Reintegration of Custom Attributes branch by Joost van der Sluis with patches reworked by Svetozar Belic [patch 1/3]

Implemented attributes for class types and properties (based on work by Joost van der Sluis). Added TCustomAttribute - a base class for attributes. Added TUnitInfo record to RTTI. It contains the unit name and unit options (for now only a flag which specifies if the unit contains attributes). Added several tests for attributes.

* instead of embedding the attributes inside the class' and property's type data only store a reference to a table of attributes

* rename TAttributeData to the more appropriate TAttributeTable

* streamline retrieval of attributes (both in TypInfo and RTTI units)

Merge: fc46b6c57c 70a2b0b260

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* fix for Mantis 0035982: free created attributes once the type is freed
+ added test

* fix for Mantis 0036196: free a property's attributes when the property is destroyed
+ added test

* implement interface thunk for RISC V 32- and 64-bit

* fix for Mantis 0038381: apply patch by Bi0T1N to add two Delphi compatible overloads for TValue.Make

* TMethodImplementation.HandleCallback: fix building the argument array if the result is passed in a parameter

+ add Handle property to access the TypeInfo pointer of the TRttiType

* move initialization of TValue to a separate method to avoid duplicate implementations

+ add Rtti types for static and dynamic arrays
+ added tests

+ add TValue.FromArray to create a TValue type for a static or dynamic array from an array of TValues
+ added test

* fixup

* JSON-RPC using Invoke

* Move resourcestrings to single unit

* fix gitlab 0039506: add assignment operator overloads for all string types so that assignments of constant strings can be handled correctly
+ added adjusted/extended test (the test isn't enabled by default however as it requires libffi on most platforms)

Add loongarch64 packages support

* Dotted filenames for package fcl-json

* Dotted filenames for package fcl-web

* Delphi compatibility: Add conversion between TValue from/to variant and TVarRec

* GetAttribute call

* use the VWideChar field to retrieve the WideChar value instead of VChar to fix usage on big endian systems

* correctly retrieve the type of the Variant

* (Try)Cast

--amend

* Add IsInstanceOf

* Make IInterface methods virtual, as in Delphi

* Add TRttiEnumerationType for Delphi compatibility

* Get extended methods, fields and property info.

Fix msdos compilation failure by using CodePointer type for GetCodeAddress TRttiRecordMethod function

* Return delphi-compatible output for TValue.ToString when empty

* Get Field Attributes + tests

* Implement TRttiField.(G|S)etValue

* Implement GetCodeAddress for TRttiInstanceMethod

* Fix memory leaks

* Remove additional memleak

* Fix duplicate registration of existing RTTI

* Fix ref count of interface during cast

* Synchronize Method/Field treatment. Correct parent for fields

* Complete erroneously partial commit

* Allow to call constructor using Invoke()

* Remove debug statement

* Attributes for methods

* Properly pass on FUsePublishedOnly to properties. Fixes issue gitlab 0040702

* Allow ToString for object value

* Fixed DeclaredFields for record, should be the same as fields

* Small correction in property resolve

* Correctly pass UsePublishedOnly on to sub-contexts. Fixes issue gitlab 0040828

* Fix bug with nameIndex

* Handle tkFloat in TValue.ToString

* Implement DropContext/KeepContext for Delphi compatibility. Patch by Artem Izmaylov. Fixes issue gitlab 0040884

* recordrtti needs to override getmethods. Fixes issue gitlab 0040951

* Add GetMethod(name), patch by Lipinast Lekrisov, fixes issue gitlab 0040953

* Patch from Lipinast Lekrisov to implement setting method-type properties. Fixes issue gitlab 0040970

Added TRttiIndexedProperty, the whole property handling infrastructure has been significantly redesigned

Fixed TRttiRecordType.ResolveProperties (records do not have a published section)

* fix compilation on systems where SizeOf(CodePointer) <> SizeOf(Pointer): disable ToString for tkMethod on these systems for now

* Patch from Евгений Савин to fix missing ansistring conversion in TryCast. Fixes issue gitlab 0041002

* Patch from Евгений Савин to implement TValue.Cast for floats. Fixes issue gitlab 0041011

* Fix comp errors. Patch by Евгений Савин. Fixes issue gitlab 0041016

* Delphi-compatible output for tvalue.asstring for float value. Fixes issue gitlab 0041027

