PascalUtils is an object library for delphi and FreePascal of data structures that implements syntactic sugar similar to that of other modern languages as far as syntax allows.
Library is tested for
- Embarcadero (R) Delphi 10.3 on Windows 7 Service Pack 1 (Version 6.1, Build 7601, 64-bit Edition)
- Embarcadero (R) Delphi 11.0 Version 28.0.42600.6491 on Windows 10 (Version 10.0, Build 19042, 64-bit Edition)
- FreePascal Compiler (3.2.0) and Lazarus IDE (2.0.10) on Ubuntu Linux 5.8.0-33-generic x86_64
Get the sources and add the source directory to the project search path. For FPC add the source directory to the fpc.cfg file.
Clone the repository git clone https://github.com/isemenkov/pascalutils.
Add the unit you want to use to the uses clause.
TAny class describes a type-safe container for single value.
uses
utils.any;
type
generic TAny<T> = classTOptional class represents an optional value: every TOptional is contains a value, or does not, like in Rust lang.
uses
utils.optional;
type
generic TOptional<T> = classMore details read on wiki page.
Result types typically contain either a returned value or an error, and could provide first-class encapsulation of the common (value, err) pattern ubiquitous throughout Go programs.
uses
utils.result;
type
generic TResult<V, E> = classMore details read on wiki page.
TVoidResult contains Ok flag or error type like in GO or Rust languages. It is a specialized TResult type with no value.
uses
utils.result;
type
generic TVoidResult<E> = classMore details read on wiki page.
TDataSize class provide the interface to manipulate data sizes.
uses
utils.datasize;
type
TDataSize = classMore details read on wiki page.
TTimeInterval class provide the interface to manipulate time intervals.
uses
utils.timeinterval;
type
TTimeInterval = classMore details read on wiki page.
TPair class couples together a pair of values, which may be of different types (T1 and T2). The individual values can be accessed through its public members first and second, like in C++ language.
uses
utils.pair;
type
generic TPair<T1, T2> = classMore details read on wiki page.
TTuple is an object capable to hold a collection of elements. Each element can be of a different type, like in C++ language.
uses
utils.tuple;
type
generic TTuple3<T1, T2, T3> = class
generic TTuple4<T1, T2, T3, T4> = class
generic TTuple5<T1, T2, T3, T4, T5> = class
generic TTuple6<T1, T2, T3, T4, T5, T6> = class
generic TTuple7<T1, T2, T3, T4, T5, T6, T7> = class
generic TTuple8<T1, T2, T3, T4, T5, T6, T7, T8> = class
generic TTuple9<T1, T2, T3, T4, T5, T6, T7, T8, T9> = class
generic TTuple10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> = classMore details read on wiki page.
TVariant is class template which represents a type-safe union. An instance of TVariant at any given time either holds a value of one of its alternative types.
uses
utils.variant;
type
generic TVariant2<T1, T2> = class
generic TVariant3<T1, T2, T3> = class
generic TVariant4<T1, T2, T3, T4> = class
generic TVariant5<T1, T2, T3, T4, T5> = class
generic TVariant6<T1, T2, T3, T4, T5, T6> = class
generic TVariant7<T1, T2, T3, T4, T5, T6, T7> = class
generic TVariant8<T1, T2, T3, T4, T5, T6, T7, T8> = class
generic TVariant9<T1, T2, T3, T4, T5, T6, T7, T8, T9> = class
generic TVariant10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> = classMore details read on wiki page.
Functor is instance of a class with member function Call defined. This member function allows the object to be used with the same syntax as a regular function call, and therefore its type can be used as template parameter when a generic function type is expected.
uses
utils.functor;
type
generic TUnaryFunctor<V, R> = classMore details read on wiki page.
Functor is instance of a class with member function Call defined. This member function allows the object to be used with the same syntax as a regular function call, and therefore its type can be used as template parameter when a generic function type is expected.
uses
utils.functor;
type
generic TBinaryFunctor<V, R> = classMore details read on wiki page.
It is a special compare functor that return 0 (zero) all times. Real values not used. This functor can be used for containers for unsortable values.
uses
utils.functor;
type
TUnsortableFunctor =
class({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor<V, Integer>);More details read on wiki page.
It is a functor which return a negative value if AValue1 should be sorted before AValue2, a positive value if AValue1 should be sorted after AValue2, zero if AValue1 and AValue2 are equal.
uses
utils.functor;
type
generic TDefaultCompareFunctor<V> =
class({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor<V, Integer>)
public
function Call(AValue1, AValue2 : V) : Integer;
end;More details read on wiki page.
It is a functor which return True if AValue1 < AValue2.
uses
utils.functor;
type
generic TDefaultLessFunctor<V> =
class ({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor<V, Boolean>);More details read on wiki page.
It is a functor which return True if AValue1 > AValue2.
uses
utils.functor;
type
generic TDefaultGreaterFunctor<V> =
class ({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor<V, Boolean>);More details read on wiki page.
It is a functor which return True if AValue1 = AValue2.
uses
utils.functor;
type
generic TDefaultEqualFunctor<V> =
class ({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor<V, Boolean>);More details read on wiki page.
It is a functor which return a negative value if pair 1 key should be sorted before pair 2 key, a positive value if pair 1 key should be sorted after pair 2 key, zero if pair 1 key and pair 2 key are equal.
uses
utils.functor, utils.pair;
uses
generic TDefaultPairKeyCompareFunctor<K, V> =
class({$IFDEF FPC}specialize{$ENDIF} TBinaryFunctor
<{$IFDEF FPC}specialize{$ENDIF} TPair<K, V>, Integer>)More details read on wiki page.
API.CString is a wrapper around C language API cstring char * value.
uses
utils.api.cstring;
type
API = class
type
CString = class
end;More details read on wiki page.
TArrayErrorsStack is generic stack over array of T which contains errors codes.
uses
utils.errorsstack;
type
generic TArrayErrorsStack<T> = classMore details read on wiki page.
TListErrorsStack is generic stack over list of T classes which contains errors codes.
uses
utils.errorsstack;
type
generic TListErrorsStack<T> = classMore details read on wiki page.
TForwardIterator is a base class for custom forward direction iterators.
uses
utils.enumerate;
type
generic TForwardIterator<V, Iterator> = classMore details read on wiki page.
TBidirectionalIterator is a base class for custom forward and backward directions iterators.
uses
utils.enumerate;
type
generic TBidirectionalIterator<V, Iterator> = classMore details read on wiki page.
TEnumerator class adds counter to an iterable objects what have iterator based on TForwardIterator or TBidirectionalIterator and returns it (the enumerate object) like in a Python language.
uses
utils.enumerate;
type
generic TEnumerator<V, Iterator> = classMore details read on wiki page.
TFilterEnumerator class provides filtering enumerator by UnaryFunctor.
uses
utils.enumerate, utils.functor;
type
generic TFilterEnumerator<V, Iterator, Functor> = classFunctor is based on utils.functor.TUnaryFunctor interface and used to filtering item value.
More details read on wiki page.
TAccumulate accumulated values using binary functions (specified via the Functor argument).
uses
utils.functional, utils.functor;
type
generic TAccumulate<V, Iterator, Functor> = classFunctor is based on utils.functor.TBinaryFunctor interface and used to accumulate the result value.
More details read on wiki page.
TMap applying the given functor to each item of a given iterable object).
uses
utils.functional, utils.functor;
type
generic TMap<V, Iterator, Functor> = classFunctor is based on utils.functor.TUnaryFunctor interface and used to modify item value.
More details read on wiki page.