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While writing Design Patterns with Delphi, I spent quite some time researching existing literature on design patterns implementation in Delphi, design patterns in other languages, other types of patterns, design principles and so on … In case you would like to dig deeper than the book takes you, here is my reading list. Design Patterns Essentials Software design pattern Computer Science Design Patterns The 23 patterns from the GoF Design Patterns with examples in different languages (including Delphi) Gang of Four Design Patterns Reference Sheet Programming principles Design principles and design patterns SOLID Don't Repeat Yourself (DRY) KISS YAGNI (You Ain't Gonna Need It) Software Design Patterns Are Not Goals, They Are Tools I'm Sick Of GoF Design Patterns Software Development AntiPatterns Big Ball of Mud Design Patterns for Humans Spring4D MMX Code Explorer Singleton https://en.wikipedia.org/wiki/Singleton_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Singleton http://www.yanniel.info/2010/10/singleton-pattern-delphi.html https://ibeblog.com/2010/08/18/delphi-singleton-patterns/ https://stackoverflow.com/a/1409672/4997 https://github.com/jimmckeeth/DelphiPatterns/tree/master/Creational.Singleton https://stackoverflow.com/questions/1409593/creating-a-singleton-in-delphi-using-the-new-features-of-d2009-and-d2010 https://sourcemaking.com/design_patterns/singleton https://schellingerhout.github.io/design%20patterns/design-patterns-creational-delphi/ https://github.com/kamranahmedse/design-patterns-for-humans#-singleton Dependency injection https://en.wikipedia.org/wiki/Dependency_injection http://www.nickhodges.com/post/Service-Locator-is-Indeed-an-Anti-pattern.aspx https://softwareengineering.stackexchange.com/questions/135914/why-was-dependency-injection-pattern-not-included-in-the-gang-of-four/135982 https://stackoverflow.com/questions/4176520/what-is-the-difference-between-strategy-pattern-and-dependency-injection Lazy Initialization https://en.wikipedia.org/wiki/Lazy_initialization Object pool https://en.wikipedia.org/wiki/Object_pool_pattern https://sourcemaking.com/design_patterns/object_pool Factory method https://en.wikipedia.org/wiki/Factory_method_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Factory_method https://github.com/jimmckeeth/DelphiPatterns/tree/master/Creational.FactoryMethod https://sourcemaking.com/design_patterns/factory_method https://schellingerhout.github.io/design%20patterns/design-patterns-creational-delphi/ https://github.com/kamranahmedse/design-patterns-for-humans#-factory-method Abstract factory https://en.wikipedia.org/wiki/Abstract_factory_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Abstract_Factory http://www.felix-colibri.com/papers/design_patterns/factory_and_bridge_patterns/factory_and_bridge_patterns.html#abstract_factory_pattern https://github.com/jimmckeeth/DelphiPatterns/tree/master/Creational.AbstractFactory http://www.nickhodges.com/post/Delphi-and-the-Factory-Pattern-Simple-Factory.aspx https://sourcemaking.com/design_patterns/abstract_factory https://schellingerhout.github.io/design%20patterns/design-patterns-creational-delphi/ https://github.com/kamranahmedse/design-patterns-for-humans#-abstract-factory Prototype https://sourcemaking.com/design_patterns/prototype https://schellingerhout.github.io/design%20patterns/design-patterns-creational-delphi/ https://en.wikipedia.org/wiki/Object_copying#Deep_copy https://github.com/kamranahmedse/design-patterns-for-humans#-prototype Builder https://en.wikipedia.org/wiki/Builder_pattern https://github.com/jimmckeeth/DelphiPatterns/tree/master/Creational.Builder https://sourcemaking.com/design_patterns/builder https://schellingerhout.github.io/design%20patterns/design-patterns-creational-delphi/ https://github.com/kamranahmedse/design-patterns-for-humans#-builder Composite https://en.wikipedia.org/wiki/Composite_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Composite https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Composite https://sourcemaking.com/design_patterns/composite https://github.com/kamranahmedse/design-patterns-for-humans#-composite Flyweight https://en.wikipedia.org/wiki/Flyweight_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Flyweight https://sourcemaking.com/design_patterns/flyweight https://github.com/kamranahmedse/design-patterns-for-humans#-flyweight https://en.wikipedia.org/wiki/String_interning Marker interface https://en.wikipedia.org/wiki/Marker_interface_pattern Bridge https://stackoverflow.com/questions/350404/how-do-the-proxy-decorator-adapter-and-bridge-patterns-differ https://en.wikipedia.org/wiki/Bridge_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Bridge https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Bridge https://sourcemaking.com/design_patterns/bridge http://www.felix-colibri.com/papers/design_patterns/factory_and_bridge_patterns/factory_and_bridge_patterns.html#the_bridge_design_pattern https://simpleprogrammer.com/design-patterns-simplified-the-bridge-pattern/ https://github.com/kamranahmedse/design-patterns-for-humans#-bridge https://stackoverflow.com/q/319728/4997 Adapter https://en.wikipedia.org/wiki/Adapter_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Adapter https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Adapter https://sourcemaking.com/design_patterns/adapter https://github.com/kamranahmedse/design-patterns-for-humans#-adapter Proxy https://en.wikipedia.org/wiki/Proxy_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Proxy https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Proxy https://sourcemaking.com/design_patterns/proxy https://github.com/kamranahmedse/design-patterns-for-humans#-proxy Decorator https://en.wikipedia.org/wiki/Decorator_pattern https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Decorator https://sourcemaking.com/design_patterns/decorator https://github.com/kamranahmedse/design-patterns-for-humans#-decorator Facade