walt-compiler
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Alternative syntax for WebAssembly text format
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<a href="../../index.html">All files</a> / <a href="index.html">src/generator</a> loop.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">// @flow
import mapSyntax from './map-syntax';
import mergeBlock from './merge-block';
import opcode from '../emitter/opcode';
import type { GeneratorType } from './flow/types';
const generateLoop: GeneratorType = (node, parent) => {
const block = [];
const mapper = mapSyntax(parent);
// First param in a for loop is assignment expression or Noop if it's a while loop
const [initializer, condition, ...body] = node.params;
block.push.apply(block, [initializer].map(mapper).reduce(mergeBlock, []));
block.push({ kind: opcode.Block, params: [0x40] });
block.push({ kind: opcode.Loop, params: [0x40] });
block.push.apply(block, [condition].map(mapper).reduce(mergeBlock, []));
block.push({ kind: opcode.i32Eqz, params: [] });
block.push({ kind: opcode.BrIf, params: [1] });
block.push.apply(block, body.map(mapper).reduce(mergeBlock, []));
block.push({ kind: opcode.Br, params: [0] });
block.push({ kind: opcode.End, params: [] });
block.push({ kind: opcode.End, params: [] });
return block;
};
export default generateLoop;
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