diff --git a/stage0/src/Init/Lean/Elab/Tactic/Basic.lean b/stage0/src/Init/Lean/Elab/Tactic/Basic.lean
index 1da09ae145..d627bd4804 100644
--- a/stage0/src/Init/Lean/Elab/Tactic/Basic.lean
+++ b/stage0/src/Init/Lean/Elab/Tactic/Basic.lean
@@ -6,6 +6,7 @@ Authors: Leonardo de Moura, Sebastian Ullrich
 prelude
 import Init.Lean.Elab.Util
 import Init.Lean.Elab.Term
+import Init.Lean.Meta.Tactic.Assumption
 
 namespace Lean
 namespace Elab
@@ -176,13 +177,16 @@ withMVarContext g $ do
   gs' ← liftMetaM ref $ tactic g;
   modify $ fun s => { goals := gs' ++ gs, .. s }
 
-/-
-
 @[builtinTactic seq] def evalSeq : Tactic :=
 fun stx => (stx.getArg 0).forSepArgsM evalTactic
 
 @[builtinTactic «assumption»] def evalAssumption : Tactic :=
-fun _ => pure ()
+fun stx => liftMetaTactic stx $ fun mvarId => do Meta.assumption mvarId; pure []
+
+/-
+@[builtinTactic «intro»] def evalIntro : Tactic :=
+fun stx => match_syntax stx with
+  | `(tactic| intro) =>
 -/
 
 @[init] private def regTraceClasses : IO Unit := do
diff --git a/stage0/src/Init/Lean/Parser/Tactic.lean b/stage0/src/Init/Lean/Parser/Tactic.lean
index 9db140a30c..4d2e02f8ea 100644
--- a/stage0/src/Init/Lean/Parser/Tactic.lean
+++ b/stage0/src/Init/Lean/Parser/Tactic.lean
@@ -35,6 +35,7 @@ end Tactic
 namespace Term
 
 @[builtinTermParser] def tacticBlock := parser! symbol "begin " appPrec >> Tactic.seq >> "end"
+@[builtinTermParser] def tacticStxQuot : Parser := node `Lean.Parser.Term.stxQuot $ symbol "`(tactic|" appPrec >> tacticParser >> ")"
 
 end Term
 
diff --git a/stage0/src/kernel/declaration.cpp b/stage0/src/kernel/declaration.cpp
index 50860e79f8..20d6d331b2 100644
--- a/stage0/src/kernel/declaration.cpp
+++ b/stage0/src/kernel/declaration.cpp
@@ -56,7 +56,13 @@ definition_val::definition_val(name const & n, names const & lparams, expr const
 bool definition_val::is_unsafe() const { return cnstr_get_scalar<unsigned char>(raw(), sizeof(object*)*3) != 0; }
 
 theorem_val::theorem_val(name const & n, names const & lparams, expr const & type, expr const & val):
-    object_ref(mk_cnstr(0, constant_val(n, lparams, type), val)) {
+    object_ref(mk_cnstr(0, constant_val(n, lparams, type), object_ref(lean_task_pure(val.to_obj_arg())))) {
+}
+
+expr theorem_val::get_value() const {
+    object * v_task = lean_ctor_get(raw(), 1);
+    object * v = lean_task_get(v_task);
+    return expr(v, true);
 }
 
 opaque_val::opaque_val(name const & n, names const & lparams, expr const & type, expr const & val, bool is_unsafe):
diff --git a/stage0/src/kernel/declaration.h b/stage0/src/kernel/declaration.h
index ab65cd6288..5fed11b8bd 100644
--- a/stage0/src/kernel/declaration.h
+++ b/stage0/src/kernel/declaration.h
@@ -132,7 +132,7 @@ public:
     name const & get_name() const { return to_constant_val().get_name(); }
     names const & get_lparams() const { return to_constant_val().get_lparams(); }
     expr const & get_type() const { return to_constant_val().get_type(); }
-    expr const & get_value() const { return static_cast<expr const &>(cnstr_get_ref(*this, 1)); }
+    expr get_value() const;
 };
 
 /*
@@ -465,11 +465,6 @@ public:
     bool has_value(bool allow_opaque = false) const {
         return is_theorem() || is_definition() || (allow_opaque && is_opaque());
     }
-    expr const & get_value(bool DEBUG_CODE(allow_opaque)) const {
-        lean_assert(has_value(allow_opaque));
-        return static_cast<expr const &>(cnstr_get_ref(to_val(), 1));
-    }
-    expr const & get_value() const { return get_value(false); }
     reducibility_hints const & get_hints() const;
 
     axiom_val const & to_axiom_val() const { lean_assert(is_axiom()); return static_cast<axiom_val const &>(to_val()); }
@@ -480,6 +475,15 @@ public:
     constructor_val const & to_constructor_val() const { lean_assert(is_constructor()); return static_cast<constructor_val const &>(to_val()); }
     recursor_val const & to_recursor_val() const { lean_assert(is_recursor()); return static_cast<recursor_val const &>(to_val()); }
     quot_val const & to_quot_val() const { lean_assert(is_quot()); return static_cast<quot_val const &>(to_val()); }
+
+    expr get_value(bool DEBUG_CODE(allow_opaque)) const {
+        lean_assert(has_value(allow_opaque));
+        if (is_theorem())
+            return to_theorem_val().get_value();
+        else
+            return static_cast<expr const &>(cnstr_get_ref(to_val(), 1));
+    }
+    expr get_value() const { return get_value(false); }
 };
 
 inline optional<constant_info> none_constant_info() { return optional<constant_info>(); }
diff --git a/stage0/src/library/util.cpp b/stage0/src/library/util.cpp
index cd64296fe4..cd00ec10d9 100644
--- a/stage0/src/library/util.cpp
+++ b/stage0/src/library/util.cpp
@@ -263,7 +263,8 @@ optional<name> is_constructor_app_ext(environment const & env, expr const & e) {
     optional<constant_info> info = env.find(const_name(f));
     if (!info || !info->has_value())
         return optional<name>();
-    expr const * it = &info->get_value();
+    expr val = info->get_value();
+    expr const * it = &val;
     while (is_lambda(*it))
         it = &binding_body(*it);
     return is_constructor_app_ext(env, *it);
diff --git a/stage0/stdlib/Init/Lean/Elab/Tactic/Basic.c b/stage0/stdlib/Init/Lean/Elab/Tactic/Basic.c
index 14b86a6860..e3f0a135d3 100644
--- a/stage0/stdlib/Init/Lean/Elab/Tactic/Basic.c
+++ b/stage0/stdlib/Init/Lean/Elab/Tactic/Basic.c
@@ -1,6 +1,6 @@
 // Lean compiler output
 // Module: Init.Lean.Elab.Tactic.Basic
