refactor(builtin): only load the kernel and natural numbers by default

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

examples/lean/ex4.lean

@@ -1,4 +1,5 @@
 Import tactic
+Import int
 Definition a : Nat := 10
 (* Trivial indicates a "proof by evaluation" *)
 Theorem T1 : a > 0 := (by trivial)

src/builtin/CMakeLists.txt

@@ -68,9 +68,9 @@ endfunction()
 
 add_kernel_theory("kernel.lean"    "${CMAKE_CURRENT_BINARY_DIR}/macros.lua")
 add_kernel_theory("nat.lean"       "${CMAKE_CURRENT_BINARY_DIR}/kernel.olean")
-add_kernel_theory("int.lean"       "${CMAKE_CURRENT_BINARY_DIR}/nat.olean")
-add_kernel_theory("real.lean"      "${CMAKE_CURRENT_BINARY_DIR}/int.olean")
 
+add_theory("int.lean"       "${CMAKE_CURRENT_BINARY_DIR}/nat.olean")
+add_theory("real.lean"      "${CMAKE_CURRENT_BINARY_DIR}/int.olean")
 add_theory("specialfn.lean" "${CMAKE_CURRENT_BINARY_DIR}/real.olean")
 add_theory("cast.lean"      "${CMAKE_CURRENT_BINARY_DIR}/kernel.olean")
 

src/frontends/lean/frontend.cpp

@@ -21,7 +21,9 @@ Author: Leonardo de Moura
 #include "kernel/io_state.h"
 #include "library/expr_pair.h"
 #include "library/expr_pair_maps.h"
-#include "library/all/all.h"
+#include "library/arith/nat.h"
+#include "library/arith/int.h"
+#include "library/arith/real.h"
 #include "frontends/lean/operator_info.h"
 #include "frontends/lean/coercion.h"
 #include "frontends/lean/frontend.h"
@@ -554,17 +556,21 @@ static lean_extension & to_ext(environment const & env) {
     return env->get_extension<lean_extension>(g_lean_extension_initializer.m_extid);
 }
 
-/**
-   \brief Import all definitions and notation.
-*/
 void init_frontend(environment const & env, io_state & ios, bool no_kernel) {
     ios.set_formatter(mk_pp_formatter(env));
-    if (!no_kernel)
+    if (!no_kernel) {
-        import_all(env);
+        import_kernel(env);
+        import_nat(env);
+    }
 }
-void init_frontend(environment const & env) {
+void init_full_frontend(environment const & env, io_state & ios) {
-    io_state ios;
     init_frontend(env, ios);
+    import_int(env);
+    import_real(env);
+}
+void init_full_frontend(environment const & env) {
+    io_state ios;
+    init_full_frontend(env, ios);
 }
 
 void add_infix(environment const & env, io_state const & ios, name const & opn, unsigned p, expr const & d)  {

src/frontends/lean/frontend.h

@@ -14,10 +14,16 @@ Author: Leonardo de Moura
 
 namespace lean {
 /**
-   \brief Import all definitions and notation.
+   \brief Load kernel, nat and set pretty printer.
 */
 void init_frontend(environment const & env, io_state & ios, bool no_kernel = false);
-void init_frontend(environment const & env);
+
+/*
+  \brief Load kernel, nat, int, real and set pretty printer.
+  It is used for testing.
+*/
+void init_full_frontend(environment const & env, io_state & ios);
+void init_full_frontend(environment const & env);
 
 /**
    @name Notation for parsing and pretty printing.

src/library/kernel_bindings.cpp

@@ -1139,6 +1139,24 @@ static int environment_is_opaque(lua_State * L) {
     return 1;
 }
 
+static int environment_import(lua_State * L) {
+    rw_shared_environment env(L, 1);
+    int nargs = lua_gettop(L);
+    if (nargs == 3) {
+        env->import(luaL_checkstring(L, 2), to_io_state(L, 3));
+    } else {
+        io_state * ios = get_io_state(L);
+        if (ios) {
+            env->import(luaL_checkstring(L, 2), *ios);
+        } else {
+            io_state ios;
+            ios.set_options(get_global_options(L));
+            env->import(luaL_checkstring(L, 2), ios);
+        }
+    }
+    return 0;
+}
+
 static const struct luaL_Reg environment_m[] = {
     {"__gc",           environment_gc}, // never throws
     {"__tostring",     safe_function<environment_tostring>},
@@ -1162,6 +1180,7 @@ static const struct luaL_Reg environment_m[] = {
     {"local_objects",  safe_function<environment_local_objects>},
     {"set_opaque",     safe_function<environment_set_opaque>},
     {"is_opaque",      safe_function<environment_is_opaque>},
+    {"import",         safe_function<environment_import>},
     {0, 0}
 };
 

src/tests/frontends/lean/parser.cpp

@@ -42,7 +42,7 @@ static void parse_error(environment const & env, io_state const & ios, char cons
 }
 
 static void tst1() {
-    environment env; io_state ios; init_frontend(env, ios);
+    environment env; io_state ios; init_full_frontend(env, ios);
     parse(env, ios, "Variable x : Bool Variable y : Bool Axiom H : x && y || x => x");
     parse(env, ios, "Eval true && true");
     parse(env, ios, "Show true && false Eval true && false");
@@ -63,7 +63,7 @@ static void check(environment const & env, io_state & ios, char const * str, exp
 }
 
 static void tst2() {
-    environment env; io_state ios; init_frontend(env, ios);
+    environment env; io_state ios; init_full_frontend(env, ios);
     env->add_var("x", Bool);
     env->add_var("y", Bool);
     env->add_var("z", Bool);
@@ -80,7 +80,7 @@ static void tst2() {
 }
 
