generate/generate.go

@@ -34,6 +34,19 @@ type Message interface {
 	// Method returns the method code of the message.
 	Method() uint16
 }
+
+// canAssign determines if data from the given source tag can be assigned to
+// a Go type represented by destination. It is designed to receive destination
+// values from [generate.Generator.generateCanAssign]. The eventual Go type and
+// the destination tag must come from the same (or hash-equivalent) PDL type.
+func canAssign(destination, source tape.Tag) bool {
+	if destination.Is(source) { return true }
+	if (destination == tape.SBA || destination == tape.LBA) &&
+		(source == tape.SBA || source == tape.LBA) {
+		return true
+	}
+	return false
+}
 `
 
 // Generator converts protocols into Go code.
@@ -585,6 +598,7 @@ func (this *Generator) generateDecodeBranch(hash [16]byte, typ Type) (n int, err
 				nn, err = this.iprintf("for _ = range %s {\n", lengthVar)
 				n += nn; if err != nil { return n, err }
 				this.push()
+					// FIXME: wrong tag var
 					nn, err = this.iprintf("nn, err = tape.Skim(decoder, tag)")
 					n += nn; if err != nil { return n, err }
 					nn, err = this.generateErrorCheck()