1 files changed, 82 insertions, 0 deletions
diff --git a/nandgame/assembler/experiments/parser3.py b/nandgame/assembler/experiments/parser3.py
new file mode 100644
index 0000000..f62f2e7
--- /dev/null
+++ b/nandgame/assembler/experiments/parser3.py
@@ -0,0 +1,82 @@
+# parser.py
+import ply.yacc as yacc
+from lexer import tokens
+
+# --- AST node types ---
+
+
+class Label:
+    def __init__(self, name):
+        self.name = name
+
+    def __repr__(self):
+        return f"Label({self.name!r})"
+
+
+class Instr:
+    def __init__(self, op, args):
+        self.op = op  # "mov", "add", "jmp"
+        self.args = args  # list of operands
+
+    def __repr__(self):
+        return f"Instr({self.op!r}, {self.args!r})"
+
+
+# --- Grammar ---
+
+
+def p_program(p):
+    """program : lines"""
+    p[0] = p[1]
+
+
+def p_lines_multi(p):
+    """lines : lines line"""
+    # p[1] is the list so far, p[2] is a single line (Label or Instr)
+    p[0] = p[1]
+    if p[2] is not None:
+        p[0].append(p[2])
+
+
+def p_lines_single(p):
+    """lines : line"""
+    # start list with the single line (unless it's None; but we never produce None here)
+    p[0] = [p[1]] if p[1] is not None else []
+
+
+def p_line(p):
+    """line : label
+    | instruction"""
+    p[0] = p[1]
+
+
+def p_label(p):
+    """label : IDENT COLON"""
+    p[0] = Label(p[1])
+
+
+def p_instruction_mov(p):
+    """instruction : MOV REGISTER COMMA NUMBER"""
+    # mov A, #123
+    p[0] = Instr("mov", [p[2], p[4]])
+
+
+def p_instruction_add(p):
+    """instruction : ADD REGISTER COMMA REGISTER"""
+    # add B, A
+    p[0] = Instr("add", [p[2], p[4]])
+
+
+def p_instruction_jmp(p):
+    """instruction : JMP IDENT"""
+    # jmp label
+    p[0] = Instr("jmp", [p[2]])
+
+
+def p_error(p):
+    if p is None:
+        raise SyntaxError("Syntax error at EOF")
+    else:
+        raise SyntaxError(f"Syntax error at {p.value!r} (type {p.type})")
+
+parser = yacc.yacc()