245 lines
9.0 KiB
JavaScript
245 lines
9.0 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
||
|
|
|
||
|
|
var helperPluginUtils = require('@babel/helper-plugin-utils');
|
||
|
|
var core = require('@babel/core');
|
||
|
|
var helperSkipTransparentExpressionWrappers = require('@babel/helper-skip-transparent-expression-wrappers');
|
||
|
|
|
||
|
|
function willPathCastToBoolean(path) {
|
||
|
|
const maybeWrapped = findOutermostTransparentParent(path);
|
||
|
|
const {
|
||
|
|
node,
|
||
|
|
parentPath
|
||
|
|
} = maybeWrapped;
|
||
|
|
if (parentPath.isLogicalExpression()) {
|
||
|
|
const {
|
||
|
|
operator,
|
||
|
|
right
|
||
|
|
} = parentPath.node;
|
||
|
|
if (operator === "&&" || operator === "||" || operator === "??" && node === right) {
|
||
|
|
return willPathCastToBoolean(parentPath);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (parentPath.isSequenceExpression()) {
|
||
|
|
const {
|
||
|
|
expressions
|
||
|
|
} = parentPath.node;
|
||
|
|
if (expressions[expressions.length - 1] === node) {
|
||
|
|
return willPathCastToBoolean(parentPath);
|
||
|
|
} else {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return parentPath.isConditional({
|
||
|
|
test: node
|
||
|
|
}) || parentPath.isUnaryExpression({
|
||
|
|
operator: "!"
|
||
|
|
}) || parentPath.isLoop({
|
||
|
|
test: node
|
||
|
|
});
|
||
|
|
}
|
||
|
|
function findOutermostTransparentParent(path) {
|
||
|
|
let maybeWrapped = path;
|
||
|
|
path.findParent(p => {
|
||
|
|
if (!helperSkipTransparentExpressionWrappers.isTransparentExprWrapper(p.node)) return true;
|
||
|
|
maybeWrapped = p;
|
||
|
|
});
|
||
|
|
return maybeWrapped;
|
||
|
|
}
|
||
|
|
|
||
|
|
const last = arr => arr[arr.length - 1];
|
||
|
|
function isSimpleMemberExpression(expression) {
|
||
|
|
expression = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(expression);
|
||
|
|
return core.types.isIdentifier(expression) || core.types.isSuper(expression) || core.types.isMemberExpression(expression) && !expression.computed && isSimpleMemberExpression(expression.object);
|
||
|
|
}
|
||
|
|
function needsMemoize(path) {
|
||
|
|
let optionalPath = path;
|
||
|
|
const {
|
||
|
|
scope
|
||
|
|
} = path;
|
||
|
|
while (optionalPath.isOptionalMemberExpression() || optionalPath.isOptionalCallExpression()) {
|
||
|
|
const {
|
||
|
|
node
|
||
|
|
} = optionalPath;
|
||
|
|
const childPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.isOptionalMemberExpression() ? optionalPath.get("object") : optionalPath.get("callee"));
|
||
|
|
if (node.optional) {
|
||
|
|
return !scope.isStatic(childPath.node);
|
||
|
|
}
|
||
|
|
optionalPath = childPath;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
const NULLISH_CHECK = core.template.expression(`%%check%% === null || %%ref%% === void 0`);
|
||
|
|
const NULLISH_CHECK_NO_DDA = core.template.expression(`%%check%% == null`);
|
||
|
|
const NULLISH_CHECK_NEG = core.template.expression(`%%check%% !== null && %%ref%% !== void 0`);
|
||
|
|
const NULLISH_CHECK_NO_DDA_NEG = core.template.expression(`%%check%% != null`);
|
||
|
|
function transformOptionalChain(path, {
|
||
|
|
pureGetters,
|
||
|
|
noDocumentAll
|
||
|
|
}, replacementPath, ifNullish, wrapLast) {
|
||
|
|
const {
|
||
|
|
scope
|
||
|
|
} = path;
|
||
|
|
if (scope.path.isPattern() && needsMemoize(path)) {
|
||
|
|
replacementPath.replaceWith(core.template.expression.ast`(() => ${replacementPath.node})()`);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
