Add basic error handling

.gitignore

@@ -1,6 +1,6 @@
 .antlr/
 build/
-
+lib/
 # Prerequisites
 *.d
 

.vscode/settings.json

@@ -6,5 +6,8 @@
         "listeners": true,
         "visitors": true,
         "outputDir": "../lib/generated"
+    },
+    "files.associations": {
+        "ostream": "cpp"
     }
 }

README.md

@@ -0,0 +1,9 @@
+# bfc
+
+An extension of a language that shall not be named
+
+## Setup oddities
+
+1. Copy antlr4's cpp libs to `./libs/antlr4`.
+2. Copy `antlr-4.8-complete.jar` to `./thirdparty/antlr`.
+3. Generate parsers to `./libs/generated` or use VSCode with the ANTLR extension.

include/main.hpp

@@ -1,3 +1,3 @@
-#ifndef __MAIN_HPP
+#pragma once
-#define FIVE 5
+
-#endif
+#define FOO 1

src/main.cpp

@@ -41,11 +41,10 @@ public:
 
 int main(int argc, const char *argv[])
 {
-    // std::cout<<"Hello World "<<FIVE<<std::endl;
     std::ifstream stream;
-    try{
+    
     stream.open(argv[1]);
-    }catch(std::exception e){
+    if(stream.fail()){
         std::cout<<"Could not open"<<std::endl;
         return 1;
     }