Start using driver, and switch to file IO.

code/compiler/13/parse_driver.hpp

@@ -0,0 +1,43 @@
+#pragma once
+#include <string>
+#include <fstream>
+#include "definition.hpp"
+#include "location.hh"
+#include "parser.hpp"
+
+struct parse_driver;
+
+void scanner_init(parse_driver* d, yyscan_t* scanner);
+void scanner_destroy(yyscan_t* scanner);
+
+struct parse_driver {
+    std::string file_name;
+    std::ifstream file_stream;
+
+    yy::location location;
+    size_t file_offset;
+
+    std::vector<size_t> line_offsets;
+    definition_group global_defs;
+
+    parse_driver(const std::string& file)
+        : file_name(file) {}
+
+    void run_parse() {
+        file_stream.open(file_name);
+        if(!file_stream.good()) throw 0;
+        yyscan_t scanner;
+        scanner_init(this, &scanner);
+        yy::parser parser(scanner, *this);
+        parser();
+        scanner_destroy(&scanner);
+    }
+
+    int get() {
+        return file_stream.get();
+    }
+};
+
+#define YY_DECL yy::parser::symbol_type yylex(yyscan_t yyscanner, parse_driver& drv)
+
+YY_DECL;