-// Imports: Init.Lean.Elab.Util Init.Lean.Elab.Term
+// Imports: Init.Lean.Elab.Util Init.Lean.Elab.Term Init.Lean.Meta.Tactic.Assumption
 #include "runtime/lean.h"
 #if defined(__clang__)
 #pragma clang diagnostic ignored "-Wunused-parameter"
@@ -22,6 +22,7 @@ lean_object* l___private_Init_Lean_Elab_Tactic_Basic_1__evalTacticUsing___main(l
 lean_object* l_Lean_Elab_Tactic_getLocalInsts___boxed(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_declareLeadingBuiltinParser___closed__1;
 lean_object* l_Lean_registerTraceClass(lean_object*, lean_object*);
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4;
 lean_object* l_Lean_Elab_Tactic_withMVarContext___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 uint8_t l_PersistentHashMap_contains___at_Lean_Elab_Tactic_addBuiltinTactic___spec__4(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_evalTactic___main___closed__3;
@@ -56,6 +57,7 @@ lean_object* l_Lean_Elab_Tactic_monadQuotation___closed__1;
 lean_object* lean_dbg_trace(lean_object*, lean_object*);
 lean_object* lean_io_mk_ref(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_ElabFnTable_insert___rarg(lean_object*, lean_object*, lean_object*);
+lean_object* l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_List_append___rarg(lean_object*, lean_object*);
 uint8_t lean_name_eq(lean_object*, lean_object*);
 lean_object* lean_io_ref_get(lean_object*, lean_object*);
@@ -63,7 +65,9 @@ lean_object* l_Lean_Elab_Tactic_evalTactic(lean_object*, lean_object*, lean_obje
 lean_object* l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses(lean_object*);
 uint8_t l_PersistentHashMap_containsAtAux___main___at_Lean_Parser_mkFreshKindAux___main___spec__3(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_resettingSynthInstanceCacheWhen___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1;
 lean_object* l_PersistentHashMap_findAux___main___at_Lean_Elab_Tactic_evalTactic___main___spec__3(lean_object*, size_t, lean_object*);
+lean_object* l_Lean_Meta_assumption___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* lean_array_push(lean_object*, lean_object*);
 lean_object* lean_array_get_size(lean_object*);
 uint8_t l_Lean_SMap_contains___at_Lean_Elab_Tactic_addBuiltinTactic___spec__1(lean_object*, lean_object*);
@@ -115,16 +119,20 @@ lean_object* l_Lean_Name_append___main(lean_object*, lean_object*);
 lean_object* l_PersistentHashMap_findAux___main___at_Lean_Elab_Tactic_evalTactic___main___spec__3___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_dbgTrace___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_addContext(lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Elab_Tactic_evalSeq___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_PersistentHashMap_contains___at_Lean_Elab_Tactic_addBuiltinTactic___spec__4___boxed(lean_object*, lean_object*);
 lean_object* lean_array_get(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_liftTermElabM(lean_object*);
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4;
 lean_object* l_PersistentHashMap_find_x3f___at_Lean_Elab_Tactic_evalTactic___main___spec__2___boxed(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__2(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_resetSynthInstanceCache___closed__1;
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2;
 uint8_t l_Array_isEqvAux___main___at_Lean_Elab_Tactic_withMVarContext___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 size_t l_Lean_Name_hash(lean_object*);
 extern lean_object* l_Lean_Elab_Term_State_inhabited___closed__2;
 extern lean_object* l_Char_HasRepr___closed__1;
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1;
 lean_object* l_Lean_Elab_Tactic_getMVarDecl___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_resetSynthInstanceCache(lean_object*, lean_object*);
 lean_object* l_PersistentHashMap_containsAux___main___at_Lean_Elab_Tactic_addBuiltinTactic___spec__5___boxed(lean_object*, lean_object*, lean_object*);
@@ -135,13 +143,16 @@ lean_object* l_Lean_Elab_Tactic_builtinTacticTable;
 lean_object* l_Lean_Elab_Tactic_tacticElabAttribute___closed__4;
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__4___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_State_inhabited___closed__1;
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2;
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__2___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Term_throwUnsupportedSyntax___boxed(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_declareBuiltinParser___closed__7;
 lean_object* l_Lean_Elab_Tactic_monadLog___closed__8;
 extern lean_object* l_Lean_Options_empty;
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq(lean_object*);
 lean_object* l_Lean_Elab_Tactic_withLCtx___rarg(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_ReaderT_read___at_Lean_Elab_Tactic_monadLog___spec__1(lean_object*, lean_object*);
+lean_object* l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 size_t lean_usize_modn(size_t, lean_object*);
 lean_object* l_Lean_Elab_Tactic_tacticElabAttribute___closed__1;
 lean_object* l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1___closed__3;
@@ -154,13 +165,16 @@ lean_object* l_Lean_Elab_Tactic_declareBuiltinTactic___closed__6;
 extern lean_object* l_Lean_PersistentEnvExtension_inhabited___rarg___closed__3;
 lean_object* l_Lean_Elab_Tactic_liftMetaM(lean_object*);
 lean_object* l_Lean_Elab_Tactic_tacticElabAttribute;
+extern lean_object* l_Lean_Parser_Term_seq___elambda__1___closed__1;
 lean_object* l_Lean_ConstantInfo_type(lean_object*);
