feat(core/asm): add assembler token, operand, and statement primitives

src/Chip8.Core/Assembly/Statement.cs

@@ -0,0 +1,79 @@
+using System.Collections.Generic;
+
+namespace Chip8.Core.Assembly;
+
+public abstract class Statement
+{
+    protected Statement(SourcePosition position)
+    {
+        this.position = position;
+    }
+
+    public SourcePosition position { get; }
+}
+
+public sealed class LabelStatement : Statement
+{
+    public LabelStatement(string name, SourcePosition position) : base(position)
+    {
+        this.name = name;
+    }
+
+    public string name { get; }
+}
+
+public sealed class ConstantStatement : Statement
+{
+    public ConstantStatement(string name, IReadOnlyList<Token> expression, SourcePosition position) : base(position)
+    {
+        this.name = name;
+        this.expression = expression;
+    }
+
+    public string name { get; }
+    public IReadOnlyList<Token> expression { get; }
+}
+
+public sealed class OrgStatement : Statement
+{
+    public OrgStatement(IReadOnlyList<Token> expression, SourcePosition position) : base(position)
+    {
+        this.expression = expression;
+    }
+
+    public IReadOnlyList<Token> expression { get; }
+}
+
+public sealed class AlignStatement : Statement
+{
+    public AlignStatement(IReadOnlyList<Token> expression, SourcePosition position) : base(position)
+    {
+        this.expression = expression;
+    }
+
+    public IReadOnlyList<Token> expression { get; }
+}
+
+public sealed class DataStatement : Statement
+{
+    public DataStatement(bool word, IReadOnlyList<IReadOnlyList<Token>> items, SourcePosition position) : base(position)
+    {
+        this.word = word;
+        this.items = items;
+    }
+
+    public bool word { get; }
+    public IReadOnlyList<IReadOnlyList<Token>> items { get; }
+}
+
+public sealed class InstructionStatement : Statement
+{
+    public InstructionStatement(string mnemonic, IReadOnlyList<Operand> operands, SourcePosition position) : base(position)
+    {
+        this.mnemonic = mnemonic;
+        this.operands = operands;
+    }
+
+    public string mnemonic { get; }
+    public IReadOnlyList<Operand> operands { get; }
+}