mirror of
https://github.com/luau-lang/luau.git
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951 lines
22 KiB
C++
951 lines
22 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "luau.pb.h"
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static const std::string kNames[] = {
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"_G",
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"_LOADED",
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"_VERSION",
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"__add",
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"__call",
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"__concat",
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"__div",
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"__eq",
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"__index",
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"__le",
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"__len",
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"__lt",
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"__mod",
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"__mode",
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"__mul",
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"__namecall",
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"__newindex",
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"__pow",
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"__sub",
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"__type",
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"__unm",
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"abs",
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"acos",
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"arshift",
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"asin",
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"assert",
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"atan",
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"atan2",
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"band",
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"bit32",
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"bnot",
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"boolean",
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"bor",
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"btest",
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"bxor",
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"byte",
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"ceil",
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"char",
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"charpattern",
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"clock",
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"codepoint",
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"codes",
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"concat",
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"coroutine",
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"cos",
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"cosh",
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"create",
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"date",
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"debug",
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"deg",
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"difftime",
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"error",
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"exp",
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"extract",
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"find",
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"floor",
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"fmod",
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"foreach",
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"foreachi",
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"format",
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"frexp",
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"function",
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"gcinfo",
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"getfenv",
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"getinfo",
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"getmetatable",
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"getn",
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"gmatch",
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"gsub",
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"huge",
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"insert",
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"ipairs",
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"isyieldable",
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"ldexp",
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"len",
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"loadstring",
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"log",
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"log10",
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"lower",
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"lrotate",
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"lshift",
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"match",
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"math",
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"max",
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"maxn",
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"min",
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"modf",
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"move",
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"newproxy",
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"next",
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"nil",
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"number",
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"offset",
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"os",
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"pack",
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"packsize",
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"pairs",
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"pcall",
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"pi",
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"pow",
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"print",
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"rad",
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"random",
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"randomseed",
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"rawequal",
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"rawget",
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"rawset",
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"remove",
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"rep",
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"replace",
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"require",
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"resume",
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"reverse",
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"rrotate",
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"rshift",
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"running",
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"select",
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"setfenv",
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"setmetatable",
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"sin",
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"sinh",
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"sort",
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"split",
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"sqrt",
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"status",
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"stdin",
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"string",
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"sub",
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"table",
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"tan",
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"tanh",
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"thread",
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"time",
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"tonumber",
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"tostring",
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"traceback",
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"type",
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"typeof",
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"unpack",
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"upper",
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"userdata",
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"utf8",
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"vector",
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"wrap",
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"xpcall",