 lean_object* l_Lean_Elab_Tactic_State_inhabited;
 lean_object* l_HashMapImp_find_x3f___at_Lean_Elab_Tactic_evalTactic___main___spec__5(lean_object*, lean_object*);
 size_t l_USize_land(size_t, size_t);
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__1(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_ParametricAttribute_setParam___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Elab_Tactic_evalAssumption___lambda__1___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_liftMetaTactic___lambda__1(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption(lean_object*);
 lean_object* l_Lean_Elab_Tactic_registerBuiltinTacticAttr___closed__3;
 lean_object* l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1___closed__5;
 lean_object* l_Lean_Elab_Term_traceAtCmdPos___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
@@ -171,9 +185,12 @@ lean_object* l_Lean_Elab_Tactic_withLCtx(lean_object*);
 lean_object* l_Lean_Elab_Term_liftMetaM___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_evalTactic___main___closed__4;
 lean_object* l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1___closed__4;
+lean_object* l_Lean_Elab_Tactic_evalAssumption___lambda__1(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_declareBuiltinTactic___closed__4;
 extern lean_object* l_Lean_Elab_Exception_inhabited;
 lean_object* l_Lean_Elab_Tactic_liftTermElabM___rarg___closed__1;
+lean_object* l_Lean_Elab_Tactic_evalAssumption___closed__1;
+extern lean_object* l_Lean_Meta_assumptionAux___closed__1;
 lean_object* l_Lean_Elab_Tactic_liftMetaTactic(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_evalTactic___main___closed__1;
 lean_object* l_Lean_Elab_Tactic_evalTactic___main___lambda__1___boxed(lean_object*, lean_object*);
@@ -184,10 +201,13 @@ lean_object* l_Lean_Elab_Tactic_evalTactic___main(lean_object*, lean_object*, le
 lean_object* l_Lean_nameToExprAux___main(lean_object*);
 lean_object* l_Lean_Elab_Tactic_declareBuiltinTactic___closed__1;
 lean_object* l_Lean_Elab_Term_throwError___rarg___boxed(lean_object*, lean_object*, lean_object*, lean_object*);
+lean_object* l_Lean_Syntax_getArgs(lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___closed__6;
+lean_object* l_Lean_Elab_Tactic_evalSeq(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Environment_addAndCompile(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Syntax_getKind(lean_object*);
 lean_object* l_Lean_Elab_Tactic_resettingSynthInstanceCache(lean_object*);
+lean_object* l_Lean_Elab_Tactic_evalAssumption(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___closed__2;
 lean_object* l_Lean_Elab_Tactic_addBuiltinTactic(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_getOptions___boxed(lean_object*, lean_object*);
@@ -211,6 +231,7 @@ lean_object* l_Lean_Elab_Tactic_liftTermElabM___rarg(lean_object*, lean_object*,
 lean_object* l_Lean_Elab_Tactic_getOptions(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_tacticElabAttribute___closed__5;
 lean_object* l_Lean_Elab_Tactic_getEnv___rarg(lean_object*);
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3;
 lean_object* l_Lean_Elab_Tactic_withMacroExpansion___rarg(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_AssocList_find___main___at_Lean_Elab_Tactic_evalTactic___main___spec__6(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__3(lean_object*, lean_object*, lean_object*);
@@ -218,6 +239,7 @@ lean_object* l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1(lean_objec
 lean_object* l_Lean_PersistentEnvExtension_getState___rarg(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_tacticElabAttribute___closed__3;
 lean_object* l_HashMapImp_contains___at_Lean_Elab_Tactic_addBuiltinTactic___spec__2___boxed(lean_object*, lean_object*);
+lean_object* l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_regBuiltinTacticParserAttr___closed__3;
 extern lean_object* l___private_Init_Lean_Parser_Parser_8__throwParserCategoryAlreadyDefined___rarg___closed__2;
 extern lean_object* l___private_Init_Lean_Meta_Tactic_Util_1__regTraceClasses___closed__1;
@@ -225,6 +247,7 @@ lean_object* l_Lean_Elab_Tactic_throwUnsupportedSyntax___rarg(lean_object*, lean
 uint8_t l_AssocList_contains___main___at_Lean_Elab_Tactic_addBuiltinTactic___spec__3(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_getMVarDecl(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_evalTactic___main___lambda__1(lean_object*, lean_object*);
+lean_object* l_Lean_Syntax_getArg(lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___closed__11;
 lean_object* l_Lean_SMap_contains___at_Lean_Elab_Tactic_addBuiltinTactic___spec__1___boxed(lean_object*, lean_object*);
 uint8_t l_Lean_LocalInstance_beq(lean_object*, lean_object*);
@@ -236,6 +259,7 @@ lean_object* l_Lean_Elab_Term_resetSynthInstanceCache___boxed(lean_object*);
 lean_object* l_Lean_Elab_Tactic_monadLog___lambda__1___boxed(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_liftMetaTactic___closed__3;
 extern lean_object* l_Lean_Parser_regBuiltinTacticParserAttr___closed__4;
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3;
 lean_object* l_Array_iterateMAux___main___at_Lean_mkAppN___spec__1(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Elab_Tactic_dbgTrace(lean_object*);
 lean_object* l_Lean_Name_toStringWithSep___main(lean_object*, lean_object*);
@@ -9479,6 +9503,271 @@ lean_dec(x_3);
 return x_5;
 }
 }
+lean_object* l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; uint8_t x_8; 
+x_7 = lean_array_get_size(x_2);
