uint64", TUINT64},
{"float32", TFLOAT32},
{"float64", TFLOAT64},
{"complex64", TCOMPLEX64},
{"complex128", TCOMPLEX128},
{"bool", TBOOL},
{"string", TSTRING},
}
var typedefs = [...]struct {
name string
etype Kind
sameas32 Kind
sameas64 Kind
}{
{"int", TINT, TINT32, TINT64},
{"uint", TUINT, TUINT32, TUINT64},
{"uintptr", TUINTPTR, TUINT32, TUINT64},
}
func InitTypes(defTypeName func(sym *Sym, typ *Type) Object) {
if PtrSize == 0 {
base.Fatalf("InitTypes called before PtrSize was set")
}
SlicePtrOffset = 0
SliceLenOffset = RoundUp(SlicePtrOffset+int64(PtrSize), int64(PtrSize))
SliceCapOffset = RoundUp(SliceLenOffset+int64(PtrSize), int64(PtrSize))
SliceSize = RoundUp(SliceCapOffset+int64(PtrSize), int64(PtrSize))
// string is same as slice wo the cap
StringSize = RoundUp(SliceLenOffset+int64(PtrSize), int64(PtrSize))
for et := Kind(0); et < NTYPE; et++ {
SimType[et] = et
}
Types[TANY] = newType(TANY) // note: an old placeholder type, NOT the new builtin 'any' alias for interface{}
Types[TINTER] = NewInterface(nil)
CheckSize(Types[TINTER])
defBasic := func(kind Kind, pkg *Pkg, name string) *Type {
typ := newType(kind)
obj := defTypeName(pkg.Lookup(name), typ)
typ.obj = obj
if kind != TANY {
CheckSize(typ)
}
return typ
}
for _, s := range &basicTypes {
Types[s.etype] = defBasic(s.etype, BuiltinPkg, s.name)
}
for _, s := range &typedefs {
sameas := s.sameas32
if PtrSize == 8 {
sameas = s.sameas64
}
SimType[s.etype] = sameas
Types[s.etype] = defBasic(s.etype, BuiltinPkg, s.name)
}
// We create separate byte and rune types for better error messages
// rather than just creating type alias *Sym's for the uint8 and
// int32 Hence, (bytetype|runtype).Sym.isAlias() is false.
// TODO(gri) Should we get rid of this special case (at the cost
// of less informative error messages involving bytes and runes)?
// NOTE(rsc): No, the error message quality is important.
// (Alternatively, we could introduce an OTALIAS node representing
// type aliases, albeit at the cost of having to deal with it everywhere).
ByteType = defBasic(TUINT8, BuiltinPkg, "byte")
RuneType = defBasic(TINT32, BuiltinPkg, "rune")
// error type
DeferCheckSize()
ErrorType = defBasic(TFORW, BuiltinPkg, "error")
ErrorType.SetUnderlying(makeErrorInterface())
ResumeCheckSize()
// comparable type (interface)
DeferCheckSize()
ComparableType = defBasic(TFORW, BuiltinPkg, "comparable")
ComparableType.SetUnderlying(makeComparableInterface())
ResumeCheckSize()
// any type (interface)
DeferCheckSize()
AnyType = defBasic(TFORW, BuiltinPkg, "any")
AnyType.SetUnderlying(NewInterface(nil))
ResumeCheckSize()
Types[TUNSAFEPTR] = defBasic(TUNSAFEPTR, UnsafePkg, "Pointer")
Types[TBLANK] = newType(TBLANK)
Types[TNIL] = newType(TNIL)
// simple aliases
SimType[TMAP] = TPTR
SimType[TCHAN] = TPTR
SimType[TFUNC] = TPTR
SimType[TUNSAFEPTR] = TPTR
for et := TINT8; et <= TUINT64; et++ {
IsInt[et] = true
}
IsInt[TINT] = true
IsInt[TUINT] = true
IsInt[TUINTPTR] = true
IsFloat[TFLOAT32] = true
IsFloat[TFLOAT64] = true
IsComplex[TCOMPLEX64] = true
IsComplex[TCOMPLEX128] = true
}
func makeErrorInterface() *Type {
sig := NewSignature(FakeRecv(), nil, []*Field{
NewField(src.NoXPos, nil, Types[TSTRING]),
})
method := NewField(src.NoXPos, LocalPkg.Lookup("Error"), sig)
return NewInterface([]*Field{method})
}
// makeComparableInterface makes the predefined "comparable" interface in the
// built-in package. It has a unique name, but no methods.
func makeComparableInterface() *Type {
return NewInterface(nil)
}