ReNamer:Pascal Script:Types
Revision as of 17:42, 4 February 2014 by Den4b (talk | contribs) (→String types: AnsiString and AnsiChar added)
This page lists and explains all supported types in Pascal Script used within ReNamer.
Integer types
| Type | Size | Lowest Value | Highest Value |
|---|---|---|---|
| Byte | 1 byte | 0 | 255 |
| ShortInt | 1 byte | -128 | 127 |
| Word | 2 bytes | 0 | 65,535 |
| SmallInt | 2 bytes | -32,768 | 32,767 |
| Cardinal | 4 bytes | 0 | 4,294,967,295 |
| Integer | 4 bytes | -2,147,483,648 | 2,147,483,647 |
| Int64 | 8 bytes | -9,223,372,036,854,775,808 | 9,223,372,036,854,775,807 |
Floating point types
| Type | Size | Range |
|---|---|---|
| Single | 4 bytes | 1.5 x 10-45 .. 3.4 x 1038 |
| Double | 8 bytes | 5.0 x 10-324 .. 1.7 x 10308 |
| Extended | 10 bytes | 3.6 x 10-4951 .. 1.1 x 104932 |
String types
| Type | Description |
|---|---|
| Char | Stores a single Ansi character. |
| String | Holds a sequence of Ansi characters of any length. |
| AnsiChar | Alias for Char type. |
| AnsiString | Alias for String type. |
| WideChar | Stores a single Unicode character. |
| WideString | Holds a sequence of Unicode characters of any length. |
Note: Unicode article highlights the difference between Unicode and Ansi.
Pointer types
| Type | Description |
|---|---|
| PChar | Pointer to a Char value, and can also be used to point to characters within a string |
Other types
| Type | Description |
|---|---|
| Boolean | Provides an enumeration of the logical True and False values |
| Array | Single and multi dimensional indexable sequences of data |
| Record | Provides means of collecting together a set of different data types into one named structure |
| Variant | Provides a flexible general purpose data type |
Enumerations and Sets
For example, the Boolean data type is itself an enumeration, with two possible values: True and False. If you try to assign a different value to a Boolean variable, the code will not compile.
| Example | Description |
|---|---|
type
TDay = (Mon, Tue, Wed, Thu, Fri, Sat, Sun);
var
Day: TDay;
begin
Day := Mon;
if Day <> Tue then
Day := Wed;
end.
|
An enumeration is simply a fixed range of named values |
type
TDay = (Mon, Tue, Wed, Thu, Fri, Sat, Sun);
TDays = set of TDay;
var
Days: TDays;
begin
Days := [Mon, Tue, Wed];
if Sun in Days then
Days := Days - [Sun];
end.
|
Whereas enumerations allow a variable to have one, and only one, value from a fixed number of values, sets allow you to have any combination of the given values |
Custom types
Several types are custom defined to simplify the usage of some functions.
| Type | Declared as | Description |
|---|---|---|
| TDateTime | Double | Holds date and time |
| TStringsArray | Array of WideString | Holds an indexable sequence of WideString. Deprecated in v5.74.4 Beta. Please use TWideStringArray instead. |
| TWideStringArray | Array of WideString | Holds an indexable sequence of WideString. Added in v5.74.4 Beta. Replaces ambiguous TStringsArray type. |
| TAnsiStringArray | Array of AnsiString | Holds an indexable sequence of AnsiString. Added in v5.74.4 Beta. |