1 | 'use strict';
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2 |
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3 | Object.defineProperty(exports, "__esModule", {
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4 | value: true
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5 | });
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6 | exports.default = extractValueFromBinaryExpression;
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7 | /**
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8 | * Extractor function for a BinaryExpression type value node.
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9 | * A binary expression has a left and right side separated by an operator
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10 | * such as `a + b`.
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11 | *
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12 | * @param - value - AST Value object with type `BinaryExpression`
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13 | * @returns - The extracted value converted to correct type.
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14 | */
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15 | function extractValueFromBinaryExpression(value) {
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16 | // eslint-disable-next-line global-require
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17 | var getValue = require('.').default;
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18 | var operator = value.operator,
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19 | left = value.left,
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20 | right = value.right;
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21 |
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22 | var leftVal = getValue(left);
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23 | var rightVal = getValue(right);
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24 |
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25 | switch (operator) {
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26 | case '==':
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27 | return leftVal == rightVal; // eslint-disable-line
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28 | case '!=':
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29 | return leftVal != rightVal; // eslint-disable-line
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30 | case '===':
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31 | return leftVal === rightVal;
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32 | case '!==':
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33 | return leftVal !== rightVal;
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34 | case '<':
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35 | return leftVal < rightVal;
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36 | case '<=':
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37 | return leftVal <= rightVal;
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38 | case '>':
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39 | return leftVal > rightVal;
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40 | case '>=':
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41 | return leftVal >= rightVal;
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42 | case '<<':
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43 | return leftVal << rightVal; // eslint-disable-line no-bitwise
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44 | case '>>':
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45 | return leftVal >> rightVal; // eslint-disable-line no-bitwise
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46 | case '>>>':
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47 | return leftVal >>> rightVal; // eslint-disable-line no-bitwise
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48 | case '+':
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49 | return leftVal + rightVal;
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50 | case '-':
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51 | return leftVal - rightVal;
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52 | case '*':
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53 | return leftVal * rightVal;
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54 | case '/':
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55 | return leftVal / rightVal;
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56 | case '%':
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57 | return leftVal % rightVal;
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58 | case '|':
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59 | return leftVal | rightVal; // eslint-disable-line no-bitwise
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60 | case '^':
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61 | return leftVal ^ rightVal; // eslint-disable-line no-bitwise
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62 | case '&':
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63 | return leftVal & rightVal; // eslint-disable-line no-bitwise
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64 | case 'in':
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65 | try {
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66 | return leftVal in rightVal;
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67 | } catch (err) {
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68 | return false;
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69 | }
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70 | case 'instanceof':
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71 | if (typeof rightVal !== 'function') {
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72 | return false;
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73 | }
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74 | return leftVal instanceof rightVal;
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75 | default:
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76 | return undefined;
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77 | }
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78 | } |
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