+x_8 = lean_nat_dec_lt(x_3, x_7);
+lean_dec(x_7);
+if (x_8 == 0)
+{
+lean_object* x_9; 
+lean_dec(x_5);
+lean_dec(x_3);
+x_9 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_9, 0, x_4);
+lean_ctor_set(x_9, 1, x_6);
+return x_9;
+}
+else
+{
+lean_object* x_10; lean_object* x_11; 
+lean_dec(x_4);
+x_10 = lean_array_fget(x_2, x_3);
+lean_inc(x_5);
+x_11 = l_Lean_Elab_Tactic_evalTactic___main(x_10, x_5, x_6);
+if (lean_obj_tag(x_11) == 0)
+{
+lean_object* x_12; lean_object* x_13; lean_object* x_14; 
+x_12 = lean_ctor_get(x_11, 0);
+lean_inc(x_12);
+x_13 = lean_ctor_get(x_11, 1);
+lean_inc(x_13);
+lean_dec(x_11);
+x_14 = lean_nat_add(x_3, x_1);
+lean_dec(x_3);
+x_3 = x_14;
+x_4 = x_12;
+x_6 = x_13;
+goto _start;
+}
+else
+{
+uint8_t x_16; 
+lean_dec(x_5);
+lean_dec(x_3);
+x_16 = !lean_is_exclusive(x_11);
+if (x_16 == 0)
+{
+return x_11;
+}
+else
+{
+lean_object* x_17; lean_object* x_18; lean_object* x_19; 
+x_17 = lean_ctor_get(x_11, 0);
+x_18 = lean_ctor_get(x_11, 1);
+lean_inc(x_18);
+lean_inc(x_17);
+lean_dec(x_11);
+x_19 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_19, 0, x_17);
+lean_ctor_set(x_19, 1, x_18);
+return x_19;
+}
+}
+}
+}
+}
+lean_object* l_Lean_Elab_Tactic_evalSeq(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; lean_object* x_5; lean_object* x_6; lean_object* x_7; lean_object* x_8; lean_object* x_9; 
+x_4 = lean_unsigned_to_nat(0u);
+x_5 = l_Lean_Syntax_getArg(x_1, x_4);
+x_6 = l_Lean_Syntax_getArgs(x_5);
+lean_dec(x_5);
+x_7 = lean_unsigned_to_nat(2u);
+x_8 = lean_box(0);
+x_9 = l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1(x_7, x_6, x_4, x_8, x_2, x_3);
+lean_dec(x_6);
+return x_9;
+}
+}
+lean_object* l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3, lean_object* x_4, lean_object* x_5, lean_object* x_6) {
+_start:
+{
+lean_object* x_7; 
+x_7 = l_Lean_Syntax_foldArgsAuxM___main___at_Lean_Elab_Tactic_evalSeq___spec__1(x_1, x_2, x_3, x_4, x_5, x_6);
+lean_dec(x_2);
+lean_dec(x_1);
+return x_7;
+}
+}
+lean_object* l_Lean_Elab_Tactic_evalSeq___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; 
+x_4 = l_Lean_Elab_Tactic_evalSeq(x_1, x_2, x_3);
+lean_dec(x_1);
+return x_4;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1___closed__3;
+x_2 = l_Lean_Parser_Term_seq___elambda__1___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("evalSeq");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Elab_Tactic_declareBuiltinTactic___closed__3;
+x_2 = l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Tactic_evalSeq___boxed), 3, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1;
+x_3 = l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3;
+x_4 = l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4;
+x_5 = l_Lean_Elab_Tactic_addBuiltinTactic(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
+lean_object* l_Lean_Elab_Tactic_evalAssumption___lambda__1(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; lean_object* x_5; 
+x_4 = lean_box(0);
+x_5 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_5, 0, x_4);
+lean_ctor_set(x_5, 1, x_3);
+return x_5;
+}
+}
+lean_object* _init_l_Lean_Elab_Tactic_evalAssumption___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Tactic_evalAssumption___lambda__1___boxed), 3, 0);
+return x_1;
+}
+}
+lean_object* l_Lean_Elab_Tactic_evalAssumption(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; 
+x_4 = lean_ctor_get(x_3, 1);
+lean_inc(x_4);
+if (lean_obj_tag(x_4) == 0)
+{
+lean_object* x_5; lean_object* x_6; 
+x_5 = l_Lean_Elab_Tactic_liftMetaTactic___closed__3;
+x_6 = l_Lean_Elab_Tactic_throwError___rarg(x_1, x_5, x_2, x_3);
+return x_6;
+}
+else
+{
+lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; lean_object* x_11; lean_object* x_12; lean_object* x_13; lean_object* x_14; lean_object* x_15; 
+x_7 = lean_ctor_get(x_4, 0);
+lean_inc(x_7);
+x_8 = lean_ctor_get(x_4, 1);
+lean_inc(x_8);
+lean_dec(x_4);
+lean_inc(x_7);
+x_9 = lean_alloc_closure((void*)(l_Lean_Meta_assumption___boxed), 3, 1);
+lean_closure_set(x_9, 0, x_7);
+x_10 = l_Lean_Elab_Tactic_evalAssumption___closed__1;
+x_11 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Meta_isClassExpensive___main___spec__4___rarg), 4, 2);
+lean_closure_set(x_11, 0, x_9);
+lean_closure_set(x_11, 1, x_10);
+x_12 = lean_alloc_closure((void*)(l_Lean_Elab_Tactic_liftMetaM___rarg), 4, 2);
+lean_closure_set(x_12, 0, x_1);
+lean_closure_set(x_12, 1, x_11);
+x_13 = lean_alloc_closure((void*)(l_Lean_Elab_Tactic_liftMetaTactic___lambda__1___boxed), 4, 1);
+lean_closure_set(x_13, 0, x_8);
+x_14 = lean_alloc_closure((void*)(l_ReaderT_bind___at_Lean_Elab_Tactic_monadLog___spec__2___rarg), 4, 2);
+lean_closure_set(x_14, 0, x_12);
+lean_closure_set(x_14, 1, x_13);
+x_15 = l_Lean_Elab_Tactic_withMVarContext___rarg(x_7, x_14, x_2, x_3);
+lean_dec(x_7);
+return x_15;
+}
+}
+}
+lean_object* l_Lean_Elab_Tactic_evalAssumption___lambda__1___boxed(lean_object* x_1, lean_object* x_2, lean_object* x_3) {
+_start:
+{
+lean_object* x_4; 
+x_4 = l_Lean_Elab_Tactic_evalAssumption___lambda__1(x_1, x_2, x_3);
+lean_dec(x_2);
+lean_dec(x_1);
+return x_4;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Elab_Tactic_registerBuiltinTacticAttr___lambda__1___closed__3;
+x_2 = l_Lean_Meta_assumptionAux___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("evalAssumption");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Elab_Tactic_declareBuiltinTactic___closed__3;
+x_2 = l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Elab_Tactic_evalAssumption), 3, 0);
+return x_1;
+}
+}