 static void tst3() {
-    environment env; io_state ios; init_frontend(env, ios);
+    environment env; io_state ios; init_full_frontend(env, ios);
     parse(env, ios, "Help");
     parse(env, ios, "Help Options");
     parse_error(env, ios, "Help Echo");

src/tests/kernel/environment.cpp

@@ -63,7 +63,7 @@ static void tst2() {
 
 static void tst3() {
     std::cout << "tst3\n";
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     try {
         env->add_definition("a", Int, Const("a"));
         lean_unreachable();
@@ -108,7 +108,7 @@ static void tst3() {
 
 static void tst4() {
     std::cout << "tst4\n";
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_definition("a", Int, iVal(1), true); // add opaque definition
     expr t = iAdd(Const("a"), iVal(1));
     std::cout << t << " --> " << normalize(t, env) << "\n";
@@ -121,7 +121,7 @@ static void tst4() {
 }
 
 static void tst5() {
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_definition("a", Int, iVal(1), true); // add opaque definition
     try {
         std::cout << type_check(iAdd(Const("a"), Int), env) << "\n";
@@ -132,7 +132,7 @@ static void tst5() {
 }
 
 static void tst6() {
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     level u = env->add_uvar("u", level() + 1);
     level w = env->add_uvar("w", u + 1);
     env->add_var("f", mk_arrow(Type(u), Type(u)));
@@ -159,7 +159,7 @@ static void tst6() {
 }
 
 static void tst7() {
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Int);
     env->add_var("b", Int);
     expr t = If(Int, True, Const("a"), Const("b"));
@@ -207,7 +207,7 @@ static void tst9() {
 
 static void tst10() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_definition("a", Int, iVal(1));
     lean_assert(env->get_object("a").get_weight() == 1);
     expr a = Const("a");

src/tests/kernel/metavar.cpp

@@ -546,7 +546,7 @@ static void tst26() {
     */
     std::cout << "\ntst26\n";
     environment  env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> up;
     type_checker checker(env);
@@ -588,7 +588,7 @@ static void tst27() {
     */
     std::cout << "\ntst27\n";
     environment  env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> up;
     type_checker checker(env);

src/tests/kernel/normalizer.cpp

@@ -191,7 +191,7 @@ static void tst2() {
 
 static void tst3() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("a", Bool);
     expr t1 = Const("a");
     expr t2 = Const("a");
@@ -219,7 +219,7 @@ static void tst5() {
 #if !defined(__APPLE__) && defined(LEAN_MULTI_THREAD)
     expr t = mk_big(18);
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("f", Bool >> (Bool >> Bool));
     env->add_var("a", Bool);
     normalizer proc(env);
@@ -255,7 +255,7 @@ static void tst6() {
 
 static void tst7() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr m1 = menv->mk_metavar();
     expr x  = Const("x");
@@ -279,7 +279,7 @@ static void tst7() {
 
 static void tst8() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("P", Int >> (Int >> Bool));
     expr P = Const("P");
     expr v0 = Var(0);
@@ -307,7 +307,7 @@ static void tst9() {
 
 static void tst10() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     context ctx({{"x", Bool}, {"y", Bool}});
     expr m  = menv->mk_metavar(ctx);

src/tests/kernel/threads.cpp

@@ -26,7 +26,7 @@ expr norm(expr const & e, environment & env) {
 }
 
 static void mk(expr const & a) {
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     expr b = Const("b");
     for (unsigned i = 0; i < 100; i++) {
         expr h = Const("h");

src/tests/kernel/type_checker.cpp

@@ -78,7 +78,7 @@ static void tst2() {
 
 static void tst3() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr f = Fun("a", Bool, Eq(Const("a"), True));
     std::cout << type_check(f, env) << "\n";
     lean_assert(type_check(f, env) == mk_arrow(Bool, Bool));
@@ -88,7 +88,7 @@ static void tst3() {
 
 static void tst4() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr a = Eq(iVal(1), iVal(2));
     expr pr   = mk_lambda("x", a, Var(0));
     std::cout << type_check(pr, env) << "\n";
@@ -96,7 +96,7 @@ static void tst4() {
 
 static void tst5() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("P", Bool);
     expr P = Const("P");
     expr H = Const("H");
@@ -114,7 +114,7 @@ static void tst5() {
 
 static void tst6() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const("A");
     expr f = Const("f");
     expr x = Const("x");
@@ -129,7 +129,7 @@ static void tst6() {
 
 static void tst7() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const(name{"foo", "bla", "bla", "foo"});
     expr f = Const("f");
     expr x = Const("x");
@@ -144,7 +144,7 @@ static void tst7() {
 
 static void tst8() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("P", mk_arrow(Int, mk_arrow(Int, Bool)));
     env->add_var("x", Int);
     expr P = Const("P");
@@ -164,7 +164,7 @@ static void tst8() {
 
 static void tst9() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("P", mk_arrow(Int, mk_arrow(Int, Bool)));
     env->add_var("x", Int);
     expr P = Const("P");
@@ -184,7 +184,7 @@ static void tst9() {
 
 static void tst10() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("f", mk_arrow(Int, Int));
     env->add_var("b", Int);
     expr f = Const("f");
@@ -201,7 +201,7 @@ static void tst10() {
 
 static void tst11() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("f", Int >> (Int >> Int));
     env->add_var("a", Int);
     unsigned n = 1000;
@@ -232,7 +232,7 @@ static void tst12() {
 #if !defined(__APPLE__) && defined(LEAN_MULTI_THREAD)
     expr t = mk_big(18);
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("f", Int >> (Int >> Int));
     env->add_var("a", Int);
     type_checker checker(env);
@@ -255,7 +255,7 @@ static void tst12() {
 
