Michael Fabian 'Xaymar' Dirks
d5945e8c39
The Lexer should now be able to parse all existing Blitz code into easily identified Tokens. With this information, a Parser can now verify that the syntax was kept correctly, warn about possible dangerous or wrong use and convert the Tokens into actual LLVM code for compiling.
126 lines
2.8 KiB
C++
126 lines
2.8 KiB
C++
// Code Compiler for BlitzLLVM
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// Copyright(C) 2017 Michael Fabian Dirks
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//
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// This program 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 of the License, or
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// (at your option) any later version.
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//
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// This program 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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//
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// You should have received a copy of the GNU General Public License
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// along with this program.If not, see <https://www.gnu.org/licenses/>.
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#pragma once
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#include <list>
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#include <istream>
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#include <string>
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#include <inttypes.h>
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namespace BlitzLLVM {
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class Lexer {
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public:
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enum class Token : uint64_t {
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TokenUnknown,
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TokenEOF,
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TokenNewLine,
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// Symbols
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TokenPlus,
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TokenMinus,
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TokenSlashForward,
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TokenSlashBackward,
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TokenMultiply,
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TokenEqual,
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TokenOctothorp,
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TokenPercent,
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TokenDollar,
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TokenRoundBracketOpen,
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TokenRoundBracketClose,
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TokenSquareBracketOpen,
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TokenSquareBracketClose,
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TokenAngleBracketOpen,
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TokenAngleBracketClose,
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TokenDot,
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TokenColon,
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TokenComma,
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TokenSemicolon,
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TokenCaret,
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TokenBitNot /*~*/,
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// String Delimiter
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TokenDoubleQuote,
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// Types
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TokenText,
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TokenNumber,
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TokenDecimal,
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TokenQuotedText, // Text encapsulated by TokenDoubleQuote
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// Binary
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TokenNot,
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TokenAnd, TokenOr, TokenXor,
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TokenShl, TokenShr,
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TokenSar, TokenSal,
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TokenFalse, TokenTrue,
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// Conversion
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TokenFloat,
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TokenString, TokenHex,
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TokenInt,
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// Control
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TokenIf, TokenThen, TokenElseIf, TokenElse, TokenEndIf,
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TokenSelect, TokenCase, TokenDefault, // End Select = TokenEnd, TokenSelect.
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TokenGoto, TokenGosub,
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TokenReturn,
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TokenFunction, // End Function = TokenEnd, TokenFunction.
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TokenEnd,
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TokenStop /* DEBUGGER! Ignore in Release mode. */,
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// Loop
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TokenFor, TokenTo, TokenNext,
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TokenWhile, TokenWend,
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TokenRepeat, TokenUntil, TokenForever,
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TokenExit,
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// Math
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TokenAbs, TokenSign /*Sgn*/,
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TokenCos, TokenSin, TokenTan,
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TokenACos, TokenASin, TokenATan, TokenATan2,
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TokenLog, TokenLog10,
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TokenCeil, TokenFloor,
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TokenMod,
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TokenPi,
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TokenExp, TokenSqr,
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// Variables
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TokenConst,
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TokenGlobal,
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TokenLocal,
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// Including files.
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TokenInclude,
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};
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public:
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Lexer(std::istream& fs);
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~Lexer();
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std::pair<Token, std::string> GetNextToken();
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private:
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std::istream& m_fileStream;
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bool m_isTextMode = false;
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bool m_isNumberMode = false;
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bool m_isStringMode = false;
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bool m_numberModeHasDecimal = false;
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Token m_overrideToken = Token::TokenUnknown;
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std::string m_overrideText = "";
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};
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} |