Added scope package

src/build/core/useVariable.go

@@ -0,0 +1,36 @@
+package core
+
+import (
+	"git.akyoto.dev/cli/q/src/build/config"
+	"git.akyoto.dev/cli/q/src/build/scope"
+)
+
+func (f *Function) useVariable(variable *scope.Variable) {
+	for i, scope := range f.Scopes {
+		if scope.InLoop && variable.Scope != scope {
+			continue
+		}
+
+		local := scope.Variables[variable.Name]
+
+		if local == nil {
+			continue
+		}
+
+		local.Alive--
+
+		if local.Alive < 0 {
+			panic("incorrect number of variable use calls")
+		}
+
+		if local.Alive == 0 {
+			if config.Comments {
+				f.Comment("%s (%s) died in scope %d", local.Name, local.Register, i)
+			}
+
+			scope.Free(local.Register)
+		} else if config.Comments {
+			f.Comment("%s (%s) used in scope %d", local.Name, local.Register, i)
+		}
+	}
+}