From: Daniel Arndt <arndtd@ornl.gov>
Date: Tue, 23 Jun 2020 16:07:47 +0000 (-0400)
Subject: Add missing forward declaration in slepc_spectral_transformation.h
X-Git-Tag: v9.3.0-rc1~1392^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff745e29723024da8e6363161424102535709483;p=dealii.git

Add missing forward declaration in slepc_spectral_transformation.h

Co-authored-by: Alex Kokomov <KokomovAlex@gmail.com>
---

diff --git a/include/deal.II/lac/slepc_spectral_transformation.h b/include/deal.II/lac/slepc_spectral_transformation.h
index 12ed606d84..da6a94767d 100644
--- a/include/deal.II/lac/slepc_spectral_transformation.h
+++ b/include/deal.II/lac/slepc_spectral_transformation.h
@@ -44,6 +44,9 @@ namespace PETScWrappers
 
 namespace SLEPcWrappers
 {
+  // forward declaration
+  class SolverBase;
+
   /**
    * Base class for spectral transformation classes using the SLEPc solvers
    * which are selected based on flags passed to the spectral transformation.