Add/bleu

[shenxiangzhuang]

Summary by CodeRabbit

• New Features

  • Introduced a new functionality for computing BLEU scores, useful for evaluating machine translation accuracy.
  • Added benchmarking capabilities to test and compare BLEU score computations.

• Bug Fixes

  • Improved n-gram counting logic to prevent underflow errors.

• Documentation

  • Enhanced in-code documentation to clarify the changes in main functionality and n-gram processing.

• Tests

  • Added tests to ensure the accuracy of n-gram counting and BLEU score computations.

[coderabbitai]

Walkthrough

The recent updates bring enhancements to BLEU score computation across various files, focusing on testing and refining the calculation process. These changes aim to ensure accuracy and consistency in BLEU score evaluation while also improving n-gram handling and demonstrating nested looping in the main function.

Changes

File(s)	Change Summary
benchmark/test_benchmark_bleu.py	Introduces a test script for BLEU score computation, comparing Python and Rust implementations.
src/lib.rs src/bleu.rs	Added a new module bleu in lib.rs with a compute_bleu function for BLEU score calculation.
src/main.rs	Updated to iterate over a nested loop and print values.
src/ngram.rs	Updated get_ngram_counter function to prevent underflow and added debug prints. Includes a new test function test_get_ngram_short.

Poem

🐇✨
Code branches out like roots entwined,
BLEU scores tested, n-grams refined.
Rust and Python in harmony align,
Nested loops in a dance, a coder's design.
Hop, skip, a commit—a tale defined!

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Recent Review Details

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 3d17946 and 0a38040.

Files selected for processing (2)

• benchmark/test_benchmark_bleu.py (1 hunks)
• src/lib.rs (2 hunks)

Files skipped from review as they are similar to previous changes (2)

• benchmark/test_benchmark_bleu.py
• src/lib.rs

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