// nilLiteral returns a nil literal of the specified type, which may
// be any reference type, including interfaces.
//
func nilLiteral(typ types.Type) *Literal {
return newLiteral(exact.MakeNil(), typ)
}
// nilConst returns a nil constant of the specified type, which may
// be any reference type, including interfaces.
//
func nilConst(typ types.Type) *Const {
return NewConst(exact.MakeNil(), typ)
}
sig := &Signature{results: NewTuple(res)}
err := NewFunc(token.NoPos, nil, "Error", sig)
typ := &Named{underlying: &Interface{methods: []*Func{err}}, complete: true}
sig.recv = NewVar(token.NoPos, nil, "", typ)
def(NewTypeName(token.NoPos, nil, "error", typ))
}
var predeclaredConsts = [...]struct {
name string
kind BasicKind
val exact.Value
}{
{"true", UntypedBool, exact.MakeBool(true)},
{"false", UntypedBool, exact.MakeBool(false)},
{"iota", UntypedInt, exact.MakeInt64(0)},
{"nil", UntypedNil, exact.MakeNil()},
}
func defPredeclaredConsts() {
for _, c := range predeclaredConsts {
def(NewConst(token.NoPos, nil, c.name, Typ[c.kind], c.val))
}
}
// A builtinId is the id of a builtin function.
type builtinId int
const (
// universe scope
_Append builtinId = iota
_Cap