stl

Common idioms for stl programming.

buf_stream.h

Treat an in-memory buffer as a stream without copying:

const char* c = "Hello world!";
buf_stream bs(c, c+12);

string s;
cin >> s;
assert (s == "Hello");

comment_stream.h

Ignore comments from an underlying istream:

stringstream ss;
ss << "# This is a comment" << endl;
ss << "10";
comment_stream cs(ss);

int x;
cs >> x;
assert(x == 10);

indent_stream.h

Embed tab-stops in an underlying ostream:

stringstream ss;
indent_stream is(ss);

ss << "Hello" << endl;
ss.tab();
ss << "World" << endl;
ss << "!" << endl;
ss.untab();

seq_stream.h

Treat a sequence of streams as a single stream (currently supports reads):

seq_stream ss;

stringstream s1("Hello world");
ss.push(s1);

filestream s2("file.txt");
ss.push(s2);

int x;
while (ss >> x) {
  cout << x << endl;
}