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#ifndef LEXER_H
#define LEXER_H
#include <vector>
#include <map>
#include <string>
enum TokenType
{
// Single character tokens
LEFT_PAREN = 1, // (
RIGHT_PAREN, // )
LEFT_BRACKET, // [
RIGHT_BRACKET, // ]
LEFT_CUR_BRAC, // {
RIGHT_CUR_BRAC, // }
PLUS, // +
MINUS, // -
MULTIPLICATION, // *
DIVIDE, // /
MODULO, // %
LESSER, // <
GREATER, // >
ASSIGN, // =
SEMI_COLON, // ;
QUESTION_MARK, // ?
EXCLAMATION_MARK, // !
COLON, // :
BITWISE_AND, // &
BITWISE_OR, // |
BITWISE_XOR, // ^
BITWISE_NOT, // ~
DOT, // .
// Double character tokens
SCOPE, // ::
PLUS_PLUS, // ++
MINUS_MINUS, // --
PTR_ARROW, // ->
LEFT_BITWISE_SHIFT, // <<
RIGHT_BITWISE_SHIFT,// >>
EQUAL, // ==
NOT_EQUAL, // !=
LESS_EQUAL, // <=
GREATER_EQUAL, // >=
LOGIC_AND, // &&
LOGIC_OR, // ||
MOD_EQUAL, // %=
MULT_EQUAL, // *=
DIV_EQUAL, // /=
PLUS_EQUAL, // +=
MINUS_EQUAL, // -=
BIT_AND_EQUAL, // &=
BIT_OR_EQUAL, // |=
BIT_XOR_EQUAL, // ^=
// Three character tokens
LEFT_SHIFT_EQUAL, // <<=
RIGHT_SHIFT_EQUAL, // >>=
// Keyword Tokens
ALIGNAS,
ALIGNOF,
AND,
AND_EQ,
ASM,
AUTO,
BITAND,
BITOR,
BOOL,
BREAK,
CASE,
CATCH,
CHAR,
CHAR16_T,
CHAR32_T,
CLASS,
COMPL,
CONST,
CONSTEXPR,
CONST_CAST,
CONTINUE,
DECLTYPE,
DEFAULT,
DELETE,
DO,
DOUBLE,
DYNAMIC_CAST,
ELSE,
ENUM,
EXPLICIT,
EXPORT,
EXTERN,
FALSE,
FLOAT,
FOR,
FRIEND,
GOTO,
IF,
INLINE,
INT,
LONG,
MUTABLE,
NAMESPACE,
NEW,
NOEXCEPT,
NOT,
NOT_EQ,
NULLPTR,
OPERATOR,
OR,
OR_EQ,
PRIVATE,
PROTECTED,
PUBLIC,
REGISTER,
REINTERPRET_CAST,
RETURN,
SHORT,
SIGNED,
SIZEOF,
STATIC,
STATIC_ASSERT,
STATIC_CAST,
STRUCT,
SWITCH,
TEMPLATE,
THIS,
THREAD_LOCAL,
THROW,
TRUE,
TRY,
TYPEDEF,
TYPEID,
TYPENAME,
UNION,
UNSIGNED,
USING,
VIRTUAL,
VOID,
VOLATILE,
WCHAR_T,
WHILE,
XOR,
XOR_EQ,
// preprocessors
PRE_DEFINE,
PRE_UNDEF,
PRE_INCLUDE,
PRE_IF,
PRE_IFDEF,
PRE_IFNDEF,
PRE_ELSE,
PRE_ELIF,
PRE_ENDIF,
PRE_LINE,
PRE_ERROR,
PRE_PRAGMA,
NUMBER,
IDENTIFIER,
STRING,
COMMENT,
Eof,
INVALID
};
enum State
{
FAIL,
SUCCESS,
ERROR
};
struct Token
{
TokenType type;
unsigned line;
std::string lexeme;
double value;
};
class Tokenizer
{
private:
const char* code;
unsigned line;
unsigned column;
unsigned codeIndex;
State state;
std::map<std::string, TokenType> keywords;
std::map<std::string, TokenType> preprocessors;
public:
Tokenizer(const char* code);
Token nextToken();
Token produceToken(TokenType type, std::string lexeme, double val = 0.0);
Token produceToken(TokenType type);
bool isAtEOF() const;
bool match(char c) const;
bool isStateError() const;
bool isStateSuccess() const;
bool tokenize(std::vector<Token> &tokens);
double parseNumber();
std::string parseComment();
std::string parseString();
Token parseKeyword();
Token parsePreprocessor();
std::string parseIdentifier();
void skipWhiteSpaces();
void nextSymbol();
void prevSymbol();
};
//#include "Lexer.cpp"
#endif
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