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Template Haskell (Grade A)Security-tested data-ai skill for Claude AI. Grade A. Distinguish mkName and newName in Template Haskell. Use mkName to capture existing names and newName for fresh non-colliding names. Use when writi

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Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

Template Haskell is a meta-programming system for the Haskell programming language. It allows developers to write code that generates other code at compile-time. The system provides two main functions for working with names: mkName and newName. The mkName function is used to capture existing names in the current scope. This is useful when writing or reviewing Template Haskell code that needs to refer to existing identifiers. On the other hand, the newName function generates fresh, non-colliding names. This function is essential when creating new identifiers that should not conflict with existing ones. In general, when deciding between mkName and newName, developers should use mkName when they need to capture an existing name and newName when they need to generate a new, unique name. This distinction is crucial for writing correct and safe Template Haskell code. One of the key benefits of Template Haskell is its ability to simplify code generation and meta-programming tasks. By using mkName and newName correctly, developers can create robust and maintainable code that takes advantage of Haskell's strong type system. The use of Template Haskell requires a good understanding of Haskell's type system and meta-programming concepts. While it can be a powerful tool for experienced developers, it may have a steep learning curve for those new to Haskell or meta-programming.

Key features

  • Distinguishes between mkName and newName
  • Provides guidance on using mkName for existing names
  • Provides guidance on using newName for fresh names

Pricing

Model
Free
Category
Skills
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Use cases

Generating Names in Template Haskell

Use Template Haskell (Grade A) to generate names in Template Haskell code, ensuring that names are unique and do not conflict with existing names.

Reviewing Template Haskell Code

Use Template Haskell (Grade A) to review Template Haskell code and ensure that it uses mkName and newName correctly to generate names.

Pros & Cons

Pros

  • Helps prevent naming conflicts
  • Improves code readability
  • Provides clear guidelines for name generation

Cons

  • Limited to Template Haskell context
  • Requires understanding of Haskell and Template Haskell

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Q&A

Are there any limitations I should be aware of when using mkName and newName?

Both functions are only applicable within the Template Haskell meta-programming context and require a solid understanding of Haskell and Template Haskell. They cannot be used outside compile-time code generation.

Asked by Uma Krishnan · Mar 26, 2026

What are the main benefits of using Template Haskell’s name functions?

mkName and newName help prevent naming conflicts and improve code readability by clearly distinguishing between references to existing names and creation of fresh ones. This guidance makes generated code safer and easier to understand.

Asked by Amara Chukwu · Feb 15, 2026

When should I use mkName versus newName in Template Haskell?

Use mkName to capture an existing identifier in the current scope, such as when you need to refer to a known function or variable. Use newName to generate a fresh, unique identifier that won’t collide with any existing names, which is essential for creating new bindings inside generated code.

Asked by Quoc Bui · Feb 12, 2026

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