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799e2d1265
FunC's (and Tolk's before this PR) type system is based on Hindley-Milner.
This is a common approach for functional languages, where
types are inferred from usage through unification.
As a result, type declarations are not necessary:
() f(a,b) { return a+b; } // a and b now int, since `+` (int, int)
While this approach works for now, problems arise with the introduction
of new types like bool, where `!x` must handle both int and bool.
It will also become incompatible with int32 and other strict integers.
This will clash with structure methods, struggle with proper generics,
and become entirely impractical for union types.
This PR completely rewrites the type system targeting the future.
1) type of any expression is inferred and never changed
2) this is available because dependent expressions already inferred
3) forall completely removed, generic functions introduced
(they work like template functions actually, instantiated while inferring)
4) instantiation `<...>` syntax, example: `t.tupleAt<int>(0)`
5) `as` keyword, for example `t.tupleAt(0) as int`
6) methods binding is done along with type inferring, not before
("before", as worked previously, was always a wrong approach)
73 lines
2.5 KiB
C++
73 lines
2.5 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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#include "compiler-state.h"
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#include <iostream>
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#include <sstream>
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namespace tolk {
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CompilerState G; // the only mutable global variable in tolk internals
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void ExperimentalOption::mark_deprecated(const char* deprecated_from_v, const char* deprecated_reason) {
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this->deprecated_from_v = deprecated_from_v;
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this->deprecated_reason = deprecated_reason;
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}
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std::string_view PersistentHeapAllocator::copy_string_to_persistent_memory(std::string_view str_in_tmp_memory) {
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size_t len = str_in_tmp_memory.size();
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char* allocated = new char[len];
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memcpy(allocated, str_in_tmp_memory.data(), str_in_tmp_memory.size());
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auto new_chunk = std::make_unique<ChunkInHeap>(allocated, std::move(head));
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head = std::move(new_chunk);
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return {head->allocated, len};
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}
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void PersistentHeapAllocator::clear() {
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head = nullptr;
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}
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void CompilerSettings::enable_experimental_option(std::string_view name) {
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ExperimentalOption* to_enable = nullptr;
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if (name == remove_unused_functions.name) {
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to_enable = &remove_unused_functions;
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}
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if (to_enable == nullptr) {
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std::cerr << "unknown experimental option: " << name << std::endl;
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} else if (to_enable->deprecated_from_v) {
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std::cerr << "experimental option " << name << " "
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<< "is deprecated since Tolk v" << to_enable->deprecated_from_v
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<< ": " << to_enable->deprecated_reason << std::endl;
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} else {
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to_enable->enabled = true;
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}
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}
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void CompilerSettings::parse_experimental_options_cmd_arg(const std::string& cmd_arg) {
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std::istringstream stream(cmd_arg);
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std::string token;
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while (std::getline(stream, token, ',')) {
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enable_experimental_option(token);
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}
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}
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const std::vector<const FunctionData*>& get_all_not_builtin_functions() {
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return G.all_functions;
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}
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} // namespace tolk
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