AggregateDeclaration

checkOverlappedFields bool checkOverlappedFields(): Calculate fieldi.overlapped and overlapUnsafe, and check that all of explicit field initializers have unique memory space on instance.
determineFields bool determineFields(): Find all instance fields, then push them into fields.
determineSize bool determineSize(Loc loc): Collect all instance fields, then determine instance size.
fill bool fill(Loc loc, Expressions* elements, bool ctorinit): Fill out remainder of elements[] with default initializers for fields[].
isNested bool isNested(): Returns true if there's an extra member which is the 'this' pointer to the enclosing context (enclosing aggregate or function)
newScope Scope* newScope(Scope* sc): Create a new scope from sc. semantic, semantic2 and semantic3 will use this for aggregate members.
searchCtor Dsymbol searchCtor(): Look for constructor declaration.

alignmember 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.
placeField 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

Inherited Members

search Dsymbol search(Loc loc, Identifier ident, int flags = SearchLocalsOnly): This function is #1 on the list of functions that eat cpu time. Be very, very careful about slowing it down.
findGetMembers FuncDeclaration findGetMembers(): Look for member of the form: const(MemberInfo)[] getMembers(string); Returns NULL if not found
hasStaticCtorOrDtor bool hasStaticCtorOrDtor(): Return true if any of the members are static ctors or static dtors, or if any members have members that are.
dim size_t dim(Dsymbols* members): Determine number of Dsymbols, folding in AttribDeclaration members.
getNth Dsymbol getNth(Dsymbols* members, size_t nth, size_t* pn = null): Get nth Dsymbol, folding in AttribDeclaration members.
_foreach int _foreach(Scope* sc, Dsymbols* members, scope ForeachDg dg, size_t* pn = null): Expands attribute declarations in members in depth first order. Calls dg(size_t symidx, Dsymbol *sym) for each member. If dg returns !=0, stops and returns that value else returns 0. Use this function to avoid the O(N + N^2/2) complexity of calculating dim and calling N times getNth.