lean2/src/frontends/lean/util.cpp
Leonardo de Moura da4c1922e3 feat(frontends/lean): add '_root_' prefix for referencing names in the root namespace
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
2014-07-07 19:15:46 -07:00

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/*
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Author: Leonardo de Moura
*/
#include "util/sstream.h"
#include "library/scoped_ext.h"
#include "frontends/lean/parser.h"
namespace lean {
void check_atomic(name const & n) {
if (!n.is_atomic())
throw exception(sstream() << "invalid declaration name '" << n << "', identifier must be atomic");
}
void check_in_section(parser const & p) {
if (!in_section(p.env()))
throw exception(sstream() << "invalid command, it must be used in a section");
}
static name g_root("_root_");
bool is_root_namespace(name const & n) {
return n == g_root;
}
name remove_root_prefix(name const & n) {
return n.replace_prefix(g_root, name());
}
}