1 files changed, 65 insertions, 0 deletions
diff --git a/nandgame/assembler/parser_types.py b/nandgame/assembler/parser_types.py
new file mode 100644
index 0000000..6453a44
--- /dev/null
+++ b/nandgame/assembler/parser_types.py
@@ -0,0 +1,65 @@
+from dataclasses import dataclass
+from typing import Any
+
+
+@dataclass
+class Symbol:
+    """Define a symbol"""
+
+    name: str
+
+
+@dataclass
+class Immediate:
+    """An immediate value loaded in a register."""
+
+    value: int
+
+
+@dataclass
+class Address:
+    """An address (used in 2nd stage assembler)."""
+
+    value: int
+
+
+@dataclass
+class Register:
+    """Define a source or dest register"""
+
+    name: str
+
+
+@dataclass
+class AsmLine:
+    lineno: int
+
+
+@dataclass
+class Instruction(AsmLine):
+    opcode: str
+    jumptarget: str
+    dest: Register
+    arg1: Any
+    arg2: Any
+
+    @property
+    def num_args(self) -> int:
+        if self.dest is None:
+            return 0
+        if self.arg1 is None:
+            return 1
+        if self.arg2 is None:
+            return 2
+        return 3
+
+
+@dataclass
+class ErrorInstruction(AsmLine):
+    opcode: str
+    error_message: str
+
+
+@dataclass
+class JumpTarget(AsmLine):
+    label: Symbol