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Type Checking

Type checking in Starlasu validates that operations and expressions in your code are type-safe, preventing runtime errors and improving code quality.

What is Type Checking?​

Type checking verifies:

  • Type Compatibility: Operations use compatible types
  • Type Safety: Prevent invalid type operations
  • Type Inference: Determine types from context
  • Type Constraints: Enforce type-related rules

Type Checking Process​

Static Analysis​

  • Compile-Time Checking: Validate types before execution
  • Type Inference: Automatically determine types where possible
  • Constraint Validation: Check type constraints and bounds

Dynamic Analysis​

  • Runtime Type Checking: Validate types during execution
  • Type Guards: Runtime type validation and conversion
  • Error Handling: Graceful handling of type mismatches

Type System Features​

Basic Types​

  • Primitive Types: Numbers, strings, booleans
  • Composite Types: Arrays, objects, unions
  • Generic Types: Parameterized type definitions

Advanced Features​

  • Type Inference: Automatic type determination
  • Union Types: Support for multiple possible types
  • Intersection Types: Combine multiple type constraints
  • Type Guards: Runtime type validation

Benefits​

  • Error Prevention: Catch type errors early
  • Code Quality: Ensure type safety across codebase
  • Documentation: Types serve as documentation
  • Tool Support: Enable better IDE features

Implementation​

Starlasu provides:

  • Type System: Framework for defining types
  • Type Checker: Engine for validating type rules
  • Type Inference: Automatic type determination
  • Error Reporting: Clear type error messages