+lean_object* l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; 
+x_2 = l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1;
+x_3 = l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3;
+x_4 = l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4;
+x_5 = l_Lean_Elab_Tactic_addBuiltinTactic(x_2, x_3, x_4, x_1);
+return x_5;
+}
+}
 lean_object* _init_l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses___closed__1() {
 _start:
 {
@@ -9547,6 +9836,7 @@ return x_13;
 }
 lean_object* initialize_Init_Lean_Elab_Util(lean_object*);
 lean_object* initialize_Init_Lean_Elab_Term(lean_object*);
+lean_object* initialize_Init_Lean_Meta_Tactic_Assumption(lean_object*);
 static bool _G_initialized = false;
 lean_object* initialize_Init_Lean_Elab_Tactic_Basic(lean_object* w) {
 lean_object * res;
@@ -9558,6 +9848,9 @@ lean_dec_ref(res);
 res = initialize_Init_Lean_Elab_Term(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+res = initialize_Init_Lean_Meta_Tactic_Assumption(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l_Lean_Elab_Tactic_State_inhabited___closed__1 = _init_l_Lean_Elab_Tactic_State_inhabited___closed__1();
 lean_mark_persistent(l_Lean_Elab_Tactic_State_inhabited___closed__1);
 l_Lean_Elab_Tactic_State_inhabited = _init_l_Lean_Elab_Tactic_State_inhabited();
@@ -9689,6 +9982,30 @@ l_Lean_Elab_Tactic_liftMetaTactic___closed__2 = _init_l_Lean_Elab_Tactic_liftMet
 lean_mark_persistent(l_Lean_Elab_Tactic_liftMetaTactic___closed__2);
 l_Lean_Elab_Tactic_liftMetaTactic___closed__3 = _init_l_Lean_Elab_Tactic_liftMetaTactic___closed__3();
 lean_mark_persistent(l_Lean_Elab_Tactic_liftMetaTactic___closed__3);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__1);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__2);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__3);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq___closed__4);
+res = l___regBuiltinTactic_Lean_Elab_Tactic_evalSeq(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
+l_Lean_Elab_Tactic_evalAssumption___closed__1 = _init_l_Lean_Elab_Tactic_evalAssumption___closed__1();
+lean_mark_persistent(l_Lean_Elab_Tactic_evalAssumption___closed__1);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__1);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__2);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__3);
+l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4 = _init_l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4();
+lean_mark_persistent(l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption___closed__4);
+res = l___regBuiltinTactic_Lean_Elab_Tactic_evalAssumption(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses___closed__1 = _init_l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses___closed__1();
 lean_mark_persistent(l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses___closed__1);
 res = l___private_Init_Lean_Elab_Tactic_Basic_2__regTraceClasses(lean_io_mk_world());
diff --git a/stage0/stdlib/Init/Lean/Parser/Tactic.c b/stage0/stdlib/Init/Lean/Parser/Tactic.c
index 8c72aefd04..add0e5ec63 100644
--- a/stage0/stdlib/Init/Lean/Parser/Tactic.c
+++ b/stage0/stdlib/Init/Lean/Parser/Tactic.c
@@ -20,9 +20,12 @@ lean_object* l___regBuiltinParser_Lean_Parser_Tactic_intro(lean_object*);
 lean_object* l_Lean_Parser_Tactic_orelse___closed__2;
 lean_object* l_Lean_Parser_Tactic_intros___closed__7;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly___elambda__1___closed__1;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__4;
 extern lean_object* l_Lean_Parser_declareLeadingBuiltinParser___closed__1;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__5;
 lean_object* l_Lean_Parser_andthenInfo(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_have___elambda__1___closed__7;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7;
 lean_object* l_Lean_Parser_Tactic_apply___closed__2;
 lean_object* l_Lean_Parser_regBuiltinTacticParserAttr___closed__1;
 lean_object* l_Lean_Parser_sepByInfo(lean_object*, lean_object*);
@@ -35,7 +38,9 @@ lean_object* l_Lean_Parser_Tactic_orelse___closed__1;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__5;
 lean_object* l_Lean_Parser_Tactic_seq___elambda__1___closed__2;
 extern lean_object* l_Lean_Parser_Term_have___elambda__1___closed__10;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___boxed(lean_object*);
 lean_object* l_Lean_Parser_Tactic_seq;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg(lean_object*, lean_object*);
 lean_object* l___private_Init_Lean_Parser_Parser_2__sepByFnAux___main___at_Lean_Parser_Tactic_seq___elambda__1___spec__2___boxed(lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_intro___closed__4;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__3;
@@ -46,6 +51,7 @@ lean_object* l_Lean_Parser_Term_tacticBlock___closed__3;
 lean_object* l_Lean_Parser_Tactic_intro___elambda__1___closed__7;
 lean_object* l___regBuiltinParser_Lean_Parser_Tactic_nestedTacticBlock(lean_object*);
 lean_object* l_Lean_Parser_Tactic_assumption___elambda__1___closed__6;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__4;
 extern lean_object* l_Lean_Parser_Term_have___closed__3;
 lean_object* l_Lean_Parser_ParserState_pushSyntax(lean_object*, lean_object*);
@@ -53,6 +59,7 @@ lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly;
 extern lean_object* l_Lean_Parser_Term_subtype___closed__1;
 lean_object* l_Lean_Parser_ParserState_mkNode(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_apply___closed__4;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__3;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___closed__7;
