A Hugo incarnation of the blog. https://danilafe.com
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#pragma once
#include <string>
#include <fstream>
#include <sstream>
#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;
std::ostringstream string_stream;
yy::location location;
size_t file_offset;
std::vector<size_t> line_offsets;
definition_group global_defs;
std::string read_file;
parse_driver(const std::string& file)
: file_name(file), file_offset(0) {}
bool run_parse() {
if(!file_stream.good()) return false;
yyscan_t scanner;
scanner_init(this, &scanner);
yy::parser parser(scanner, *this);
read_file = string_stream.str();
return true;
int get() {
int new_char = file_stream.get();
if(new_char == EOF) return EOF;
if(new_char == '\n') line_offsets.push_back(file_offset);
return new_char;
size_t get_index(int line, int column) {
assert(line > 0);
assert(line <= line_offsets.size());
size_t file_offset = line_offsets[line-1];
file_offset += column - 1;
return file_offset;
size_t get_line_end(int line) {
if(line > line_offsets.size()) return read_file.size();
return get_index(line+1, 1);
void print_highlighted_location(std::ostream& stream, const yy::location& loc) {
size_t print_start = get_index(loc.begin.line, 1);
size_t highlight_start = get_index(loc.begin.line, loc.begin.column);
size_t highlight_end = get_index(loc.end.line, loc.end.column);
size_t print_end = get_line_end(loc.end.line);
const char* content = read_file.c_str();
stream.write(content + print_start, highlight_start - print_start);
stream << "\033[4;31m";
stream.write(content + highlight_start, highlight_end - highlight_start);
stream << "\033[0m";
stream.write(content + highlight_end, print_end - highlight_end);
#define YY_DECL yy::parser::symbol_type yylex(yyscan_t yyscanner, parse_driver& drv)