2014-06-11 00:02:06 +00:00
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/*
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Copyright (c) 2014 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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2014-06-13 18:24:26 +00:00
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#include "util/sstream.h"
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2014-06-11 18:52:58 +00:00
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#include "library/io_state_stream.h"
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2014-06-13 18:24:26 +00:00
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#include "library/scoped_ext.h"
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#include "library/aliases.h"
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2014-06-11 18:44:16 +00:00
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#include "frontends/lean/parser.h"
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2014-06-11 00:02:06 +00:00
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namespace lean {
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2014-06-12 03:56:10 +00:00
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static name g_raw("raw");
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2014-06-13 18:24:26 +00:00
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static void check_atomic(name const & n) {
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if (!n.is_atomic())
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throw exception(sstream() << "invalid declaration name '" << n << "', identifier must be atomic");
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}
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2014-06-12 16:08:38 +00:00
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environment universe_cmd(parser & p) {
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if (p.curr_is_identifier()) {
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name n = p.get_name_val();
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2014-06-13 18:24:26 +00:00
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check_atomic(n);
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2014-06-12 16:08:38 +00:00
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p.next();
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2014-06-13 18:24:26 +00:00
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environment env = p.env();
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if (in_section(env)) {
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p.add_local_level(n, mk_param_univ(n));
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} else {
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name const & ns = get_namespace(env);
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name full_n = ns + n;
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env = env.add_universe(full_n);
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if (!ns.is_anonymous())
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env = add_alias(env, n, mk_global_univ(full_n));
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}
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return env;
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2014-06-12 16:08:38 +00:00
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} else {
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throw parser_error("invalid universe declaration, identifier expected", p.cmd_pos());
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}
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}
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2014-06-11 18:52:58 +00:00
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environment print_cmd(parser & p) {
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if (p.curr() == scanner::token_kind::String) {
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2014-06-12 03:56:10 +00:00
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p.regular_stream() << p.get_str_val() << "\n";
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2014-06-11 18:52:58 +00:00
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p.next();
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2014-06-12 03:56:10 +00:00
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} else if (p.curr_is_token(g_raw)) {
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p.next();
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expr e = p.parse_expr();
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p.regular_stream() << e << "\n";
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2014-06-11 18:52:58 +00:00
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} else {
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throw parser_error("invalid print command", p.pos());
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}
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return p.env();
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}
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2014-06-13 18:24:26 +00:00
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environment section_cmd(parser & p) {
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p.push_local_scope();
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return push_scope(p.env(), p.ios());
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}
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environment namespace_cmd(parser & p) {
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if (p.curr_is_identifier()) {
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name n = p.get_name_val();
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check_atomic(n);
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p.next();
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return push_scope(p.env(), p.ios(), n);
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} else {
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throw parser_error("invalid namespace declaration, identifier expected", p.cmd_pos());
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}
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}
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environment end_scoped_cmd(parser & p) {
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if (in_section(p.env()))
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p.pop_local_scope();
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return pop_scope(p.env());
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}
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2014-06-11 18:52:58 +00:00
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cmd_table init_cmd_table() {
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cmd_table r;
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2014-06-13 18:24:26 +00:00
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add_cmd(r, cmd_info("print", "print a string", print_cmd));
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add_cmd(r, cmd_info("universe", "declare a global universe level", universe_cmd));
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add_cmd(r, cmd_info("section", "open a new section", section_cmd));
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add_cmd(r, cmd_info("namespace", "open a new namespace", namespace_cmd));
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add_cmd(r, cmd_info("end", "close the current namespace/section", end_scoped_cmd));
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2014-06-11 18:52:58 +00:00
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return r;
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}
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2014-06-11 00:02:06 +00:00
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cmd_table get_builtin_cmds() {
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2014-06-11 18:52:58 +00:00
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static optional<cmd_table> r;
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if (!r)
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r = init_cmd_table();
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return *r;
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2014-06-11 00:02:06 +00:00
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}
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}
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