Thursday, June 11, 2009

STL algorithms always use iterators

My ObjectSpace manual says STL algos only access data via iterators. Therefore they are versatile enough to (indirectly) access data elements in arrays, strings, io streams and containers. Typically an algo's input includes a range with 2 demarcation iterators.
Q: any STL algo using just 1 iterator?
A: fill_n() and generate_n()

Q: any STL algo using 0 iterator?
A: swap() is the only one. This manual has a cheatsheet or quick reference chart.

Q: any STL algo using 3 iterators?
A: many

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