$UNSTABLE

The $UNSTABLE metacommand is used to enable the use of features that have not yet been made a permanent part of the language. Features hidden behind this metacommand may have breaking changes or be removed between releases.

Syntax

$UNSTABLE: {MIDI, HTTP}

Parameters

• The current unstable features are as follows:
  • MIDI allows usage of the $MIDISOUNDFONT metacommand (no longer required, see Availability below)
  • HTTP allows opening HTTP connections using _OPENCLIENT (no longer required, see Availability below)

Description

• $UNSTABLE exists as a way to allow usage of new language features before they are finalized as part of the language.
• Any languages features hidden behind $UNSTABLE may be changed in breaking ways in the next version of QB64-PE.
• Language features that become a permanent part of the language will no longer require $UNSTABLE to be used.
• More than one $UNSTABLE can be used in a program.

Availability

• 

  none

• 

  v3.2.0

• 
• 

  yes

• 

  yes

• 

  yes

• MIDI keyword added in QB64-PE v3.2.0
• HTTP keyword added in QB64-PE v3.5.0
• MIDI keyword no longer required, MIDI support is stable since QB64-PE v3.14.0. See _MIDISOUNDBANK.
• HTTP keyword no longer required, HTTP support is stable since QB64-PE v4.0.0. The _OPENCLIENT HTTP syntax is usable at any time now.

Examples

$UNSTABLE:MIDI ' This line is only allowed when $UNSTABLE:MIDI is used $MIDISOUNDFONT: Default _SNDPLAYFILE "example.mid"

See also

• $MIDISOUNDFONT (deprecated)
• _MIDISOUNDBANK
• _OPENCLIENT

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