int main()
{
InputStreamWrapper input("test.txt");
TextLineReader reader ( input.stream() );
string line ;
ASSERT ( reader.next_line() );
line = reader.line_string() ; //first line - with explicit method to get the string
ASSERT( line == "first line" ) ;
ASSERT ( reader.next_line() );
line = reader ; //second line - with implicit conversion to std::string
ASSERT( line == "second line" ) ;
ASSERT ( reader.next_line() );
istream &is1 ( reader.line_stream() ); //third line - with explicit method to get the istream
is1 >> line ; // read each word from the line
ASSERT( line == "third" ) ;
is1 >> line ;
ASSERT ( line == "line" ) ;
is1 >> line ; // read past the end of the line - this should fail (and not read the next word from the next line, as it would have happened with a normal istream;
ASSERT ( ! is1 ) ;
ASSERT ( reader.next_line() );
istream &is2 ( reader ) ; // fourth line - with implicit conversion to std::istream
is2 >> line ;
ASSERT( line == "fourth" ) ;
is2 >> line ;
ASSERT( line == "line" ) ;
is1 >> line ; // read past the end of the line - this should fail (and not read the next word from the next line
ASSERT ( !is2 ) ;
//read past the end of the file - make sure it fails.
ASSERT ( !reader.next_line() ) ;
return 0;
}
int main()
{
InputStreamWrapper input("test.txt");
TextLineReader reader ( input.stream() );
string line ;
//Read first line
ASSERT ( reader.next_line() );
line = reader;
ASSERT( line == "first line" ) ;
//Unget the current line -
//The next call to 'reader.next_line' should return this SAME line
//instead of actually reading the next line from the file.
reader.unget_current_line();
//Read the next line -
//but because of the 'unget' it should still return the first line
ASSERT ( reader.next_line() ) ;
line = reader ;
ASSERT( line == "first line" ) ;
ASSERT ( reader.line_number() == 1 ) ; //we should still be on line 1
//Read the next line -
//This should be the real second line from the file.
ASSERT ( reader.next_line() ) ;
line = reader;
ASSERT ( line == "second line" );
ASSERT ( reader.line_number() == 2 ) ;
//Test multiple consecutive ungets
for ( int i=0 ; i < 10; ++i ) {
reader.unget_current_line();
ASSERT ( reader.next_line() ) ;
line = reader;
ASSERT ( line == "second line" );
ASSERT ( reader.line_number() == 2 ) ;
}
//Read the next line -
//This should be the real third line from the file.
ASSERT ( reader.next_line() ) ;
line = reader;
ASSERT ( line == "third line" );
ASSERT ( reader.line_number() == 3 ) ;
//Unget a custom line string
reader.unget_line("hello world");
//Read the next line - this should return the ungot text ("hello world")
ASSERT ( reader.next_line() ) ;
line = reader;
ASSERT ( line == "hello world" );
return 0;
}