https://en.wikipedia.org/wiki/Facade_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Facade https://github.com/jimmckeeth/DelphiPatterns/tree/master/Structural.Facade https://sourcemaking.com/design_patterns/facade https://github.com/kamranahmedse/design-patterns-for-humans#-facade Null object https://en.wikipedia.org/wiki/Null_object_pattern https://sourcemaking.com/design_patterns/null_object Template method https://en.wikipedia.org/wiki/Template_method_pattern https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.TemplateMethod https://www.codeproject.com/Articles/516094/TemplateplusMethodplusDesignplusPatternplusinplusD https://sourcemaking.com/design_patterns/template_method https://github.com/kamranahmedse/design-patterns-for-humans#-template-method Command https://en.wikipedia.org/wiki/Command_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Command https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.Command https://sourcemaking.com/design_patterns/command https://github.com/kamranahmedse/design-patterns-for-humans#-command https://stackoverflow.com/q/6064116/4997 State https://en.wikipedia.org/wiki/State_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/State https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.State https://sourcemaking.com/design_patterns/state https://sourcemaking.com/design_patterns/state/delphi https://github.com/kamranahmedse/design-patterns-for-humans#-state https://en.wikipedia.org/wiki/Finite-state_machine Iterator https://en.wikipedia.org/wiki/Iterator_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Iterator https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.Iterator https://sourcemaking.com/design_patterns/iterator https://github.com/kamranahmedse/design-patterns-for-humans#-iterator http://docwiki.embarcadero.com/RADStudio/Tokyo/en/Declarations_and_Statements_(Delphi)#For_Statements Visitor https://en.wikipedia.org/wiki/Visitor_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Visitor https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.Visitor https://sourcemaking.com/design_patterns/visitor https://sourcemaking.com/design_patterns/visitor/delphi https://github.com/kamranahmedse/design-patterns-for-humans#-visitor Observer https://en.wikipedia.org/wiki/Observer_pattern https://en.wikipedia.org/wiki/Publish–subscribe_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Observer https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.Observer https://github.com/spinettaro/delphi-event-bus https://sourcemaking.com/design_patterns/observer/delphi https://github.com/kamranahmedse/design-patterns-for-humans#-observer http://docwiki.embarcadero.com/Libraries/en/System.Messaging.TMessageManager http://docwiki.embarcadero.com/RADStudio/en/Using_the_RTL_Cross-Platform_Messaging_Solution http://docwiki.embarcadero.com/RADStudio/en/Sending_and_Receiving_Messages_Using_the_RTL http://docwiki.embarcadero.com/Libraries/en/System.Classes.TComponent.Observers Memento https://en.wikipedia.org/wiki/Memento_pattern https://en.wikibooks.org/wiki/Computer_Science_Design_Patterns/Memento https://github.com/jimmckeeth/DelphiPatterns/tree/master/Behavioral.Memento https://sourcemaking.com/design_patterns/memento https://github.com/kamranahmedse/design-patterns-for-humans#-memento Lock https://en.wikipedia.org/wiki/Lock_(computer_science) https://en.wikipedia.org/wiki/Spinlock Lock striping https://netjs.blogspot.si/2016/05/lock-striping-in-java-concurrency.html Double-checked locking https://en.wikipedia.org/wiki/Double-checked_locking https://en.wikipedia.org/wiki/Test_and_test-and-set Optimistic locking https://www.javaworld.com/article/2075406/java-web-development/optimistic-locking-pattern-for-ejbs.html https://martinfowler.com/eaaCatalog/optimisticOfflineLock.html https://en.wikipedia.org/wiki/Optimistic_concurrency_control Readers-writer lock https://en.wikipedia.org/wiki/Readers–writer_lock https://docs.microsoft.com/en-us/windows/desktop/sync/slim-reader-writer--srw--locks Thread pool https://en.wikipedia.org/wiki/Thread_pool https://stackoverflow.com/questions/47504201/delphi-ttask-and-tthreadpool Messaging https://en.wikipedia.org/wiki/Message_passing https://en.wikipedia.org/wiki/Message_queue Future https://en.wikipedia.org/wiki/Futures_and_promises Pipeline https://en.wikipedia.org/wiki/Staged_event-driven_architecture Designing Delphi programs https://en.wikipedia.org/wiki/Event-driven_programming http://blong.com/Articles/Actions/Actions.htm https://github.com/andrea-magni/TFrameStand https://martinfowler.com/eaaCatalog/tableModule.html https://stackoverflow.com/questions/433819/table-module-vs-domain-model http://docwiki.embarcadero.com/RADStudio/en/LiveBindings_in_RAD_Studio https://www.embarcadero.com/images/dm/technical-papers/understanding_rad_studio_livebindings.pdf Other kinds of patterns https://en.wikipedia.org/wiki/Exception_handling http://wiki.c2.com/?ExceptionPatterns http://docwiki.embarcadero.com/Libraries/en/System.TObject.Destroy http://www.heaventools.com/eurekalog-exception-logger.htm http://www.madshi.net/madExceptDescription.htm https://github.com/project-jedi/jvcl https://en.wikipedia.org/wiki/Debugging_patterns https://git-scm.com/docs/git-bisect http://www.washi.cs.waseda.ac.jp/wp-content/uploads/2017/03/Woei-Kae-Chen.pdf https://github.com/colinj/Functional https://fsharpforfunandprofit.com/fppatterns/ https://en.wikipedia.org/wiki/Comparison_of_programming_paradigms Books & papers Architectural Patterns, Pethuru Raj, Anupama Raman, Harihara Subramanian Coding in Delphi, Nick Hodges Concurrency with Modern C++, Rainer Grimm Concurrent Patterns and Best Practices, Atul S. Khot Dependency Injection in Delphi, Nick Hodges Design Patterns for Humans, Kamran Ahmed Design Patterns Past and Future, Aleksandar Bulajic Design Patterns - Elements of Reusable Object-Oriented Software, Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides Dive Into Design Patterns, Alexander Shvets Java Design Patterns, Devendra Singh More Coding in Delphi, Nick Hodges The Null Object Pattern, Bobby Woolf

