Ports review

src/andromede/expression/context_adder.py

@@ -38,12 +38,12 @@ def variable(self, node: VariableNode) -> ExpressionNode:
     def parameter(self, node: ParameterNode) -> ExpressionNode:
         return ComponentParameterNode(self.component_id, node.name)
 
-    def comp_parameter(self, node: ComponentParameterNode) -> ExpressionNode:
+    def comp_variable(self, node: ComponentVariableNode) -> ExpressionNode:
         raise ValueError(
             "This expression has already been associated to another component."
         )
 
-    def comp_variable(self, node: ComponentVariableNode) -> ExpressionNode:
+    def comp_parameter(self, node: ComponentParameterNode) -> ExpressionNode:
         raise ValueError(
             "This expression has already been associated to another component."
         )

src/andromede/expression/copy.py

@@ -43,12 +43,6 @@ class CopyVisitor(ExpressionVisitorOperations[ExpressionNode]):
     Simply copies the whole AST.
     """
 
-    def comp_parameter(self, node: ComponentParameterNode) -> ExpressionNode:
-        return ComponentParameterNode(node.component_id, node.name)
-
-    def comp_variable(self, node: ComponentVariableNode) -> ExpressionNode:
-        return ComponentVariableNode(node.component_id, node.name)
-
     def literal(self, node: LiteralNode) -> ExpressionNode:
         return LiteralNode(node.value)
 
@@ -63,6 +57,12 @@ def variable(self, node: VariableNode) -> ExpressionNode:
     def parameter(self, node: ParameterNode) -> ExpressionNode:
         return ParameterNode(node.name)
 
+    def comp_variable(self, node: ComponentVariableNode) -> ExpressionNode:
+        return ComponentVariableNode(node.component_id, node.name)
+
+    def comp_parameter(self, node: ComponentParameterNode) -> ExpressionNode:
+        return ComponentParameterNode(node.component_id, node.name)
+
     def copy_expression_range(
         self, expression_range: ExpressionRange
     ) -> ExpressionRange:

src/andromede/expression/degree.py

@@ -41,12 +41,6 @@ class ExpressionDegreeVisitor(ExpressionVisitor[int]):
     Computes degree of expression with respect to variables.
     """
 
-    def comp_parameter(self, node: ComponentParameterNode) -> int:
-        return 0
-
-    def comp_variable(self, node: ComponentVariableNode) -> int:
-        return 1
-
     def literal(self, node: LiteralNode) -> int:
         return 0
 
@@ -78,6 +72,12 @@ def variable(self, node: VariableNode) -> int:
     def parameter(self, node: ParameterNode) -> int:
         return 0
 
+    def comp_variable(self, node: ComponentVariableNode) -> int:
+        return 1
+
+    def comp_parameter(self, node: ComponentParameterNode) -> int:
+        return 0
+
     def time_operator(self, node: TimeOperatorNode) -> int:
         if node.name in ["TimeShift", "TimeEvaluation"]:
             return visit(node.operand, self)

src/andromede/expression/evaluate.py

@@ -102,12 +102,6 @@ class EvaluationVisitor(ExpressionVisitorOperations[float]):
 
     context: ValueProvider
 
-    def comp_parameter(self, node: ComponentParameterNode) -> float:
-        return self.context.get_component_parameter_value(node.component_id, node.name)
-
-    def comp_variable(self, node: ComponentVariableNode) -> float:
-        return self.context.get_component_variable_value(node.component_id, node.name)
-
     def literal(self, node: LiteralNode) -> float:
         return node.value
 
@@ -120,6 +114,12 @@ def variable(self, node: VariableNode) -> float:
     def parameter(self, node: ParameterNode) -> float:
         return self.context.get_parameter_value(node.name)
 
+    def comp_parameter(self, node: ComponentParameterNode) -> float:
+        return self.context.get_component_parameter_value(node.component_id, node.name)
+
+    def comp_variable(self, node: ComponentVariableNode) -> float:
+        return self.context.get_component_variable_value(node.component_id, node.name)
+
     def time_operator(self, node: TimeOperatorNode) -> float:
         raise NotImplementedError()
 

src/andromede/expression/expression.py

@@ -179,6 +179,14 @@ def param(name: str) -> ParameterNode:
 
 @dataclass(frozen=True, eq=False)
 class ComponentParameterNode(ExpressionNode):
+    """
+    Represents one parameter of one component.
+
+    When building actual equations for a system,
+    we need to associated each parameter to its
+    actual component, at some point.
+    """
+
     component_id: str
     name: str
 
@@ -189,6 +197,14 @@ def comp_param(component_id: str, name: str) -> ComponentParameterNode:
 
 @dataclass(frozen=True, eq=False)
 class ComponentVariableNode(ExpressionNode):
+    """
+    Represents one variable of one component.
+
+    When building actual equations for a system,
+    we need to associated each variable to its
+    actual component, at some point.
+    """
+
     component_id: str
     name: str
 
@@ -321,6 +337,15 @@ def expression_range(
 
 
 class InstancesTimeIndex:
+    """
+    Defines a set of time indices on which a time operator operates.
+
+    In particular, it defines time indices created by the shift operator.
+
+    The actual indices can either be defined as a time range defined by
+    2 expression, or as a list of expressions.
+    """
+
     expressions: Union[List[ExpressionNode], ExpressionRange]
 
     def __init__(

src/andromede/expression/indexing.py

@@ -68,16 +68,6 @@ class TimeScenarioIndexingVisitor(ExpressionVisitor[IndexingStructure]):
 
     context: IndexingStructureProvider
 
-    def comp_parameter(self, node: ComponentParameterNode) -> IndexingStructure:
-        return self.context.get_component_parameter_structure(
-            node.component_id, node.name
-        )
-
-    def comp_variable(self, node: ComponentVariableNode) -> IndexingStructure:
-        return self.context.get_component_variable_structure(
-            node.component_id, node.name
-        )
-
     def literal(self, node: LiteralNode) -> IndexingStructure:
         return IndexingStructure(False, False)
 
