Extract enforceConstraints from assignRows

cmd/qrunproxy/timeline.go

@@ -225,34 +225,35 @@ func (tl *Timeline) buildConstraints() {
 
 func (tl *Timeline) assignRows() {
 	for {
-		found := false
+		if tl.enforceConstraints() {
+			continue
+		}
+		if tl.enforceExclusives() {
+			continue
+		}
+		break
+	}
+}
+
+func (tl *Timeline) enforceConstraints() bool {
 	for _, c := range tl.constraints {
 		switch c.kind {
 		case "same_row":
 			if c.a.row < c.b.row {
 				tl.insertGap(c.a.track, c.a.row)
-					found = true
+				return true
 			} else if c.b.row < c.a.row {
 				tl.insertGap(c.b.track, c.b.row)
-					found = true
+				return true
 			}
 		case "next_row":
 			if c.b.row <= c.a.row {
 				tl.insertGap(c.b.track, c.b.row)
-					found = true
+				return true
 			}
 		}
-			if found {
-				break
-			}
-		}
-		if !found {
-			found = tl.enforceExclusives()
-		}
-		if !found {
-			break
-		}
 	}
+	return false
 }
 
 func (tl *Timeline) enforceExclusives() bool {