 static void tst13() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("f", Type() >> Type());
     expr f = Const("f");
     std::cout << type_check(f(Bool), env) << "\n";
@@ -264,7 +264,7 @@ static void tst13() {
 
 static void tst14() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr f = Const("f");
     expr a = Const("a");
     env->add_var("f", Int >> Int);
@@ -282,7 +282,7 @@ static void tst14() {
 
 static void tst15() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     context ctx1, ctx2;
     expr A = Const("A");
     expr vec1 = Const("vec1");
@@ -350,7 +350,7 @@ static void f2(type_checker & tc, expr const & F) {
 
 static void tst17() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     type_checker tc(env);
     expr A = Const("A");
     expr F;
@@ -374,7 +374,7 @@ static std::ostream & operator<<(std::ostream & out, buffer<unification_constrai
 
 static void tst18() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     type_inferer type_of(env);
     expr f = Const("f");
     expr g = Const("g");
@@ -406,7 +406,7 @@ static expr mk_big(unsigned val, unsigned depth) {
 
 static void tst19() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     type_inferer type_of(env);
     type_checker  type_of_slow(env);
     expr t = mk_big(0, 10);
@@ -428,7 +428,7 @@ static void tst19() {
 
 static void tst20() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     context ctx1, ctx2;
     expr A = Const("A");
     expr vec1 = Const("vec1");
@@ -456,7 +456,7 @@ static void tst20() {
 
 static void tst21() {
     environment  env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> uc;
     type_inferer inferer(env);

src/tests/library/arith.cpp

@@ -16,7 +16,7 @@ using namespace lean;
 
 static void tst0() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     normalizer  norm(env);
     env->add_var("n", Nat);
     expr n = Const("n");
@@ -47,7 +47,7 @@ static void tst0() {
 
 static void tst1() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr e = mk_int_value(mpz(10));
     lean_assert(is_int_value(e));
     lean_assert(type_check(e, env) == Int);
@@ -56,7 +56,7 @@ static void tst1() {
 
 static void tst2() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr e = iAdd(iVal(10), iVal(30));
     std::cout << e << "\n";
     std::cout << normalize(e, env) << "\n";
@@ -73,7 +73,7 @@ static void tst2() {
 
 static void tst3() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr e = iMul(iVal(10), iVal(30));
     std::cout << e << "\n";
     std::cout << normalize(e, env) << "\n";
@@ -90,7 +90,7 @@ static void tst3() {
 
 static void tst4() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr e = iSub(iVal(10), iVal(30));
     std::cout << e << "\n";
     std::cout << normalize(e, env) << "\n";
@@ -107,7 +107,7 @@ static void tst4() {
 
 static void tst5() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var(name("a"), Int);
     expr e = Eq(iVal(3), iVal(4));
     std::cout << e << " --> " << normalize(e, env) << "\n";

src/tests/library/elaborator/elaborator.cpp

@@ -20,7 +20,7 @@ using namespace lean;
 
 static void tst1() {
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -75,7 +75,7 @@ static void tst2() {
          ?m4 in { Id, nat2int, nat2real }
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -116,7 +116,7 @@ static void tst3() {
         ?m5 in { Id, int2real }
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -158,7 +158,7 @@ static void tst4() {
            ?m6 in { Id, int2real }
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -202,7 +202,7 @@ static void tst5() {
            ?m4 in { Id, int2real }
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -239,7 +239,7 @@ static void tst6() {
       Theorem T : (f a (f b b)) == a := Subst _ _ _ _ H1 H2
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -307,7 +307,7 @@ static void unsolved(expr const & e, environment const & env) {
 static void tst7() {
     std::cout << "\nTST 7\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const("A");
     expr B = Const("B");
     expr F = Const("F");
@@ -328,7 +328,7 @@ static void tst7() {
 static void tst8() {
     std::cout << "\nTST 8\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr a  = Const("a");
     expr b  = Const("b");
     expr c  = Const("c");
@@ -354,7 +354,7 @@ static void tst8() {
 static void tst9() {
     std::cout << "\nTST 9\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr Nat = Const("N");
     env->add_var("N", Type());
     env->add_var("vec", Nat >> Type());
@@ -386,7 +386,7 @@ static void tst9() {
 static void tst10() {
     std::cout << "\nTST 10\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr Nat = Const("N");
     env->add_var("N", Type());
     expr R   = Const("R");
@@ -410,7 +410,7 @@ static void tst10() {
 static void tst11() {
     std::cout << "\nTST 11\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const("A");
     expr B = Const("B");
     expr a = Const("a");
@@ -428,7 +428,7 @@ static void tst11() {
 static void tst12() {
     std::cout << "\nTST 12\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr lst  = Const("list");
     expr nil  = Const("nil");
     expr cons = Const("cons");
@@ -449,7 +449,7 @@ static void tst12() {
 static void tst13() {
     std::cout << "\nTST 13\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr B = Const("B");
     expr A = Const("A");
     expr x = Const("x");
@@ -472,7 +472,7 @@ static void tst13() {
 static void tst14() {
     std::cout << "\nTST 14\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const("A");
     expr B = Const("B");
     expr f = Const("f");
@@ -513,7 +513,7 @@ static void tst14() {
 static void tst15() {
     std::cout << "\nTST 15\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A = Const("A");
     expr B = Const("B");
     expr C = Const("C");
@@ -539,7 +539,7 @@ static void tst15() {
 static void tst16() {
     std::cout << "\nTST 16\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr a  = Const("a");
     expr b  = Const("b");
     expr c  = Const("c");
@@ -560,7 +560,7 @@ static void tst16() {
                 EqTIntro(c, EqMP(a, c, Symm(Bool, c, a, Trans(Bool, c, b, a, Symm(Bool, b, c, H2), Symm(Bool, a, b, H1))), H3))),
             env);
     environment env2;
-    init_frontend(env2);
+    init_full_frontend(env2);
     success(Fun({{a, Bool}, {b, Bool}, {c, Bool}, {H1, Eq(a, b)}, {H2, Eq(b, c)}, {H3, a}},
                 EqTIntro(_, EqMP(_, _, Symm(_, _, _, Trans(_, _, _, _, Symm(_, _, _, H2), Symm(_, _, _, H1))), H3))),
             Fun({{a, Bool}, {b, Bool}, {c, Bool}, {H1, Eq(a, b)}, {H2, Eq(b, c)}, {H3, a}},
@@ -577,7 +577,7 @@ static void tst16() {
 void tst17() {
     std::cout << "\nTST 17\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A  = Const("A");
     expr B  = Const("B");
     expr a  = Const("a");
@@ -592,7 +592,7 @@ void tst17() {
 void tst18() {
     std::cout << "\nTST 18\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr A  = Const("A");
     expr h  = Const("h");
     expr f  = Const("f");
@@ -606,7 +606,7 @@ void tst18() {
 void tst19() {
     std::cout << "\nTST 19\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     expr R  = Const("R");
     expr A  = Const("A");
     expr r  = Const("r");
@@ -633,7 +633,7 @@ void tst19() {
 void tst20() {
     std::cout << "\nTST 20\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N1");
     expr M  = Const("M1");
@@ -666,7 +666,7 @@ void tst20() {
 void tst21() {
     std::cout << "\nTST 21\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N");
     expr M  = Const("M");
@@ -698,7 +698,7 @@ void tst21() {
 void tst22() {
     std::cout << "\nTST 22\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N");
     env->add_var("N", Type());
@@ -733,7 +733,7 @@ void tst22() {
 void tst23() {
     std::cout << "\nTST 23\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N");
     env->add_var("N", Type());
@@ -763,7 +763,7 @@ void tst23() {
 void tst24() {
     std::cout << "\nTST 24\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N");
     env->add_var("N", Type());
@@ -783,7 +783,7 @@ void tst24() {
 void tst25() {
     std::cout << "\nTST 25\n";
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     expr N  = Const("N");
     env->add_var("N", Type());
@@ -819,7 +819,7 @@ void tst26() {
       Axiom H : g _ a = a
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);
@@ -849,7 +849,7 @@ void tst27() {
       fun f : _, eq _ ((g _ f) a) a
     */
     environment env;
-    init_frontend(env);
+    init_full_frontend(env);
     metavar_env menv;
     buffer<unification_constraint> ucs;
     type_checker checker(env);

