Add previous parser experiments

1 files changed, 57 insertions, 0 deletions

diff --git a/nandgame/assembler/experiments/parser1.py b/nandgame/assembler/experiments/parser1.py
new file mode 100644
index 0000000..b845688
--- /dev/null
+++ b/nandgame/assembler/experiments/parser1.py
@@ -0,0 +1,57 @@
+# parser.py
+import ply.yacc as yacc
+from lexer import tokens
+
+
+# AST node types
+class Label:
+    def __init__(self, name):
+        self.name = name
+
+
+class Instr:
+    def __init__(self, op, args):
+        self.op = op
+        self.args = args
+
+
+def p_program(p):
+    """program : program line
+    | line"""
+    if len(p) == 2:
+        p[0] = [p[1]]
+    else:
+        p[0] = p[1] + [p[2]]
+
+
+def p_line(p):
+    """line : label
+    | instruction
+    | empty"""
+    p[0] = p[1]
+
+
+def p_label(p):
+    """label : IDENT COLON"""
+    p[0] = Label(p[1])
+
+
+def p_instruction(p):
+    """instruction : MOV REGISTER COMMA NUMBER
+    | ADD REGISTER COMMA REGISTER
+    | JMP IDENT"""
+    op = p[1]
+    args = p[2:]
+    p[0] = Instr(op, args)
+
+
+def p_empty(p):
+    "empty :"
+    p[0] = None
+
+
+def p_error(p):
+    raise SyntaxError("Syntax error")
+
+
+parser = yacc.yacc()