Allow multiple "_" fields in reflect.StructOf().

nevkontakte · nevkontakte · commit 6d8aaecd3466 · 2022-07-21T22:51:22.000+01:00
This addresses golang/go#49110 for GopherJS.
diff --git a/compiler/natives/src/reflect/reflect.go b/compiler/natives/src/reflect/reflect.go
@@ -495,7 +495,7 @@ func StructOf(fields []StructField) Type {
 			}
 		}
 
-		if _, dup := fset[name]; dup {
+		if _, dup := fset[name]; dup && name != "_" {
 			panic("reflect.StructOf: duplicate field " + name)
 		}
 		fset[name] = struct{}{}

Original file line number	Diff line number	Diff line change
`@@ -495,7 +495,7 @@ func StructOf(fields []StructField) Type {`
`495`	`495`	`}`
`496`	`496`	`}`
`497`	`497`
`498`		`- if _, dup := fset[name]; dup {`
	`498`	`+ if _, dup := fset[name]; dup && name != "_" {`
`499`	`499`	`panic("reflect.StructOf: duplicate field " + name)`
`500`	`500`	`}`
`501`	`501`	`fset[name] = struct{}{}`