src/tests/library/rewriter/rewriter.cpp

@@ -38,7 +38,7 @@ static void theorem_rewriter1_tst() {
                                    Eq(nAdd(Const("x"), Const("y")), nAdd(Const("y"), Const("x")))));
     expr add_comm_thm_body = Const("ADD_COMM");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_var("b", Nat);
     env->add_axiom("ADD_COMM", add_comm_thm_type); // ADD_COMM : Pi (x, y: N), x + y = y + z
@@ -70,7 +70,7 @@ static void theorem_rewriter2_tst() {
                            Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_axiom("ADD_ID", add_id_thm_type); // ADD_ID : Pi (x : N), x = x + 0
 
@@ -108,7 +108,7 @@ static void then_rewriter1_tst() {
                            Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_axiom("ADD_COMM", add_comm_thm_type); // ADD_COMM : Pi (x, y: N), x + y = y + z
     env->add_axiom("ADD_ID", add_id_thm_type); // ADD_ID : Pi (x : N), x = x + 0
@@ -164,7 +164,7 @@ static void then_rewriter2_tst() {
                            Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_axiom("ADD_ASSOC", add_assoc_thm_type); // ADD_ASSOC : Pi (x, y, z : N), x + (y + z) = (x + y) + z
     env->add_axiom("ADD_COMM", add_comm_thm_type);   // ADD_COMM  : Pi (x, y: N), x + y = y + z
@@ -223,7 +223,7 @@ static void orelse_rewriter1_tst() {
                               Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_var("b", Nat);
     env->add_axiom("ADD_COMM", add_comm_thm_type); // ADD_COMM : Pi (x, y: N), x + y = y + z
@@ -270,7 +270,7 @@ static void orelse_rewriter2_tst() {
                               Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_var("b", Nat);
     env->add_axiom("ADD_ASSOC", add_assoc_thm_type);
@@ -319,7 +319,7 @@ static void try_rewriter1_tst() {
                               Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_var("b", Nat);
     env->add_axiom("ADD_COMM", add_comm_thm_type); // ADD_COMM : Pi (x, y: N), x + y = y + z
@@ -370,7 +370,7 @@ static void try_rewriter2_tst() {
                               Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_var("b", Nat);
     env->add_axiom("ADD_COMM", add_comm_thm_type); // ADD_COMM : Pi (x, y: N), x + y = y + z
@@ -416,7 +416,7 @@ static void app_rewriter1_tst() {
                                    Eq(nAdd(Const("x"), Const("y")), nAdd(Const("y"), Const("x")))));
     expr add_comm_thm_body = Const("ADD_COMM");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("f1", Nat >> Nat);
     env->add_var("f2", Nat >> (Nat >> Nat));
     env->add_var("f3", Nat >> (Nat >> (Nat >> Nat)));
@@ -506,7 +506,7 @@ static void repeat_rewriter1_tst() {
                            Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_axiom("ADD_ASSOC", add_assoc_thm_type); // ADD_ASSOC : Pi (x, y, z : N), x + (y + z) = (x + y) + z
     env->add_axiom("ADD_COMM", add_comm_thm_type);   // ADD_COMM  : Pi (x, y: N), x + y = y + z
@@ -564,7 +564,7 @@ static void repeat_rewriter2_tst() {
                            Eq(nAdd(Const("x"), zero), Const("x")));
     expr add_id_thm_body = Const("ADD_ID");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("a", Nat);
     env->add_axiom("ADD_ASSOC", add_assoc_thm_type); // ADD_ASSOC : Pi (x, y, z : N), x + (y + z) = (x + y) + z
     env->add_axiom("ADD_COMM", add_comm_thm_type);   // ADD_COMM  : Pi (x, y: N), x + y = y + z
@@ -611,7 +611,7 @@ static void depth_rewriter1_tst() {
                                    Eq(nAdd(Const("x"), Const("y")), nAdd(Const("y"), Const("x")))));
     expr add_comm_thm_body = Const("ADD_COMM");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("f1", Nat >> Nat);
     env->add_var("f2", Nat >> (Nat >> Nat));
     env->add_var("f3", Nat >> (Nat >> (Nat >> Nat)));
@@ -658,7 +658,7 @@ static void lambda_body_rewriter_tst() {
                                    Eq(nAdd(Const("x"), Const("y")), nAdd(Const("y"), Const("x")))));
     expr add_comm_thm_body = Const("ADD_COMM");
 