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"yield",
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};
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static const std::string kTypes[] = {
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"any",
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"nil",
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"number",
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"string",
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"boolean",
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"thread",
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};
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static const std::string kClasses[] = {
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"Vector3",
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"Instance",
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"Part",
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};
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struct ProtoToLuau
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{
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struct Function
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{
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int loops = 0;
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bool vararg = false;
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};
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std::string source;
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std::vector<Function> functions;
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bool types = false;
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ProtoToLuau()
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{
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Function top = {};
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top.vararg = true;
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functions.push_back(top);
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}
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void ident(const luau::Name& name)
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{
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if (name.has_builtin())
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{
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size_t index = size_t(name.builtin()) % std::size(kNames);
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source += kNames[index];
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}
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else if (name.has_custom())
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{
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source += 'n';
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source += std::to_string(name.custom() & 0xff);
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}
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else
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{
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source += '_';
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}
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}
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void ident(const luau::Typename& name)
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{
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source += 't';
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source += std::to_string(name.index() & 0xff);
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}
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void print(const luau::Expr& expr)
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{
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if (expr.has_group())
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print(expr.group());
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else if (expr.has_nil())
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print(expr.nil());
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else if (expr.has_bool_())
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print(expr.bool_());
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else if (expr.has_number())
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print(expr.number());
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else if (expr.has_string())
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print(expr.string());
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else if (expr.has_local())
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print(expr.local());
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else if (expr.has_global())
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print(expr.global());
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else if (expr.has_varargs())
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print(expr.varargs());
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else if (expr.has_call())
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print(expr.call());
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else if (expr.has_index_name())
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print(expr.index_name());
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else if (expr.has_index_expr())
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print(expr.index_expr());
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else if (expr.has_function())
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print(expr.function());
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else if (expr.has_table())
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print(expr.table());
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else if (expr.has_unary())
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print(expr.unary());
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else if (expr.has_binary())
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print(expr.binary());
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else
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source += "_";
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}
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void print(const luau::ExprPrefix& expr)
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{
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if (expr.has_group())
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print(expr.group());
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else if (expr.has_local())
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print(expr.local());
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else if (expr.has_global())
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print(expr.global());
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else if (expr.has_call())
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print(expr.call());
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else if (expr.has_index_name())
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print(expr.index_name());
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else if (expr.has_index_expr())
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print(expr.index_expr());
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else
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source += "_";
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}
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void print(const luau::ExprGroup& expr)
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{
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source += '(';
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print(expr.expr());
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source += ')';
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}
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void print(const luau::ExprConstantNil& expr)
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{
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source += "nil";
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}
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void print(const luau::ExprConstantBool& expr)
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{
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source += expr.val() ? "true" : "false";
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}
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void print(const luau::ExprConstantNumber& expr)
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{
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source += std::to_string(expr.val());
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}
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void print(const luau::ExprConstantString& expr)
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{
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source += '"';
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for (char ch : expr.val())
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if (isalpha(ch))
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source += ch;
