mirror of
https://github.com/ton-blockchain/ton
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f3e620f48c
This commit introduces nullable types `T?` that are distinct from non-nullable `T`. Example: `int?` (int or null) and `int` are different now. Previously, `null` could be assigned to any primitive type. Now, it can be assigned only to `T?`. A non-null assertion operator `!` was also introduced, similar to `!` in TypeScript and `!!` in Kotlin. If `int?` still occupies 1 stack slot, `(int,int)?` and other nullable tensors occupy N+1 slots, the last for "null precedence". `v == null` actually compares that slot. Assigning `(int,int)` to `(int,int)?` implicitly creates a null presence slot. Assigning `null` to `(int,int)?` widens this null value to 3 slots. This is called "type transitioning". All stdlib functions prototypes have been updated to reflect whether they return/accept a nullable or a strict value. This commit also contains refactoring from `const FunctionData*` to `FunctionPtr` and similar.
109 lines
3.9 KiB
C++
109 lines
3.9 KiB
C++
/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "src-file.h"
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#include "symtable.h"
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#include "td/utils/Status.h"
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#include <functional>
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#include <set>
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#include <string>
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namespace tolk {
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// with cmd option -x, the user can pass experimental options to use
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class ExperimentalOption {
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friend struct CompilerSettings;
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const std::string_view name;
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bool enabled = false;
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const char* deprecated_from_v = nullptr; // when an option becomes deprecated (after the next compiler release),
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const char* deprecated_reason = nullptr; // but the user still passes it, we'll warn to stderr
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public:
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explicit ExperimentalOption(std::string_view name) : name(name) {}
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void mark_deprecated(const char* deprecated_from_v, const char* deprecated_reason);
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explicit operator bool() const { return enabled; }
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};
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// CompilerSettings contains settings that can be passed via cmd line or (partially) wasm envelope.
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// They are filled once at start and are immutable since the compilation started.
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struct CompilerSettings {
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enum class FsReadCallbackKind { Realpath, ReadFile };
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using FsReadCallback = std::function<td::Result<std::string>(FsReadCallbackKind, const char*)>;
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int verbosity = 0;
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int optimization_level = 2;
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bool stack_layout_comments = true;
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std::string output_filename;
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std::string boc_output_filename;
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std::string stdlib_folder; // a path to tolk-stdlib/; files imported via @stdlib/xxx are there
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FsReadCallback read_callback;
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ExperimentalOption remove_unused_functions{"remove-unused-functions"};
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void enable_experimental_option(std::string_view name);
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void parse_experimental_options_cmd_arg(const std::string& cmd_arg);
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};
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// AST nodes contain std::string_view referencing to contents of .tolk files (kept in memory after reading).
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// It's more than enough, except a situation when we create new AST nodes inside the compiler
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// and want some "persistent place" for std::string_view to point to.
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// This class copies strings to heap, so that they remain valid after closing scope.
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class PersistentHeapAllocator {
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struct ChunkInHeap {
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const char* allocated;
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std::unique_ptr<ChunkInHeap> next;
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ChunkInHeap(const char* allocated, std::unique_ptr<ChunkInHeap>&& next)
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: allocated(allocated), next(std::move(next)) {}
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};
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std::unique_ptr<ChunkInHeap> head = nullptr;
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public:
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std::string_view copy_string_to_persistent_memory(std::string_view str_in_tmp_memory);
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void clear();
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};
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// CompilerState contains a mutable state that is changed while the compilation is going on.
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// It's a "global state" of all compilation.
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// Historically, in FunC, this global state was spread along many global C++ variables.
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// Now, no global C++ variables except `CompilerState G` are present.
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struct CompilerState {
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CompilerSettings settings;
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GlobalSymbolTable symtable;
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PersistentHeapAllocator persistent_mem;
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std::vector<FunctionPtr> all_functions; // all user-defined (not built-in) functions, with generic instantiations
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std::vector<FunctionPtr> all_get_methods;
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std::vector<GlobalVarPtr> all_global_vars;
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std::vector<GlobalConstPtr> all_constants;
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AllRegisteredSrcFiles all_src_files;
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bool is_verbosity(int gt_eq) const { return settings.verbosity >= gt_eq; }
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};
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extern CompilerState G;
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} // namespace tolk
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