Improve support for invalid identifier characters

This brings parity with the built-in resource generator, which properly
converts |, :, ;, < and > to underscores in the generated member
names.

Fixes #125

Author: kzu

src/ThisAssembly.Strings/CSharp.sbntxt

@@ -18,35 +18,35 @@
 	    /// </summary>
 {{ end }}
 {{ func render }}
-    public static partial class {{ $0.Name }}
+    public static partial class {{ $0.Id }}
     {
         {{~ for value in $0.Values ~}}
 		{{~ if!(value.HasFormat) ~}}
         {{- summary value ~}}
-	    public static string {{ value.Name }} => Strings.GetResourceManager("{{ $1 }}").GetString("{{ $0.Prefix + value.Name }}");
+	    public static string {{ value.Id }} => Strings.GetResourceManager("{{ $1 }}").GetString("{{ value.Name }}");
         {{~ else ~}}
         {{~ if value.IsIndexedFormat ~}}
         {{- summary value ~}}
-	    public static string {{ value.Name }}(
+	    public static string {{ value.Id }}(
             {{- for arg in value.Format -}}
             object arg{{~ arg ~}}{{ if !for.last }}, {{ end }}
             {{- end -}}) 
             => string.Format(
                 CultureInfo.CurrentCulture,
-                Strings.GetResourceManager("{{ $1 }}").GetString("{{ $0.Prefix + value.Name }}"),
+                Strings.GetResourceManager("{{ $1 }}").GetString("{{ value.Name }}"),
                 {{ for arg in value.Format -}}
                 arg{{- arg -}}{{- if !for.last -}}, {{ end }}{{- end -}});
         {{~ else if value.IsNamedFormat ~}}
         {{- summary value ~}}
-	    public static string {{ value.Name }}(
+	    public static string {{ value.Id }}(
             {{- for arg in value.Format -}}
             object {{ arg ~}}{{ if !for.last }}, {{ end }}
             {{- end -}}) 
             => string.Format(
                 CultureInfo.CurrentCulture,
                 Strings
                     .GetResourceManager("{{ $1 }}")
-                    .GetString("{{ $0.Prefix + value.Name }}")
+                    .GetString("{{ value.Name }}")
                     {{- for arg in value.Format }}
                     .Replace("{%{{}%}{{ arg }}{%{}}%}", "{%{{}%}{{ for.index }}{%{}}%}"){{- end -}},
                 {{ for arg in value.Format -}}

src/ThisAssembly.Strings/Model.cs

@@ -15,6 +15,7 @@ record Model(ResourceArea RootArea, string ResourceName)
 static class ResourceFile
 {
     static readonly Regex FormatExpression = new Regex("{(?<name>[^{}]+)}", RegexOptions.Compiled);
+    internal static readonly Regex NameReplaceExpression = new Regex(@"\||:|;|\>|\<", RegexOptions.Compiled);
 
     public static ResourceArea Load(string fileName, string rootArea)
     {
@@ -33,17 +34,18 @@ public static ResourceArea Load(IEnumerable<XElement> data, string rootArea)
         {
             //  Splits: ([resouce area]_)*[resouce name]
             var nameAttribute = element.Attribute("name").Value;
+            var id = NameReplaceExpression.Replace(nameAttribute, "_");
             var valueElement = element.Element("value").Value;
             var comment = element.Element("comment")?.Value?.Replace("<", "&lt;").Replace(">", "&gt;");
-            var areaParts = nameAttribute.Split(new[] { "_" }, StringSplitOptions.RemoveEmptyEntries);
+            var areaParts = id.Split(new[] { "_" }, StringSplitOptions.RemoveEmptyEntries);
             if (areaParts.Length <= 1)
             {
-                root.Values.Add(GetValue(nameAttribute, valueElement) with { Comment = comment });
+                root.Values.Add(GetValue(id, nameAttribute, valueElement) with { Comment = comment });
             }
             else
             {
                 var area = GetArea(root, areaParts.Take(areaParts.Length - 1));
-                var value = GetValue(areaParts.Skip(areaParts.Length - 1).First(), valueElement) with { Comment = comment };
+                var value = GetValue(areaParts.Skip(areaParts.Length - 1).First(), nameAttribute, valueElement) with { Comment = comment };
 
