spec := &ast.ValueSpec{doc, idents, typ, values, p.lineComment}
	p.declare(spec, p.topScope, ast.Var, idents...)

	return spec
}

func (p *parser) parseGenDecl(keyword token.Token, f parseSpecFunction) *ast.GenDecl {
	if p.trace {
		defer un(trace(p, "GenDecl("+keyword.String()+")"))
	}

	doc := p.leadComment
	pos := p.expect(keyword)

		return isTypeElem(x.X) || isTypeElem(x.Y)
	case *ast.UnaryExpr:
		return x.Op == token.TILDE
	case *ast.ParenExpr:
		return isTypeElem(x.X)
	}
	return false
}

func (p *parser) parseGenDecl(keyword token.Token, f parseSpecFunction) *ast.GenDecl {
	if p.trace {
		defer un(trace(p, "GenDecl("+keyword.String()+")"))
	}

	doc := p.leadComment
	pos := p.expect(keyword)