lean2/src/library/deep_copy.cpp
Leonardo de Moura d69db172a1 chore(kernel/replace_fn): add syntax sugar for replace function
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-07-19 12:53:37 +01:00

37 lines
1.4 KiB
C++

/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include "util/buffer.h"
#include "kernel/expr.h"
#include "kernel/replace_fn.h"
namespace lean {
expr copy(expr const & a) {
scoped_expr_caching scope(false);
switch (a.kind()) {
case expr_kind::Var: return mk_var(var_idx(a));
case expr_kind::Constant: return mk_constant(const_name(a), const_levels(a));
case expr_kind::Sort: return mk_sort(sort_level(a));
case expr_kind::Macro: return mk_macro(to_macro(a)->m_definition, macro_num_args(a), macro_args(a));
case expr_kind::App: return mk_app(app_fn(a), app_arg(a));
case expr_kind::Lambda: return mk_lambda(binding_name(a), binding_domain(a), binding_body(a), binding_info(a));
case expr_kind::Pi: return mk_pi(binding_name(a), binding_domain(a), binding_body(a), binding_info(a));
case expr_kind::Meta: return mk_metavar(mlocal_name(a), mlocal_type(a));
case expr_kind::Local: return mk_local(mlocal_name(a), local_pp_name(a), mlocal_type(a), local_info(a));
}
lean_unreachable(); // LCOV_EXCL_LINE
}
expr deep_copy(expr const & e) {
scoped_expr_caching scope(false);
return replace(e, [](expr const & e) {
if (is_atomic(e))
return some_expr(copy(e));
else
return none_expr();
});
}
}