Method stringy

compiler/semantic/expr.go:657–661

(loc ast.Node, typ super.Type)

}

func (t *translator) stringy(loc ast.Node, typ super.Type) {
	if !hasString(typ) {
		t.error(loc, errors.New("expected type string"))
	}
}

func (t *translator) isIndexOfThis(lhs, rhs sem.Expr) *sem.ThisExpr {
	if this, ok := lhs.(*sem.ThisExpr); ok {