Start using driver, and switch to file IO.

code/compiler/13/main.cpp

@@ -8,6 +8,7 @@
 #include "parser.hpp"
 #include "error.hpp"
 #include "type.hpp"
+#include "parse_driver.hpp"
 #include "llvm/IR/LegacyPassManager.h"
 #include "llvm/IR/Verifier.h"
 #include "llvm/Support/TargetSelect.h"
@@ -21,8 +22,6 @@ void yy::parser::error(const yy::location& loc, const std::string& msg) {
     std::cout << "An error occured: " << msg << std::endl;
 }
 
-extern definition_group global_defs;
-
 void typecheck_program(
         definition_group& defs,
         type_mgr& mgr, type_env_ptr& env) {
@@ -131,13 +130,17 @@ void gen_llvm(global_scope& scope) {
     output_llvm(ctx, "program.o");
 }
 
-int main() {
-    yy::parser parser;
+int main(int argc, char** argv) {
+    if(argc != 2) {
+        std::cout << "please enter a file to compile." << std::endl;
+    }
+    parse_driver driver(argv[1]);
+    driver.run_parse();
+
     type_mgr mgr;
     type_env_ptr env(new type_env);
 
-    parser.parse();
-    for(auto& def_defn : global_defs.defs_defn) {
+    for(auto& def_defn : driver.global_defs.defs_defn) {
         std::cout << def_defn.second->name;
         for(auto& param : def_defn.second->params) std::cout << " " << param;
         std::cout << ":" << std::endl;
@@ -145,8 +148,8 @@ int main() {
         def_defn.second->body->print(1, std::cout);
     }
     try {
-        typecheck_program(global_defs, mgr, env);
-        global_scope scope = translate_program(global_defs);
+        typecheck_program(driver.global_defs, mgr, env);
+        global_scope scope = translate_program(driver.global_defs);
         scope.compile();
         gen_llvm(scope);
     } catch(unification_error& err) {