Move solution and projects to src

src/Spv.Generator/ConstantKey.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Spv.Generator
+{
+    internal struct ConstantKey : IEquatable<ConstantKey>
+    {
+        private Instruction _constant;
+
+        public ConstantKey(Instruction constant)
+        {
+            _constant = constant;
+        }
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine(_constant.Opcode, _constant.GetHashCodeContent(), _constant.GetHashCodeResultType());
+        }
+
+        public bool Equals(ConstantKey other)
+        {
+            return _constant.Opcode == other._constant.Opcode && _constant.EqualsContent(other._constant) && _constant.EqualsResultType(other._constant);
+        }
+
+        public override bool Equals([NotNullWhen(true)] object obj)
+        {
+            return obj is ConstantKey && Equals((ConstantKey)obj);
+        }
+    }
+}