Constructor

Synopsis

Declared in <boost/url/segments_view.hpp>

segments_view(
    iterator first,
    iterator last) noexcept;

Description

This function creates a new segments_view from a pair of iterators referring to elements of another segments view. The resulting view references the same underlying character buffer as the original.

The constructed view preserves the original absolute flag when first selects the first segment and otherwise produces an absolute subview: if the source path is relative and first == ps.begin() the new view is relative, and in every other case the subview is absolute with the separator immediately preceding *first retained at the front. This ensures the underlying text can be reconstructed by concatenating the buffers of adjacent subviews.

The caller is responsible for ensuring that the lifetime of the original buffer extends until the constructed view is no longer referenced.

Example

segments_view ps( "/path/to/file.txt" );

segments_view sub(
    std::next(ps.begin()),
    ps.end());

segments_view first_half(
    ps.begin(),
    std::next(ps.begin()));

// sub represents "/to/file.txt"
std::string combined(first_half.buffer());
combined.append(sub.buffer());
BOOST_ASSERT(combined == ps.buffer());

Preconditions

The iterators must be valid and belong to the same segments_view.

Postconditions

sub.buffer() references characters in the original ps.buffer().

Complexity

Constant

Exception Safety

Throws nothing.

Parameters

Name Description

first

The beginning iterator.

last

The ending iterator.

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