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## What's Changed? This week we have an update with an implementation for one of the RFCs we had approved before, an improvement of the new type solver and a small Lua 5.1 C API compatibility improvement. * `@deprecated` attribute can now have a custom suggestion for a replacement and a reason message as described in [deprecated attribute parameters RFC](https://rfcs.luau.org/syntax-attribute-functions-deprecated.html) For example: ```luau @[deprecated {reason = "foo suffers from performance issues", use = "bar"}] local function foo() ... end -- Function 'foo' is deprecated, use 'bar' instead. foo suffers from performance issues foo() ``` * `lua_cpcall` C API function has been restored both for compatibility with Lua 5.1 and as a safe way to enter protected call environment to work with Luau C API functions that may error Instead of ``` if (!lua_checkstack(L, 2)) return -1; lua_pushcfunction(L, test, nullptr); lua_pushlightuserdata(L, context); int status = lua_pcall(L, 1, 0, 0); ``` you can simply do ``` int status = lua_cpcall(L, test, context); ``` * In Luau CLI, required module return values can now have any type ## New Type Solver - Additional improvements on type refinements used with external types should fix some reported false positive errors where types refined to `never` - Fixed an issue in recursive refinement types in a form of `t1 where t1 = refine<t1, _>` getting 'stuck' - Fixed an issue in subtyping of generic functions, it is now possible to assign `<T>(T, (T) -> T) -> T` to `(number, <X>(X) -> X) -> number` - Fixed an ICE caused by recursive types (Fixes #1686) - Added additional iteration and recursion limits to stop the type solver before system resources are used up ## Internal Contributors Co-authored-by: Andy Friesen <afriesen@roblox.com> Co-authored-by: Annie Tang <annietang@roblox.com> Co-authored-by: Ariel Weiss <aaronweiss@roblox.com> Co-authored-by: Hunter Goldstein <hgoldstein@roblox.com> Co-authored-by: Ilya Rezvov <irezvov@roblox.com> Co-authored-by: Sora Kanosue <skanosue@roblox.com> Co-authored-by: Vighnesh Vijay <vvijay@roblox.com> Co-authored-by: Vyacheslav Egorov <vegorov@roblox.com>
33 lines
883 B
C++
33 lines
883 B
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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#pragma once
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#include "Luau/Location.h"
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#include "Luau/ParseOptions.h"
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#include "Luau/ParseResult.h"
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#include <string>
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namespace Luau
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{
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class AstNode;
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class AstStatBlock;
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struct TranspileResult
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{
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std::string code;
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Location errorLocation;
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std::string parseError; // Nonempty if the transpile failed
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};
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std::string toString(AstNode* node);
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void dump(AstNode* node);
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// Never fails on a well-formed AST
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std::string transpile(AstStatBlock& ast);
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std::string transpileWithTypes(AstStatBlock& block);
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std::string transpileWithTypes(AstStatBlock &block, const CstNodeMap& cstNodeMap);
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// Only fails when parsing fails
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TranspileResult transpile(std::string_view source, ParseOptions options = ParseOptions{}, bool withTypes = false);
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} // namespace Luau
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