 lean_object* l_Lean_Parser_Term_tacticBlock___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Tactic_orelse___closed__7;
@@ -87,6 +94,8 @@ lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__13;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__11;
 lean_object* l_Lean_Parser_Tactic_intro___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Tactic_orelse___elambda__1___closed__4;
+lean_object* l_Lean_Parser_Term_tacticStxQuot;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__6;
 lean_object* l_Lean_Parser_Tactic_assumption;
 lean_object* l_Lean_Parser_Tactic_intros___elambda__1(lean_object*, lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_structInst___elambda__1___closed__5;
@@ -96,6 +105,7 @@ uint8_t lean_nat_dec_eq(lean_object*, lean_object*);
 extern lean_object* l_Lean_Parser_Term_orelse___elambda__1___closed__3;
 lean_object* l_Lean_Parser_nonReservedSymbolFnAux(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___closed__1;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__1;
 lean_object* l_Lean_Parser_Tactic_seq___closed__5;
 lean_object* l_Lean_Parser_nodeInfo(lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_seq___closed__3;
@@ -107,10 +117,12 @@ lean_object* l_Lean_Parser_nonReservedSymbolInfo(lean_object*, uint8_t);
 lean_object* l___regBuiltinParser_Lean_Parser_Tactic_intros(lean_object*);
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___elambda__1___closed__12;
 lean_object* l_Lean_Parser_Tactic_seq___elambda__1___closed__3;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot(lean_object*);
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly___closed__6;
 lean_object* l_Lean_Parser_Tactic_intro___elambda__1___closed__6;
 lean_object* l_Lean_Parser_Tactic_intros___closed__2;
 lean_object* l_Lean_Parser_optionaInfo(lean_object*);
+lean_object* l_Lean_Parser_Term_tacticStxQuot___closed__2;
 extern lean_object* l_Lean_Parser_Term_explicitUniv___elambda__1___closed__13;
 lean_object* l___regBuiltinParser_Lean_Parser_Tactic_apply(lean_object*);
 lean_object* l_Lean_Parser_Tactic_apply___closed__6;
@@ -131,6 +143,7 @@ lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___closed__6;
 lean_object* l_Lean_Parser_Tactic_apply___elambda__1___closed__7;
 extern lean_object* l_Lean_Parser_Term_explicitUniv___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Tactic_seq___elambda__1___closed__5;
+extern lean_object* l_Lean_Parser_Level_paren___elambda__1___closed__11;
 lean_object* l_Lean_Parser_Tactic_assumption___closed__2;
 lean_object* l_Lean_Parser_Tactic_intro___elambda__1___closed__8;
 lean_object* l_Lean_Parser_Tactic_intro___closed__7;
@@ -146,6 +159,8 @@ lean_object* l_Lean_Parser_Tactic_apply;
 lean_object* l_Lean_Parser_Tactic_assumption___closed__5;
 lean_object* l_Array_back___at___private_Init_Lean_Parser_Parser_6__updateCache___spec__1(lean_object*);
 lean_object* l_Lean_Parser_ParserState_restore(lean_object*, lean_object*, lean_object*);
+extern lean_object* l_Lean_Parser_Level_paren___closed__4;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1;
 extern lean_object* l_Lean_Parser_Term_seq___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Tactic_intros___elambda__1___closed__1;
 extern lean_object* l_Lean_Parser_Term_explicitUniv___elambda__1___closed__9;
@@ -153,10 +168,13 @@ lean_object* l_Lean_Parser_Tactic_orelse___elambda__1___closed__2;
 lean_object* l_Lean_Parser_Tactic_orelse;
 lean_object* l_Lean_Parser_categoryParserFn(lean_object*, lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_intros___closed__4;
+lean_object* l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2;
 lean_object* l_Lean_Parser_Tactic_apply___elambda__1___closed__5;
 extern lean_object* l_Lean_Parser_regBuiltinTermParserAttr___closed__4;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___closed__2;
 lean_object* l_Lean_Parser_Tactic_assumption___elambda__1___closed__1;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
 lean_object* l_Lean_Parser_mergeOrElseErrors(lean_object*, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_categoryParser(uint8_t, lean_object*, lean_object*);
 lean_object* l_Lean_Parser_Tactic_intro___elambda__1___closed__4;
@@ -168,6 +186,7 @@ lean_object* l_Lean_Parser_Tactic_orelse___elambda__1___closed__1;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly___closed__4;
 lean_object* l_Lean_Parser_Tactic_assumption___closed__3;
 lean_object* l_Lean_Parser_Term_tacticBlock___closed__4;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4;
 lean_object* l_Lean_Parser_Term_tacticBlock___closed__1;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlock___closed__8;
 lean_object* l_Lean_Parser_Term_tacticBlock;
@@ -180,7 +199,11 @@ lean_object* l___private_Init_Lean_Parser_Parser_2__sepByFnAux___main___at_Lean_
 lean_object* l_Lean_Parser_Tactic_intros;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly___elambda__1___closed__3;
 lean_object* l_Lean_Parser_Tactic_nestedTacticBlockCurly___closed__5;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1(lean_object*);
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6;
 lean_object* l_String_trim(lean_object*);
+extern lean_object* l_Lean_Parser_Level_paren___elambda__1___closed__8;
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5;
 lean_object* l_Lean_Parser_Tactic_apply___closed__1;
 lean_object* l___regBuiltinParser_Lean_Parser_Tactic_assumption(lean_object*);