Back to the original topic regarding repeat ... until: I use them very rarely myself. I really miss the for statement from C/C++ in Delphi, because it lets you specify the initial condition as well as the test and incrementor all in the same line. The problem with most loops is you need to do something first to "prime the pump" so to speak, before you can get the while or repeat loop running. A classic one is iterating through the results of a DB query: qry.Open; . . . qry.First(); while not qry.EOF do begin . . . qry.Next(); end; In C/C++ that could be done as follows: for (qry.Open; not qry.EOF; qry.Next) { . . . } I think this is much nicer.

Open sourcing the compiler(s) will never happen. That is the core of EMBT's intellectual property, and one of the major reasons why Lazarus/FPC has not eroded the Delphi market further than it has; compiler compatibility. There is no money in writing an IDE and there are lots of them freely available. EMBT's revenue is from developers who have lots of source code which is tied to the Delphi compilers. The IDE makes for most of the development experience, so I think you would have more chance of getting the IDE Core open sourced (like Visual Studio shell) than getting the compiler open sourced. Many developers could competently work on the IDE to improve it, make it portable (xPlatform) etc, but not many developers could contribute to the compilers, IMHO.

Why don't you use MultiPaste in the first place and let it add the comma after each line. Then you end up with only one remaining error for the semicolon at the last line.

So is trying to get the Delphi compiler open sourced.

There is FPC, spend your time to help there. Then you will have your compiler

I Would also tend to @tjoe if it comes to Pdf Questions. I don't think you will find a more competent person if it comes to Delphi and PDF https://uberpdf.org