82 lines
2.5 KiB
C++
82 lines
2.5 KiB
C++
#ifndef OBELISK_PARSER_H
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#define OBELISK_PARSER_H
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#include "ast/expression_ast.h"
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#include "ast/function_ast.h"
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#include "ast/prototype_ast.h"
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#include "knowledge_base.h"
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#include "lexer.h"
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#include "models/fact.h"
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#include <memory>
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namespace obelisk
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{
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class Parser
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{
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private:
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std::unique_ptr<obelisk::Lexer> lexer_;
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int currentToken_;
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void setCurrentToken(int currentToken);
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std::unique_ptr<obelisk::ExpressionAST> logError(const char* str);
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std::unique_ptr<obelisk::PrototypeAST> logErrorPrototype(
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const char* str);
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std::unique_ptr<obelisk::ExpressionAST> parseExpression();
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std::unique_ptr<obelisk::ExpressionAST> parseNumberExpression();
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std::unique_ptr<obelisk::ExpressionAST>
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parseParenthesisExpression();
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std::unique_ptr<obelisk::ExpressionAST> parseIdentifierExpression();
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std::unique_ptr<obelisk::ExpressionAST> parsePrimary();
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std::unique_ptr<obelisk::PrototypeAST> parsePrototype();
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std::unique_ptr<obelisk::FunctionAST> parseDefinition();
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std::unique_ptr<obelisk::FunctionAST> parseTopLevelExpression();
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std::unique_ptr<obelisk::PrototypeAST> parseExtern();
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std::unique_ptr<obelisk::ExpressionAST> parseAction();
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std::unique_ptr<obelisk::ExpressionAST> parseRule();
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void parseFact(std::vector<obelisk::Fact>& facts);
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public:
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Parser();
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std::unique_ptr<obelisk::Lexer>& getLexer();
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int getCurrentToken();
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int getNextToken();
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void handleDefinition();
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void handleExtern();
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void handleTopLevelExpression();
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void handleAction(std::unique_ptr<obelisk::KnowledgeBase>& kb);
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void handleRule(std::unique_ptr<obelisk::KnowledgeBase>& kb);
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void handleFact(std::unique_ptr<obelisk::KnowledgeBase>& kb);
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};
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class ParserException : public std::exception
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{
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private:
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const std::string errorMessage_;
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public:
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ParserException() :
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errorMessage_("an unknown error ocurred")
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{
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}
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ParserException(const std::string& errorMessage) :
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errorMessage_(errorMessage)
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{
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}
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const char* what() const noexcept
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{
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return errorMessage_.c_str();
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}
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};
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} // namespace obelisk
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#endif
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