tpc6 done

tpc6/tpc6.py

@@ -0,0 +1,79 @@
+import ply.lex as lex
+
+
+reserved = {
+    "function": "FUNC",
+    "program": "PROG",
+    "while": "WHILE",
+    "for": "FOR",
+    "in": "IN",
+    "if": "IF",
+    "else": "ELSE",
+    "int": "INT",
+    "float": "FLOAT",
+}
+
+states = (
+        ('mlcom', "exclusive"),
+)
+
+tokens = ["ID", "NUM","GT", "LT", "COMMENT","OPENCOM","CLOSECOM","DDOT"] + list(reserved.values())
+literals = ",=*+-;{}[]()"
+
+
+def t_ID(t):
+    r"[a-zA-Z_][a-zA-Z_0-9]*"
+    t.type = reserved.get(t.value, "ID")
+    return t
+
+def t_NUM(t):
+    r"\d+(\.\d+)?"
+    if "." in t.value:
+        t.value = float(t.value)
+    else:
+        t.value = int(t.value)
+    return t
+def t_DDOT(t):
+    r"\.\."
+    return t
+
+def t_GT(t):
+    r">"
+    return t 
+
+def t_LT(t):
+    r"<"
+    return t 
+
+def t_INITIAL_OPENCOM(t):
+    r"\/\*"
+    t.lexer.begin('mlcom')
+    return t 
+
+def t_mlcom_CLOSECOM(t):
+    r"\*\/"
+    t.lexer.begin("INITIAL")
+    return t 
+
+def t_COMMENT(t):
+    r"\/\/.*"
+    pass
+
+def t_mlcom_COMMENT(t):
+    r"[^*]+"
+    pass
+
+t_ANY_ignore = " \t\n"
+
+def t_ANY_error(t):
+    print("Illegal character '%s'" % t.value[0])
+    t.lexer.skip(1)
+
+lexer = lex.lex()
+
+f = open("example2","r")
+
+lexer.input(f.read())
+
+for tok in lexer:
+    print(tok)