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Handle logical assignment in super property transforms #14164

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merged 6 commits into from Jan 17, 2022
Merged

Handle logical assignment in super property transforms #14164

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ffee2ee
fix: add test cases
magic-akari Jan 17, 2022
50a2449
Fix logical assignment in super property transforms
magic-akari Jan 17, 2022
a2cd315
fix: test cases
magic-akari Jan 17, 2022
f47fb15
Fix logical assignment in super property transforms
magic-akari Jan 17, 2022
bc98816
chore: clean code
magic-akari Jan 17, 2022
b171bba
chore: clean code
magic-akari Jan 17, 2022
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20 changes: 18 additions & 2 deletions packages/babel-traverse/src/path/conversion.ts
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Expand Up @@ -11,6 +11,7 @@ import {
identifier,
isIdentifier,
jsxIdentifier,
logicalExpression,
memberExpression,
metaProperty,
numericLiteral,
Expand Down Expand Up @@ -424,7 +425,7 @@ function standardizeSuperProperty(superProp) {
assignmentPath
.get("right")
.replaceWith(
binaryExpression(
rightExpression(
op,
memberExpression(
superProp.node.object,
Expand All @@ -444,7 +445,7 @@ function standardizeSuperProperty(superProp) {
assignmentPath
.get("right")
.replaceWith(
binaryExpression(
rightExpression(
op,
memberExpression(
superProp.node.object,
Expand Down Expand Up @@ -506,6 +507,21 @@ function standardizeSuperProperty(superProp) {
}

return [superProp];

type LogicalOp = Parameters<typeof logicalExpression>[0];
type BinaryOp = Parameters<typeof binaryExpression>[0];

function rightExpression(
op: LogicalOp | BinaryOp,
left: t.Expression,
right: t.Expression,
) {
if (["||", "&&", "??"].includes(op)) {
return logicalExpression(op as LogicalOp, left, right);
} else {
return binaryExpression(op as BinaryOp, left, right);
}
}
}

function hasSuperClass(thisEnvFn) {
Expand Down
146 changes: 146 additions & 0 deletions packages/babel-traverse/test/arrow-transform.js
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Expand Up @@ -518,6 +518,152 @@ describe("arrow function conversion", () => {
);
});

it("should convert super.prop operator logical assign `??=`", () => {
assertConversion(
`
() => {
super.foo ??= 4;
};
super.foo ??= 4;
() => super.foo ??= 4;
`,
`
var _superprop_setFoo = _value => super.foo = _value,
_superprop_getFoo = () => super.foo;

(function () {
_superprop_setFoo(_superprop_getFoo() ?? 4);
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Logical expressions short-circuit, so this should become something like

_superprop_getFoo() ?? _superprop_setFoo(4);

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Ah, Thanks

});
super.foo ??= 4;
() => super.foo ??= 4;
`,
);
});

it("should convert super.prop operator logical assign `&&=`", () => {
assertConversion(
`
() => {
super.foo &&= true;
};
super.foo &&= true;
() => super.foo &&= true;
`,
`
var _superprop_setFoo = _value => super.foo = _value,
_superprop_getFoo = () => super.foo;

(function () {
_superprop_setFoo(_superprop_getFoo() && true);
});
super.foo &&= true;
() => super.foo &&= true;
`,
);
});

it("should convert super.prop operator logical assign `||=`", () => {
assertConversion(
`
() => {
super.foo ||= true;
};
super.foo ||= true;
() => super.foo ||= true;
`,
`
var _superprop_setFoo = _value => super.foo = _value,
_superprop_getFoo = () => super.foo;

(function () {
_superprop_setFoo(_superprop_getFoo() || true);
});
super.foo ||= true;
() => super.foo ||= true;
`,
);
});

//

it("should convert super[prop] operator logical assign `??=`", () => {
assertConversion(
`
() => {
super[foo] ??= 4;
};
super[foo] ??= 4;
() => super[foo] ??= 4;
`,
`
var _superprop_set = (_prop, _value) => super[_prop] = _value,
_superprop_get = _prop2 => super[_prop2];

(function () {
var _tmp;

_superprop_set(_tmp = foo, _superprop_get(_tmp) ?? 4);
});

super[foo] ??= 4;

() => super[foo] ??= 4;
`,
);
});

it("should convert super[prop] operator logical assign `&&=`", () => {
assertConversion(
`
() => {
super[foo] &&= true;
};
super[foo] &&= true;
() => super[foo] &&= true;
`,
`
var _superprop_set = (_prop, _value) => super[_prop] = _value,
_superprop_get = _prop2 => super[_prop2];

(function () {
var _tmp;

_superprop_set(_tmp = foo, _superprop_get(_tmp) && true);
});

super[foo] &&= true;

() => super[foo] &&= true;
`,
);
});

it("should convert super[prop] operator logical assign `||=`", () => {
assertConversion(
`
() => {
super[foo] ||= true;
};
super[foo] ||= true;
() => super[foo] ||= true;
`,
`
var _superprop_set = (_prop, _value) => super[_prop] = _value,
_superprop_get = _prop2 => super[_prop2];

(function () {
var _tmp;

_superprop_set(_tmp = foo, _superprop_get(_tmp) || true);
});

super[foo] ||= true;

() => super[foo] ||= true;
`,
);
});

it("should convert `++super.prop` prefix update", () => {
assertConversion(
`
Expand Down