bdlat_attributeinfo.h

Go to the documentation of this file.

/// @file bdlat_attributeinfo.h
///
/// The content of this file has been pre-processed for Doxygen.
///
 
 
// bdlat_attributeinfo.h                                              -*-C++-*-
#ifndef INCLUDED_BDLAT_ATTRIBUTEINFO
#define INCLUDED_BDLAT_ATTRIBUTEINFO
 
#include <bsls_ident.h>
BSLS_IDENT("$Id: $")
 
/// @defgroup bdlat_attributeinfo bdlat_attributeinfo
/// @brief  Provide a container for attribute information.
/// @addtogroup bdl
/// @{
/// @addtogroup bdlat
/// @{
/// @addtogroup bdlat_attributeinfo
/// @{
///
/// <h1> Outline </h1>
/// * <a href="#bdlat_attributeinfo-purpose"> Purpose</a>
/// * <a href="#bdlat_attributeinfo-classes"> Classes </a>
/// * <a href="#bdlat_attributeinfo-description"> Description </a>
///   * <a href="#bdlat_attributeinfo-usage"> Usage </a>
///     * <a href="#bdlat_attributeinfo-example-1-basic-usage"> Example 1: Basic Usage </a>
///
/// # Purpose {#bdlat_attributeinfo-purpose}
/// Provide a container for attribute information.
///
/// # Classes {#bdlat_attributeinfo-classes}
///
/// -  bdlat_AttributeInfo: container for attribute information
///
/// @see  bdlat_sequencefunctions
///
/// # Description {#bdlat_attributeinfo-description}
/// This component provides the `bdlat_AttributeInfo` `struct`,
/// which is a container for holding information (properties) about a sequence
/// attribute.  The properties of an attribute include its name and the length
/// of its name, its distinct id within its containing type, its formatting
/// mode, and a brief annotation.  Although each attribute property is publicly
/// accessible, a manipulator and accessor is also supplied for each.
///
/// When accessing or manipulating an attribute of a "sequence" type (using one
/// of the functions from the `bdlat_SequenceFunctions` namespace), an instance
/// of this `struct` will be passed as the second argument to the accessor or
/// manipulator.
///
/// Note that this `struct` needs to be a POD type.
///
/// ## Usage {#bdlat_attributeinfo-usage}
///
///
/// This section illustrates intended use of this component.
///
/// ### Example 1: Basic Usage {#bdlat_attributeinfo-example-1-basic-usage}
///
///
/// Suppose you create an accessor for sequence attributes that prints each
/// attribute to an output stream:
/// @code
/// #include <bdlat_attributeinfo.h>
/// #include <ostream>
///
/// using namespace BloombergLP;
///
/// class PrintAttributeWithInfo {
///     // Print the attribute along with its name and annotation.
///
///     // PRIVATE DATA MEMBERS
///     bsl::ostream *d_stream_p;
///
///   public:
///     // CREATORS
///     PrintAttributeWithInfo(bsl::ostream *stream)
///     : d_stream_p(stream)
///     {
///     }
///
///     // OPERATIONS
///     template <typename TYPE>
///     int operator()(const TYPE&                attribute,
///                    const bdlat_AttributeInfo& info)
///     {
///         (*d_stream_p) << attribute << " ("
///                       << bsl::string(info.name(),
///                                      info.nameLength())
///                       << ", "
///                       << info.annotation() << ")\n";
///     }
/// };
/// @endcode
/// @}
/** @} */
/** @} */
 
/** @addtogroup bdl
 * @{
 */
/** @addtogroup bdlat
 * @{
 */
/** @addtogroup bdlat_attributeinfo
 * @{
 */
 
#include <bdlscm_version.h>
 
#include <bdlat_bdeatoverrides.h>
 
#include <bslmf_istriviallycopyable.h>
#include <bslmf_istriviallydefaultconstructible.h>
#include <bslmf_nestedtraitdeclaration.h>
 
#include <bsls_keyword.h>
 
#include <bsl_climits.h>
#include <bsl_cstring.h>
#include <bsl_iosfwd.h>
 
#ifndef BDE_DONT_ALLOW_TRANSITIVE_INCLUDES
#include <bslalg_typetraits.h>
#endif // BDE_DONT_ALLOW_TRANSITIVE_INCLUDES
 
 
 
 
                         // ==========================
                         // struct bdlat_AttributeInfo
                         // ==========================
 
/// This `struct` holds information about an attribute.  Its data members
/// are `public` by design so that instances may be statically initialized.
struct bdlat_AttributeInfo {
 
    // PUBLIC DATA -- DO *NOT* REORDER
    int         d_id;              // distinct id of attribute
    const char *d_name_p;          // name of attribute
    int         d_nameLength;      // length of attribute name (0-terminator
                                   // not included)
    const char *d_annotation_p;    // attribute annotation
    int         d_formattingMode;  // formatting mode
 
    // TRAITS
    BSLMF_NESTED_TRAIT_DECLARATION(bdlat_AttributeInfo,
                                   bsl::is_trivially_copyable);
    BSLMF_NESTED_TRAIT_DECLARATION(bdlat_AttributeInfo,
                                   bsl::is_trivially_default_constructible);
 
    // CREATORS
 
    // The following methods are not defined by design:
    //..
    //   bdlat_AttributeInfo();
    //   bdlat_AttributeInfo(const bdlat_AttributeInfo& original);
    //   ~bdlat_AttributeInfo();
    //..
    // The corresponding methods supplied by the compiler are sufficient.
 