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     env->add_var("f1", Nat >> Nat);
     env->add_var("f2", Nat >> (Nat >> Nat));
     env->add_var("f3", Nat >> (Nat >> (Nat >> Nat)));
@@ -703,7 +703,7 @@ static void lambda_type_rewriter_tst() {
     // Result :     fun (x : vec(Nat, b + a)), x
     cout << "=== lambda_type_rewriter_tst() ===" << std::endl;
     context ctx;
-    environment env; init_frontend(env);
+    environment env; init_full_frontend(env);
     expr a = Const("a");   // a  : Nat
     env->add_var("a", Nat);
     expr b = Const("b");   // b  : Nat

src/tests/library/tactic/tactic.cpp

@@ -49,7 +49,7 @@ static void check_failure(tactic t, ro_environment const & env, io_state const &
 static void tst1() {
     environment env;
     io_state io(options(), mk_simple_formatter());
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("p", Bool);
     env->add_var("q", Bool);
     expr p = Const("p");
@@ -115,7 +115,7 @@ static void tst1() {
 static void tst2() {
     environment env;
     io_state io(options(), mk_simple_formatter());
-    init_frontend(env);
+    init_full_frontend(env);
     env->add_var("p", Bool);
     env->add_var("q", Bool);
     env->add_var("r", Bool);

tests/lean/abst.lean

@@ -1,3 +1,4 @@
+Import int.
 Axiom PlusComm(a b : Int) : a + b == b + a.
 Variable a : Int.
 Check (Abst (fun x : Int, (PlusComm a x))).

tests/lean/abst.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: PlusComm
   Assumed: a
 Abst (λ x : ℤ, PlusComm a x) : (λ x : ℤ, a + x) == (λ x : ℤ, x + a)

tests/lean/apply_tac1.lean

@@ -1,4 +1,5 @@
-(** import("tactic.lua") **)
+Import tactic.
+Import int.
 
 Variable f : Int -> Int -> Bool
 Variable P : Int -> Int -> Bool

tests/lean/apply_tac1.lean.expected.out

@@ -1,5 +1,7 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'tactic'
+  Imported 'int'
   Assumed: f
   Assumed: P
   Assumed: Ax1

tests/lean/arith1.lean

@@ -1,3 +1,4 @@
+Import int.
 Check 10 + 20
 Check 10
 Check 10 - 20

tests/lean/arith1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 10 + 20 : ℕ
 10 : ℕ
 10 - 20 : ℤ

tests/lean/arith2.lean

@@ -1,3 +1,5 @@
+Import int.
+Import real.
 Show 1/2
 Eval 4/6
 Show 3 div 2

tests/lean/arith2.lean.expected.out

@@ -1,5 +1,7 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
+  Imported 'real'
 1 / 2
 2/3
 3 div 2

tests/lean/arith3.lean

@@ -1,3 +1,4 @@
+Import int.
 Eval 8 mod 3
 Eval 8 div 4
 Eval 7 div 3

tests/lean/arith3.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 2
 2
 2

tests/lean/arith6.lean

@@ -1,3 +1,4 @@
+Import int.
 SetOption pp::unicode false
 Show 3 | 6
 Eval 3 | 6

tests/lean/arith6.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Set: pp::unicode
 3 | 6
 true

tests/lean/arith7.lean

@@ -1,3 +1,4 @@
+Import int.
 Eval | -2 |
 (*
    Unfortunately, we can't write |-2|, because |- is considered a single token.

tests/lean/arith7.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 2
 3
   Defined: x

tests/lean/arith8.lean

@@ -1,3 +1,4 @@
+Import real.
 Eval 10.3
 Eval 0.3
 Eval 0.3 + 0.1

tests/lean/arith8.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'real'
 103/10
 3/10
 2/5

tests/lean/arrow.lean

@@ -1,3 +1,4 @@
+Import int.
 Show (Int -> Int) -> Int
 Show Int -> Int -> Int
 Show Int -> (Int -> Int)

tests/lean/arrow.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 (ℤ → ℤ) → ℤ
 ℤ → ℤ → ℤ
 ℤ → ℤ → ℤ

tests/lean/bad1.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable g : Pi A : Type, A -> A.
 Variables a b : Int
 Axiom H1 : g _ a > 0

tests/lean/bad1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: g
   Assumed: a
   Assumed: b

tests/lean/bad2.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable list : Type -> Type
 Variable nil  {A : Type} : list A
 Variable cons {A : Type} (head : A) (tail : list A) : list A