                 area.Values.Add(value);
             }
@@ -65,13 +67,13 @@ static ResourceArea GetArea(ResourceArea area, IEnumerable<string> areaPath)
         var currentArea = area;
         foreach (var areaName in areaPath)
         {
-            var existing = currentArea.NestedAreas.FirstOrDefault(a => a.Name == areaName);
+            var existing = currentArea.NestedAreas.FirstOrDefault(a => a.Id == areaName);
             if (existing == null)
             {
                 if (currentArea.Values.Any(v => v.Name == areaName))
                     throw new ArgumentException(string.Format(
                         "Area name '{0}' is already in use as a value name under area '{1}'.",
-                        areaName, currentArea.Name));
+                        areaName, currentArea.Id));
 
                 existing = new ResourceArea(areaName, currentArea.Prefix + areaName + "_");
                 currentArea.NestedAreas.Add(existing);
@@ -83,9 +85,9 @@ static ResourceArea GetArea(ResourceArea area, IEnumerable<string> areaPath)
         return currentArea;
     }
 
-    static ResourceValue GetValue(string resourceName, string resourceValue)
+    static ResourceValue GetValue(string resourceId, string resourceName, string resourceValue)
     {
-        var value = new ResourceValue(resourceName, resourceValue);
+        var value = new ResourceValue(resourceId, resourceName, resourceValue);
 
         // Parse parameter names
         if (FormatExpression.IsMatch(resourceValue))
@@ -101,15 +103,15 @@ static ResourceValue GetValue(string resourceName, string resourceValue)
     }
 }
 
-[DebuggerDisplay("Name = {Name}, NestedAreas = {NestedAreas.Count}, Values = {Values.Count}")]
-record ResourceArea(string Name, string Prefix)
+[DebuggerDisplay("Id = {Id}, NestedAreas = {NestedAreas.Count}, Values = {Values.Count}")]
+record ResourceArea(string Id, string Prefix)
 {
     public List<ResourceArea> NestedAreas { get; init; } = new List<ResourceArea>();
     public List<ResourceValue> Values { get; init; } = new List<ResourceValue>();
 }
 
-[DebuggerDisplay("{Name} = {Value}")]
-record ResourceValue(string Name, string? Raw)
+[DebuggerDisplay("{Id} = {Value}")]
+record ResourceValue(string Id, string Name, string? Raw)
 {
     public string? Value => Raw?.Replace(Environment.NewLine, "")?.Replace("<", "&lt;")?.Replace(">", "&gt;");
     public string? Comment { get; init; }

src/ThisAssembly.Strings/ThisAssembly.Strings.csproj

@@ -43,5 +43,5 @@ such as "Hello {name}".
   <ItemGroup>
     <EmbeddedResource Include="ThisAssembly.Strings.cs" />
   </ItemGroup>
-
+  
 </Project>

src/ThisAssembly.Tests/Resources.resx

@@ -117,7 +117,7 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <data name="Foo_Bar_Baz" xml:space="preserve">
+  <data name="Foo:Bar&gt;Baz" xml:space="preserve">
     <value>Value</value>
   </data>
   <data name="Foo_Hey" xml:space="preserve">

src/ThisAssembly.Tests/Tests.cs

@@ -5,17 +5,21 @@ namespace ThisAssemblyTests
 {
     public class Tests
     {
+        [Fact]
+        public void CanReadResourceFile()
+            => Assert.NotNull(ResourceFile.Load("Resources.resx", "Strings"));
+
         [Fact]
         public void CanUseConstants()
             => Assert.Equal("Baz", ThisAssembly.Constants.Foo.Bar);
 
         [Fact]
         public void CanUseFileConstants()
-            => Assert.Equal(Path.Combine("Content", "Docs", "License.md"), ThisAssembly.Constants.Content.Docs.License);
+            => Assert.Equal(ThisAssembly.Constants.Content.Docs.License, Path.Combine("Content", "Docs", "License.md"));
 
         [Fact]
         public void CanUseFileConstantLinkedFile()
-            => Assert.Equal(Path.Combine("Included", "Readme.txt"), ThisAssembly.Constants.Included.Readme);
+            => Assert.Equal(ThisAssembly.Constants.Included.Readme, Path.Combine("Included", "Readme.txt"));
 
         [Fact]
         public void CanUseMetadata()

src/ThisAssembly.Tests/ThisAssembly.Tests.csproj

@@ -54,6 +54,10 @@
     </FileConstant>
     <AssemblyMetadata Include="Foo" Value="Bar" />
   </ItemGroup>
+
+  <ItemGroup>
+    <Compile Include="..\ThisAssembly.Strings\Model.cs" Link="Model.cs" />
+  </ItemGroup>
 
   <Target Name="GetDependencyTargetPaths" Returns="@(TargetPathWithTargetPlatformMoniker)">
     <ItemGroup>