Difference between revisions of "sysutils"

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{{sysutils}}
 
{{sysutils}}
  
The [[Unit|unit]] '''<syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight>''' shipped with the [[FPC|FPC’s]] default [[RTL|run-time library]] provides a plethora of system utilities.
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The [[Unit|unit]] '''<syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight>''' shipped with the [[FPC|FPC’s]] default [[RTL|run-time library]] provides many system utilities.
 
It attempts to be as compatible to [[Delphi|Delphi’s]] <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit as possible.
 
It attempts to be as compatible to [[Delphi|Delphi’s]] <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit as possible.
However, the FPC version is available on [[Platform list|all platforms the FPC supports]].
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However, the FPC version is available on [[Platform list|all platforms that the FPC supports]].
You will not find any Windows-related routines or other highly platform-specific functionality.
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It does not contain any Windows-related routines or other highly platform-specific functionality.
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== Notable functionality ==
  
== notable functionality ==
 
 
* [[Format function|<syntaxhighlight lang="pascal" inline>format</syntaxhighlight>]]
 
* [[Format function|<syntaxhighlight lang="pascal" inline>format</syntaxhighlight>]]
* [[Executing External Programs#SysUtils.ExecuteProcess|<syntaxhighlight lang="pascal" inline>executeProcess</syntaxhighlight> for executing external programs]]
 
* several routines making [[TDateTime|<syntaxhighlight lang="pascal" inline>tDateTime</syntaxhighlight>]] usable
 
 
* {{Doc|package=RTL|unit=sysutils|identifier=typehelpers|text=type helpers for all basic data types}}
 
* {{Doc|package=RTL|unit=sysutils|identifier=typehelpers|text=type helpers for all basic data types}}
  
== caveats ==
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== Caveats ==
{{Doc|package=RTL|unit=system|identifier=runtimeerrors|text=If the <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit is included}}, all [[runtime error|run-time errors]] become [[Exceptions|exceptions]], thus virtually forcing you to use a [[Compiler Mode|compiler mode]] (or [[modeswitch|mode switch]]) that allows exception treatment.
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You will need to include <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> in every unit that may throw an exception just to familiarize with the exception classes, even though the unit itself does not use any actual code of it.
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{{Doc|package=RTL|unit=system|identifier=runtimeerrors|text=If the <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit is included}}, all [[runtime error|run-time errors]] become [[Exceptions|exceptions]], which virtually forces you to use a [[Compiler Mode|compiler mode]] (or [[modeswitch|mode switch]]) that allows exception treatment.
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You will need to include <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> in every unit that may throw an exception, even though the unit itself does not use any of the included system utilities.
  
If [[Size Matters|size matters]], using <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> is by design not the smartest choice.
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== See also ==
  
== see also ==
 
 
* {{Doc|package=RTL|unit=sysutils|text=<syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> reference}}
 
* {{Doc|package=RTL|unit=sysutils|text=<syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> reference}}
 
* [http://docwiki.embarcadero.com/Libraries/Sydney/en/System.SysUtils Delphi’s <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit]
 
* [http://docwiki.embarcadero.com/Libraries/Sydney/en/System.SysUtils Delphi’s <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> unit]
* [[libc library|<syntaxhighlight lang="c" inline>libc</syntaxhighlight> library]] <!-- similar in design -->
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* [[libc|<syntaxhighlight lang="pascal" inline>libc</syntaxhighlight>]] <!-- similar in design -->
 
* [[System unit|<syntaxhighlight lang="pascal" inline>system</syntaxhighlight> unit]]
 
* [[System unit|<syntaxhighlight lang="pascal" inline>system</syntaxhighlight> unit]]

Revision as of 22:37, 22 January 2021

English (en) français (fr)

The unit sysUtils shipped with the FPC’s default run-time library provides many system utilities. It attempts to be as compatible to Delphi’s sysUtils unit as possible. However, the FPC version is available on all platforms that the FPC supports. It does not contain any Windows-related routines or other highly platform-specific functionality.

Notable functionality

Caveats

If the sysUtils unit is included, all run-time errors become exceptions, which virtually forces you to use a compiler mode (or mode switch) that allows exception treatment. You will need to include sysUtils in every unit that may throw an exception, even though the unit itself does not use any of the included system utilities.

See also