5 files changed, 132 insertions, 17 deletions

diff --git a/src/api/burn/WixToolset.Mba.Core/VerUtil.cs b/src/api/burn/WixToolset.Mba.Core/VerUtil.cs
index 611f9710..14552310 100644
--- a/src/api/burn/WixToolset.Mba.Core/VerUtil.cs
+++ b/src/api/burn/WixToolset.Mba.Core/VerUtil.cs
@@ -68,6 +68,10 @@ namespace WixToolset.Mba.Core
             public IntPtr rgReleaseLabels;
             public IntPtr cchMetadataOffset;
             public bool fInvalid;
+            public bool fHasMajor;
+            public bool fHasMinor;
+            public bool fHasPatch;
+            public bool fHasRevision;
         }
 
         internal static string VersionStringFromOffset(IntPtr wzVersion, IntPtr cchOffset, int? cchLength = null)
diff --git a/src/api/burn/WixToolset.Mba.Core/VerUtilVersion.cs b/src/api/burn/WixToolset.Mba.Core/VerUtilVersion.cs
index 731dedaf..e0312474 100644
--- a/src/api/burn/WixToolset.Mba.Core/VerUtilVersion.cs
+++ b/src/api/burn/WixToolset.Mba.Core/VerUtilVersion.cs
@@ -25,6 +25,10 @@ namespace WixToolset.Mba.Core
             this.ReleaseLabels = new VerUtilVersionReleaseLabel[version.cReleaseLabels];
             this.Metadata = VerUtil.VersionStringFromOffset(version.sczVersion, version.cchMetadataOffset);
             this.IsInvalid = version.fInvalid;
+            this.HasMajor = version.fHasMajor;
+            this.HasMinor = version.fHasMinor;
+            this.HasPatch = version.fHasPatch;
+            this.HasRevision = version.fHasRevision;
 
             for (var i = 0; i < version.cReleaseLabels; ++i)
             {
@@ -80,6 +84,26 @@ namespace WixToolset.Mba.Core
         /// </summary>
         public bool IsInvalid { get; private set; }
 
+        /// <summary>
+        /// Whether the Major part was specified.
+        /// </summary>
+        public bool HasMajor { get; private set; }
+
+        /// <summary>
+        /// Whether the Minor part was specified.
+        /// </summary>
+        public bool HasMinor { get; private set; }
+
+        /// <summary>
+        /// Whether the Patch part was specified.
+        /// </summary>
+        public bool HasPatch { get; private set; }
+
+        /// <summary>
+        /// Whether the Revision part was specified.
+        /// </summary>
+        public bool HasRevision { get; private set; }
+
         /// <inheritdoc/>
         public void Dispose()
         {
diff --git a/src/api/burn/test/WixToolsetTest.Mba.Core/VerUtilFixture.cs b/src/api/burn/test/WixToolsetTest.Mba.Core/VerUtilFixture.cs
index ceb1b12a..6fb8aced 100644
--- a/src/api/burn/test/WixToolsetTest.Mba.Core/VerUtilFixture.cs
+++ b/src/api/burn/test/WixToolsetTest.Mba.Core/VerUtilFixture.cs
@@ -57,6 +57,10 @@ namespace WixToolsetTest.Mba.Core
             Assert.Empty(parsedVersion.ReleaseLabels);
             Assert.Equal("", parsedVersion.Metadata);
             Assert.False(parsedVersion.IsInvalid);
+            Assert.True(parsedVersion.HasMajor);
+            Assert.True(parsedVersion.HasMinor);
+            Assert.True(parsedVersion.HasPatch);
+            Assert.True(parsedVersion.HasRevision);
         }
 
         [Fact]
@@ -74,6 +78,10 @@ namespace WixToolsetTest.Mba.Core
             Assert.Equal(5, parsedVersion.ReleaseLabels.Length);
             Assert.Equal("+abc123", parsedVersion.Metadata);
             Assert.True(parsedVersion.IsInvalid);
+            Assert.True(parsedVersion.HasMajor);
+            Assert.True(parsedVersion.HasMinor);
+            Assert.True(parsedVersion.HasPatch);
+            Assert.True(parsedVersion.HasRevision);
 