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source += '"';
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}
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void print(const luau::Local& var)
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{
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source += 'l';
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source += std::to_string(var.name() & 0xff);
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}
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void print(const luau::ExprLocal& expr)
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{
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print(expr.var());
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}
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void print(const luau::ExprGlobal& expr)
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{
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ident(expr.name());
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}
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void print(const luau::ExprVarargs& expr)
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{
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if (functions.back().vararg)
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source += "...";
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else
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source += "_";
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}
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void print(const luau::ExprCall& expr)
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{
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if (expr.func().has_index_name())
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print(expr.func().index_name(), expr.self());
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else
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print(expr.func());
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source += '(';
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for (int i = 0; i < expr.args_size(); ++i)
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{
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if (i != 0)
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source += ',';
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print(expr.args(i));
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}
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source += ')';
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}
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void print(const luau::ExprIndexName& expr, bool self = false)
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{
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print(expr.expr());
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source += self ? ':' : '.';
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ident(expr.index());
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}
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void print(const luau::ExprIndexExpr& expr)
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{
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print(expr.expr());
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source += '[';
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print(expr.index());
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source += ']';
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}
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void function(const luau::ExprFunction& expr)
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{
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source += "(";
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for (int i = 0; i < expr.args_size(); ++i)
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{
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if (i != 0)
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source += ',';
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print(expr.args(i));
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if (types && i < expr.types_size())
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{
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source += ':';
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print(expr.types(i));
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}
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}
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if (expr.vararg())
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{
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if (expr.args_size())
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source += ',';
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source += "...";
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}
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source += ')';
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if (types && expr.rettypes_size())
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{
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source += ':';
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if (expr.rettypes_size() > 1)
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source += '(';
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for (size_t i = 0; i < expr.rettypes_size(); ++i)
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{
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if (i != 0)
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source += ',';
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print(expr.rettypes(i));
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}
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if (expr.rettypes_size() > 1)
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source += ')';
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}
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source += '\n';
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Function func = {};
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func.vararg = expr.vararg();
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functions.push_back(func);
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print(expr.body());
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functions.pop_back();
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source += "end";
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}
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void print(const luau::ExprFunction& expr)
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{
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source += "function";
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function(expr);
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}
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void print(const luau::ExprTable& expr)
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{
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source += '{';
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for (int i = 0; i < expr.items_size(); ++i)
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{
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if (expr.items(i).has_key_name())
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{
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ident(expr.items(i).key_name());
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source += '=';
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}
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else if (expr.items(i).has_key_expr())
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{
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source += "[";
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print(expr.items(i).key_expr());
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source += "]=";
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}
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print(expr.items(i).value());
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source += ',';
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}
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source += '}';
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}
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void print(const luau::ExprUnary& expr)
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{
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if (expr.op() == luau::ExprUnary::Not)
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source += "not ";
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else if (expr.op() == luau::ExprUnary::Minus)
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source += "- ";
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else if (expr.op() == luau::ExprUnary::Len)
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source += "# ";
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print(expr.expr());
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}
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void print(const luau::ExprBinary& expr)
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{
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print(expr.left());