@@ -109,6 +99,16 @@ def parameter(self, node: ParameterNode) -> IndexingStructure:
         scenario = self.context.get_parameter_structure(node.name).scenario == True
         return IndexingStructure(time, scenario)
 
+    def comp_variable(self, node: ComponentVariableNode) -> IndexingStructure:
+        return self.context.get_component_variable_structure(
+            node.component_id, node.name
+        )
+
+    def comp_parameter(self, node: ComponentParameterNode) -> IndexingStructure:
+        return self.context.get_component_parameter_structure(
+            node.component_id, node.name
+        )
+
     def time_operator(self, node: TimeOperatorNode) -> IndexingStructure:
         time_operator_cls = getattr(andromede.expression.time_operator, node.name)
         if time_operator_cls.rolling():
@@ -126,10 +126,14 @@ def scenario_operator(self, node: ScenarioOperatorNode) -> IndexingStructure:
         return IndexingStructure(visit(node.operand, self).time, False)
 
     def port_field(self, node: PortFieldNode) -> IndexingStructure:
-        raise ValueError("Should be instantiated before computing indexing structure.")
+        raise ValueError(
+            "Port fields must be resolved before computing indexing structure."
+        )
 
     def port_field_aggregator(self, node: PortFieldAggregatorNode) -> IndexingStructure:
-        raise ValueError("Should be instantiated before computing indexing structure.")
+        raise ValueError(
+            "Port fields aggregators must be resolved before computing indexing structure."
+        )
 
 
 def compute_indexation(

src/andromede/expression/port_resolver.py

@@ -42,21 +42,21 @@ class PortResolver(CopyVisitor):
     their corresponding expression.
     """
 
-    ports_expressions: Dict[PortFieldKey, List[ExpressionNode]]
     component_id: str
+    ports_expressions: Dict[PortFieldKey, List[ExpressionNode]]
 
     def port_field(self, node: PortFieldNode) -> ExpressionNode:
-        expression = self.ports_expressions[
+        expressions = self.ports_expressions[
             PortFieldKey(
                 self.component_id, PortFieldId(node.port_name, node.field_name)
             )
         ]
-        if len(expression) != 1:
+        if len(expressions) != 1:
             raise ValueError(
                 f"Invalid number of expression for port : {node.port_name}"
             )
         else:
-            return expression[0]
+            return expressions[0]
 
     def port_field_aggregator(self, node: PortFieldAggregatorNode) -> ExpressionNode:
         if node.aggregator != "PortSum":
@@ -80,4 +80,4 @@ def resolve_port(
     component_id: str,
     ports_expressions: Dict[PortFieldKey, List[ExpressionNode]],
 ) -> ExpressionNode:
-    return visit(expression, PortResolver(ports_expressions, component_id))
+    return visit(expression, PortResolver(component_id, ports_expressions))

src/andromede/expression/print.py

@@ -54,12 +54,6 @@ class PrinterVisitor(ExpressionVisitor[str]):
     TODO: remove parenthis where not necessary.
     """
 
-    def comp_parameter(self, node: ComponentParameterNode) -> str:
-        return f"{node.component_id}.{node.name}"
-
-    def comp_variable(self, node: ComponentVariableNode) -> str:
-        return f"{node.component_id}.{node.name}"
-
     def literal(self, node: LiteralNode) -> str:
         return str(node.value)
 
@@ -98,6 +92,12 @@ def variable(self, node: VariableNode) -> str:
     def parameter(self, node: ParameterNode) -> str:
         return node.name
 
+    def comp_variable(self, node: ComponentVariableNode) -> str:
+        return f"{node.component_id}.{node.name}"
+
+    def comp_parameter(self, node: ComponentParameterNode) -> str:
+        return f"{node.component_id}.{node.name}"
+
     # TODO: Add pretty print for node.instances_index
     def time_operator(self, node: TimeOperatorNode) -> str:
         return f"({visit(node.operand, self)}.{str(node.name)}({node.instances_index}))"

src/andromede/expression/visitor.py

@@ -86,31 +86,31 @@ def parameter(self, node: ParameterNode) -> T:
         ...
 
     @abstractmethod
-    def time_operator(self, node: TimeOperatorNode) -> T:
+    def comp_parameter(self, node: ComponentParameterNode) -> T:
         ...
 
     @abstractmethod
-    def time_aggregator(self, node: TimeAggregatorNode) -> T:
+    def comp_variable(self, node: ComponentVariableNode) -> T:
         ...
 
     @abstractmethod
-    def scenario_operator(self, node: ScenarioOperatorNode) -> T:
+    def time_operator(self, node: TimeOperatorNode) -> T:
         ...
 
     @abstractmethod
-    def port_field(self, node: PortFieldNode) -> T:
+    def time_aggregator(self, node: TimeAggregatorNode) -> T:
         ...
 
     @abstractmethod
-    def port_field_aggregator(self, node: PortFieldAggregatorNode) -> T:
+    def scenario_operator(self, node: ScenarioOperatorNode) -> T:
         ...
 
     @abstractmethod
-    def comp_parameter(self, node: ComponentParameterNode) -> T:
+    def port_field(self, node: PortFieldNode) -> T:
         ...
 
     @abstractmethod
-    def comp_variable(self, node: ComponentVariableNode) -> T:
+    def port_field_aggregator(self, node: PortFieldAggregatorNode) -> T:
         ...