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• Safety Tips:QiqiZhang1029/2019-07-17-01<|file_sep|>/readme.txt Git is a distributed version control system. Git is free software. Git has a mutable index called stage. Git tracks changes. Creating a new branch is quick. Creating a new branch is quick AND simple. Fix bug<|file_sep|>#ifndef PARSER_H #define PARSER_H #include "token.h" #include "symbol.h" #include "exception.h" #include "abstract-syntax-tree.h" #include "ast-builder.h" #include "data-type.h" #include "env.h" class Parser { public: Parser(const std::vector& tokens); AstNodePtr parse(); private: const std::vector& tokens_; size_t pos_ = {0}; SymbolTable symbols_; AstBuilder ast_builder_; Token peek(); Token next(); void expect(TokenType type); AstNodePtr statement(); AstNodePtr expression(); AstNodePtr primary_expression(); AstNodePtr assignment_expression(); AstNodePtr postfix_expression(); AstNodePtr unary_expression(); AstNodePtr multiplicative_expression(); AstNodePtr additive_expression(); AstNodePtr shift_expression(); AstNodePtr relational_expression(); AstNodePtr equality_expression(); AstNodePtr logical_and_expression(); AstNodePtr logical_or_expression(); AstNodePtr conditional_expression(); }; #endif // PARSER_H <|file_sep|>#include "lexer.h" #include "char-iterator.h" #include "token.h" #include "exception.h" #include "lexer-error.h" using namespace std; Lexer::Lexer(const string& source) { char_iterator it(source.begin(), source.end()); while (!it.at_end()) { const char c = *it; if (is_whitespace(c)) { ++it; continue; } const auto result = read_token(it); if (!result.first) { throw LexerError(it.pos(), result.second); } tokens_.emplace_back(result.first); } } const vector& Lexer::tokens() const { return tokens_; } Lexer::TokenResult Lexer::read_token(char_iterator& it) { #define IS(c) (c == L##c) #define CASE(c) case L'c': return Token(TokenType::TK_##c), it.advance(1) #define CASE_RANGE(a,b) case L'a': case L'b': case L'c': ... case L'b': return Token(TokenType::TK_ID), it.advance(1) #define CASE_DIGIT case L'0': case L'1': case L'2': case L'3': case L'4': case L'5': case L'6': case L'7': case L'8': case L'9' #define CASE_LIT CASE(''') CASE('"') #define CASE_OP CASE('+') CASE('-') CASE('*') CASE('/') CASE('%') CASE('&') CASE('|') CASE('^') CASE('!') CASE('=') CASE('<') CASE('>') #define CASE_SEP CASE(';') CASE(':') CASE(',') CASE('.') CASE('(') CASE(')') CASE('{') CASE('}') #define CASE_ERR(c) default: return false, ErrorDesc{#c} #define READ_ID_OR_KEYWORD(it) { auto s = read_id(it); if (is_keyword(s)) return Token(keyword_type(s)), it; switch (*it) { case L' ': case L't': case L'r': case L'n': case L'f': ++it; break; READ_ID_OR_KEYWORD(it) READ_NUM(it) READ_STR(it) READ_CHAR(it) CASE_OP if (IS('/')) { if (IS('*')) { it.advance(2); while (true) { if (IS('*')) { if (IS('/')) { it.advance(2); break; } } ++it; } } else if (IS('/')) { while (true) { const auto c = *it; if (IS('n') || IS('r')) break; ++it; } } else return Token(TokenType::TK_SLASH), it.advance(1); } else return Token(TokenType::TK_OP), it.advance(1); CASE_SEP return Token(symbol_type(*it)), it.advance(1); default: return false, ErrorDesc{"Unexpected character: '" + string{1u, *it} + "'"}; } #undef IS #undef CASE #undef CASE_RANGE #undef CASE_DIGIT #undef CASE_LIT #undef CASE_OP #undef CASE_SEP #undef CASE_ERR #undef READ_ID_OR_KEYWORD #undef READ_NUM #undef READ_STR #undef READ_CHAR } string Lexer::read_id(char_iterator& it) { #define READ_ID_OR_KEYWORD(it) { auto s = read_id(it); READ_ID_OR_KEYWORD(it) auto s = read_chars(it); return s; } string Lexer::read_num(char_iterator& it) { #define READ_NUM(it) { READ_NUM(it) auto s = read_chars(it); auto dot_pos = s.find(L'.'); if (dot_pos != string::npos && dot_pos != s.size() -1) { throw LexerError(it.pos(), ErrorDesc{"Unexpected '.'"}); } auto exp_pos = s.find(L'e'); if (exp_pos != string::npos && exp_pos != s.size() -1) { throw LexerError(it.pos(), ErrorDesc{"Unexpected 'e'"}); } return s; } string Lexer::read_str(char_iterator& it) { #define READ_STR(it) { READ_STR(it) ++it; auto start_pos = it.pos(); auto s = read_chars([](wchar_t c){ return c != '"'; }, it); if (*it != '"') throw LexerError(start_pos, ErrorDesc{"Expected '"'"}); ++it; return '"' + s + '"'; } string Lexer::read_char(char_iterator& it) { #define READ_CHAR(it) { READ_CHAR(it) ++it; auto start_pos = it.pos(); auto c = *it; if (*it == ''') throw LexerError(start_pos, ErrorDesc{"Empty character constant"}); ++it; if (*it != ''') throw LexerError(start_pos, ErrorDesc{"Expected '''"}); ++it; return "'" + string{c} + "'"; } template string Lexer::read_chars(Pred pred, char_iterator& it) { string res; while (!it.at_end() && pred(*it)) { res.push_back(*it); ++it; } return res; } <|file_sep|>#include "env.h" using namespace std; Env::~Env() { } Env* Env::enclose() { Env* e = new Env(*this); return e; } SymbolTable Env::symbols() const { return symbols_; } Symbol* Env::find(const string& name) const { auto iter = symbols_.find(name); if (iter == symbols_.end()) return nullptr; return &iter->second; } <|file_sep|>#ifndef TOKEN_H #define TOKEN_H #include "exception.h" #include "data-type.h" enum class TokenType : uint8_t { // Literals TK_INT_LITERAL, TK_DOUBLE_LITERAL, TK_STRING_LITERAL, TK_CHAR_LITERAL, // Keywords TK_BREAK, TK_CASE, TK_CONTINUE, TK_DEFAULT, TK_DO, TK_ELSE, TK_ENUM, TK_EXTERN, TK_FOR, TK_GOTO, TK_IF, TK_INLINE, TK_INT, TK_LONG, TK_REGISTER, TK_RESTRICT, TK_RETURN, TK_SHORT, TK_SIGNED, TK_SIZEOF, TK_STATIC, TK_STRUCT, TK_SWITCH, TK_TYPEDEF, TK_UNION, TK_UNSIGNED, TK_VOID, TK_VOLATILE, // Operators // Binary operators: precedence from highest to lowest. // Highest precedence: * // Associativity: left-to-right. OP_MUL, OP_DIV, OP_MOD, // Lowest precedence: , // Associativity: left-to-right. OP_COMMA, // Unary operators: precedence from highest to lowest. // Highest precedence: ++ // Associativity: right-to-left. OP_INC, OP_DEC, OP_ADDR, OP_DEREF, OP_NOT, OP_NEG, OP_POS, OP_LOGIC_NOT, OP_LOGIC_AND, OP_LOGIC_OR, // Lowest precedence: . // Associativity: right-to-left. OP_DOT, // Symbols SYM_LPARENTHESIS, SYM_RPARENTHESIS, SYM_LBRACKET, SYM_RBRACKET, SYM_LBRACE, SYM_RBRACE, SYM_SEMICOLON, SYM_COMMA, SYM_DOTDOTDOT, SYM_COLON, SYM_QUESTIONMARK, SYMBOL_COUNT, // Other ID_TOKEN_TYPE, NUM_TOKEN_TYPE, STR_TOKEN_TYPE, CHAR_TOKEN_TYPE, SLASH_TOKEN_TYPE }; enum class SymbolType : uint8_t { SYMBOL_COUNT }; struct