go/src/cmd/compile/internal/types2/alias.go

type Alias …

// NewAlias creates a new Alias type with the given type name and rhs.
// rhs must not be nil.
func NewAlias(obj *TypeName, rhs Type) *Alias { … }

// Obj returns the type name for the declaration defining the alias type a.
// For instantiated types, this is same as the type name of the origin type.
func (a *Alias) Obj() *TypeName { … }

func (a *Alias) String() string { … }

// Underlying returns the [underlying type] of the alias type a, which is the
// underlying type of the aliased type. Underlying types are never Named,
// TypeParam, or Alias types.
//
// [underlying type]: https://go.dev/ref/spec#Underlying_types.
func (a *Alias) Underlying() Type { … }

// Origin returns the generic Alias type of which a is an instance.
// If a is not an instance of a generic alias, Origin returns a.
func (a *Alias) Origin() *Alias { … }

// TypeParams returns the type parameters of the alias type a, or nil.
// A generic Alias and its instances have the same type parameters.
func (a *Alias) TypeParams() *TypeParamList { … }

// SetTypeParams sets the type parameters of the alias type a.
// The alias a must not have type arguments.
func (a *Alias) SetTypeParams(tparams []*TypeParam) { … }

// TypeArgs returns the type arguments used to instantiate the Alias type.
// If a is not an instance of a generic alias, the result is nil.
func (a *Alias) TypeArgs() *TypeList { … }

// Rhs returns the type R on the right-hand side of an alias
// declaration "type A = R", which may be another alias.
func (a *Alias) Rhs() Type { … }

// Unalias returns t if it is not an alias type;
// otherwise it follows t's alias chain until it
// reaches a non-alias type which is then returned.
// Consequently, the result is never an alias type.
func Unalias(t Type) Type { … }

func unalias(a0 *Alias) Type { … }

// asNamed returns t as *Named if that is t's
// actual type. It returns nil otherwise.
func asNamed(t Type) *Named { … }

// newAlias creates a new Alias type with the given type name and rhs.
// rhs must not be nil.
func (check *Checker) newAlias(obj *TypeName, rhs Type) *Alias { … }

// newAliasInstance creates a new alias instance for the given origin and type
// arguments, recording pos as the position of its synthetic object (for error
// reporting).
func (check *Checker) newAliasInstance(pos syntax.Pos, orig *Alias, targs []Type, expanding *Named, ctxt *Context) *Alias { … }

func (a *Alias) cleanup() { … }