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68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
/**
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* lisp-compiler: Compiles LISP using LLVM.
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* Copyright (C) 2022 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @file parser.hpp
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* @brief Source code parser to produce AST.
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*/
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#ifndef PARSER_HPP
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#define PARSER_HPP
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#include "ast.hpp"
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#include "state.hpp"
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#include <deque>
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#include <optional>
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#include <string>
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#include <variant>
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class Parser {
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public:
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enum Error {
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None,
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ExpectedProcedure,
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ExpectedIdentifier,
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ExpectedProcedureCallClose,
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ExpectedArgumentList,
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UnknownIdentifier,
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InvalidOperator,
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InvalidOperand,
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};
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void addString(const std::string& str);
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void consumeWhitespace();
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std::optional<std::string> consumeIdentifier();
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std::optional<std::variant<int, double>> consumeLiteralNumber();
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AST::Node *parse(CompilerState&);
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private:
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std::deque<char> text;
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Error lastError = None;
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AST::Node *parseExpression();
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AST::Node *parseProcedureCall();
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AST::Node *parseConditional();
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AST::Node *parseDefinition();
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AST::Node *parseAssignment();
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AST::Node *parseLambdaExpression();
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};
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#endif // PARSER_HPP
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