bool extract_tokens_from_file(std::string file_name, evl_tokens &tokens) { // use reference to modify it
std::ifstream input_file(file_name.c_str());
if (!input_file){
std::cerr << "I can't read " << file_name << "." << std::endl;
return false;
}
tokens.clear();
std::string line;
for (int line_no = 1; std::getline(input_file, line); ++line_no){
if (!extract_tokens_from_line(line, line_no, tokens)) {
return false;
}
}
return true;
}
// This function extracts a line at a time from the input file and passes it to the function "extract_tokens_from_Line();
bool extract_line_from_File(string filename, evl_tokens &tokens)
{
ifstream infile(filename.c_str());
// This checks whether the input file can be opened. It returns an error if not.
if (!infile)
{
cerr << "This file cannot be opened!" << endl;
return false;
}
tokens.clear();
string line;
//This for loop extracts a line from the input file with each iteration.
for (int line_index = 1; getline(infile, line); line_index++)
{
if(!extract_tokens_from_Line(line_index,line,tokens))
{
return false;
}
}
return true;
}
