From d6c7073bd72fc5321cf0a6e4ffddfb8e289eac6f Mon Sep 17 00:00:00 2001 From: Hugo Locurcio Date: Mon, 9 Nov 2020 21:48:24 +0100 Subject: Clarify that code in `assert()` should avoid side effects --- modules/gdscript/doc_classes/@GDScript.xml | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'modules/gdscript/doc_classes') diff --git a/modules/gdscript/doc_classes/@GDScript.xml b/modules/gdscript/doc_classes/@GDScript.xml index 95818e5fcf..a3f428c12d 100644 --- a/modules/gdscript/doc_classes/@GDScript.xml +++ b/modules/gdscript/doc_classes/@GDScript.xml @@ -94,14 +94,15 @@ - Asserts that the [code]condition[/code] is [code]true[/code]. If the [code]condition[/code] is [code]false[/code], an error is generated and the program is halted until you resume it. Only executes in debug builds, or when running the game from the editor. Use it for debugging purposes, to make sure a statement is [code]true[/code] during development. + Asserts that the [code]condition[/code] is [code]true[/code]. If the [code]condition[/code] is [code]false[/code], an error is generated. When running from the editor, the running project will also be paused until you resume it. This can be used as a stronger form of [method push_error] for reporting errors to project developers or add-on users. + [b]Note:[/b] For performance reasons, the code inside [method assert] is only executed in debug builds or when running the project from the editor. Don't include code that has side effects in an [method assert] call. Otherwise, the project will behave differently when exported in release mode. The optional [code]message[/code] argument, if given, is shown in addition to the generic "Assertion failed" message. You can use this to provide additional details about why the assertion failed. [codeblock] - # Imagine we always want speed to be between 0 and 20 - speed = -10 + # Imagine we always want speed to be between 0 and 20. + var speed = -10 assert(speed < 20) # True, the program will continue assert(speed >= 0) # False, the program will stop - assert(speed >= 0 && speed < 20) # You can also combine the two conditional statements in one check + assert(speed >= 0 and speed < 20) # You can also combine the two conditional statements in one check assert(speed < 20, "speed = %f, but the speed limit is 20" % speed) # Show a message with clarifying details [/codeblock] -- cgit v1.2.3