             Assert.Equal("a", parsedVersion.ReleaseLabels[0].Label);
             Assert.False(parsedVersion.ReleaseLabels[0].IsNumeric);
diff --git a/src/api/wix/WixToolset.Data/WixVersion.cs b/src/api/wix/WixToolset.Data/WixVersion.cs
index 2b02bd7d..ab68b55a 100644
--- a/src/api/wix/WixToolset.Data/WixVersion.cs
+++ b/src/api/wix/WixToolset.Data/WixVersion.cs
@@ -22,22 +22,42 @@ namespace WixToolset.Data
         /// <summary>
         /// Gets or sets the major version.
         /// </summary>
-        public uint? Major { get; set; }
+        public uint Major { get; set; }
 
         /// <summary>
         /// Gets or sets the minor version.
         /// </summary>
-        public uint? Minor { get; set; }
+        public uint Minor { get; set; }
 
         /// <summary>
         /// Gets or sets the patch version.
         /// </summary>
-        public uint? Patch { get; set; }
+        public uint Patch { get; set; }
 
         /// <summary>
         /// Gets or sets the revision version.
         /// </summary>
-        public uint? Revision { get; set; }
+        public uint Revision { get; set; }
+
+        /// <summary>
+        /// Gets or sets whether the major version was defined.
+        /// </summary>
+        public bool HasMajor { get; set; }
+
+        /// <summary>
+        /// Gets or sets the whether the minor version was defined.
+        /// </summary>
+        public bool HasMinor { get; set; }
+
+        /// <summary>
+        /// Gets or sets the whether the patch version was defined.
+        /// </summary>
+        public bool HasPatch { get; set; }
+
+        /// <summary>
+        /// Gets or sets the whether the revision version was defined.
+        /// </summary>
+        public bool HasRevision { get; set; }
 
         /// <summary>
         /// Gets or sets the labels in the version.
@@ -143,15 +163,19 @@ namespace WixToolset.Data
                 {
                     case 0:
                         version.Major = part;
+                        version.HasMajor = true;
                         break;
                     case 1:
                         version.Minor = part;
+                        version.HasMinor = true;
                         break;
                     case 2:
                         version.Patch = part;
+                        version.HasPatch = true;
                         break;
                     case 3:
                         version.Revision = part;
+                        version.HasRevision = true;
                         break;
                 }
 
@@ -264,6 +288,7 @@ namespace WixToolset.Data
 
             if (invalid)
             {
+                version = null;
                 return false;
             }
 
diff --git a/src/api/wix/test/WixToolsetTest.Data/WixVerFixture.cs b/src/api/wix/test/WixToolsetTest.Data/WixVerFixture.cs
index 45253460..ffa3213a 100644
--- a/src/api/wix/test/WixToolsetTest.Data/WixVerFixture.cs
+++ b/src/api/wix/test/WixToolsetTest.Data/WixVerFixture.cs
@@ -11,13 +11,15 @@ namespace WixToolsetTest.Data
         [Fact]
         public void CannotParseEmptyStringAsVersion()
         {
-            Assert.False(WixVersion.TryParse(String.Empty, out var _));
+            Assert.False(WixVersion.TryParse(String.Empty, out var version));
+            Assert.Null(version);
         }
 
         [Fact]
         public void CannotParseInvalidStringAsVersion()
         {
-            Assert.False(WixVersion.TryParse("invalid", out var _));
+            Assert.False(WixVersion.TryParse("invalid", out var version));
+            Assert.Null(version);
         }
 
