scratch-vm/src/engine/thread.js

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/**
* A thread is a running stack context and all the metadata needed.
* @param {?string} firstBlock First block to execute in the thread.
* @constructor
*/
function Thread (firstBlock) {
/**
* Next block that the thread will execute.
* @type {string}
*/
this.nextBlock = firstBlock;
/**
* Stack for the thread. When the sequencer enters a control structure,
* the block is pushed onto the stack so we know where to exit.
* @type {Array.<string>}
*/
this.stack = [];
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}
module.exports = Thread;