String Stack Calc Laravel Package

Product Decisions This Supports

• Feature Development: Enables rapid implementation of string-based arithmetic operations (e.g., parsing and evaluating expressions like "3 + 5 * 2" from user input, logs, or APIs) without reinventing parsing logic. Ideal for:
  • Financial apps (e.g., formula validation, dynamic pricing calculations).
  • Rule engines (e.g., conditional logic in workflows where expressions are stored as strings).
  • Data transformation pipelines (e.g., converting CSV formulas into computed values).
• Roadmap Acceleration: Reduces backend effort for math-heavy features by leveraging a pre-built stack-based calculator (avoids regex/recursive parsing complexity).
• Build vs. Buy: Buy if the team lacks expertise in parser generators (e.g., ANTLR) or needs a lightweight solution. Build only if requiring advanced features (e.g., custom functions, error recovery).
• Use Cases:
  • Admin panels where users input formulas (e.g., "Discount = price * 0.9").
  • Legacy system integration where expressions are stored as strings (e.g., database fields).
  • Prototyping math-heavy APIs before investing in a full parser.

When to Consider This Package

• Adopt if:
  • You need a simple, stack-based calculator for basic arithmetic (+, -, *, /, parentheses) with string input/output.
  • Your team prioritizes speed over customization (e.g., no need for variables, functions, or error recovery).
  • You’re using Symfony 3.4–4.0 (compatibility is limited; check for updates if on newer versions).
  • The package’s proprietary license is acceptable (unclear terms; verify legal risks).
• Look elsewhere if:
  • You require advanced features (e.g., variables, custom functions like sin(), error handling).
  • Your PHP version is <7.1.3 or >7.4 (no recent updates).
  • You need high performance (this is likely not optimized for large-scale use).
  • The lack of stars/activity concerns you (no community support or maintenance).
  • Alternatives like league/math or DIY solutions (e.g., eval() with sanitization) better fit your needs.

How to Pitch It (Stakeholders)

For Executives: "This package lets us quickly add string-based math calculations (e.g., user-defined formulas) to [Product X] without building a custom parser from scratch. It’s a lightweight, Symfony-compatible solution for features like dynamic pricing or rule engines, saving dev time while keeping the codebase clean. The trade-off? Limited to basic arithmetic—ideal for MVP phases or niche use cases where complexity isn’t needed."

For Engineering: "The ardiakov/string-stack-calc bundle provides a stack-based calculator for evaluating arithmetic expressions from strings (e.g., '2 + 3 * (4 - 1)'). It’s a drop-in Symfony bundle with minimal dependencies (PHP 7.1+, Symfony 3.4/4.0).

• Pros: No parser logic to write; handles operator precedence and parentheses.
• Cons: No variables/functions; outdated (last release 2019); proprietary license. Use it for quick prototyping or simple use cases, but evaluate alternatives (e.g., league/math) for production-critical features."