Some basic tokens

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
 *.o
+brb

Lexer.cpp

@@ -1,6 +1,9 @@
 #include "Lexer.h"
 #include "Token.h"
 
-std::vector<Token> tokens() {
+Lexer::Lexer(std::string source) : source(source) {
-    
+}
+
+std::vector<Token> Lexer::tokens() {
+    return { Token::integer, Token::real, Token::integer, Token::eof };
 }

Lexer.h

@@ -6,7 +6,11 @@
 class Token;
 
 class Lexer {
+private:
+    std::string source;
+
 public:
+    Lexer(std::string source);
     std::vector<Token> tokens();
 };
 

Token.cpp

@@ -1 +1,18 @@
 #include "Token.h"
+
+Token::Token(Kind kind): kind(kind) {
+}
+
+std::string Token::toString() {
+    switch (kind) {
+        case integer:
+            return "INTEGER";
+            break;
+        case real:
+            return "REAL";
+            break;
+        case eof:
+            return "EOF";
+            break;
+    }
+}

Token.h

@@ -1,6 +1,8 @@
 #ifndef TOKEN_H
 #define TOKEN_H
 
+#include <iostream>
+
 class Token {
 public:
     enum Kind {
@@ -8,6 +10,13 @@ public:
         real,
         eof
     };
+
+private:
+    Kind kind;
+
+public:
+    Token(Kind kind);
+    std::string toString();
 };
 
 #endif

main.cpp

@@ -0,0 +1,34 @@
+#include <iostream>
+#include <fstream>
+#include "Lexer.h"
+#include "Token.h"
+
+std::string readFile(std::string fileName) {
+    std::ifstream file(fileName.c_str(), std::ios::in | std::ios::binary | std::ios::ate);
+    if (!file.is_open()) {
+        std::cerr << "Cannot open file " << fileName << std::endl;
+        exit(1);
+    }
+
+    std::streamsize fileSize = file.tellg();
+    file.seekg(0, std::ios::beg);
+    std::vector<char> fileBytes(fileSize);
+    file.read(fileBytes.data(), fileSize);
+    return std::string(fileBytes.data(), fileSize);
+}
+
+int main(int argc, char **argv) {
+    if (argc < 2) {
+        std::cerr << "Need to provide a file name" << std::endl;
+        exit(1);
+    }
+
+    std::string source = readFile(std::string(argv[1]));
+    Lexer lexer(source);
+    std::vector<Token> tokens = lexer.tokens();
+    for (Token &token : tokens)
+        std::cout << token.toString() << " ";
+    std::cout << std::endl;
+
+    return 0;
+}

make.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-cc -c -std=c++17 *.cpp
+cc -std=c++17 -lc++ *.cpp -o brb