i think its ready

README.md

@@ -1,5 +1,19 @@
-# Todo
+# CPQ
 
-- [ ] Error handling(so it wont just print sly: unexpected token or whatever it says)
-- [ ] Proper readme about files
-- [x] Make cpq.py act as a cmd util - get input and output and such
+cpq.py compiles a cpl source file (.ou) into a quad ir file (.qud) using sly as the lexer and parser.
+
+## Usage
+
+```
+python cpq.py source_file.ou
+```
+
+## Structure
+
+The compiler is seperated into multiple files:
+
+- helper.py: contains a helper function (print_err) 
+- items.py: contains data structs for the parser
+- lexer.py: lexer class
+- parser.py: parser class
+- cpq.py: main program and cmd handling logic

cpq.py

@@ -8,13 +8,15 @@ from lexer import Lexer
 from parser import Parser
 from helper import print_err
 
-
+# print signature
 print_err('Aviv Romem')
 
+# invalid usage
 if len(sys.argv) != 2 or not sys.argv[1].endswith('.ou'):
     print('USAGE: python cpq.py <file-name>.ou')
     exit(1)
 
+# load file and parser
 file = sys.argv[1]
 output = file[:-3] + '.qud'
 f = open(file, 'r')
@@ -24,7 +26,7 @@ lexer = Lexer()
 parser = Parser()
 
 file = sys.argv[1]
-
+# parse and write file if valid
 parser.parse(lexer.tokenize(text))
 if not parser.had_errors:
     f = open(output, 'w')

helper.py

@@ -1,4 +1,5 @@
 import sys
 
 def print_err(*args, **kwargs):
+    ''' print to stderr '''
     print(*args, file=sys.stderr, **kwargs)

lexer.py

@@ -44,5 +44,5 @@ class Lexer(sly.Lexer):
         self.lineno += t.value.count('\n')
     
     def error(self, t):
-        print(f"Error at line {self.lineno}: unexpect character {t.value[0]}")
+        print(f"Error at line {self.lineno}: Unexpected character {t.value[0]}")
         self.index += 1

parser.py

@@ -6,9 +6,6 @@ from items import *
 # Notes from reading:
 # - it seems no scoping is needed, as it contains only one scope per program
 
-
-
-
 class Parser(sly.Parser):
     tokens = Lexer.tokens
     symbol_table = {}

test.qud

@@ -1,29 +0,0 @@
-ILSS t_1 a 10
-JMPZ 15 t_1
-IADD t_2 a 1
-IASN a t_2
-ILSS t_3 a 6
-IEQL t_3 t_3 0
-IEQL t_4 a 5
-IADD t_5 t_3 t_4
-JMPZ 12 t_5
-JUMP 15
-JUMP 14
-IADD t_6 a 0
-IASN a t_6
-JUMP 1
-IPRT a
-IMLT t_7 a 5
-IEQL t_8 t_7 1
-JMPZ 22 t_8
-IASN a 5
-JUMP 27
-JUMP 24
-IEQL t_8 t_7 5
-JMPZ 26 t_8
-IPRT a
-JUMP 26
-JUMP 27
-IPRT a
-HALT
-Aviv Romem