define interfaces

1 files changed, 96 insertions, 0 deletions

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:
+