Implementing Variables class + dump and trace

modules/Variables.py

@@ -0,0 +1,68 @@
+import sys
+
+trace_format = '\033[1m -> '
+reset_format = '\033[0m'
+
+class Variables:
+
+    class Variable:
+        types = { "entier": int,
+                  "texte": str,
+                  "booléen": bool,
+                  "liste": list }
+
+        def __init__(self, typ, value = None):
+            assert typ in self.types.keys(), "Ce type de variable est inconnu"
+            self.type = typ
+            assert self.checkType(value, typ), "Le type n'est pas équivalent"
+            self.value = value if (value is not None) else self.default(typ)
+
+        def set(self, value):
+            assert self.checkType(value, self.type), "Le type n'est pas équivalent"
+            self.value = value
+
+        def __str__(self):
+            if self.type == "booléen":
+                return "Vrai" if self.value else "Faux"
+            return f"{self.value}"
+
+        def __repr__(self):
+            if self.type == "texte":
+                return f"\"{self.value}\""
+            return f"{self.value}"
+
+
+        def checkType(self, value, typ) -> bool:
+            return type(value) == self.types[typ]
+
+        def default(self, typ):
+            if typ == "entier":
+                return 0
+            if typ == "texte":
+                return ""
+            if typ == "booléen":
+                return False
+            if typ == "liste":
+                return []
+
+    def __init__(self, trace=False):
+        self.variables = {}
+        self.trace = trace
+
+    def get(self, name):
+        assert name in self.variables, "la variable {name} n'éxiste pas"
+        if self.trace:
+            print(f"{trace_format}accède {name}{reset_format}", file=sys.stdout)
+        return self.variables[name]
+
+    def declare(self, typ, name, value=None):
+        assert name not in self.variables, "la variable {name} existe déjà"
+        self.variables[name] = self.Variable(typ, value)
+        if self.trace:
+            print(f"{trace_format}déclare {name} = {value}{reset_format}", file=sys.stdout)
+
+    def assign(self, name, value):
+        assert name in self.variables, "la variable n'éxiste pas"
+        self.variables[name].set(value)
+        if self.trace:
+            print(f"{trace_format}modifie {name} = {value}{reset_format}", file=sys.stdout)