(test: t.Expression, value: boolean)
| 24 | } |
| 25 | |
| 26 | function evaluate(test: t.Expression, value: boolean): any { |
| 27 | const res = { |
| 28 | replace: (replacement: t.Expression) => ({ |
| 29 | replacement, |
| 30 | value: null, |
| 31 | unrelated: false, |
| 32 | }), |
| 33 | value: (value: boolean) => ({ |
| 34 | replacement: null, |
| 35 | value, |
| 36 | unrelated: false, |
| 37 | }), |
| 38 | unrelated: () => ({ replacement: test, value: null, unrelated: true }), |
| 39 | }; |
| 40 | |
| 41 | if (t.isIdentifier(test, { name }) || t.matchesPattern(test, name)) { |
| 42 | return res.value(value); |
| 43 | } |
| 44 | |
| 45 | if (t.isUnaryExpression(test, { operator: "!" })) { |
| 46 | const arg = evaluate(test.argument, value); |
| 47 | return arg.unrelated |
| 48 | ? res.unrelated() |
| 49 | : arg.replacement |
| 50 | ? res.replace(t.unaryExpression("!", arg.replacement)) |
| 51 | : res.value(!arg.value); |
| 52 | } |
| 53 | |
| 54 | if (t.isLogicalExpression(test, { operator: "||" })) { |
| 55 | const left = evaluate(test.left, value); |
| 56 | const right = evaluate(test.right, value); |
| 57 | |
| 58 | if (left.value === true || right.value === true) return res.value(true); |
| 59 | if (left.value === false && right.value === false) { |
| 60 | return res.value(false); |
| 61 | } |
| 62 | if (left.value === false) return res.replace(right.replacement); |
| 63 | if (right.value === false) return res.replace(left.replacement); |
| 64 | if (left.unrelated && right.unrelated) return res.unrelated(); |
| 65 | return res.replace( |
| 66 | t.logicalExpression("||", left.replacement, right.replacement) |
| 67 | ); |
| 68 | } |
| 69 | |
| 70 | if (t.isLogicalExpression(test, { operator: "&&" })) { |
| 71 | const left = evaluate(test.left, value); |
| 72 | const right = evaluate(test.right, value); |
| 73 | |
| 74 | if (left.value === true && right.value === true) return res.value(true); |
| 75 | if (left.value === false || right.value === false) { |
| 76 | return res.value(false); |
| 77 | } |
| 78 | if (left.value === true) return res.replace(right.replacement); |
| 79 | if (right.value === true) return res.replace(left.replacement); |
| 80 | if (left.unrelated && right.unrelated) return res.unrelated(); |
| 81 | return res.replace( |
| 82 | t.logicalExpression("&&", left.replacement, right.replacement) |
| 83 | ); |
no test coverage detected