tests/lean/bad2.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: list
   Assumed: nil
   Assumed: cons

tests/lean/bad3.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable list : Type -> Type
 Variable nil  {A : Type} : list A
 Variable cons {A : Type} (head : A) (tail : list A) : list A

tests/lean/bad3.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: list
   Assumed: nil
   Assumed: cons

tests/lean/bad4.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable f {A : Type} (a : A) : A
 Variable a : Int
 Definition tst : Bool := (fun x, (f x) > 10) a

tests/lean/bad4.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: f
   Assumed: a
   Defined: tst

tests/lean/bad5.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable g {A : Type} (a : A) : A
 Variable a : Int
 Variable b : Int

tests/lean/bad5.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: g
   Assumed: a
   Assumed: b

tests/lean/bad6.lean

@@ -1,3 +1,5 @@
+Import int.
+Import real.
 Variable f {A : Type} (a : A) : A
 Variable a : Int
 Variable b : Real

tests/lean/bad6.lean.expected.out

@@ -1,5 +1,7 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
+  Imported 'real'
   Assumed: f
   Assumed: a
   Assumed: b

tests/lean/bad7.lean

@@ -1,3 +1,4 @@
+Import real.
 Variable f {A : Type} (a b : A) : Bool
 Variable a : Int
 Variable b : Real

tests/lean/bad7.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'real'
   Assumed: f
   Assumed: a
   Assumed: b

tests/lean/bad8.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable list : Type → Type
 Variable nil {A : Type} : list A
 Variable cons {A : Type} (head : A) (tail : list A) : list A

tests/lean/bad8.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: list
   Assumed: nil
   Assumed: cons

tests/lean/cast1.lean

@@ -1,4 +1,5 @@
-Import cast
+Import cast.
+Import int.
 
 Variable vector : Type -> Nat -> Type
 Axiom N0 (n : Nat) : n + 0 = n

tests/lean/cast1.lean.expected.out

@@ -1,13 +1,14 @@
   Set: pp::colors
   Set: pp::unicode
   Imported 'cast'
+  Imported 'int'
   Assumed: vector
   Assumed: N0
   Proved: V0
   Assumed: f
   Assumed: m
   Assumed: v1
-Error (line: 14, pos: 6) type mismatch at application
+Error (line: 15, pos: 6) type mismatch at application
     f m v1
 Function type:
     Π (n : ℕ), vector ℤ n → ℤ

tests/lean/conv.lean

@@ -1,3 +1,4 @@
+Import int.
 Definition id (A : Type) : (Type U) := A.
 Variable p : (Int -> Int) -> Bool.
 Check fun (x : id Int), x.

tests/lean/conv.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Defined: id
   Assumed: p
 λ x : id ℤ, x : id ℤ → id ℤ

tests/lean/elab1.lean.expected.out

@@ -2,111 +2,23 @@
   Set: pp::unicode
   Assumed: f
 Failed to solve
- ⊢ (?M::1 ≈ λ x : ℕ, x) ⊕ (?M::1 ≈ nat_to_int) ⊕ (?M::1 ≈ nat_to_real)
+ ⊢ Bool ≺ ℕ
-    (line: 4: pos: 8) Coercion for
+    Substitution
-        10
+     ⊢ Bool ≺ ?M::0
-    Failed to solve
+        (line: 4: pos: 6) Type of argument 3 must be convertible to the expected type in the application of
-     ⊢ Bool ≺ ℕ
+            @f
-        Substitution
+        with arguments:
-         ⊢ Bool ≺ ?M::0
+            ?M::0
-            (line: 4: pos: 6) Type of argument 3 must be convertible to the expected type in the application of
+            10
+            ⊤
+        Assignment
+         ⊢ ℕ ≺ ?M::0
+            (line: 4: pos: 6) Type of argument 2 must be convertible to the expected type in the application of
                 @f
             with arguments:
                 ?M::0
-                ?M::1 10
+                10
                 ⊤
-            Assignment
-             ⊢ ℕ ≺ ?M::0
-                Substitution
-                 ⊢ ?M::5[inst:0 (10)] ≺ ?M::0
-                    (line: 4: pos: 6) Type of argument 2 must be convertible to the expected type in the application of
-                        @f
-                    with arguments:
-                        ?M::0
-                        ?M::1 10
-                        ⊤
-                    Assignment
-                    x : ℕ ⊢ ℕ ≈ ?M::5
-                        Destruct/Decompose
-                         ⊢ ℕ → ℕ ≈ Π x : ?M::4, ?M::5
-                            Substitution
-                             ⊢ ?M::3 ≈ Π x : ?M::4, ?M::5
-                                 Function expected at
-                                    ?M::1 10
-                                Assignment
-                                 ⊢ ℕ → ℕ ≺ ?M::3
-                                    Propagate type, ?M::1 : ?M::3
-                                        Assignment
-                                         ⊢ ?M::1 ≈ λ x : ℕ, x
-                                            Assumption 0
-    Failed to solve
-     ⊢ Bool ≺ ℤ
-        Substitution
-         ⊢ Bool ≺ ?M::0
-            (line: 4: pos: 6) Type of argument 3 must be convertible to the expected type in the application of
-                @f
-            with arguments:
-                ?M::0
-                ?M::1 10
-                ⊤
-            Assignment
-             ⊢ ℤ ≺ ?M::0
-                Substitution
-                 ⊢ ?M::5[inst:0 (10)] ≺ ?M::0
-                    (line: 4: pos: 6) Type of argument 2 must be convertible to the expected type in the application of
-                        @f
-                    with arguments:
-                        ?M::0
-                        ?M::1 10
-                        ⊤
-                    Assignment
-                    a : ℕ ⊢ ℤ ≈ ?M::5
-                        Destruct/Decompose
-                         ⊢ ℕ → ℤ ≈ Π x : ?M::4, ?M::5
-                            Substitution
-                             ⊢ ?M::3 ≈ Π x : ?M::4, ?M::5
-                                 Function expected at
-                                    ?M::1 10
-                                Assignment
-                                 ⊢ ℕ → ℤ ≺ ?M::3
-                                    Propagate type, ?M::1 : ?M::3
-                                        Assignment
-                                         ⊢ ?M::1 ≈ nat_to_int
-                                            Assumption 1
-    Failed to solve
-     ⊢ Bool ≺ ℝ
-        Substitution
-         ⊢ Bool ≺ ?M::0
-            (line: 4: pos: 6) Type of argument 3 must be convertible to the expected type in the application of
-                @f
-            with arguments:
-                ?M::0
-                ?M::1 10
-                ⊤
-            Assignment
-             ⊢ ℝ ≺ ?M::0
-                Substitution
-                 ⊢ ?M::5[inst:0 (10)] ≺ ?M::0
-                    (line: 4: pos: 6) Type of argument 2 must be convertible to the expected type in the application of
-                        @f
-                    with arguments:
-                        ?M::0
-                        ?M::1 10
-                        ⊤
-                    Assignment
-                    a : ℕ ⊢ ℝ ≈ ?M::5
-                        Destruct/Decompose
-                         ⊢ ℕ → ℝ ≈ Π x : ?M::4, ?M::5
-                            Substitution
-                             ⊢ ?M::3 ≈ Π x : ?M::4, ?M::5
-                                 Function expected at
-                                    ?M::1 10
-                                Assignment
-                                 ⊢ ℕ → ℝ ≺ ?M::3
-                                    Propagate type, ?M::1 : ?M::3
-                                        Assignment
-                                         ⊢ ?M::1 ≈ nat_to_real
-                                            Assumption 2
   Assumed: g
 Error (line: 7, pos: 8) invalid expression, it still contains metavariables after elaboration, metavariable: ?M::1, type:
 Type

