Difference between revisions of "PtrInt"
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Jump to navigationJump to search (Created page with "'''PtrInt''' is signed integer type which has the same SizeOf as Pointer. '''PtrUInt''' is unsigned integer type which has the same SizeOf as Pointer.") |
(add pronunciation of ptrUInt) |
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| − | ''' | + | The data types '''{{Doc|package=RTL|unit=system|identifier=ptrint|text=<syntaxhighlight lang="delphi" inline>ptrInt</syntaxhighlight>}}''' (“Peter Int”) and '''{{Doc|package=RTL|unit=system|identifier=ptruint|text=<syntaxhighlight lang="delphi" inline>ptrUInt</syntaxhighlight>}}''' (“Pee true Int”) are signed and unsigned [[Integer|<syntaxhighlight lang="pascal" inline>integer</syntaxhighlight>]] [[Data type|data types]] respectively having the same [[SizeOf|<syntaxhighlight lang="delphi" inline>sizeOf</syntaxhighlight>]] of a [[Pointer|<syntaxhighlight lang="delphi" inline>pointer</syntaxhighlight>]]. |
| − | + | == application == | |
| + | * Use <syntaxhighlight lang="delphi" inline>ptrUInt</syntaxhighlight> if an <syntaxhighlight lang="pascal" inline>integer</syntaxhighlight> value will eventually be [[Typecast|typecasted]] to a <syntaxhighlight lang="delphi" inline>pointer</syntaxhighlight>. | ||
| + | * Regardless of the size taken up by its elements, an [[Array|<syntaxhighlight lang="pascal" inline>array</syntaxhighlight>]] cannot have more than <syntaxhighlight lang="delphi" inline>high(ptrInt)</syntaxhighlight> elements. Additionally, the range type must be a subrange of <syntaxhighlight lang="delphi" inline>ptrInt</syntaxhighlight>.<sup>[https://www.freepascal.org/docs-html/current/user/userse62.html]</sup> | ||
| + | |||
| + | == notes == | ||
| + | * <syntaxhighlight lang="delphi" inline>PtrInt</syntaxhighlight>/<syntaxhighlight lang="delphi" inline>ptrUInt</syntaxhighlight> are not necessarily the same size of <syntaxhighlight lang="delphi" inline>ALUSInt</syntaxhighlight>/<syntaxhighlight lang="delphi" inline>ALUUInt</syntaxhighlight>. | ||
| + | * The introduction of <syntaxhighlight lang="delphi" inline>ptrInt</syntaxhighlight> was a mistake. New code should not use it. | ||
| + | * {{Doc|package=RTL|unit=system|identifier=intptr|text=<syntaxhighlight lang="delphi" inline>IntPtr</syntaxhighlight>}} and {{Doc|package=RTL|unit=system|identifier=nativeint|text=<syntaxhighlight lang="delphi" inline>nativeInt</syntaxhighlight>}} are aliases for <syntaxhighlight lang="delphi" inline>ptrInt</syntaxhighlight>. | ||
| + | * {{Doc|package=RTL|unit=system|identifier=uintptr|text=<syntaxhighlight lang="delphi" inline>UIntPtr</syntaxhighlight>}} and {{Doc|package=RTL|unit=system|identifier=nativeint|text=<syntaxhighlight lang="delphi" inline>nativeUInt</syntaxhighlight>}} are aliases for <syntaxhighlight lang="delphi" inline>ptrUInt</syntaxhighlight>. | ||
| + | * <syntaxhighlight lang="delphi" inline>PtrInt</syntaxhighlight> and <syntaxhighlight lang="delphi" inline>ptrUInt</syntaxhighlight> are redefined by the <syntaxhighlight lang="delphi" inline>unit</syntaxhighlight> <syntaxhighlight lang="delphi" inline>unicodeData</syntaxhighlight>. | ||
| + | |||
| + | [[Category: Data types]] | ||
| + | [[Category: FPC]] | ||
Latest revision as of 18:26, 25 January 2022
The data types ptrInt (“Peter Int”) and ptrUInt (“Pee true Int”) are signed and unsigned integer data types respectively having the same sizeOf of a pointer.
application
- Use
ptrUIntif anintegervalue will eventually be typecasted to apointer. - Regardless of the size taken up by its elements, an
arraycannot have more thanhigh(ptrInt)elements. Additionally, the range type must be a subrange ofptrInt.[1]
notes
PtrInt/ptrUIntare not necessarily the same size ofALUSInt/ALUUInt.- The introduction of
ptrIntwas a mistake. New code should not use it. IntPtrandnativeIntare aliases forptrInt.UIntPtrandnativeUIntare aliases forptrUInt.PtrIntandptrUIntare redefined by theunitunicodeData.