* Fix TValue casts, patch by Евгений Савин, fixes issue gitlab 0041030

* Add IsType with aEmptyAsAnyType param

* Patch from Евгений Савин to fix TValue.From. Fixes issue gitlab 0041013

* correct TValue.Cast, patch by Евгений Савин. Fixes issue gitlab 0041042

* Add overload, needed when specializing in Delphi mode

* Allow assign of pointer to TValue. Patch by Lipinast Lekrisov

* Introduce AsRecord. Patch by Lipinast Lekrisov

* Allow to cast pointer TValue to class pointer. Patch from Lipinast Lekrisov

* TValue.From with buffer and typeinfo. Patch from Lipinast Lekrisov

* Delphi-compatible ToString for TRttiType. Patch from Lipinast Lekrisov

* Introduce AsOrdinal. Patch by Lipinast Lekrisov

* Get method by address. Patch by Lipinast Lekrisov

* Correct TRttiOrdinalType.GetIsOrdinal. Patch from Lipinast Lekrisov

* Introduce IsClassProperty, Index and Default in TRttiProperty. Patch from Lipinast Lekrisov

* Fix compiler warnings and hints

* Introduce TRttiMethodType.GetMethodKind. Patch by Lipinast Lekrisov

* Read/Write static properties. Patch from Lipinast Lekrisov

* Invoke for record methods, refactoring method rtti by Lipinast Lekrisov

* Improvements to TValue.ToString by Lipinast Lekrisov

* Small improvement in setting method prop, by Lipinast Lekrisov

* Forgot to commit, main part of indexed properties implementation by Lipinast Lekrisov

* TValue.Asstring for double

* Small change in indexed property .ToString

* SMall optimization in TRttiInstanceMethod.GetParameters

* GetDataSize is 0 for empty TValue

* GetHasExtendedInfo returns false in TRttiMethod

* optimization of TRttiInstanceType.ResolveExtendedDeclaredProperties

* Extend error message SErrInvokeArgInvalidType

* Fixes after re-running test

* Order of parent/child methods is now same as in delphi documentation

* Correctly set FDeclaredProperties length

* fix compilation on i8086 where depending on the memory type code and data pointers may be different (Note: this does not mean that the code works as the RTTI data generated by the compiler does not seem valid either)

- current Lazarus IDEs can handle generic methods, so no need for NoGenericMethods anymore

+ initial implementation of System.Rtti.Invoke() for WebAssembly. Currently
only works with the internal linker. Not all types have been tested, yet.

* Call correct newinstance when overridden. Fixes issue gitlab 0041090

* Patch from Lipinast Lekrisov to get/set record-typed values. Fixes issue gitlab 0041129

Try to solve compilation failure for msdos OS

* Various IsXYZ functions for TValue

Also use USE_WINDOWS_UNIT macro in rtti unit

Fix TRttiContext thread safety.

Make use of the automatic TRttiContext management.

Fix compilation for target without threading feature

+ add implicit assignment operators from TDateTime, TDate and TTime to TValue so that the later will have the correct type information

+ add = and <> operators to TValue based on the existing SameValue()

* Allow to hook into QueryInterface for thunk objects

Fix 1f3a013f8f1 for unix target, by using system.TTime (to avoid using TTime also defined in baseunix unit)

* Fix wrongly placed define

* adjust TMethodImplementation, TRttiMethod and TRttiInvokableType to use a function reference instead of a method or function variable
(the old types are still there, but deprecated as the compiler should be able to pass them to the new CreateImplementation() methods nevertheless)

+ add Delphi-compatible overload for TRttiInvokableType.CreateImplementation (at the same time also provides a more correct implementation of the TCallback one)

* TValue.AsChar needs to return Char, not AnsiChar

* readd adjusted comment regarding InLazIDE which can still have its use

* CodeTools does not yet like the "deprecated" for method pointers so protect them with InLazIDE

* handle tkAString, not tkLString as the former is for AnsiString while the later is for the not fully implemented ShortString-like LongString type

Update repository

* CamelCase unit names. Generates nicer documentation

* Open array also needs arg name. Fixes issue gitlab 0038934

* Some thread-safety fixes, fixes issue gitlab 0037302

* Automatically detect use of Extended RTTI. Fixes issue gitlab 0041089

* PChar -> PAnsiChar

* Use const string arguments where possible. Fixes issue 0040441

* Fix issue 0040835