const optionals = [];
|
||
|
|
let optionalPath = path;
|
||
|
|
while (optionalPath.isOptionalMemberExpression() || optionalPath.isOptionalCallExpression()) {
|
||
|
|
const {
|
||
|
|
node
|
||
|
|
} = optionalPath;
|
||
|
|
if (node.optional) {
|
||
|
|
optionals.push(node);
|
||
|
|
}
|
||
|
|
if (optionalPath.isOptionalMemberExpression()) {
|
||
|
|
optionalPath.node.type = "MemberExpression";
|
||
|
|
optionalPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.get("object"));
|
||
|
|
} else if (optionalPath.isOptionalCallExpression()) {
|
||
|
|
optionalPath.node.type = "CallExpression";
|
||
|
|
optionalPath = helperSkipTransparentExpressionWrappers.skipTransparentExprWrappers(optionalPath.get("callee"));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (optionals.length === 0) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
const checks = [];
|
||
|
|
let tmpVar;
|
||
|
|
for (let i = optionals.length - 1; i >= 0; i--) {
|
||
|
|
const node = optionals[i];
|
||
|
|
const isCall = core.types.isCallExpression(node);
|
||
|
|
const chainWithTypes = isCall ? node.callee : node.object;
|
||
|
|
const chain = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(chainWithTypes);
|
||
|
|
let ref;
|
||
|
|
let check;
|
||
|
|
if (isCall && core.types.isIdentifier(chain, {
|
||
|
|
name: "eval"
|
||
|
|
})) {
|
||
|
|
check = ref = chain;
|
||
|
|
node.callee = core.types.sequenceExpression([core.types.numericLiteral(0), ref]);
|
||
|
|
} else if (pureGetters && isCall && isSimpleMemberExpression(chain)) {
|
||
|
|
check = ref = node.callee;
|
||
|
|
} else if (scope.isStatic(chain)) {
|
||
|
|
check = ref = chainWithTypes;
|
||
|
|
} else {
|
||
|
|
if (!tmpVar || isCall) {
|
||
|
|
tmpVar = scope.generateUidIdentifierBasedOnNode(chain);
|
||
|
|
scope.push({
|
||
|
|
id: core.types.cloneNode(tmpVar)
|
||
|
|
});
|
||
|
|
}
|
||
|
|
ref = tmpVar;
|
||
|
|
check = core.types.assignmentExpression("=", core.types.cloneNode(tmpVar), chainWithTypes);
|
||
|
|
if (isCall) {
|
||
|
|
node.callee = ref;
|
||
|
|
} else {
|
||
|
|
node.object = ref;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (isCall && core.types.isMemberExpression(chain)) {
|
||
|
|
if (pureGetters && isSimpleMemberExpression(chain)) {
|
||
|
|
node.callee = chainWithTypes;
|
||
|
|
} else {
|
||
|
|
const {
|
||
|
|
object
|
||
|
|
} = chain;
|
||
|
|
let context;
|
||
|
|
if (core.types.isSuper(object)) {
|
||
|
|
context = core.types.thisExpression();
|
||
|
|
} else {
|
||
|
|
const memoized = scope.maybeGenerateMemoised(object);
|
||
|
|
if (memoized) {
|
||
|
|
context = memoized;
|
||
|
|
chain.object = core.types.assignmentExpression("=", memoized, object);
|
||
|
|
} else {
|
||
|
|
context = object;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
node.arguments.unshift(core.types.cloneNode(context));
|
||
|
|
node.callee = core.types.memberExpression(node.callee, core.types.identifier("call"));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
const data = {
|
||
|
|
check: core.types.cloneNode(check),
|
||
|
|
ref: core.types.cloneNode(ref)
|
||
|
|
};
|
||
|
|
Object.defineProperty(data, "ref", {
|
||
|
|
enumerable: false
|
||
|
|
});
|
||
|
|
checks.push(data);
|
||
|
|
}
|
||
|
|
let result = replacementPath.node;
|
||
|
|
if (wrapLast) result = wrapLast(result);
|
||
|
|
const ifNullishBoolean = core.types.isBooleanLiteral(ifNullish);
|
||
|
|
const ifNullishFalse = ifNullishBoolean && ifNullish.value === false;
|
||
|
|