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if (expr.op() == luau::ExprBinary::Add)
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source += " + ";
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else if (expr.op() == luau::ExprBinary::Sub)
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source += " - ";
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else if (expr.op() == luau::ExprBinary::Mul)
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source += " * ";
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else if (expr.op() == luau::ExprBinary::Div)
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source += " / ";
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else if (expr.op() == luau::ExprBinary::Mod)
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source += " % ";
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else if (expr.op() == luau::ExprBinary::Pow)
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source += " ^ ";
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else if (expr.op() == luau::ExprBinary::Concat)
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source += " .. ";
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else if (expr.op() == luau::ExprBinary::CompareNe)
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source += " ~= ";
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else if (expr.op() == luau::ExprBinary::CompareEq)
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source += " == ";
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else if (expr.op() == luau::ExprBinary::CompareLt)
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source += " < ";
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else if (expr.op() == luau::ExprBinary::CompareLe)
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source += " <= ";
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else if (expr.op() == luau::ExprBinary::CompareGt)
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source += " > ";
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else if (expr.op() == luau::ExprBinary::CompareGe)
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source += " >= ";
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else if (expr.op() == luau::ExprBinary::And)
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source += " and ";
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else if (expr.op() == luau::ExprBinary::Or)
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source += " or ";
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print(expr.right());
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}
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void print(const luau::LValue& expr)
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{
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if (expr.has_local())
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print(expr.local());
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else if (expr.has_global())
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print(expr.global());
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else if (expr.has_index_name())
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print(expr.index_name());
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else if (expr.has_index_expr())
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print(expr.index_expr());
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else
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source += "_";
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}
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void print(const luau::Stat& stat)
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{
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if (stat.has_block())
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print(stat.block());
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else if (stat.has_if_())
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print(stat.if_());
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else if (stat.has_while_())
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print(stat.while_());
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else if (stat.has_repeat())
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print(stat.repeat());
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else if (stat.has_break_())
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print(stat.break_());
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else if (stat.has_continue_())
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print(stat.continue_());
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else if (stat.has_return_())
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print(stat.return_());
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else if (stat.has_call())
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print(stat.call());
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else if (stat.has_local())
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print(stat.local());
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else if (stat.has_for_())
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print(stat.for_());
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else if (stat.has_for_in())
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print(stat.for_in());
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else if (stat.has_assign())
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print(stat.assign());
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else if (stat.has_compound_assign())
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print(stat.compound_assign());
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else if (stat.has_function())
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print(stat.function());
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else if (stat.has_local_function())
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print(stat.local_function());
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else if (stat.has_type_alias())
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print(stat.type_alias());
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else
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source += "do end\n";
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}
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void print(const luau::StatBlock& stat)
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{
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for (int i = 0; i < stat.body_size(); ++i)
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{
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if (stat.body(i).has_block())
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{
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source += "do\n";
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print(stat.body(i));
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source += "end\n";
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}
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else
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{
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print(stat.body(i));
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// parser will reject code with break/continue/return being non-trailing statements in a block
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if (stat.body(i).has_break_() || stat.body(i).has_continue_() || stat.body(i).has_return_())
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break;
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}
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}
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}
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void print(const luau::StatIf& stat)
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{
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source += "if ";
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print(stat.cond());
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source += " then\n";
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print(stat.then());
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if (stat.has_else_())
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{
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source += "else\n";
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print(stat.else_());
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source += "end\n";
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}
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else if (stat.has_elseif())
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{
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source += "else";
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print(stat.elseif());
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}
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else
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{
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source += "end\n";
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}
