47 lines
1.0 KiB
JavaScript
47 lines
1.0 KiB
JavaScript
import resolve, { toString, traverse } from '../resolve.js';
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import constant from './constant.js';
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const unaryOperator = {
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create({operator, right}) {
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return {
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parseType: 'unaryOperator',
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operator,
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right,
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};
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},
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resolve(fn, node, scope, context){
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const {result: rightNode} = resolve(fn, node.right, scope, context);
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if (rightNode.parseType !== 'number'){
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return {
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result: unaryOperator.create({
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operator: node.operator,
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right: rightNode,
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}),
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context,
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};
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}
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let right = rightNode.value;
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let result;
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switch(node.operator){
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case '-': result = -right; break;
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case '+': result = +right; break;
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}
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return {
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result: constant.create({
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value: result,
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parseType: typeof result,
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}),
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context,
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};
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},
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toString(node){
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return `${node.operator}${toString(node.right)}`;
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},
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traverse(node, fn){
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fn(node);
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traverse(node.right, fn);
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},
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};
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export default unaryOperator;
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