mirror of
https://github.com/ton-blockchain/ton
synced 2025-03-09 15:40:10 +00:00
7bcb8b895f
With the introduction of nullable types, we want the compiler to be smart in cases like > if (x == null) return; > // x is int now or > if (x == null) x = 0; > // x is int now These are called smart casts: when the type of variable at particular usage might differ from its declaration. Implementing smart casts is very challenging. They are based on building control-flow graph and handling every AST vertex with care. Actually, I represent cfg not a as a "graph with edges". Instead, it's a "structured DFS" for the AST: 1) at every point of inferring, we have "current flow facts" 2) when we see an `if (...)`, we create two derived contexts 3) after `if`, finalize them at the end and unify 4) if we detect unreachable code, we mark that context In other words, we get the effect of a CFG but in a more direct approach. That's enough for AST-level data-flow. Smart casts work for local variables and tensor/tuple indices. Compilation errors have been reworked and now are more friendly. There are also compilation warnings for always true/false conditions inside if, assert, etc.
87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
/*
|
|
This file is part of TON Blockchain source code.
|
|
|
|
TON Blockchain is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
TON Blockchain is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with TON Blockchain. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
In addition, as a special exception, the copyright holders give permission
|
|
to link the code of portions of this program with the OpenSSL library.
|
|
You must obey the GNU General Public License in all respects for all
|
|
of the code used other than OpenSSL. If you modify file(s) with this
|
|
exception, you may extend this exception to your version of the file(s),
|
|
but you are not obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. If you delete this exception statement
|
|
from all source files in the program, then also delete it here.
|
|
*/
|
|
#include "tolk.h"
|
|
#include "pipeline.h"
|
|
#include "compiler-state.h"
|
|
#include "lexer.h"
|
|
#include "ast.h"
|
|
#include "type-system.h"
|
|
|
|
namespace tolk {
|
|
|
|
|
|
void on_assertion_failed(const char *description, const char *file_name, int line_number) {
|
|
std::string message = static_cast<std::string>("Assertion failed at ") + file_name + ":" + std::to_string(line_number) + ": " + description;
|
|
#ifdef TOLK_DEBUG
|
|
#ifdef __arm64__
|
|
// when developing, it's handy when the debugger stops on assertion failure (stacktraces and watches are available)
|
|
std::cerr << message << std::endl;
|
|
__builtin_debugtrap();
|
|
#endif
|
|
#endif
|
|
throw Fatal(std::move(message));
|
|
}
|
|
|
|
int tolk_proceed(const std::string &entrypoint_filename) {
|
|
type_system_init();
|
|
define_builtins();
|
|
lexer_init();
|
|
|
|
// on any error, an exception is thrown, and the message is printed out below
|
|
// (currently, only a single error can be printed)
|
|
try {
|
|
pipeline_discover_and_parse_sources("@stdlib/common.tolk", entrypoint_filename);
|
|
|
|
pipeline_register_global_symbols();
|
|
pipeline_resolve_identifiers_and_assign_symbols();
|
|
pipeline_calculate_rvalue_lvalue();
|
|
pipeline_infer_types_and_calls_and_fields();
|
|
pipeline_check_inferred_types();
|
|
pipeline_refine_lvalue_for_mutate_arguments();
|
|
pipeline_check_rvalue_lvalue();
|
|
pipeline_check_pure_impure_operations();
|
|
pipeline_constant_folding();
|
|
pipeline_optimize_boolean_expressions();
|
|
pipeline_convert_ast_to_legacy_Expr_Op();
|
|
|
|
pipeline_find_unused_symbols();
|
|
pipeline_generate_fif_output_to_std_cout();
|
|
|
|
return 0;
|
|
} catch (Fatal& fatal) {
|
|
std::cerr << "fatal: " << fatal << std::endl;
|
|
return 2;
|
|
} catch (ParseError& error) {
|
|
std::cerr << error << std::endl;
|
|
return 2;
|
|
} catch (UnexpectedASTNodeType& error) {
|
|
std::cerr << "fatal: " << error.what() << std::endl;
|
|
std::cerr << "It's a compiler bug, please report to developers" << std::endl;
|
|
return 2;
|
|
}
|
|
}
|
|
|
|
} // namespace tolk
|