 extern lean_object* l_Lean_Parser_Term_typeAscription___closed__2;
@@ -3122,6 +3145,354 @@ x_6 = l_Lean_Parser_addBuiltinParser(x_2, x_3, x_4, x_5, x_1);
 return x_6;
 }
 }
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("stxQuot");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_explicitUniv___elambda__1___closed__2;
+x_2 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("`(tactic|");
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3;
+x_2 = l_String_trim(x_1);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Char_HasRepr___closed__1;
+x_2 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4;
+x_3 = lean_string_append(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5;
+x_2 = l_Char_HasRepr___closed__1;
+x_3 = lean_string_append(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = lean_box(0);
+x_2 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6;
+x_3 = lean_alloc_ctor(1, 2, 0);
+lean_ctor_set(x_3, 0, x_2);
+lean_ctor_set(x_3, 1, x_1);
+return x_3;
+}
+}
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg(lean_object* x_1, lean_object* x_2) {
+_start:
+{
+lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_38; lean_object* x_39; lean_object* x_40; 
+x_3 = lean_ctor_get(x_2, 0);
+lean_inc(x_3);
+x_4 = lean_array_get_size(x_3);
+lean_dec(x_3);
+x_38 = lean_ctor_get(x_2, 1);
+lean_inc(x_38);
+lean_inc(x_1);
+x_39 = l_Lean_Parser_tokenFn(x_1, x_2);
+x_40 = lean_ctor_get(x_39, 3);
+lean_inc(x_40);
+if (lean_obj_tag(x_40) == 0)
+{
+lean_object* x_41; lean_object* x_42; 
+x_41 = lean_ctor_get(x_39, 0);
+lean_inc(x_41);
+x_42 = l_Array_back___at___private_Init_Lean_Parser_Parser_6__updateCache___spec__1(x_41);
+lean_dec(x_41);
+if (lean_obj_tag(x_42) == 2)
+{
+lean_object* x_43; lean_object* x_44; uint8_t x_45; 
+x_43 = lean_ctor_get(x_42, 1);
+lean_inc(x_43);
+lean_dec(x_42);
+x_44 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4;
+x_45 = lean_string_dec_eq(x_43, x_44);
+lean_dec(x_43);
+if (x_45 == 0)
+{
+lean_object* x_46; lean_object* x_47; 
+x_46 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7;
+x_47 = l_Lean_Parser_ParserState_mkErrorsAt(x_39, x_46, x_38);
+x_5 = x_47;
+goto block_37;
+}
+else
+{
+lean_dec(x_38);
+x_5 = x_39;
+goto block_37;
+}
+}
+else
+{
+lean_object* x_48; lean_object* x_49; 
+lean_dec(x_42);
+x_48 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7;
+x_49 = l_Lean_Parser_ParserState_mkErrorsAt(x_39, x_48, x_38);
+x_5 = x_49;
+goto block_37;
+}
+}
+else
+{
+lean_object* x_50; lean_object* x_51; 
+lean_dec(x_40);
+x_50 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7;
+x_51 = l_Lean_Parser_ParserState_mkErrorsAt(x_39, x_50, x_38);
+x_5 = x_51;
+goto block_37;
+}
+block_37:
+{
+lean_object* x_6; 
+x_6 = lean_ctor_get(x_5, 3);
+lean_inc(x_6);
+if (lean_obj_tag(x_6) == 0)
+{
+lean_object* x_7; lean_object* x_8; lean_object* x_9; lean_object* x_10; 
+x_7 = l_Lean_Parser_regBuiltinTacticParserAttr___closed__4;
+x_8 = lean_unsigned_to_nat(0u);
+lean_inc(x_1);
+x_9 = l_Lean_Parser_categoryParserFn(x_7, x_8, x_1, x_5);
+x_10 = lean_ctor_get(x_9, 3);
+lean_inc(x_10);
+if (lean_obj_tag(x_10) == 0)
+{
+lean_object* x_11; lean_object* x_12; lean_object* x_13; 
+x_11 = lean_ctor_get(x_9, 1);
+lean_inc(x_11);
+x_12 = l_Lean_Parser_tokenFn(x_1, x_9);
+x_13 = lean_ctor_get(x_12, 3);
+lean_inc(x_13);
+if (lean_obj_tag(x_13) == 0)
+{
+lean_object* x_14; lean_object* x_15; 
+x_14 = lean_ctor_get(x_12, 0);
+lean_inc(x_14);
+x_15 = l_Array_back___at___private_Init_Lean_Parser_Parser_6__updateCache___spec__1(x_14);
+lean_dec(x_14);
+if (lean_obj_tag(x_15) == 2)
+{
+lean_object* x_16; lean_object* x_17; uint8_t x_18; 
+x_16 = lean_ctor_get(x_15, 1);
+lean_inc(x_16);
+lean_dec(x_15);
+x_17 = l_Lean_Parser_Level_paren___elambda__1___closed__8;
+x_18 = lean_string_dec_eq(x_16, x_17);
+lean_dec(x_16);
+if (x_18 == 0)
+{
+lean_object* x_19; lean_object* x_20; lean_object* x_21; lean_object* x_22; 
+x_19 = l_Lean_Parser_Level_paren___elambda__1___closed__11;
+x_20 = l_Lean_Parser_ParserState_mkErrorsAt(x_12, x_19, x_11);
+x_21 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_22 = l_Lean_Parser_ParserState_mkNode(x_20, x_21, x_4);
+return x_22;
+}
+else
+{
+lean_object* x_23; lean_object* x_24; 
+lean_dec(x_11);
+x_23 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_24 = l_Lean_Parser_ParserState_mkNode(x_12, x_23, x_4);
+return x_24;
+}
+}
+else
+{
+lean_object* x_25; lean_object* x_26; lean_object* x_27; lean_object* x_28; 
+lean_dec(x_15);
+x_25 = l_Lean_Parser_Level_paren___elambda__1___closed__11;
+x_26 = l_Lean_Parser_ParserState_mkErrorsAt(x_12, x_25, x_11);
+x_27 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_28 = l_Lean_Parser_ParserState_mkNode(x_26, x_27, x_4);
+return x_28;
+}
+}
+else
+{
+lean_object* x_29; lean_object* x_30; lean_object* x_31; lean_object* x_32; 
+lean_dec(x_13);
+x_29 = l_Lean_Parser_Level_paren___elambda__1___closed__11;
+x_30 = l_Lean_Parser_ParserState_mkErrorsAt(x_12, x_29, x_11);
+x_31 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_32 = l_Lean_Parser_ParserState_mkNode(x_30, x_31, x_4);
+return x_32;
+}
+}
+else
+{
+lean_object* x_33; lean_object* x_34; 
+lean_dec(x_10);
+lean_dec(x_1);
+x_33 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_34 = l_Lean_Parser_ParserState_mkNode(x_9, x_33, x_4);
+return x_34;
+}
+}
+else
+{
+lean_object* x_35; lean_object* x_36; 
+lean_dec(x_6);
+lean_dec(x_1);
+x_35 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_36 = l_Lean_Parser_ParserState_mkNode(x_5, x_35, x_4);
+return x_36;
+}
