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docs(transformer): add documentation for exponentiation-operator plugin (#5084)

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follow-up #4881
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Dunqing 2024-08-22 20:45:41 +00:00
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crates/oxc_transformer/src/es2016/exponentiation_operator.rs
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//! ES2016: Exponentiation Operator
//!
//! This plugin transforms the exponentiation operator (`**`) to `Math.pow`.
//!
//! > This plugin is included in `preset-env`, in ES2016
//!
//! ## Example
//!
//! Input:
//! ```js
//! let x = 10 ** 2;
//!
//! x **= 3;
//! ```
//!
//! Output:
//! ```js
//! let x = Math.pow(10, 2);
//!
//! x = Math.pow(x, 3);
//! ```
//!
//! ## Implementation
//!
//! Implementation based on [@babel/plugin-transform-exponentiation-operator](https://babel.dev/docs/babel-plugin-transform-exponentiation-operator).
//!
//! ## References:
//!
//! * Babel plugin implementation: <https://github.com/babel/babel/blob/main/packages/babel-plugin-transform-exponentiation-operator>
//! * Exponentiation operator TC39 proposal: <https://github.com/tc39/proposal-exponentiation-operator>
//! * Exponentiation operator specification: <https://tc39.es/ecma262/#sec-exp-operator>
use std::cell::Cell;
use oxc_allocator::{CloneIn, Vec};