feat: support for expression

[tonyfettes]

Summary by CodeRabbit

• New Features
  • Enhanced language syntax with support for various types of for loops, including standard, infinite, and simplified loops, to improve loop construct capabilities.

[coderabbitai]

Walkthrough

The update introduces support for for loops in the language's syntax, significantly enhancing its loop construct capabilities. This includes the addition of new grammar rules and node types for for expressions and binders, alongside test cases that demonstrate the functionality of standard, infinite, and simplified for loops. This change broadens the language's syntax, allowing for more complex and varied loop iterations.

Changes

Files	Change Summary
grammar.js, src/.../json	Added support for for loops by introducing for_expression and for_binder rules and types, expanding the language syntax.
test/corpus/for.txt	Added test cases demonstrating the functionality of standard, infinite, and simplified for loops.

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Actionable comments posted: 0

Review Status

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between b034ab9 and 9570a81.

Files selected for processing (4)

• grammar.js (3 hunks)
• src/grammar.json (2 hunks)
• src/node-types.json (3 hunks)
• test/corpus/for.txt (1 hunks)

Additional comments not posted (10)

test/corpus/for.txt (3)

4-7: The standard for loop example is correctly implemented and matches the expected syntax for the language. However, ensure that the loop's body, even if empty, is clearly documented or exemplified to guide users on how to utilize it effectively.

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56-59: The infinite loop example demonstrates a for loop without an explicit loop condition. This is a valuable addition, but it's crucial to include comments or documentation within the test corpus to explain the intended use cases and behavior of such loops for clarity and educational purposes.

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94-99: The simplified for loop example is a great showcase of the language's flexibility. However, it's important to ensure that examples like this are accompanied by comments explaining the behavior, especially the use of continue within the loop, to help users understand its practical applications.

grammar.js (1)

594-611: The implementation of the for_expression and for_binder rules is well-done and aligns with the language's syntax requirements for for loops. However, consider adding comments within the grammar definition to explain the purpose and usage of these new rules, enhancing maintainability and readability for future contributors.

src/node-types.json (4)

656-659: The addition of for_expression to the expression type's children is correctly implemented, ensuring that for loops are recognized as expressions. This change aligns with the PR's objective to enhance loop construct capabilities.

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698-716: The for_binder type is well-defined, with expression and lowercase_identifier as its children. This structure seems appropriate for capturing the binding part of a for loop, where a variable is bound to each element of a collection. Ensure that the usage of for_binder within for_expression and potentially other contexts is consistent and correctly implemented.

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717-739: The for_expression type is correctly structured to include a block_expression for the loop body, a for_binder for the loop variable binding, and a simple_expression likely representing the collection being iterated over. This structure effectively captures the essential components of a for loop. It's important to ensure that the integration of for_expression within the language's syntax allows for all intended for loop variations as described in the PR objectives.

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2482-2485: The addition of the for keyword as a non-named type is a necessary update to support the new for loop syntax. This change ensures that the for keyword is recognized by the parser. It's crucial to verify that this keyword is correctly utilized in the grammar definitions to accurately parse for loops.

src/grammar.json (2)

3659-3675: The for_binder segment is well-defined and follows the expected structure for a loop binder in the language's grammar.

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3676-3787: The for_expression segment accurately represents the structure of a for loop in the language's grammar. Consider adding comments or documentation within the JSON or accompanying files to explain the structure and usage of for loops for future reference and clarity.