lean2/src/util/rb_map.cpp

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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/lua.h"
#include "util/luaref.h"
#include "util/rb_map.h"
namespace lean {
typedef rb_map<luaref, luaref, luaref_lt_proc> lua_rb_map;
DECL_UDATA(lua_rb_map)
static int mk_lua_rb_map(lua_State * L) {
lua_rb_map r;
return push_lua_rb_map(L, r);
}
static int lua_rb_map_size(lua_State * L) {
lua_pushinteger(L, to_lua_rb_map(L, 1).size());
return 1;
}
static int lua_rb_map_contains(lua_State * L) {
lua_pushboolean(L, to_lua_rb_map(L, 1).contains(luaref(L, 2)));
return 1;
}
static int lua_rb_map_empty(lua_State * L) {
lua_pushboolean(L, to_lua_rb_map(L, 1).empty());
return 1;
}
static int lua_rb_map_insert(lua_State * L) {
to_lua_rb_map(L, 1).insert(luaref(L, 2), luaref(L, 3));
return 0;
}
static int lua_rb_map_erase(lua_State * L) {
to_lua_rb_map(L, 1).erase(luaref(L, 2));
return 0;
}
static int lua_rb_map_find(lua_State * L) {
lua_rb_map & m = to_lua_rb_map(L, 1);
luaref const * val = m.find(luaref(L, 2));
if (val) {
lean_assert(val->get_state() == L);
val->push();
} else {
lua_pushnil(L);
}
return 1;
}
static int lua_rb_map_copy(lua_State * L) {
return push_lua_rb_map(L, to_lua_rb_map(L, 1));
}
static int lua_rb_map_for_each(lua_State * L) {
// Remark: we take a copy of the map to make sure
// for_each will not crash if the map is updated while being
// traversed.
// The copy operation is very cheap O(1).
lua_rb_map m(to_lua_rb_map(L, 1)); // map
luaL_checktype(L, 2, LUA_TFUNCTION); // user-fun
m.for_each([&](luaref const & k, luaref const & v) {
lua_pushvalue(L, 2); // push user-fun
k.push();
v.push();
pcall(L, 2, 0, 0);
});
return 0;
}
static const struct luaL_Reg lua_rb_map_m[] = {
{"__gc", lua_rb_map_gc}, // never throws
{"__len", safe_function<lua_rb_map_size> },
{"contains", safe_function<lua_rb_map_contains>},
{"size", safe_function<lua_rb_map_size>},
{"empty", safe_function<lua_rb_map_empty>},
{"insert", safe_function<lua_rb_map_insert>},
{"erase", safe_function<lua_rb_map_erase>},
{"find", safe_function<lua_rb_map_find>},
{"copy", safe_function<lua_rb_map_copy>},
{"for_each", safe_function<lua_rb_map_for_each>},
{0, 0}
};
void open_rb_map(lua_State * L) {
luaL_newmetatable(L, lua_rb_map_mt);
lua_pushvalue(L, -1);
lua_setfield(L, -2, "__index");
setfuncs(L, lua_rb_map_m, 0);
SET_GLOBAL_FUN(mk_lua_rb_map, "rb_map");
SET_GLOBAL_FUN(lua_rb_map_pred, "is_rb_map");
}
}