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}
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void print(const luau::StatWhile& stat)
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{
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source += "while ";
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print(stat.cond());
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source += " do\n";
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functions.back().loops++;
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print(stat.body());
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functions.back().loops--;
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source += "end\n";
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}
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void print(const luau::StatRepeat& stat)
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{
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source += "repeat\n";
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functions.back().loops++;
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print(stat.body());
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functions.back().loops--;
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source += "until ";
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print(stat.cond());
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source += "\n";
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}
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void print(const luau::StatBreak& stat)
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{
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if (functions.back().loops)
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source += "break\n";
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else
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source += "do end\n";
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}
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void print(const luau::StatContinue& stat)
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{
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if (functions.back().loops)
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source += "continue\n";
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else
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source += "do end\n";
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}
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void print(const luau::StatReturn& stat)
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|
{
|
|
source += "return ";
|
|
for (int i = 0; i < stat.list_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.list(i));
|
|
}
|
|
source += "\n";
|
|
}
|
|
|
|
void print(const luau::StatCall& stat)
|
|
{
|
|
print(stat.expr());
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatLocal& stat)
|
|
{
|
|
source += "local ";
|
|
|
|
if (stat.vars_size() == 0)
|
|
source += '_';
|
|
|
|
for (int i = 0; i < stat.vars_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.vars(i));
|
|
|
|
if (types && i < stat.types_size())
|
|
{
|
|
source += ':';
|
|
print(stat.types(i));
|
|
}
|
|
}
|
|
|
|
if (stat.values_size() != 0)
|
|
source += " = ";
|
|
|
|
for (int i = 0; i < stat.values_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.values(i));
|
|
}
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatFor& stat)
|
|
{
|
|
source += "for ";
|
|
print(stat.var());
|
|
source += '=';
|
|
print(stat.from());
|
|
source += ',';
|
|
print(stat.to());
|
|
if (stat.has_step())
|
|
{
|
|
source += ',';
|
|
print(stat.step());
|
|
}
|
|
source += " do\n";
|
|
|
|
functions.back().loops++;
|
|
print(stat.body());
|
|
functions.back().loops--;
|
|
|
|
source += "end\n";
|
|
}
|
|
|
|
void print(const luau::StatForIn& stat)
|
|
{
|
|
source += "for ";
|
|
|
|
if (stat.vars_size() == 0)
|
|
source += '_';
|
|
|
|
for (int i = 0; i < stat.vars_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.vars(i));
|
|
}
|
|
|
|
source += " in ";
|
|
|
|
if (stat.values_size() == 0)
|
|
source += "...";
|
|
|
|
for (int i = 0; i < stat.values_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.values(i));
|
|
}
|
|
|
|
source += " do\n";
|
|
|
|
functions.back().loops++;
|
|
print(stat.body());
|
|
functions.back().loops--;
|
|
|
|
source += "end\n";
|
|
}
|
|
|
|
void print(const luau::StatAssign& stat)
|
|
{
|
|
if (stat.vars_size() == 0)
|
|
source += '_';
|
|
|
|
for (int i = 0; i < stat.vars_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.vars(i));
|
|
}
|
|
|
|
source += " = ";
|
|
|
|
if (stat.values_size() == 0)
|
|
source += "nil";
|
|
|
|
for (int i = 0; i < stat.values_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(stat.values(i));
|
|
}
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatCompoundAssign& stat)
|
|
{
|
|
print(stat.var());
|
|
|
|
if (stat.op() == luau::StatCompoundAssign::Add)
|
|
source += " += ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Sub)
|
|
source += " -= ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Mul)
|
|
source += " *= ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Div)
|
|
source += " /= ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Mod)
|
|
source += " %= ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Pow)
|
|
source += " ^= ";
|
|
else if (stat.op() == luau::StatCompoundAssign::Concat)
|
|
source += " ..= ";
|
|
|
|
print(stat.value());
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatFunction& stat)
|
|
{
|
|
source += "function ";
|
|
if (stat.var().has_index_name())
|
|
print(stat.var().index_name(), stat.self());
|
|
else if (stat.var().has_index_expr())
|
|
source += '_'; // function foo[bar]() is invalid syntax
|
|
else
|
|
print(stat.var());
|
|
function(stat.func());
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatLocalFunction& stat)
|
|
{
|
|
source += "local function ";
|
|
print(stat.var());
|
|
function(stat.func());
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::StatTypeAlias& stat)
|
|
{
|
|
source += "type ";
|
|
ident(stat.name());
|
|
|
|
if (stat.generics_size())
|
|
{
|
|
source += '<';
|
|
for (size_t i = 0; i < stat.generics_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
ident(stat.generics(i));
|
|
}
|
|
source += '>';
|
|
}
|
|
|
|
source += " = ";
|
|
print(stat.type());
|
|
source += '\n';
|
|
}
|
|
|
|
void print(const luau::Type& type)
|
|
{
|
|
if (type.has_primitive())
|
|
print(type.primitive());
|
|
else if (type.has_literal())
|
|
print(type.literal());
|
|
else if (type.has_table())
|
|
print(type.table());
|
|
else if (type.has_function())
|
|
print(type.function());
|
|
else if (type.has_typeof())
|
|
print(type.typeof());
|
|
else if (type.has_union_())
|
|
print(type.union_());
|
|
else if (type.has_intersection())
|
|
print(type.intersection());
|
|
else if (type.has_class_())
|
|
print(type.class_());
|
|
else if (type.has_ref())
|
|
print(type.ref());
|
|
else
|
|
source += "any";
|
|
}
|
|
|
|
void print(const luau::TypePrimitive& type)
|
|
{
|
|
size_t index = size_t(type.kind()) % std::size(kTypes);
|
|
source += kTypes[index];
|
|
}
|
|
|
|
void print(const luau::TypeLiteral& type)
|
|
{
|
|
ident(type.name());
|
|
|
|
if (type.generics_size())
|
|
{
|
|
source += '<';
|
|
for (size_t i = 0; i < type.generics_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
ident(type.generics(i));
|
|
}
|
|
source += '>';
|
|
}
|
|
}
|
|
|
|
void print(const luau::TypeTable& type)
|
|
{
|
|
source += '{';
|
|
for (size_t i = 0; i < type.items_size(); ++i)
|
|
{
|
|
ident(type.items(i).key());
|
|
source += ':';
|
|
print(type.items(i).type());
|
|
source += ',';
|
|
}
|
|
if (type.has_indexer())
|
|
{
|
|
source += '[';
|
|
print(type.indexer().key());
|
|
source += "]:";
|
|
print(type.indexer().value());
|
|
}
|
|
source += '}';
|
|
}
|
|
|
|
void print(const luau::TypeFunction& type)
|
|
{
|
|
source += '(';
|
|
for (size_t i = 0; i < type.args_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(type.args(i));
|
|
}
|
|
source += ")->";
|
|
if (type.rets_size() != 1)
|
|
source += '(';
|
|
for (size_t i = 0; i < type.rets_size(); ++i)
|
|
{
|
|
if (i != 0)
|
|
source += ',';
|
|
print(type.rets(i));
|
|
}
|
|
if (type.rets_size() != 1)
|
|
source += ')';
|
|
}
|
|
|
|
void print(const luau::TypeTypeof& type)
|
|
{
|
|
source += "typeof(";
|
|
print(type.expr());
|
|
source += ')';
|
|
}
|
|
|
|
void print(const luau::TypeUnion& type)
|
|
{
|
|
source += '(';
|
|
print(type.left());
|
|
source += ")|(";
|
|
print(type.right());
|
|
source += ')';
|
|
}
|
|
|
|
void print(const luau::TypeIntersection& type)
|
|
{
|
|
source += '(';
|
|
print(type.left());
|
|
source += ")&(";
|
|
print(type.right());
|
|
source += ')';
|
|
}
|
|
|
|
void print(const luau::TypeClass& type)
|
|
{
|
|
size_t index = size_t(type.kind()) % std::size(kClasses);
|
|
source += kClasses[index];
|
|
}
|
|
|
|
void print(const luau::TypeRef& type)
|
|
{
|
|
print(type.prefix());
|
|
source += '.';
|
|
ident(type.index());
|
|
}
|
|
};
|
|
|
|
std::string protoprint(const luau::StatBlock& stat, bool types)
|
|
{
|
|
ProtoToLuau printer;
|
|
printer.types = types;
|
|
printer.print(stat);
|
|
return printer.source;
|
|
}
|