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go/types: move NewTypeParam off of Checker

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This aligns with the API proposal.

Change-Id: I9967a317196392ffa5ddbe5391d7aba5f6e7bad2
Reviewed-on: https://go-review.googlesource.com/c/go/+/347561
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Robert Findley 2021-09-03 11:22:18 -04:00
parent cb9ccd494b
commit 38c2e08cbd
4 changed files with 10 additions and 6 deletions
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2
src/go/internal/gcimporter/iimport.go
View file

@ -355,7 +355,7 @@ func (r *importReader) obj(name string) {
}
name0, sub := parseSubscript(name)
tn := types.NewTypeName(pos, r.currPkg, name0, nil)
t := (*types.Checker)(nil).NewTypeParam(tn, nil)
t := types.NewTypeParam(tn, nil)
if sub == 0 {
errorf("missing subscript")
}

2
src/go/types/builtins.go
View file

@ -830,7 +830,7 @@ func (check *Checker) applyTypeFunc(f func(Type) Type, x Type) Type {
// type param is placed in the current package so export/import
// works as expected.
tpar := NewTypeName(token.NoPos, check.pkg, "<type parameter>", nil)
ptyp := check.NewTypeParam(tpar, NewInterfaceType(nil, []Type{NewUnion(terms)})) // assigns type to tpar as a side-effect
ptyp := check.newTypeParam(tpar, NewInterfaceType(nil, []Type{NewUnion(terms)})) // assigns type to tpar as a side-effect
ptyp.index = tp.index
return ptyp

2
src/go/types/decl.go
View file

@ -677,7 +677,7 @@ func (check *Checker) collectTypeParams(list *ast.FieldList) *TParamList {
func (check *Checker) declareTypeParams(tparams []*TypeParam, names []*ast.Ident) []*TypeParam {
for _, name := range names {
tname := NewTypeName(name.Pos(), check.pkg, name.Name, nil)
tpar := check.NewTypeParam(tname, &emptyInterface) // assigns type to tpar as a side-effect
tpar := check.newTypeParam(tname, &emptyInterface) // assigns type to tpar as a side-effect
check.declare(check.scope, name, tname, check.scope.pos) // TODO(gri) check scope position
tparams = append(tparams, tpar)
}

10
src/go/types/typeparam.go
View file

@ -32,15 +32,19 @@ type TypeParam struct {
// or Signature type by calling SetTParams. Setting a type parameter on more
// than one type will result in a panic.
//
// The bound argument can be nil, and set later via SetBound.
func (check *Checker) NewTypeParam(obj *TypeName, bound Type) *TypeParam {
// The bound argument can be nil, and set later via SetConstraint.
func NewTypeParam(obj *TypeName, constraint Type) *TypeParam {
return (*Checker)(nil).newTypeParam(obj, constraint)
}
func (check *Checker) newTypeParam(obj *TypeName, constraint Type) *TypeParam {
// Always increment lastID, even if it is not used.
id := nextID()
if check != nil {
check.nextID++
id = check.nextID
}
typ := &TypeParam{check: check, id: id, obj: obj, index: -1, bound: bound}
typ := &TypeParam{check: check, id: id, obj: obj, index: -1, bound: constraint}
if obj.typ == nil {
obj.typ = typ
}