feat(autogen): implement methods
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parent
879d92f145
commit
49dfeec18c
3 changed files with 204 additions and 18 deletions
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@ -15,7 +15,7 @@ static void processMethod(CXCursor cur, ClassAnalysis* state) {
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MethodAnalysis anly;
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auto result = parseAnnotationString(propertyDef.value());
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std::string symbolName = x_clang_toString(clang_getCursorDisplayName(cur));
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std::string symbolName = x_clang_toString(clang_getCursorSpelling(cur));
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CXType retType = clang_getCursorResultType(cur);
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anly.name = result["name"];
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@ -59,7 +59,7 @@ static void processProperty(CXCursor cur, ClassAnalysis* state) {
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PropertyAnalysis anly;
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auto result = parseAnnotationString(propertyDef.value());
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std::string symbolName = x_clang_toString(clang_getCursorDisplayName(cur));
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std::string symbolName = x_clang_toString(clang_getCursorSpelling(cur));
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CXType retType = clang_getCursorResultType(cur);
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anly.name = result["name"];
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@ -1,13 +1,30 @@
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#include "codegen.h"
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#include "analysis.h"
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#include <fstream>
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#include <map>
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#include <string>
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#include <variant>
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#include <vector>
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using namespace data;
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static std::map<std::string, std::string> MAPPED_TYPE = {
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{ "bool", "Data::Bool" },
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{ "int", "Data::Int" },
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{ "float", "Data::Float" },
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{ "std::string", "Data::String" },
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{ "glm::vec3", "Vector3" },
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};
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static std::map<std::string, std::string> LUA_CHECK_FUNCS = {
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{ "bool", "lua_toboolean" },
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{ "int", "luaL_checkinteger" },
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{ "float", "luaL_checknumber" },
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{ "std::string", "luaL_checkstring" },
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};
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static std::string getLuaMethodFqn(std::string className, std::string methodName) {
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return "__lua_impl_" + className + "__" + methodName;
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return "__lua_impl__" + className + "__" + methodName;
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}
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static void writeLuaLibraryGenerator(std::ofstream& out, ClassAnalysis& state) {
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@ -30,25 +47,193 @@ static void writeLuaLibraryGenerator(std::ofstream& out, ClassAnalysis& state) {
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<< " lua_setmetatable(L, n+1);\n";
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out << "}\n";
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}
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static std::string getMtName(std::string type) {
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if (type.starts_with("Data::"))
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return "__mt_" + type.substr(6);
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return "__mt_" + type;
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}
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static void writeLuaGetArgument(std::ofstream& out, std::string type, int narg) {
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std::string varname = "arg" + std::to_string(narg);
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std::string checkFunc = LUA_CHECK_FUNCS[type];
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if (checkFunc != "") {
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out << " " << type << " " << varname << " = " << checkFunc << "(L, " << std::to_string(narg) << ");\n";
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} else {
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std::string udataname = getMtName(type);
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out << " " << type << " " << varname << " = *(" << type << "*)luaL_checkudata(L, " << std::to_string(narg) << ", \"" << udataname << "\");\n";
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}
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}
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static void writeLuaMethodImpls(std::ofstream& out, ClassAnalysis& state) {
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std::string fqn = "Data::" + state.name;
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// Collect all method names to account for overloaded functions
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std::map<std::string, std::vector<MethodAnalysis>> methods;
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for (MethodAnalysis method : state.methods) {
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methods[method.name].push_back(method);
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}
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for (auto& [name, methodImpls] : methods) {
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std::string methodFqn = getLuaMethodFqn(state.name, name);
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out << "static int " << methodFqn << "(lua_State* L) {\n"
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" auto this__ = (Data::Base*)lua_touserdata(L, 1);\n"
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" if (&this__->GetType() != &" << fqn << "::TYPE) return luaL_typerror(L, 0, \"" << state.name << "\");\n"
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" " << fqn << "* this_ = (" << fqn << "*)this__;\n\n";
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// Currently overloads are not supported
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for (int i = 0; i < methodImpls[0].parameters.size(); i++) {
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writeLuaGetArgument(out, methodImpls[0].parameters[i].type, i);
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}
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// Store result
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if (methodImpls[0].returnType != "void")
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out << " " << methodImpls[0].returnType << " result = ";
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else
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out << " ";
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// Call function
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out << "this_->" << methodImpls[0].functionName << "(";
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for (int i = 0; i < methodImpls[0].parameters.size(); i++) {
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std::string varname = "arg" + std::to_string(i);
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if (i != 0) out << ", ";
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out << varname;
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}
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out << ");\n";
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// Return result
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if (methodImpls[0].returnType != "void") {
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std::string mappedType = MAPPED_TYPE[methodImpls[0].returnType];
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if (mappedType == "")
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out << " result.PushLuaValue(L);\n";
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else
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out << " " << mappedType << "(result).PushLuaValue(L);\n";
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}
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if (methodImpls[0].returnType == "void")
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out << " return 0;\n";
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else
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out << " return 1;\n";
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out << "}\n\n";
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}
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}
