Add Luau.EqSat project with some barebones.

I have to comment out the `add_subdirectory(fuzz)` in order to allow cmake to finish the configuring step on Windows.

CMakeLists.txt

@@ -28,6 +28,7 @@ add_library(Luau.Ast STATIC)
 add_library(Luau.Compiler STATIC)
 add_library(Luau.Config STATIC)
 add_library(Luau.Analysis STATIC)
+add_library(Luau.EqSat STATIC)
 add_library(Luau.CodeGen STATIC)
 add_library(Luau.VM STATIC)
 add_library(isocline STATIC)
@@ -83,7 +84,12 @@ target_link_libraries(Luau.Config PUBLIC Luau.Ast)
 
 target_compile_features(Luau.Analysis PUBLIC cxx_std_17)
 target_include_directories(Luau.Analysis PUBLIC Analysis/include)
-target_link_libraries(Luau.Analysis PUBLIC Luau.Ast Luau.Config)
+target_link_libraries(Luau.Analysis PUBLIC Luau.Ast Luau.EqSat Luau.Config)
+
+target_compile_features(Luau.EqSat PUBLIC cxx_std_17)
+target_include_directories(Luau.EqSat PUBLIC EqSat/include)
+target_link_libraries(Luau.EqSat PUBLIC Luau.Common)
+set_target_properties(Luau.EqSat PROPERTIES LINKER_LANGUAGE CXX)
 
 target_compile_features(Luau.CodeGen PRIVATE cxx_std_17)
 target_include_directories(Luau.CodeGen PUBLIC CodeGen/include)
@@ -141,6 +147,7 @@ endif()
 
 target_compile_options(Luau.Ast PRIVATE ${LUAU_OPTIONS})
 target_compile_options(Luau.Analysis PRIVATE ${LUAU_OPTIONS})
+target_compile_options(Luau.EqSat PRIVATE ${LUAU_OPTIONS})
 target_compile_options(Luau.CLI.lib PRIVATE ${LUAU_OPTIONS})
 target_compile_options(Luau.CodeGen PRIVATE ${LUAU_OPTIONS})
 target_compile_options(Luau.VM PRIVATE ${LUAU_OPTIONS})
@@ -260,16 +267,16 @@ if(LUAU_BUILD_WEB)
     target_link_options(Luau.Web PRIVATE -sSINGLE_FILE=1)
 endif()
 
-add_subdirectory(fuzz)
+# add_subdirectory(fuzz)
 
 # validate dependencies for internal libraries
-foreach(LIB Luau.Ast Luau.Compiler Luau.Config Luau.Analysis Luau.CodeGen Luau.VM)
+foreach(LIB Luau.Ast Luau.Compiler Luau.Config Luau.Analysis Luau.EqSat Luau.CodeGen Luau.VM)
     if(TARGET ${LIB})
         get_target_property(DEPENDS ${LIB} LINK_LIBRARIES)
         if(LIB MATCHES "CodeGen|VM" AND DEPENDS MATCHES "Ast|Analysis|Config|Compiler")
             message(FATAL_ERROR ${LIB} " is a runtime component but it depends on one of the offline components")
         endif()
-        if(LIB MATCHES "Ast|Analysis|Compiler" AND DEPENDS MATCHES "CodeGen|VM")
+        if(LIB MATCHES "Ast|Analysis|EqSat|Compiler" AND DEPENDS MATCHES "CodeGen|VM")
             message(FATAL_ERROR ${LIB} " is an offline component but it depends on one of the runtime components")
         endif()
         if(LIB MATCHES "Ast|Compiler" AND DEPENDS MATCHES "Analysis|Config")

EqSat/include/Luau/Id.h

@@ -0,0 +1,20 @@
+// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
+#pragma once
+
+namespace Luau::EqSat
+{
+
+struct Id final
+{
+    explicit Id(size_t id);
+
+    explicit operator size_t() const;
+
+    bool operator==(Id rhs) const;
+    bool operator!=(Id rhs) const;
+
+private:
+    size_t id;
+};
+
+} // namespace Luau::EqSat

EqSat/src/Id.cpp

@@ -0,0 +1,38 @@
+// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
+#include "Luau/Id.h"
+
+#include <functional>
+
+namespace Luau::EqSat
+{
+
+Id::Id(size_t id)
+    : id(id)
+{
+}
+
+Id::operator size_t() const
+{
+    return id;
+}
+
+bool Id::operator==(Id rhs) const
+{
+    return id == rhs.id;
+}
+
+bool Id::operator!=(Id rhs) const
+{
+    return id != rhs.id;
+}
+
+} // namespace Luau::EqSat
+
+template<>
+struct std::hash<Luau::EqSat::Id>
+{
+    size_t operator()(Luau::EqSat::Id id) const
+    {
+        return std::hash<size_t>()(size_t(id));
+    }
+};

Sources.cmake

@@ -295,6 +295,13 @@ target_sources(Luau.Analysis PRIVATE
     Analysis/src/Unifier2.cpp
 )
 
+# Luau.Analysis Sources
+target_sources(Luau.EqSat PRIVATE
+    EqSat/include/Luau/Id.h
+
+    EqSat/src/Id.cpp
+)
+
 # Luau.VM Sources
 target_sources(Luau.VM PRIVATE
     VM/include/lua.h

tests/EqSat.propositional.test.cpp

@@ -0,0 +1,8 @@
+// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
+#include <doctest.h>
+
+// Var, Bool, And, Or, Not, Implies
+
+TEST_SUITE_BEGIN("EqSatPropositionalLogic");
+
+TEST_SUITE_END();