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Front Extensible Sequence


A Front Extensible Sequence is an Extensible Sequence that supports amortized constant time insertion and removal operations at the beginning.

Refinement of

Extensible Sequence

Expression requirements

In addition to the requirements defined in Extensible Sequence, for any Back Extensible Sequence s the following must be met:

Expression Type Complexity
push_front<s,x>::type Front Extensible Sequence Amortized constant time
pop_front<s>::type Front Extensible Sequence Amortized constant time
front<s>::type Any type Amortized constant time

Expression semantics

The semantics of an expression are defined only where they differ from, or are not defined in Extensible Sequence.

Expression Semantics
push_front<s,x>::type Equivalent to insert<s,begin<s>::type,x>::type; see push_front.
pop_front<v>::type Equivalent to erase<s,begin<s>::type>::type; see pop_front.
front<s>::type The first element in the sequence; see front.


See also

Sequences, Extensible Sequence, Back Extensible Sequence, push_front, pop_front, front