vue hello world项目
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = wrapFunction;
var _helperFunctionName = require("@babel/helper-function-name");
var _template = require("@babel/template");
var _t = require("@babel/types");
const {
blockStatement,
callExpression,
functionExpression,
isAssignmentPattern,
isRestElement,
returnStatement
} = _t;
const buildAnonymousExpressionWrapper = _template.default.expression(`
(function () {
var REF = FUNCTION;
return function NAME(PARAMS) {
return REF.apply(this, arguments);
};
})()
`);
const buildNamedExpressionWrapper = _template.default.expression(`
(function () {
var REF = FUNCTION;
function NAME(PARAMS) {
return REF.apply(this, arguments);
}
return NAME;
})()
`);
const buildDeclarationWrapper = (0, _template.default)(`
function NAME(PARAMS) { return REF.apply(this, arguments); }
function REF() {
REF = FUNCTION;
return REF.apply(this, arguments);
}
`);
function classOrObjectMethod(path, callId) {
const node = path.node;
const body = node.body;
const container = functionExpression(null, [], blockStatement(body.body), true);
body.body = [returnStatement(callExpression(callExpression(callId, [container]), []))];
node.async = false;
node.generator = false;
path.get("body.body.0.argument.callee.arguments.0").unwrapFunctionEnvironment();
}
function plainFunction(path, callId, noNewArrows, ignoreFunctionLength) {
const node = path.node;
const isDeclaration = path.isFunctionDeclaration();
const functionId = node.id;
const wrapper = isDeclaration ? buildDeclarationWrapper : functionId ? buildNamedExpressionWrapper : buildAnonymousExpressionWrapper;
if (path.isArrowFunctionExpression()) {
path.arrowFunctionToExpression({
noNewArrows
});
}
node.id = null;
if (isDeclaration) {
node.type = "FunctionExpression";
}
const built = callExpression(callId, [node]);
const params = [];
for (const param of node.params) {
if (isAssignmentPattern(param) || isRestElement(param)) {
break;
}
params.push(path.scope.generateUidIdentifier("x"));
}
const container = wrapper({
NAME: functionId || null,
REF: path.scope.generateUidIdentifier(functionId ? functionId.name : "ref"),
FUNCTION: built,
PARAMS: params
});
if (isDeclaration) {
path.replaceWith(container[0]);
path.insertAfter(container[1]);
} else {
const retFunction = container.callee.body.body[1].argument;
if (!functionId) {
(0, _helperFunctionName.default)({
node: retFunction,
parent: path.parent,
scope: path.scope
});
}
if (!retFunction || retFunction.id || !ignoreFunctionLength && params.length) {
path.replaceWith(container);
} else {
path.replaceWith(built);
}
}
}
function wrapFunction(path, callId, noNewArrows = true, ignoreFunctionLength = false) {
if (path.isMethod()) {
classOrObjectMethod(path, callId);
} else {
plainFunction(path, callId, noNewArrows, ignoreFunctionLength);
}
}