Token { Token(TokenType type); Token(TokenType type, int64_t int_value); Token(TokenType type, double double_value); Token(TokenType type, const string& str_value); Token(SymbolType type); TokenType type() const; int64_t int_value() const; double double_value() const; const string& str_value() const; SymbolType symbol_type() const; bool is_keyword() const; bool is_id_token() const; bool is_num_token() const; bool is_str_token() const; bool is_char_token() const; bool is_symbol() const; static bool is_symbol(TokenType type); static bool is_operator(TokenType type); static bool is_unary_operator(TokenType type); static bool is_binary_operator(TokenType type); static bool is_unary_precedence_higher_than( TokenType lhs_type, TokenType rhs_type); static bool is_binary_precedence_higher_than( TokenType lhs_type, TokenType rhs_type); }; inline std::ostream& operator<<(std::ostream& os, const Token& token) { switch (token.type()) { case TokenType::ID_TOKEN_TYPE: os << token.str_value(); break; case TokenType::NUM_TOKEN_TYPE: os << token.int_value(); break; case TokenType::STR_TOKEN_TYPE: os << token.str_value(); break; case TokenType::CHAR_TOKEN_TYPE: os << token.str_value(); break; default: os << token.type_name(); break; } return os; } inline std::istream& operator>>(std::istream& os, Token& token) { std::string str; os >> str; token = Token(str); return os; } #endif // TOKEN_H <|file_sep|>#ifndef AST_BUILDER_H #define AST_BUILDER_H #include "abstract-syntax-tree.h" #include "env.h" #include "symbol.h" class AstBuilder { public: AstBuilder(const SymbolTable& symbols); AstBuilder(const SymbolTable& symbols, Env* env); AstBuilder(const SymbolTable& symbols_parent_, Env* env_parent_); AstBuilder(const SymbolTable& symbols_parent_, Env* env_parent_, const SymbolTable& symbols_child_); AstBuilder(const SymbolTable& symbols_parent_, Env* env_parent_, Env* env_child_); void add_symbols(const SymbolTable& symbols); void set_env(Env* env); void set_env_child(Env* env_child_); void add_env_child(Env* env_child_); AstNodePtr program(); AstNodePtr statement_list(); AstNodePtr statement(); AstNodePtr expression_statement(); AstNodePtr selection_statement(); AstNodePtr iteration_statement(); AstNodePtr jump_statement(); AstNodePtr declaration_statement(); AstNodePtr block(); AstNodePtr compound_statement(); AstNodePtr declaration_list(); AstNodePtr declaration_specifiers(); AstNodePtr declaration_specifier(); AstNodePtr init_declarator_list(); AstNodePtr init_declarator(); AstNodePtr initializer(); AstNodePtr parameter_list(); AstNodePtr parameter_declaration(); AstNodePtr direct_declarator(); AstNodePtr abstract_declarator(); AstNodePtr pointer_opt(); AstNodePtr direct_abstract_declarator_opt(); AstNodePtr direct_abstract_declarator_part_list_opt(); AstNodePtr direct_abstract_declarator_part_opt(); AstNodePtr direct_abstract_declarator_part_sequence_opt(); AstNodeExpr(expression()); private: const SymbolTable& symbols_; Env* env_ = nullptr; Env* env_child_ = nullptr; }; #endif // AST_BUILDER_H <|repo_name|>siyuan-zhang/cpp-parser<|file_sep|>/cpp-parser/data-type.cpp #include "data-type.h" using namespace std; DataType DataTypeFromKeyword(string keyword) { for (size_t i=0; i