llvm-tutorial/source/Lexer.h

#ifndef _LEXER_H
#define _LEXER_H

// Standard includes
#include <string>

// LLVM includes
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/DIBuilder.h"

// Local includes
//#include "Ast.h"

namespace lexer {
// The lexer returns tokens [0-255] if it is an unknown character, otherwise one
// of these for known things.
enum Token {
  tok_eof = -1,

  // commands
  tok_def = -2,
  tok_extern = -3,

  // primary
  tok_identifier = -4,
  tok_number = -5,

  // control
  tok_if = -6,
  tok_then = -7,
  tok_else = -8,
  tok_for = -9,
  tok_in = -10,
  // operators
  tok_binary = -11,
  tok_unary = -12,
  // var definition
  tok_var = -13
};

//static llvm::IRBuilder<> ast::AstObjects::Builder(getGlobalContext());

struct SourceLocation {
  int Line;
  int Col;
};

static SourceLocation CurLoc;
static SourceLocation LexLoc = {1, 0};

static int advance();

struct LexerObjects {
public:
  static std::string IdentifierStr; // Filled in if tok_identifier
  static double NumVal;
};

int gettok();
}

#endif