Allow alias this to use assignment-style syntax

pbackus · pbackus · commit 34b6eee50753 · 2023-04-23T15:53:46.000-04:00
See DMD PR for rationale: dlang/dmd#15122
diff --git a/spec/struct.dd b/spec/struct.dd
@@ -2011,6 +2011,7 @@ $(H2 $(LEGACY_LNAME2 AliasThis, alias-this, Alias This))
 $(GRAMMAR
 $(GNAME AliasThis):
     $(D alias) $(GLINK_LEX Identifier) $(D this ;)
+    $(D alias) $(D this) $(D =) $(GLINK_LEX Identifier) $(D ;)
 )
 
         $(P An $(I AliasThis) declaration names a member to subtype.

Original file line number	Diff line number	Diff line change
`@@ -2011,6 +2011,7 @@ $(H2 $(LEGACY_LNAME2 AliasThis, alias-this, Alias This))`
`2011`	`2011`	`$(GRAMMAR`
`2012`	`2012`	`$(GNAME AliasThis):`
`2013`	`2013`	`$(D alias) $(GLINK_LEX Identifier) $(D this ;)`
	`2014`	`+ $(D alias) $(D this) $(D =) $(GLINK_LEX Identifier) $(D ;)`
`2014`	`2015`	`)`
`2015`	`2016`
`2016`	`2017`	`$(P An $(I AliasThis) declaration names a member to subtype.`