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#include "yuescript/yue_compiler.h"
extern "C" {
#include "lua.h"
#include "lauxlib.h"
#include "lualib.h"
int luaopen_yue(lua_State* L);
} // extern "C"
static void openlibs(void* state) {
lua_State* L = static_cast<lua_State*>(state);
luaL_openlibs(L);
luaopen_yue(L);
luaL_requiref(L, "yue", luaopen_yue, 1);
lua_pop(L, 1);
}
#define YUE_ARGS nullptr,openlibs
#include <string_view>
using namespace std::string_view_literals;
#include <emscripten/bind.h>
using namespace emscripten;
struct YueResult
{
std::string codes;
std::string err;
};
YueResult tolua(const std::string& codes, bool reserveLineNumber = true, bool implicitReturnRoot = true, bool useSpaceOverTab = true) {
yue::YueConfig config;
config.reserveLineNumber = reserveLineNumber;
config.implicitReturnRoot = implicitReturnRoot;
config.useSpaceOverTab = useSpaceOverTab;
auto result = yue::YueCompiler{YUE_ARGS}.compile(codes, config);
return {result.codes, result.error};
}
std::string version() { return std::string(yue::version); }
#define _DEFER(code,line) std::shared_ptr<void> _defer_##line(nullptr, [&](auto){code;})
#define DEFER(code) _DEFER(code,__LINE__)
void pushYue(lua_State* L, std::string_view name) {
lua_getglobal(L, "package"); // package
lua_getfield(L, -1, "loaded"); // package loaded
lua_getfield(L, -1, "yue"); // package loaded yue
lua_pushlstring(L, &name.front(), name.size()); // package loaded yue name
lua_gettable(L, -2); // loaded[name], package loaded yue item
lua_insert(L, -4); // item package loaded yue
lua_pop(L, 3); // item
}
void pushOptions(lua_State* L, int lineOffset) {
lua_newtable(L);
lua_pushliteral(L, "lint_global");
lua_pushboolean(L, 0);
lua_rawset(L, -3);
lua_pushliteral(L, "implicit_return_root");
lua_pushboolean(L, 1);
lua_rawset(L, -3);
lua_pushliteral(L, "reserve_line_number");
lua_pushboolean(L, 1);
lua_rawset(L, -3);
lua_pushliteral(L, "space_over_tab");
lua_pushboolean(L, 0);
lua_rawset(L, -3);
lua_pushliteral(L, "same_module");
lua_pushboolean(L, 1);
lua_rawset(L, -3);
lua_pushliteral(L, "line_offset");
lua_pushinteger(L, lineOffset);
lua_rawset(L, -3);
}
std::string exec(const std::string& codes) {
lua_State* L = luaL_newstate();
openlibs(L);
DEFER(lua_close(L));
auto execStr = [&](const std::string& s) {
std::string result;
pushYue(L, "insert_loader"sv);
if (lua_pcall(L, 0, 0, 0) != 0) {
result += lua_tostring(L, -1);
result += '\n';
return result;
}
pushYue(L, "loadstring"sv);
lua_pushlstring(L, s.c_str(), s.size());
lua_pushliteral(L, "=(eval str)");
if (lua_pcall(L, 2, 2, 0) != 0) {
result += lua_tostring(L, -1);
result += '\n';
return result;
}
if (lua_isnil(L, -2) != 0) {
result += lua_tostring(L, -1);
result += '\n';
return result;
}
lua_pop(L, 1);
pushYue(L, "pcall"sv);
lua_insert(L, -2);
int last = lua_gettop(L) - 2;
if (lua_pcall(L, 1, LUA_MULTRET, 0) != 0) {
result = lua_tostring(L, -1);
result += '\n';
return result;
}
int cur = lua_gettop(L);
int retCount = cur - last;
bool success = lua_toboolean(L, -retCount) != 0;
if (success) {
if (retCount > 1) {
for (int i = 1; i < retCount; ++i) {
result += luaL_tolstring(L, -retCount + i, nullptr);
result += '\n';
lua_pop(L, 1);
}
}
} else {
result += lua_tostring(L, -1);
result += '\n';
}
return result;
};
execStr(R"yuescript(
_G.__output = {}
_G.print = (...)->
len = select "#", ...
strs = {}
for i = 1, len
strs[#strs + 1] = tostring select i, ...
_G.__output[#_G.__output + 1] = table.concat strs, "\n"
)yuescript");
std::string res2 = execStr(codes);
std::string res1 = execStr(R"yuescript(
res = table.concat _G.__output, "\n"
return res if res ~= ""
)yuescript");
if (res1.empty()) {
return res2;
} else {
if (res2.empty()) {
return res1;
} else {
return res1 + res2;
}
}
}
EMSCRIPTEN_BINDINGS(yue) {
value_array<YueResult>("YueResult")
.element(&YueResult::codes)
.element(&YueResult::err);
function("tolua", &tolua);
function("exec", &exec);
function("version", &version);
}
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