tests/lean/elab4.lean.expected.out

@@ -7,8 +7,6 @@
   Set: lean::pp::implicit
 Import "kernel"
 Import "nat"
-Import "int"
-Import "real"
 Variable C {A B : Type} (H : @eq Type A B) (a : A) : B
 Variable D {A A' : Type} {B : A → Type} {B' : A' → Type} (H : @eq Type (Π x : A, B x) (Π x : A', B' x)) :
     @eq Type A A'

tests/lean/elab5.lean.expected.out

@@ -7,8 +7,6 @@
   Set: lean::pp::implicit
 Import "kernel"
 Import "nat"
-Import "int"
-Import "real"
 Variable C {A B : Type} (H : @eq Type A B) (a : A) : B
 Variable D {A A' : Type} {B : A → Type} {B' : A' → Type} (H : @eq Type (Π x : A, B x) (Π x : A', B' x)) :
     @eq Type A A'

tests/lean/eq1.lean

@@ -1,4 +1,4 @@
-
+Import int.
 Variable i : Int
 Check i = 0
 SetOption pp::coercion true

tests/lean/eq1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: i
 i = 0 : Bool
   Set: lean::pp::coercion

tests/lean/eq2.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable List : Type -> Type
 Variable nil  {A : Type} : List A
 Variable cons {A : Type} (head : A) (tail : List A) : List A

tests/lean/eq2.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: List
   Assumed: nil
   Assumed: cons

tests/lean/exists1.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable a : Int
 Variable P : Int -> Int -> Bool
 Axiom H : P a a

tests/lean/exists1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: a
   Assumed: P
   Assumed: H

tests/lean/exists2.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable a : Int
 Variable P : Int -> Int -> Bool
 Variable f : Int -> Int -> Int

tests/lean/exists2.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: a
   Assumed: P
   Assumed: f

tests/lean/exists3.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable P : Int -> Int -> Bool
 
 Theorem T1 (R1 : not (exists x y, P x y)) : forall x y, not (P x y) :=

tests/lean/exists3.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: P
   Proved: T1
   Assumed: Ax

tests/lean/exists6.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable P : Int -> Int -> Int -> Bool
 Axiom Ax1 : exists x y z, P x y z
 Axiom Ax2 : forall x y z, not (P x y z)

tests/lean/exists6.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: P
   Assumed: Ax1
   Assumed: Ax2

tests/lean/explicit.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable f {A : Type} : A -> A -> A
 Variable module::g {A : Type} : A -> A -> A
 Check @f

tests/lean/explicit.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: f
   Assumed: module::g
 @f : Π (A : Type), A → A → A
@@ -8,4 +9,4 @@ module::@g : Π (A : Type), A → A → A
 h::1::explicit : Π (A B : Type), A → B → A
   Assumed: @h
   Assumed: h
-Error (line: 8, pos: 37) failed to mark implicit arguments for 'h', the frontend already has an object named '@h'
+Error (line: 9, pos: 37) failed to mark implicit arguments for 'h', the frontend already has an object named '@h'

tests/lean/forall1.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable P : Int -> Bool
 Axiom Ax (x : Int) : P x
 Check ForallIntro Ax

tests/lean/forall1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: P
   Assumed: Ax
 ForallIntro Ax : ∀ x : ℤ, P x

tests/lean/ho.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable g {A : Type} (a : A) : A
 Variable a : Int
 Variable b : Int

tests/lean/ho.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: g
   Assumed: a
   Assumed: b

tests/lean/implicit1.lean

@@ -1,3 +1,5 @@
+Import int.
+Import real.
 Variable f : Int -> Int -> Int
 Show forall a, f a a > 0
 Show forall a b, f a b > 0

