Less‐than operators

Synopses

Declared in <bslstl_optional.h>

Return true if the specified lhs iterator is earlier in the underlying sequence than the specified rhs iterator, and false otherwise.

bool
operator<(
    vector_UintPtrConversionIterator const& lhs,
    vector_UintPtrConversionIterator const& rhs);

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Return whether the specified stacks compare lexicographically; see the non‐member operator< in the bsl namespace.

template<
    class VAL,
    class CONT>
bool
operator<(
    stack<VAL, CONT> const& lhs,
    stack<VAL, CONT> const& rhs);

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Return whether lhs is lexicographically less than rhs.

template<
    class VALUE,
    class CONTAINER>
bool
operator<(
    stack<VALUE, CONTAINER> const& lhs,
    stack<VALUE, CONTAINER> const& rhs);

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Return whether the specified queues compare lexicographically; see the non‐member operator< in the bsl namespace.

template<
    class VALUE2,
    class CONTAINER2>
bool
operator<(
    queue<VALUE2, CONTAINER2> const& lhs,
    queue<VALUE2, CONTAINER2> const& rhs);

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Return true if lhs is lexicographically less than rhs.

template<
    class VALUE,
    class CONTAINER>
bool
operator<(
    queue<VALUE, CONTAINER> const& lhs,
    queue<VALUE, CONTAINER> const& rhs);

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Return true if lhs is less than rhs.

template<
    class t_HEAD,
    class... t_TAIL>
bool
operator<(
    variant<t_HEAD, t_TAIL...> const& lhs,
    variant<t_HEAD, t_TAIL...> const& rhs);

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Return true if __x is lexicographically less than __y.

template<
    class _Tp,
    class _Alloc>
bool
operator<(
    slist<_Tp, _Alloc> const& __x,
    slist<_Tp, _Alloc> const& __y);

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Return whether the left‐hand operand is ordered before the right.

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<(
    bsl::optional<t_LHS_TYPE> const& lhs,
    bsl::optional<t_RHS_TYPE> const& rhs);

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Return whether the left‐hand operand is ordered before the right.

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<(
    bsl::optional<t_LHS_TYPE> const& lhs,
    t_RHS_TYPE const& rhs);

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Return whether the left‐hand operand is ordered before the right.

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<(
    t_LHS_TYPE const& lhs,
    bsl::optional<t_RHS_TYPE> const& rhs);

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Return whether the left‐hand operand is ordered before the right.

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<(
    bsl::optional<t_LHS_TYPE> const& lhs,
    std::optional<t_RHS_TYPE> const& rhs);

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Compare a std::optional with a bsl::optional using less‐than.

template<
    class t_LHS_TYPE,
    class t_RHS_TYPE>
constexpr
bool
operator<(
    std::optional<t_LHS_TYPE> const& lhs,
    bsl::optional<t_RHS_TYPE> const& rhs);

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Return Value

  • true if lhs precedes rhs in the underlying sequence

  • true if lhs is lexicographically less than rhs

  • true if lhs is lexicographically less than rhs, otherwise false

  • true if lhs is lexicographically less than rhs, otherwise false

  • true if lhs is less than rhs

  • true if __x < __y, and false otherwise

  • true if lhs is ordered before rhs, and false otherwise

Parameters

Name

Description

lhs

left‐hand operand

rhs

right‐hand operand

__x

left‐hand list

__y

right‐hand list

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