Initial code drop of the prototype

.vscode/launch.json

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+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
+            "name": ".NET Core Launch (console)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/bin/Debug/net6.0/codesign.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}",
+            // For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
+            "console": "internalConsole",
+            "stopAtEntry": false
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

.vscode/tasks.json

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+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/codesign.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/codesign.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "${workspaceFolder}/codesign.csproj",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

LICENSE

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+MIT License
+
+Copyright (c) 2021 Filip Navara
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Melanzana.BinaryFormat.Generator/DataMemberSymbol.cs

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+using System;
+using System.Collections.Immutable;
+using System.Diagnostics;
+using Microsoft.CodeAnalysis;
+
+namespace BinaryFormat
+{
+    /// <summary>
+    /// Represents a member with no arguments, namely a field or property
+    /// </summary>
+    internal readonly struct DataMemberSymbol
+    {
+        private readonly ISymbol _symbol;
+        public DataMemberSymbol(ISymbol symbol)
+        {
+            Debug.Assert(symbol is
+                IFieldSymbol or
+                IPropertySymbol { Parameters: { Length: 0 }});
+            _symbol = symbol;
+        }
+
+        public ISymbol Symbol => _symbol;
+
+        public ITypeSymbol Type => _symbol switch
+        {
+            IFieldSymbol f => f.Type,
+            IPropertySymbol p => p.Type,
+            _ => throw new InvalidOperationException()
+        };
+
+        public ImmutableArray<Location> Locations => _symbol.Locations;
+
+        public string Name => _symbol.Name;
+    }
+}

Melanzana.BinaryFormat.Generator/Generator.Attribute.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Diagnostics;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Text;
+
+namespace BinaryFormat
+{
+    public partial class Generator : ISourceGenerator
+    {
+        private const string AttributeSource = @"
+#nullable disable
+
+[System.AttributeUsage(System.AttributeTargets.Struct | System.AttributeTargets.Class)]
+internal sealed class GenerateReaderWriterAttribute : System.Attribute
+{
+    public GenerateReaderWriterAttribute() {}
+}
+
+[System.AttributeUsage(System.AttributeTargets.Struct | System.AttributeTargets.Class)]
+internal sealed class BigEndianAttribute : System.Attribute
+{
+    public BigEndianAttribute() {}
+}
+
+[System.AttributeUsage(System.AttributeTargets.Struct | System.AttributeTargets.Class)]
+internal sealed class LittleEndianAttribute : System.Attribute
+{
+    public LittleEndianAttribute() {}
+}
+";
+    }
+}