const ifNullishVoid = !ifNullishBoolean && core.types.isUnaryExpression(ifNullish, {
|
||
|
|
operator: "void"
|
||
|
|
});
|
||
|
|
const isEvaluationValueIgnored = core.types.isExpressionStatement(replacementPath.parent) && !replacementPath.isCompletionRecord() || core.types.isSequenceExpression(replacementPath.parent) && last(replacementPath.parent.expressions) !== replacementPath.node;
|
||
|
|
const tpl = ifNullishFalse ? noDocumentAll ? NULLISH_CHECK_NO_DDA_NEG : NULLISH_CHECK_NEG : noDocumentAll ? NULLISH_CHECK_NO_DDA : NULLISH_CHECK;
|
||
|
|
const logicalOp = ifNullishFalse ? "&&" : "||";
|
||
|
|
const check = checks.map(tpl).reduce((expr, check) => core.types.logicalExpression(logicalOp, expr, check));
|
||
|
|
replacementPath.replaceWith(ifNullishBoolean || ifNullishVoid && isEvaluationValueIgnored ? core.types.logicalExpression(logicalOp, check, result) : core.types.conditionalExpression(check, ifNullish, result));
|
||
|
|
}
|
||
|
|
function transform(path, assumptions) {
|
||
|
|
const {
|
||
|
|
scope
|
||
|
|
} = path;
|
||
|
|
const maybeWrapped = findOutermostTransparentParent(path);
|
||
|
|
const {
|
||
|
|
parentPath
|
||
|
|
} = maybeWrapped;
|
||
|
|
if (parentPath.isUnaryExpression({
|
||
|
|
operator: "delete"
|
||
|
|
})) {
|
||
|
|
transformOptionalChain(path, assumptions, parentPath, core.types.booleanLiteral(true));
|
||
|
|
} else {
|
||
|
|
let wrapLast;
|
||
|
|
if (parentPath.isCallExpression({
|
||
|
|
callee: maybeWrapped.node
|
||
|
|
}) && path.isOptionalMemberExpression()) {
|
||
|
|
wrapLast = replacement => {
|
||
|
|
var _baseRef;
|
||
|
|
const object = helperSkipTransparentExpressionWrappers.skipTransparentExprWrapperNodes(replacement.object);
|
||
|
|
let baseRef;
|
||
|
|
if (!assumptions.pureGetters || !isSimpleMemberExpression(object)) {
|
||
|
|
baseRef = scope.maybeGenerateMemoised(object);
|
||
|
|
if (baseRef) {
|
||
|
|
replacement.object = core.types.assignmentExpression("=", baseRef, object);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return core.types.callExpression(core.types.memberExpression(replacement, core.types.identifier("bind")), [core.types.cloneNode((_baseRef = baseRef) != null ? _baseRef : object)]);
|
||
|
|
};
|
||
|
|
}
|
||
|
|
transformOptionalChain(path, assumptions, path, willPathCastToBoolean(maybeWrapped) ? core.types.booleanLiteral(false) : scope.buildUndefinedNode(), wrapLast);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var index = helperPluginUtils.declare((api, options) => {
|
||
|
|
var _api$assumption, _api$assumption2;
|
||
|
|
api.assertVersion("^7.0.0-0 || >8.0.0-alpha <8.0.0-beta");
|
||
|
|
const {
|
||
|
|
loose = false
|
||
|
|
} = options;
|
||
|
|
const noDocumentAll = (_api$assumption = api.assumption("noDocumentAll")) != null ? _api$assumption : loose;
|
||
|
|
const pureGetters = (_api$assumption2 = api.assumption("pureGetters")) != null ? _api$assumption2 : loose;
|
||
|
|
return {
|
||
|
|
name: "transform-optional-chaining",
|
||
|
|
inherits: api.version[0] === "8" ? undefined : require("@babel/plugin-syntax-optional-chaining").default,
|
||
|
|
visitor: {
|
||
|
|
"OptionalCallExpression|OptionalMemberExpression"(path) {
|
||
|
|
transform(path, {
|
||
|
|
noDocumentAll,
|
||
|
|
pureGetters
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
});
|
||
|
|
|
||
|
|
exports.default = index;
|
||
|
|
exports.transform = transform;
|
||
|
|
exports.transformOptionalChain = transformOptionalChain;
|
||
|
|
//# sourceMappingURL=index.js.map
|