adapt parser for backend changes

- emit a prologue/epilogue for functions
- emit a "JMP main" instruction in the beginning
- track the last function label across genrate calls
- split scope in params and local variables (they have a different
  layout on the stack)

1 files changed, 3 insertions, 2 deletions

diff --git a/src/front/parser.py b/src/front/parser.py
index 53818bc..8eca7a2 100644
--- a/src/front/parser.py
+++ b/src/front/parser.py
@@ -144,7 +144,8 @@ class Parser:
         self.match(Tag.LBRAK)
         args = [] if self.token.tag == Tag.RBRAK else self.ident_list()
         self.match(Tag.RBRAK, Tag.NEWLINE)
-        self.scope.new(name, args)
+        self.scope.new(name)
+        self.scope.add_params(args)
         block = self.statement_list()
         self.match(Tag.END, Tag.NEWLINE)
         return Function(name, args, block, line)
@@ -198,7 +199,7 @@ class Parser:
         self.match(Tag.ASSIGNMENT)
         exp = self.boolean()
         self.match(Tag.NEWLINE)
-        self.scope.add(name)
+        self.scope.add_locals(name)
         return AssignStatement(name, exp, line)
 
     # program = function_list.