+}
+}
+}
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; 
+x_2 = lean_alloc_closure((void*)(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg), 2, 0);
+return x_2;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__1() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4;
+x_2 = l_Lean_Parser_Level_paren___closed__1;
+x_3 = l_Lean_Parser_symbolInfo(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; lean_object* x_4; 
+x_1 = l_Lean_Parser_Tactic_seq___closed__1;
+x_2 = lean_ctor_get(x_1, 0);
+lean_inc(x_2);
+x_3 = l_Lean_Parser_Level_paren___closed__4;
+x_4 = l_Lean_Parser_andthenInfo(x_2, x_3);
+return x_4;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__3() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___closed__1;
+x_2 = l_Lean_Parser_Term_tacticStxQuot___closed__2;
+x_3 = l_Lean_Parser_andthenInfo(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__4() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2;
+x_2 = l_Lean_Parser_Term_tacticStxQuot___closed__3;
+x_3 = l_Lean_Parser_nodeInfo(x_1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__5() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_alloc_closure((void*)(l_Lean_Parser_Term_tacticStxQuot___elambda__1___boxed), 1, 0);
+return x_1;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot___closed__6() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___closed__4;
+x_2 = l_Lean_Parser_Term_tacticStxQuot___closed__5;
+x_3 = lean_alloc_ctor(0, 2, 0);
+lean_ctor_set(x_3, 0, x_1);
+lean_ctor_set(x_3, 1, x_2);
+return x_3;
+}
+}
+lean_object* _init_l_Lean_Parser_Term_tacticStxQuot() {
+_start:
+{
+lean_object* x_1; 
+x_1 = l_Lean_Parser_Term_tacticStxQuot___closed__6;
+return x_1;
+}
+}
+lean_object* l_Lean_Parser_Term_tacticStxQuot___elambda__1___boxed(lean_object* x_1) {
+_start:
+{
+lean_object* x_2; 
+x_2 = l_Lean_Parser_Term_tacticStxQuot___elambda__1(x_1);
+lean_dec(x_1);
+return x_2;
+}
+}
+lean_object* _init_l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1() {
+_start:
+{
+lean_object* x_1; 
+x_1 = lean_mk_string("tacticStxQuot");
+return x_1;
+}
+}
+lean_object* _init_l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2() {
+_start:
+{
+lean_object* x_1; lean_object* x_2; lean_object* x_3; 
+x_1 = l_Lean_Parser_Term_explicitUniv___elambda__1___closed__2;
+x_2 = l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1;
+x_3 = lean_name_mk_string(x_1, x_2);
+return x_3;
+}
+}
+lean_object* l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot(lean_object* x_1) {
+_start:
+{
+uint8_t x_2; lean_object* x_3; lean_object* x_4; lean_object* x_5; lean_object* x_6; 
+x_2 = 0;
+x_3 = l_Lean_Parser_regBuiltinTermParserAttr___closed__4;
+x_4 = l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2;
+x_5 = l_Lean_Parser_Term_tacticStxQuot;
+x_6 = l_Lean_Parser_addBuiltinParser(x_2, x_3, x_4, x_5, x_1);
+return x_6;
+}
+}
 lean_object* initialize_Init_Lean_Parser_Term(lean_object*);
 static bool _G_initialized = false;
 lean_object* initialize_Init_Lean_Parser_Tactic(lean_object* w) {
@@ -3433,6 +3804,41 @@ lean_mark_persistent(l_Lean_Parser_Term_tacticBlock);
 res = l___regBuiltinParser_Lean_Parser_Term_tacticBlock(lean_io_mk_world());
 if (lean_io_result_is_error(res)) return res;
 lean_dec_ref(res);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__1);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__2);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__3);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__4);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__5);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__6);
+l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7 = _init_l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___elambda__1___rarg___closed__7);
+l_Lean_Parser_Term_tacticStxQuot___closed__1 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__1();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__1);
+l_Lean_Parser_Term_tacticStxQuot___closed__2 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__2();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__2);
+l_Lean_Parser_Term_tacticStxQuot___closed__3 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__3();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__3);
+l_Lean_Parser_Term_tacticStxQuot___closed__4 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__4();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__4);
+l_Lean_Parser_Term_tacticStxQuot___closed__5 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__5();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__5);
+l_Lean_Parser_Term_tacticStxQuot___closed__6 = _init_l_Lean_Parser_Term_tacticStxQuot___closed__6();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot___closed__6);
+l_Lean_Parser_Term_tacticStxQuot = _init_l_Lean_Parser_Term_tacticStxQuot();
+lean_mark_persistent(l_Lean_Parser_Term_tacticStxQuot);
+l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1 = _init_l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1();
+lean_mark_persistent(l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__1);
+l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2 = _init_l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2();
+lean_mark_persistent(l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot___closed__2);
+res = l___regBuiltinParser_Lean_Parser_Term_tacticStxQuot(lean_io_mk_world());
+if (lean_io_result_is_error(res)) return res;
+lean_dec_ref(res);
 return lean_mk_io_result(lean_box(0));
 }
 #ifdef __cplusplus