Simplified file structure

src/scope/Scope.go

@@ -0,0 +1,30 @@
+package scope
+
+import (
+	"git.akyoto.dev/cli/q/src/cpu"
+)
+
+// Scope represents an independent code block.
+type Scope struct {
+	Variables []*Variable
+	Depth     uint8
+	InLoop    bool
+	cpu.State
+}
+
+// AddVariable adds a new variable to the current scope.
+func (s *Scope) AddVariable(variable *Variable) {
+	s.Variables = append(s.Variables, variable)
+	s.Use(variable.Register)
+}
+
+// VariableByName returns the variable with the given name or `nil` if it doesn't exist.
+func (s *Scope) VariableByName(name string) *Variable {
+	for _, v := range s.Variables {
+		if v.Name == name {
+			return v
+		}
+	}
+
+	return nil
+}