    // MANIPULATORS
 
    // The following method is not defined by design:
    //..
    //   bdlat_AttributeInfo& operator=(const bdlat_AttributeInfo& rhs);
    //..
    // The assignment operator supplied by the compiler is sufficient.
 
    /// Return a reference to the modifiable annotation of this attribute
    /// info object.
    const char *& annotation();
 
    /// Return a reference to the modifiable formatting mode of this
    /// attribute info object.
    int& formattingMode();
 
    /// Return a reference to the modifiable id of this attribute info
    /// object.
    int& id();
 
    /// Return a reference to the modifiable name of this attribute info
    /// object.
    const char *& name();
 
    /// Return a reference to the modifiable length of the name of this
    /// attribute info object.  Note that the 0-terminator is not included
    /// in the length.
    int& nameLength();
 
    // ACCESSORS
 
    /// Return the non-modifiable annotation of this attribute info object.
    BSLS_KEYWORD_CONSTEXPR
    const char *annotation() const;
 
    /// Return the formatting mode of this attribute info object.
    BSLS_KEYWORD_CONSTEXPR
    int formattingMode() const;
 
    /// Return the id of this attribute info object.
    BSLS_KEYWORD_CONSTEXPR
    int id() const;
 
    /// Return the non-modifiable name of this attribute info object.
    BSLS_KEYWORD_CONSTEXPR
    const char *name() const;
 
    /// Return the length of the name of this attribute info object.  Note
    /// that the 0-terminator is not included in the length.
    BSLS_KEYWORD_CONSTEXPR
    int nameLength() const;
};
 
// ============================================================================
//                            INLINE DEFINITIONS
// ============================================================================
 
// FREE OPERATORS
 
/// Return `true` if the specified `lhs` and `rhs` attribute info objects
/// have the same value, and `false` otherwise.  Two attribute info objects
/// have the same value if each of their respective properties are
/// identical.
inline
bool operator==(const bdlat_AttributeInfo& lhs,
                const bdlat_AttributeInfo& rhs);
 
/// Return `true` if the specified `lhs` and `rhs` attribute info objects do
/// not have the same value, and `false` otherwise.  Two attribute info
/// objects do not have the same value if at least one of their respective
/// properties is not identical.
inline
bool operator!=(const bdlat_AttributeInfo& lhs,
                const bdlat_AttributeInfo& rhs);
 
/// Write the value of the specified `attributeInfo` to the specified
/// `stream`.
bsl::ostream& operator<<(bsl::ostream&              stream,
                         const bdlat_AttributeInfo& attributeInfo);
 
// MANIPULATORS
inline
const char *& bdlat_AttributeInfo::annotation()
{
    return d_annotation_p;
}
 
inline
int& bdlat_AttributeInfo::formattingMode()
{
    return d_formattingMode;
}
 
inline
int& bdlat_AttributeInfo::id()
{
    return d_id;
}
 
inline
const char *& bdlat_AttributeInfo::name()
{
    return d_name_p;
}
 
inline
int& bdlat_AttributeInfo::nameLength()
{
    return d_nameLength;
}
 
// ACCESSORS
inline
BSLS_KEYWORD_CONSTEXPR
const char *bdlat_AttributeInfo::annotation() const
{
    return d_annotation_p;
}
 
inline
BSLS_KEYWORD_CONSTEXPR
int bdlat_AttributeInfo::formattingMode() const
{
    return d_formattingMode;
}
 
inline
BSLS_KEYWORD_CONSTEXPR
int bdlat_AttributeInfo::id() const
{
    return d_id;
}
 
inline
BSLS_KEYWORD_CONSTEXPR
const char *bdlat_AttributeInfo::name() const
{
    return d_name_p;
}
 
inline
BSLS_KEYWORD_CONSTEXPR
int bdlat_AttributeInfo::nameLength() const
{
    return d_nameLength;
}
 
// FREE OPERATORS
 
inline
bool operator==(const bdlat_AttributeInfo& lhs, const bdlat_AttributeInfo& rhs)
{
    return lhs.formattingMode() == rhs.formattingMode()
        && lhs.id()             == rhs.id()
        && lhs.nameLength()     == rhs.nameLength()
        && 0 == bsl::memcmp(lhs.name(), rhs.name(), lhs.nameLength())
        && 0 == bsl::strcmp(lhs.annotation(), rhs.annotation());
}
 
inline
bool operator!=(const bdlat_AttributeInfo& lhs, const bdlat_AttributeInfo& rhs)
{
    return !(lhs == rhs);
}
 
 
 
#endif
 
// ----------------------------------------------------------------------------
// Copyright 2015 Bloomberg Finance L.P.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ----------------------------- END-OF-FILE ----------------------------------
 
/** @} */
/** @} */
/** @} */