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static void writeLuaValueGenerator(std::ofstream& out, ClassAnalysis& state) {
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std::string fqn = "Data::" + state.name;
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out << "static int data_gc(lua_State*);\n"
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"static int data_index(lua_State*);\n"
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"static const struct luaL_Reg metatable [] = {\n"
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" {\"__gc\", data_gc},\n"
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" {\"__index\", data_index},\n"
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" {NULL, NULL} /* end of array */\n"
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"};\n\n";
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out << "void Data::" << state.name << "::PushLuaValue(lua_State* L) const {\n"
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" int n = lua_gettop(L);\n"
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// " // I'm torn... should this be Data::Variant, or Data::Base?\n"
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// " // If I ever decouple typing from Data::Base, I'll switch it to variant,\n"
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// " // otherwise, it doesn't make much sense to represent it as one\n"
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" " << fqn << "* userdata = (" << fqn << "*)lua_newuserdata(L, sizeof(" << fqn << "));\n"
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" new(userdata) " << fqn << "(*this);\n"
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" // Create the library's metatable\n"
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" luaL_newmetatable(L, \"__mt_" << state.name << "\");\n"
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" luaL_register(L, NULL, metatable);\n"
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" lua_setmetatable(L, n+1);\n"
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"}\n\n";
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// Indexing methods and properties
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out << "static int data_index(lua_State* L) {\n"
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" auto this__ = (Data::Base*)lua_touserdata(L, 1);\n"
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" if (&this__->GetType() != &" << fqn << "::TYPE) return luaL_typerror(L, 0, \"" << state.name << "\");\n"
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" " << fqn << "* this_ = (" << fqn << "*)this__;\n"
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"\n"
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" std::string key(lua_tostring(L, 2));\n"
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" lua_pop(L, 2);\n"
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"\n";
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out << " ";
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bool first = true;
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for (PropertyAnalysis prop : state.properties) {
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if (!first) out << " else ";
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first = false;
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out << "if (key == \"" << prop.name << "\") {\n";
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std::string type = MAPPED_TYPE[prop.valueType];
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if (type == "") type = prop.valueType;
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std::string valueExpr;
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if (prop.backingType == PropertyBackingType::Field)
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valueExpr = "this_->" + prop.backingSymbol;
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else if (prop.backingType == PropertyBackingType::Method)
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valueExpr = "this_->" + prop.backingSymbol + "()";
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// This largely depends on the type
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out << " " << type << "(" << valueExpr << ").PushLuaValue(L);\n";
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out << " return 1;\n";
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out << " }";
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}
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std::map<std::string, bool> accountedMethods;
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for (MethodAnalysis method : state.methods) {
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if (accountedMethods[method.name]) continue;
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if (!first) out << " else ";
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first = false;
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accountedMethods[method.name] = true;
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out << "if (key == \"" << method.name << "\") {\n";
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out << " lua_pushcfunction(L, " << getLuaMethodFqn(state.name, method.name) << ");\n";
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out << " return 1;\n";
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out << " }";
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}
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out << "\n\n"
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" return luaL_error(L, \"%s is not a valid member of %s\\n\", key.c_str(), \"" << state.name << "\");\n"
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"}\n\n";
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// Destructor
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out << "\nint data_gc(lua_State* L) {\n"
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" auto this_ = (" << fqn << "*)lua_touserdata(L, 1);\n"
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" delete this_;\n"
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" return 0;\n"
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"}\n\n";
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}
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void data::writeCodeForClass(std::ofstream& out, std::string headerPath, ClassAnalysis& state) {
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// std::string fqn = "Data::" + state.name;
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std::string fqn = "Data::" + state.name;
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// out << "#define __AUTOGEN_EXTRA_INCLUDES__\n";
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// out << "#include \"lua.h\"";
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// out << "#include \"" << headerPath << "\"\n\n";
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// out << "const Data::TypeInfo " << fqn << "::TYPE = {\n"
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// << " .name = \"" << fqn << "\",\n"
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// << " .deserializer = &" << fqn << "::Deserialize,\n"
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// << " .fromLuaValue = %" << fqn << "::FromLuaValue,\n"
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// << "};\n\n";
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out << "#define __AUTOGEN_EXTRA_INCLUDES__\n";
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out << "#include \"" << headerPath << "\"\n\n";
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out << "#include \"datatypes/meta.h\"\n";
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out << "#include \"lua.h\"\n\n";
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out << "const Data::TypeInfo " << fqn << "::TYPE = {\n"
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<< " .name = \"" << fqn << "\",\n"
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<< " .deserializer = &" << fqn << "::Deserialize,\n"
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<< " .fromLuaValue = &" << fqn << "::FromLuaValue,\n"
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<< "};\n\n";
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// out << "const Data::TypeInfo& " << fqn << "::GetType() {\n"
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// << " return &TYPE;\n"
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// << "};\n\n";
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out << "const Data::TypeInfo& " << fqn << "::GetType() const {\n"
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<< " return TYPE;\n"
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<< "};\n\n";
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// writeLuaLibraryGenerator(out, state);
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writeLuaMethodImpls(out, state);
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writeLuaValueGenerator(out, state);
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}
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@ -30,7 +30,8 @@ namespace Data {
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static Data::Variant Deserialize(pugi::xml_node node);
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static std::optional<Data::Variant> FromString(std::string);
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static result<Data::Variant, LuaCastError> FromLuaValue(lua_State*, int idx);
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virtual void PushLuaValue(lua_State*) const override;
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static void PushLuaLibrary(lua_State*);
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