refactor(library/blast): move simple_strategy to strategies folder

We will add more strategies in the future.

src/CMakeLists.txt

@@ -355,6 +355,8 @@ add_subdirectory(library/blast/forward)
 set(LEAN_OBJS ${LEAN_OBJS} $<TARGET_OBJECTS:forward>)
 add_subdirectory(library/blast/actions)
 set(LEAN_OBJS ${LEAN_OBJS} $<TARGET_OBJECTS:blast_actions>)
+add_subdirectory(library/blast/strategies)
+set(LEAN_OBJS ${LEAN_OBJS} $<TARGET_OBJECTS:blast_strategies>)
 add_subdirectory(library/blast/simplifier)
 set(LEAN_OBJS ${LEAN_OBJS} $<TARGET_OBJECTS:simplifier>)
 add_subdirectory(library/error_handling)

src/library/blast/CMakeLists.txt

@@ -1,4 +1,4 @@
 add_library(blast OBJECT expr.cpp state.cpp blast.cpp blast_tactic.cpp
-  init_module.cpp proof_expr.cpp options.cpp choice_point.cpp
-  simple_strategy.cpp util.cpp gexpr.cpp revert.cpp strategy.cpp
-  congruence_closure.cpp trace.cpp imp_extension.cpp)
+  init_module.cpp proof_expr.cpp options.cpp choice_point.cpp util.cpp
+  gexpr.cpp revert.cpp strategy.cpp congruence_closure.cpp trace.cpp
+  imp_extension.cpp)

src/library/blast/blast.cpp

@@ -27,11 +27,11 @@ Author: Leonardo de Moura
 #include "library/blast/blast.h"
 #include "library/blast/proof_expr.h"
 #include "library/blast/blast_exception.h"
-#include "library/blast/simple_strategy.h"
 #include "library/blast/choice_point.h"
 #include "library/blast/congruence_closure.h"
 #include "library/blast/trace.h"
 #include "library/blast/options.h"
+#include "library/blast/strategies/simple_strategy.h"
 
 namespace lean {
 namespace blast {

src/library/blast/strategies/CMakeLists.txt

@@ -0,0 +1 @@
+add_library(blast_strategies OBJECT simple_strategy.cpp)