[language] Add multiple assignments, assignment and definitions are now function calls

ideas.md

@@ -27,22 +27,6 @@ Standard library.
 Default arguments and initial variables values should pass the value check associated with the variable / parameter.
 Issue: dispatch is decided before evaluating default values.
 
----
-
-Syntax modifications:
-
-* on the subject of assignments:
-	- multiple assignments:
-
-	:a, :b = 5, 6
-	a, b = list!($(l) l[3], l[6])
-
-		Easy by interpreting the left operand as a List. And also make this work for for loops.
-
-	- regular operator assignments:
-		Could interpret the left operand as a string when it is an identifier, like how _._ works.
-		Would feel good to have less nodes. But because we can doesn't mean we should. Also Assignment is reused in a few other places.
-
 # Can be done later
 
 Server API.
@@ -55,6 +39,12 @@ Probably wise to look into how other do it. LSP: https://microsoft.github.io/lan
 
 ---
 
+Return system.
+
+Could be reused for exception handling or other purposes if accessible by the user.
+
+---
+
 Reduce the number of AST node types ; try to merge similar node and make simpler individuals nodes if possible by composing them.
 Won't help with performance but make me feel better, and easier to extend. Anselme should be more minimal is possible.