tests/lean/implicit1.lean.expected.out

@@ -1,5 +1,7 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
+  Imported 'real'
   Assumed: f
 ∀ a : ℤ, f a a > 0
 ∀ a b : ℤ, f a b > 0

tests/lean/implicit2.lean

@@ -1,3 +1,4 @@
+Import real.
 Variable f {A : Type} (x y : A) : A
 Check f 10 20
 Check f 10

tests/lean/implicit2.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'real'
   Assumed: f
 f 10 20 : ℕ
 f 10 : ℕ → ℕ
@@ -7,6 +8,6 @@ f 10 : ℕ → ℕ
   Assumed: g
 g 10 20 ⊤ : Bool → Bool
 let r : ℝ → ℝ → ℝ := g 10 20 in r : ℝ → ℝ → ℝ
-Error (line: 10, pos: 0) invalid expression, unexpected token
+Error (line: 11, pos: 0) invalid expression, unexpected token
   Set: lean::pp::implicit
 let r : ℝ → ℝ → ℝ := @g ℕ 10 20 ℝ in r : ℝ → ℝ → ℝ

tests/lean/implicit3.lean

@@ -1,3 +1,5 @@
+Import int.
+
 Show 10 = 20
 Variable f : Int -> Int -> Int
 Variable g : Int -> Int -> Int -> Int

tests/lean/implicit3.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 10 = 20
   Assumed: f
   Assumed: g

tests/lean/implicit4.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable f {A : Type}     (a1 a2 : A) {B : Type} (b1 b2 : B) : A
 Variable g {A1 A2 : Type} (a1 : A1) (a2 : A2) {B : Type} (b : B) : A1
 Variable p (a1 a2 : Int)  {B : Type} (b1 b2 b3 : B) : B

tests/lean/implicit4.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: f
   Assumed: g
   Assumed: p

tests/lean/implicit5.lean

@@ -1,3 +1,5 @@
+Import int.
+Import real.
 Variable f {A : Type} (a1 a2 : A) : A
 Variable g : Int -> Int -> Int
 Variable h : Int -> Int -> Real -> Int

tests/lean/implicit5.lean.expected.out

@@ -1,5 +1,7 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
+  Imported 'real'
   Assumed: f
   Assumed: g
   Assumed: h

tests/lean/implicit6.lean

@@ -1,3 +1,4 @@
+Import int.
 Variable f {A : Type} : A -> A -> A
 Infixl 65 + : f
 Show true + false

tests/lean/implicit6.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: f
 ⊤ + ⊥
 10 + 20

tests/lean/interactive/t7.lean

@@ -1,3 +1,4 @@
+Import int.
 (** import("tactic.lua") **)
 Variable q : Int -> Int -> Bool.
 Variable p : Int -> Bool.

tests/lean/interactive/t7.lean.expected.out

@@ -1,6 +1,7 @@
 #   Set: pp::colors
   Set: pp::unicode
-  Assumed: q
+  Imported 'int'
+#   Assumed: q
 #   Assumed: p
 #   Assumed: Ax
 #   Assumed: a

tests/lean/let1.lean

@@ -1,3 +1,4 @@
+Import int.
 
 Show let a : Nat := 10, b : Nat := 20, c : Nat := 30, d : Nat := 10 in a + b + c + d
 Show let a : Nat := 1000000000000000000, b : Nat := 20000000000000000000, c : Nat := 3000000000000000000, d : Nat := 4000000000000000000 in a + b + c + d

tests/lean/let1.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 let a : ℕ := 10, b : ℕ := 20, c : ℕ := 30, d : ℕ := 10 in a + b + c + d
 let a : ℕ := 1000000000000000000,
     b : ℕ := 20000000000000000000,

tests/lean/let3.lean

@@ -1,3 +1,4 @@
+Import int.
 
 Variable magic : Pi (H : Bool), H
 

tests/lean/let3.lean.expected.out

@@ -1,5 +1,6 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
   Assumed: magic
   Set: lean::pp::notation
   Set: lean::pp::coercion

tests/lean/let4.lean

@@ -1,3 +1,4 @@
+Import int.
 
 Show
 let b := true,

tests/lean/let4.lean.expected.out

@@ -1,23 +1,24 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 let b := ⊤, a : ℤ := b in a
   Assumed: vector
   Assumed: const
 let a := 10, v1 := const a ⊤, v2 := v1 in v2 : vector Bool 10
 let a := 10, v1 : vector Bool a := const a ⊤, v2 : vector Bool a := v1 in v2
 let a := 10, v1 : vector Bool a := const a ⊤, v2 : vector Bool a := v1 in v2 : vector Bool 10
-Error (line: 31, pos: 26) type mismatch at definition 'v2', expected type
+Error (line: 32, pos: 26) type mismatch at definition 'v2', expected type
     vector ℤ a
 Given type:
     vector Bool a
   Assumed: foo
   Coercion foo
-Error (line: 40, pos: 26) type mismatch at definition 'v2', expected type
+Error (line: 41, pos: 26) type mismatch at definition 'v2', expected type
     vector ℤ a
 Given type:
     vector Bool a
   Set: lean::pp::coercion
-Error (line: 48, pos: 26) type mismatch at definition 'v2', expected type
+Error (line: 49, pos: 26) type mismatch at definition 'v2', expected type
     vector ℤ a
 Given type:
     vector Bool a

tests/lean/loop2.lean

@@ -1,3 +1,5 @@
+Import int.
+
 (**
  function add_paren(code)
     return "(" .. "** " .. code .. " **" .. ")"

tests/lean/loop2.lean.expected.out

@@ -1,4 +1,5 @@
   Set: pp::colors
   Set: pp::unicode
+  Imported 'int'
 Variable x : ℤ
 done