Add previous parser experiments

1 files changed, 52 insertions, 0 deletions

diff --git a/nandgame/assembler/experiments/lexer1.py b/nandgame/assembler/experiments/lexer1.py
new file mode 100644
index 0000000..515a792
--- /dev/null
+++ b/nandgame/assembler/experiments/lexer1.py
@@ -0,0 +1,52 @@
+# lexer.py
+import ply.lex as lex
+
+tokens = (
+    "MOV",
+    "ADD",
+    "JMP",
+    "REGISTER",
+    "NUMBER",
+    "IDENT",
+    "COMMA",
+    "COLON",
+)
+
+t_COMMA = r","
+t_COLON = r":"
+
+t_MOV = r"mov"
+t_ADD = r"add"
+t_JMP = r"jmp"
+
+
+def t_REGISTER(t):
+    r"[A-Z]"
+    return t
+
+
+def t_NUMBER(t):
+    r"\#[0-9]+"
+    t.value = int(t.value[1:])
+    return t
+
+
+def t_IDENT(t):
+    r"[a-zA-Z_][a-zA-Z0-9_]*"
+    return t
+
+
+t_ignore = " \t"
+
+
+def t_newline(t):
+    r"\n+"
+    lexer.lineno += 1
+    pass
+
+
+def t_error(t):
+    raise SyntaxError(f"Illegal character {t.value[0]!r}")
+
+
+lexer = lex.lex()