diff --git a/src/frontends/lean/parser.cpp b/src/frontends/lean/parser.cpp index f5478405f..ff51bb9db 100644 --- a/src/frontends/lean/parser.cpp +++ b/src/frontends/lean/parser.cpp @@ -1434,7 +1434,8 @@ bool parser::parse_commands() { throw_parser_exception("invalid end of module, expecting 'end'", pos()); } } catch (interrupt_parser) { - display_error("parser has been interrupted", m_last_cmd_pos); + while (has_open_scopes(m_env)) + m_env = pop_scope_core(m_env); } commit_info(m_scanner.get_line()+1); for (certified_declaration const & thm : m_theorem_queue.join()) { diff --git a/src/library/scoped_ext.cpp b/src/library/scoped_ext.cpp index 856e3d5d9..c2d710065 100644 --- a/src/library/scoped_ext.cpp +++ b/src/library/scoped_ext.cpp @@ -147,13 +147,10 @@ static void namespace_reader(deserializer & d, module_idx, shared_environment &, }); } -environment pop_scope(environment const & env, name const & n) { +environment pop_scope_core(environment const & env) { scope_mng_ext ext = get_extension(env); if (is_nil(ext.m_namespaces)) - throw exception("invalid end of scope, there are no open namespaces/sections/contexts"); - if (n != head(ext.m_headers)) - throw exception(sstream() << "invalid end of scope, begin/end mistmatch, scope starts with '" - << head(ext.m_headers) << "', and ends with '" << n << "'"); + return env; scope_kind k = head(ext.m_scope_kinds); ext.m_namespaces = tail(ext.m_namespaces); ext.m_headers = tail(ext.m_headers); @@ -165,6 +162,16 @@ environment pop_scope(environment const & env, name const & n) { return r; } +environment pop_scope(environment const & env, name const & n) { + scope_mng_ext ext = get_extension(env); + if (is_nil(ext.m_namespaces)) + throw exception("invalid end of scope, there are no open namespaces/sections/contexts"); + if (n != head(ext.m_headers)) + throw exception(sstream() << "invalid end of scope, begin/end mistmatch, scope starts with '" + << head(ext.m_headers) << "', and ends with '" << n << "'"); + return pop_scope_core(env); +} + bool has_open_scopes(environment const & env) { scope_mng_ext ext = get_extension(env); return !is_nil(ext.m_namespaces); diff --git a/src/library/scoped_ext.h b/src/library/scoped_ext.h index 1bf6c2ea0..ad000eb22 100644 --- a/src/library/scoped_ext.h +++ b/src/library/scoped_ext.h @@ -31,8 +31,15 @@ environment export_namespace(environment const & env, io_state const & ios, name /** \brief Create a new scope, all scoped extensions are notified. */ environment push_scope(environment const & env, io_state const & ios, scope_kind k, name const & n = name()); -/** \brief Delete the most recent scope, all scoped extensions are notified. */ +/** \brief Delete the most recent scope, all scoped extensions are notified. + \remark method throws an exception if there are no open scopes, or \c n does not match the name of the open scope +*/ environment pop_scope(environment const & env, name const & n = name()); +/** \brief Similar to \c pop_scope, but it always succeed. + It always pops the current open scope, and does nothing if there are no open scope. +*/ +environment pop_scope_core(environment const & env); +/** \brief Return true iff there are open scopes */ bool has_open_scopes(environment const & env); /** \brief Add a new namespace (if it does not exist) */