IsValid

Overview

Checks if a PrismaView instance is valid. This method is essential for ensuring that a view has not been destroyed before attempting to perform operations on it, preventing crashes and undefined behavior.

Safety Check

Always use IsValid before performing operations on a PrismaView that might have been destroyed or invalidated, especially in asynchronous or event-driven code.

Syntax

bool IsValid(PrismaView view);

Parameters

view (required)

• Type: PrismaView
• Description: The PrismaView to check for validity

Return Value

• Type: bool
• Returns: true if the PrismaView is valid (e.g., it has not been destroyed); otherwise, false

Usage Examples

Basic Validity Check

// Simple validity check before operation
if (PrismaUI->IsValid(view)) {
    PrismaUI->Invoke(view, "updateUI()");
    logger::info("View is valid - operation performed");
} else {
    logger::warn("View is invalid - operation skipped");
}

Best Practices

Defensive Programming

Use IsValid checks as a defensive programming practice, especially in complex applications where view lifecycle management might be distributed across multiple systems.

• Pre-Operation Checks: Always validate views before performing operations
• Error Handling: Provide appropriate error handling for invalid views
• Lifecycle Tracking: Use validity checks to track view lifecycle states
• Debugging Aid: Use validity checks to identify view management issues