         [Fact]
@@ -29,6 +31,10 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)2, version.Minor);
             Assert.Equal((uint)3, version.Patch);
             Assert.Equal((uint)4, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Null(version.Metadata);
         }
@@ -41,7 +47,11 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)1, version.Major);
             Assert.Equal((uint)2, version.Minor);
             Assert.Equal((uint)3, version.Patch);
-            Assert.Null(version.Revision);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Null(version.Metadata);
         }
@@ -55,6 +65,10 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)2, version.Minor);
             Assert.Equal((uint)3, version.Patch);
             Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Null(version.Metadata);
         }
@@ -66,8 +80,12 @@ namespace WixToolsetTest.Data
             Assert.Null(version.Prefix);
             Assert.Equal((uint)1, version.Major);
             Assert.Equal((uint)2, version.Minor);
-            Assert.Null(version.Patch);
-            Assert.Null(version.Revision);
+            Assert.Equal((uint)0, version.Patch);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.False(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Equal("19", version.Labels[0].Label);
             Assert.Equal((uint)19, version.Labels[0].Numeric);
             Assert.Null(version.Metadata);
@@ -80,8 +98,12 @@ namespace WixToolsetTest.Data
             Assert.Null(version.Prefix);
             Assert.Equal((uint)1, version.Major);
             Assert.Equal((uint)2, version.Minor);
-            Assert.Null(version.Patch);
-            Assert.Null(version.Revision);
+            Assert.Equal((uint)0, version.Patch);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.False(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Equal("2", version.Labels[0].Label);
             Assert.Equal((uint)2, version.Labels[0].Numeric);
             Assert.Equal("0", version.Labels[1].Label);
@@ -97,6 +119,11 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)0, version.Major);
             Assert.Equal((uint)0, version.Minor);
             Assert.Equal((uint)1, version.Patch);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Equal("a", version.Labels[0].Label);
             Assert.Null(version.Labels[0].Numeric);
             Assert.Null(version.Metadata);
@@ -109,8 +136,12 @@ namespace WixToolsetTest.Data
             Assert.Null(version.Prefix);
             Assert.Equal((uint)0, version.Major);
             Assert.Equal((uint)1, version.Minor);
-            Assert.Null(version.Patch);
-            Assert.Null(version.Revision);
+            Assert.Equal((uint)0, version.Patch);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.False(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Equal("a", version.Labels[0].Label);
             Assert.Null(version.Labels[0].Numeric);
             Assert.Equal("000", version.Labels[1].Label);
@@ -126,7 +157,11 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)1, version.Major);
             Assert.Equal((uint)2, version.Minor);
             Assert.Equal((uint)3, version.Patch);
-            Assert.Null(version.Revision);
+            Assert.Equal((uint)0, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.False(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Equal("abcd", version.Metadata);
         }
@@ -134,8 +169,10 @@ namespace WixToolsetTest.Data
         [Fact]
         public void CannotParseUnexpectedContentAsMetadata()
         {
-            Assert.False(WixVersion.TryParse("1.2.3.abcd", out var _));
-            Assert.False(WixVersion.TryParse("1.2.3.-abcd", out var _));
+            Assert.False(WixVersion.TryParse("1.2.3.abcd", out var version));
+            Assert.Null(version);
+            Assert.False(WixVersion.TryParse("1.2.3.-abcd", out version));
+            Assert.Null(version);
         }
 
         [Fact]
@@ -147,6 +184,10 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)20, version.Minor);
             Assert.Equal((uint)30, version.Patch);
             Assert.Equal((uint)40, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Null(version.Metadata);
 
@@ -156,6 +197,10 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)200, version2.Minor);
             Assert.Equal((uint)300, version2.Patch);
             Assert.Equal((uint)400, version2.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Null(version2.Labels);
             Assert.Null(version2.Metadata);
         }
@@ -169,6 +214,10 @@ namespace WixToolsetTest.Data
             Assert.Equal(4294967295, version.Minor);
             Assert.Equal(4294967295, version.Patch);
             Assert.Equal(4294967295, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Null(version.Labels);
             Assert.Null(version.Metadata);
         }
@@ -176,7 +225,8 @@ namespace WixToolsetTest.Data
         [Fact]
         public void CannotParseTooLargeNumbers()
         {
-            Assert.False(WixVersion.TryParse("4294967296.4294967296.4294967296.4294967296", out var _));
+            Assert.False(WixVersion.TryParse("4294967296.4294967296.4294967296.4294967296", out var version));
+            Assert.Null(version);
         }
 
         [Fact]
@@ -188,6 +238,10 @@ namespace WixToolsetTest.Data
             Assert.Equal((uint)2, version.Minor);
             Assert.Equal((uint)3, version.Patch);
             Assert.Equal((uint)4, version.Revision);
+            Assert.True(version.HasMajor);
+            Assert.True(version.HasMinor);
+            Assert.True(version.HasPatch);
+            Assert.True(version.HasRevision);
             Assert.Equal("a", version.Labels[0].Label);
             Assert.Null(version.Labels[0].Numeric);
             Assert.Equal("b", version.Labels[1].Label);