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# dmd.aggregate

Compiler implementation of the D programming language.
Authors:
Walter Bright
License:
Boost License 1.0

Source aggregate.d

Documentation https://dlang.org/phobos/dmd_aggregate.html

Coverage https://codecov.io/gh/dlang/dmd/src/master/src/dmd/aggregate.d

enum `ClassKind`: int;
  The ClassKind enum is used in AggregateDeclaration AST nodes to specify the linkage type of the struct/class/interface or if it is an anonymous class. If the class is anonymous it is also considered to be a D class.
  `d`
    the aggregate is a d(efault) class
  `cpp`
    the aggregate is a C++ struct/class/interface
  `objc`
    the aggregate is an Objective-C class/interface
abstract class `AggregateDeclaration`: dmd.dsymbol.ScopeDsymbol;
  ClassKind `classKind`;
    specifies whether this is a D, C++, Objective-C or anonymous struct/class/interface
  Scope* `newScope`(Scope* `sc`);
    Create a new scope from sc. semantic, semantic2 and semantic3 will use this for aggregate members.
  final bool `determineFields`();
    Find all instance fields, then push them into fields.
    Runs semantic() for all instance field variables, but also the field types can remain yet not resolved forward references, except direct recursive definitions. After the process sizeok is set to Sizeok.fwd.
    Returns:
    false if any errors occur.
  final bool `determineSize`(Loc `loc`);
    Collect all instance fields, then determine instance size.
    Returns:
    false if failed to determine the size.
  final bool `checkOverlappedFields`();
    Calculate field[i].overlapped and overlapUnsafe, and check that all of explicit field initializers have unique memory space on instance.
    Returns:
    true if any errors happen.
  final bool `fill`(Loc `loc`, Expressions* `elements`, bool `ctorinit`);
    Fill out remainder of elements[] with default initializers for fields[].
    Parameters:

    Loc `loc` | location
    Expressions* `elements` | explicit arguments which given to construct object.
    bool `ctorinit` | true if the elements will be used for default initialization.

    Returns:
    false if any errors occur. Otherwise, returns true and the missing arguments will be pushed in elements[].
  static pure nothrow @safe void `alignmember`(structalign_t `alignment`, uint `size`, uint* `poffset`);
    Do byte or word alignment as necessary. Align sizes of 0, as we may not know array sizes yet.
    Parameters:

    structalign_t `alignment` | struct alignment that is in effect
    uint `size` | alignment requirement of field
    uint* `poffset` | pointer to offset to be aligned

  static uint `placeField`(uint* `nextoffset`, uint `memsize`, uint `memalignsize`, structalign_t `alignment`, uint* `paggsize`, uint* `paggalignsize`, bool `isunion`);
    Place a member (mem) into an aggregate (agg), which can be a struct, union or class
    Returns:
    offset to place field at
    nextoffset: next location in aggregate memsize: size of member memalignsize: natural alignment of member alignment: alignment in effect for this member paggsize: size of aggregate (updated) paggalignsize: alignment of aggregate (updated) isunion: the aggregate is a union
  final bool `isNested`();
    Returns true if there's an extra member which is the 'this' pointer to the enclosing context (enclosing aggregate or function)
  final Dsymbol `searchCtor`();
    Look for constructor declaration.

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