Talk:SyntaxWML - Revision history

Egallager: /* Empty Values */ emulate SineBot

2023-02-27T02:57:29Z

‎Empty Values: emulate SineBot

Celtic Minstrel: Properly attribute that quote to me

2023-02-26T14:18:32Z

Properly attribute that quote to me

Toranks: /* Empty Values */

2023-02-24T21:14:13Z

‎Empty Values

Toranks: /* Empty Values */

2023-02-24T21:13:39Z

‎Empty Values

Meriton: success story for workaround with empty variable

2007-07-15T13:49:04Z

success story for workaround with empty variable

New page

== Empty Values ==

The workaround I posted was helpful to check whether a variable is initialized:

[variable]
name=to_be_tested
equals=$empty
[/variable]

(tested with wesnoth 1.2.5)

Interesting it doesn't work with [set_variable]format=.

[[User:Meriton|Meriton]] 15:49, 15 July 2007 (CEST)

@@ Line 14: / Line 14: @@
 [[User:Meriton|Meriton]] 15:49, 15 July 2007 (CEST)
-Noted by Celtic Minstrel on IRC:
+:Noted by Celtic Minstrel on IRC:
 <blockquote>
 There are two variables, so two pipes should be fine.
@@ Line 34: / Line 34: @@
 </blockquote>
-https://discord.com/channels/231976805987385345/442775044590927873/1078750511475470396
+:https://discord.com/channels/231976805987385345/442775044590927873/1078750511475470396 <small><span class="autosigned">—&nbsp;Preceding [https://en.wikipedia.org/wiki/Wikipedia:Signatures unsigned] comment added by [[User:Toranks|Toranks]] ([[User talk:Toranks|talk]] • [[Special:Contributions/Toranks|contribs]]) 13:23, 8 August 2010 (UTC)</span></small><!-- Template:Unsigned -->

@@ Line 14: / Line 14: @@
 [[User:Meriton|Meriton]] 15:49, 15 July 2007 (CEST)
 In fact, as long as there's whitespace after it, no pipes would also be fine.
@@ Line 19: / Line 22: @@
 The pipe is an optional part of the syntax used to disambiguate where the variable name ends if it's not otherwise clear.
-What should happen when the game processes $metal_reserve$attacker_side|| is:
+What should happen when the game processes <code>$metal_reserve$attacker_side||</code> is:
-. Substitute in $attacker_side| to get eg $metal_reserve4|
+# Substitute in <code>$attacker_side|</code> to get eg <code>$metal_reserve4|</code>
+# Substitute in <code>$metal_reserve4|</code> to get 12 or whatever.
 Substitutions always happen from right to left.
@@ Line 29: / Line 31: @@
 And if there's a pipe, the substitution removes it.
-So having only 1 pipe would mean that $metal_reserve|stuff tries to read the variable metal_reserve4stuff instead of metal_reserve4 which is likely not the intention. Thus, always better to match the number of pipes to the number of $'s in this type of situation, unless you know that's not what you want.
+So having only 1 pipe would mean that <code>metal_reserve|stuff</code> tries to read the variable metal_reserve4stuff instead of metal_reserve4 which is likely not the intention. Thus, always better to match the number of pipes to the number of $'s in this type of situation, unless you know that's not what you want
 https://discord.com/channels/231976805987385345/442775044590927873/1078750511475470396

@@ Line 16: / Line 16: @@
 In fact, as long as there's whitespace after it, no pipes would also be fine.
 The pipe is an optional part of the syntax used to disambiguate where the variable name ends if it's not otherwise clear.
 What should happen when the game processes $metal_reserve$attacker_side|| is:
 . Substitute in $attacker_side| to get eg $metal_reserve4|
 . Substitute in $metal_reserve4| to get 12 or whatever.
 Substitutions always happen from right to left.
 And if there's a pipe, the substitution removes it.
 So having only 1 pipe would mean that $metal_reserve|stuff tries to read the variable metal_reserve4stuff instead of metal_reserve4 which is likely not the intention. Thus, always better to match the number of pipes to the number of $'s in this type of situation, unless you know that's not what you want.
 https://discord.com/channels/231976805987385345/442775044590927873/1078750511475470396

← Older revision		Revision as of 21:13, 24 February 2023
Line 13:		Line 13:

	[[User:Meriton\|Meriton]] 15:49, 15 July 2007 (CEST)		[[User:Meriton\|Meriton]] 15:49, 15 July 2007 (CEST)
		+
		+
		+	In fact, as long as there's whitespace after it, no pipes would also be fine.
		+	The pipe is an optional part of the syntax used to disambiguate where the variable name ends if it's not otherwise clear.
		+	What should happen when the game processes $metal_reserve$attacker_side\|\| is:
		+	1. Substitute in $attacker_side\| to get eg $metal_reserve4\|
		+	2. Substitute in $metal_reserve4\| to get 12 or whatever.
		+	Substitutions always happen from right to left.
		+	And if there's a pipe, the substitution removes it.
		+	So having only 1 pipe would mean that $metal_reserve\|stuff tries to read the variable metal_reserve4stuff instead of metal_reserve4 which is likely not the intention. Thus, always better to match the number of pipes to the number of $'s in this type of situation, unless you know that's not what you want.
		+
		+	https://discord.com/channels/231976805987385345/442775044590927873/1078750511475470396