Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

Legion
ArraySyntax
AccessorRefHelper
AffineRefHelper
Internal
Fraction
BitPermutation
ProfilingResponseHandler
ProfilingResponseBase
IndexSpaceOperationT
IndexSpaceUnion
IndexSpaceIntersection
IndexSpaceDifference
IndexSpaceNodeT
IndexPartNodeT
ColorSpaceIteratorT
LgTaskArgs
NT_TemplateHelper
DimHelper
LgEvent
PredEvent
ApEvent
ApUserEvent
ApBarrier
RtEvent
RtUserEvent
RtBarrier
LocalLock
AutoLock
AutoTryLock
IndexSpace
IndexSpaceT
IndexPartition
IndexPartitionT
FieldSpace
LogicalRegion
LogicalRegionT
LogicalPartition
LogicalPartitionT
IndexIterator
IndexAllocator
FieldAllocator
UntypedBuffer
ArgumentMap
Predicate
Lock
LockRequest
Grant
PhaseBarrier
DynamicCollective
RegionRequirement
IndexSpaceRequirement
FieldSpaceRequirement
Future
FutureMap
StaticDependence
TaskLauncher
IndexTaskLauncher
InlineLauncher
CopyLauncher
IndexCopyLauncher
FillLauncher
IndexFillLauncher
AttachLauncher
IndexAttachLauncher
PredicateLauncher
TimingLauncher
TunableLauncher
LayoutConstraintRegistrar
TaskVariantRegistrar
PhysicalRegion
ExternalResources
FieldAccessor
ReductionAccessor
PieceIterator
PieceIteratorT
SpanIterator
DeferredValue
DeferredReduction
UntypedDeferredValue
DeferredBuffer
UntypedDeferredBuffer
AcquireLauncher
ReleaseLauncher
MustEpochLauncher
LegionHandshake
MPILegionHandshake
Mappable
Task
Copy
InlineMapping
Acquire
Release
Close
Fill
Partition
MustEpoch
ColoredPoints
InputArgs
RegistrationCallbackArgs
TaskConfigOptions
ProjectionFunctor
ShardingFunctor
FutureFunctor
Runtime
ColoringSerializer
DomainColoringSerializer
UnsafeFieldAccessor
Unserializable
CObjectWrapper
Blockify
CContext
TaskMut
AffineTransform
ScaleTransform
DomainPoint
STLComparator
Domain
DomainPointIterator
PointInRectIterator
RectInDomainIterator
PointInDomainIterator
DomainTransform
DomainAffineTransform
DomainScaleTransform
Span
iterator
reverse_iterator
BitMask
Collective
CompoundBitMask
legion_byte_offset_t
legion_domain_affine_transform_t
legion_domain_point_t
legion_domain_t
legion_domain_transform_t
legion_dynamic_collective_t
legion_field_space_t
legion_index_partition_t
legion_index_space_t
legion_input_args_t
legion_logical_partition_t
legion_logical_region_t
legion_memory_t
legion_phase_barrier_t
legion_processor_t
legion_ptr_t
legion_slice_task_input_t
legion_task_config_options_t
legion_task_options_t
legion_task_slice_t
legion_untyped_buffer_t
TLBitMask