122 lines
3.3 KiB
C++
122 lines
3.3 KiB
C++
/* Dependency graph analysis.
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Copyright (C) 2025 Free Software Foundation, Inc.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "elna/boot/dependency.h"
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#include <fstream>
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#include <sstream>
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#include <string.h>
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#include "elna/boot/driver.h"
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#include "elna/boot/semantic.h"
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#include "parser.hh"
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namespace elna::boot
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{
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source_path_error::source_path_error(const std::string& message, const char *path)
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: error(path, { 0, 0 }), message(message)
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{
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}
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std::string source_path_error::what() const
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{
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std::stringstream output;
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output << "Cannot open filename ";
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output << this->path;
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output << ": ";
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output << this->message;
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return output.str();
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}
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dependency::dependency()
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{
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}
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dependency::dependency(error_list&& errors)
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: m_errors(std::move(errors))
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{
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}
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bool dependency::has_errors() const
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{
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return !errors().empty();
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}
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const error_list& dependency::errors() const
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{
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return m_errors;
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}
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dependency parse_source(std::istream& entry_point, const char *entry_path)
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{
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driver parse_driver{ entry_path };
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lexer tokenizer(entry_point);
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yy::parser parser(tokenizer, parse_driver);
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if (parser())
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{
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return dependency(std::move(parse_driver.errors()));
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}
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else
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{
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dependency outcome;
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std::swap(outcome.tree, parse_driver.tree);
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return outcome;
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}
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}
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dependency read_sources(const char *entry_path, std::shared_ptr<symbol_table> info_table,
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std::shared_ptr<symbol_table> imports)
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{
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std::ifstream entry_point{ entry_path, std::ios::in };
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if (!entry_point)
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{
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error_list errors;
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errors.push_back(std::make_unique<source_path_error>(strerror(errno), entry_path));
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return dependency(std::move(errors));
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}
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auto outcome = parse_source(entry_point, entry_path);
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declaration_visitor declaration_visitor(entry_path);
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outcome.tree->accept(&declaration_visitor);
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if (!declaration_visitor.errors().empty())
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{
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return dependency(std::move(declaration_visitor.errors()));
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}
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outcome.unresolved = declaration_visitor.unresolved;
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outcome.bag = symbol_bag{ std::move(declaration_visitor.unresolved), info_table };
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if (imports != nullptr)
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{
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outcome.bag.add_import(imports);
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}
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elna::boot::name_analysis_visitor name_analysis_visitor(entry_path, outcome.bag);
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outcome.tree->accept(&name_analysis_visitor);
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if (!name_analysis_visitor.errors().empty())
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{
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return dependency(std::move(declaration_visitor.errors()));
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}
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return outcome;
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}
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}
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