From ca832cb706d6a2d49d049b0ba827f606331269c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benedikt=20B=C3=B6hm?= <bb@xnull.de>
Date: Tue, 19 May 2009 17:20:48 +0200
Subject: define interfaces
---
src/front/__init__.py | 7 ++++
src/front/inter/__init__.py | 0
src/front/lexer.py | 62 ++++++++++++++++++++++++++++
src/front/lexer/__init__.py | 0
src/front/parser.py | 96 +++++++++++++++++++++++++++++++++++++++++++
src/front/parser/__init__.py | 0
src/front/symbols.py | 9 ++++
src/front/symbols/__init__.py | 0
8 files changed, 174 insertions(+)
delete mode 100644 src/front/inter/__init__.py
create mode 100644 src/front/lexer.py
delete mode 100644 src/front/lexer/__init__.py
create mode 100644 src/front/parser.py
delete mode 100644 src/front/parser/__init__.py
create mode 100644 src/front/symbols.py
delete mode 100644 src/front/symbols/__init__.py
(limited to 'src')
diff --git a/src/front/__init__.py b/src/front/__init__.py
index e69de29..63529ef 100644
--- a/src/front/__init__.py
+++ b/src/front/__init__.py
@@ -0,0 +1,7 @@
+from front.lexer import Lexer
+from front.parser import Parser
+
+def main():
+ lex = Lexer()
+ parse = Parser(lex)
+ parse.program()
diff --git a/src/front/inter/__init__.py b/src/front/inter/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/front/lexer.py b/src/front/lexer.py
new file mode 100644
index 0000000..aca7473
--- /dev/null
+++ b/src/front/lexer.py
@@ -0,0 +1,62 @@
+class Lexer:
+ line = 1
+
+ def __init__(self):
+ return
+
+ def reserve(self, word):
+ return
+
+ def scan():
+ return
+
+class Tag:
+ # lexer tokens
+ NUMBER = 1
+ TRUE = 2
+ FALSE = 3
+ IDENT = 4
+ WHILE = 5
+ IF = 6
+ ELSE = 7
+ END = 8
+ LBRAK = 9
+ RBRAK = 10
+ LPAREN = 11
+ RPAREN = 12
+ NEWLINE = 13
+ COMMA = 14
+ FUN = 15
+ ASSIGNMENT = 16
+ RETURN = 17
+ OPERATOR = 18
+
+ # parser tokens
+ BOOL = 19
+ JOIN = 20
+ EQUALITY = 21
+ RELATION = 22
+ EXPRESSION = 23
+ TERM = 24
+ UNARY = 25
+ FACTOR = 26
+ IDENT_LIST = 27
+ EXPRESSION_LIST = 28
+ PROGRAM = 29
+ FUNCTION = 30
+ STATEMENT = 31
+ STATEMENTS = 32
+ IF_STATEMENT = 33
+ WHILE_STATEMENT = 34
+ RETURN_STATEMENT = 35
+ ASSIGN_STATEMENT = 36
+ FUNCTION_CALL = 37
+
+class Token:
+ tag = None
+
+ def __init__(self, tag):
+ return
+
+ def __str__(self):
+ return
diff --git a/src/front/lexer/__init__.py b/src/front/lexer/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/front/parser.py b/src/front/parser.py
new file mode 100644
index 0000000..950a77c
--- /dev/null
+++ b/src/front/parser.py
@@ -0,0 +1,96 @@
+class Parser:
+ lexer = None
+
+ def __init__(self, lexer):
+ return
+
+ def parse(self):
+ return self.program()
+
+ def move(self):
+ return
+
+ def error(self, msg):
+ return
+
+ def match(tag):
+ return
+
+ # bool = bool "||" join | join.
+ def bool(self):
+ return
+
+ # join = join "&&" equality | equality.
+ def join(self):
+ return
+
+ # equality = equality "==" relation | equality "!=" relation | relation.
+ def equality(self):
+ return
+
+ # relation = expression "<" expression | expression "<=" expression | expression ">=" expression | expression ">" expression | expression.
+ def relation(self):
+ return
+
+ # expression = expression "+" term | expression "-" term | term.
+ def expression(self):
+ return
+
+ # term = term "*" unary | term "/" unary | unary.
+ def term(self):
+ return
+
+ # unary = "!" unary | "-" unary | factor.
+ def unary(self):
+ return
+
+ # factor = "(" bool ")" | ident | integer | "true" | "false".
+ def factor(self):
+ return
+
+ # ident_list = ident { "," ident }.
+ def ident_list(self):
+ return
+
+ # expression_list = expression { "," expression }.
+ def expression_list(self):
+ return
+
+ # program = function { function }.
+ def program(self):
+ return
+
+ # function = "fun" ident "[" [ ident_list ] "]" statements "end".
+ def function(self):
+ return
+
+ # statements = statement { nl statement }.
+ def statements(self):
+ return
+
+ # statement = [ if_statement | while_statement | assignment | function_call | return_statement ].
+ def statement(self):
+ return
+
+ # if_statement = "if" expression statements [ "else" statements ] "end".
+ def if_statement(self):
+ return
+
+ # while_statement = "while" expression statements "end".
+ def while_statement(self):
+ return
+
+ # assignment = ident "=" expression.
+ def assignment(self):
+ return
+
+ # function_call = ident "[" [ expression_list ] "]".
+ def function_call(self):
+ return
+
+ # return_statement = "@" expression.
+ def return_statement(self):
+ return
+
+class ParseTree:
+
diff --git a/src/front/parser/__init__.py b/src/front/parser/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/src/front/symbols.py b/src/front/symbols.py
new file mode 100644
index 0000000..f4ab40e
--- /dev/null
+++ b/src/front/symbols.py
@@ -0,0 +1,9 @@
+class SymbolTable:
+ def __init__(self):
+ return
+
+ def put(token, id):
+ return
+
+ def get(token):
+ return
diff --git a/src/front/symbols/__init__.py b/src/front/symbols/__init__.py
deleted file mode 100644
index e69de29..0000000
--
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