Difference between revisions of "sysutils"

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== notable functionality ==
 
== notable functionality ==
 
* [[Format function|<syntaxhighlight lang="pascal" inline>format</syntaxhighlight>]]
 
* [[Format function|<syntaxhighlight lang="pascal" inline>format</syntaxhighlight>]]
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* [[Executing External Programs#SysUtils.ExecuteProcess|<syntaxhighlight lang="pascal" inline>executeProcess</syntaxhighlight> for executing external programs]]
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* 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}}
  
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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]], thus virtually forcing you to use a [[Compiler Mode|compiler mode]] (or [[modeswitch|mode switch]]) that allows exception treatment.
 
{{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.
 
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.
 
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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If [[Size Matters|size matters]], using <syntaxhighlight lang="pascal" inline>sysUtils</syntaxhighlight> is by design not the smartest choice.
  
 
== 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|<syntaxhighlight lang="pascal" inline>libc</syntaxhighlight>]] <!-- similar in design -->
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* [[libc library|<syntaxhighlight lang="c" inline>libc</syntaxhighlight> library]] <!-- similar in design -->
 
* [[System unit|<syntaxhighlight lang="pascal" inline>system</syntaxhighlight> unit]]
 
* [[System unit|<syntaxhighlight lang="pascal" inline>system</syntaxhighlight> unit]]

Revision as of 17:07, 22 January 2021

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The unit sysUtils shipped with the FPC’s default run-time library provides a plethora of system utilities. It attempts to be as compatible to Delphi’s sysUtils unit as possible. However, the FPC version is available on all platforms the FPC supports. You will not find 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, thus virtually forcing 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 just to familiarize with the exception classes, even though the unit itself does not use any actual code of it.

If size matters, using sysUtils is by design not the smartest choice.

see also