diff options
Diffstat (limited to 'node_modules/@babel/helper-split-export-declaration/lib/index.js')
| -rw-r--r-- | node_modules/@babel/helper-split-export-declaration/lib/index.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/node_modules/@babel/helper-split-export-declaration/lib/index.js b/node_modules/@babel/helper-split-export-declaration/lib/index.js new file mode 100644 index 00000000..8cffb19b --- /dev/null +++ b/node_modules/@babel/helper-split-export-declaration/lib/index.js @@ -0,0 +1,68 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = splitExportDeclaration; + +function t() { + const data = _interopRequireWildcard(require("@babel/types")); + + t = function t() { + return data; + }; + + return data; +} + +function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } } + +function splitExportDeclaration(exportDeclaration) { + if (!exportDeclaration.isExportDeclaration()) { + throw new Error("Only export declarations can be splitted."); + } + + const isDefault = exportDeclaration.isExportDefaultDeclaration(); + const declaration = exportDeclaration.get("declaration"); + const isClassDeclaration = declaration.isClassDeclaration(); + + if (isDefault) { + const standaloneDeclaration = declaration.isFunctionDeclaration() || isClassDeclaration; + const scope = declaration.isScope() ? declaration.scope.parent : declaration.scope; + let id = declaration.node.id; + let needBindingRegistration = false; + + if (!id) { + needBindingRegistration = true; + id = scope.generateUidIdentifier("default"); + + if (standaloneDeclaration || declaration.isFunctionExpression() || declaration.isClassExpression()) { + declaration.node.id = t().cloneNode(id); + } + } + + const updatedDeclaration = standaloneDeclaration ? declaration : t().variableDeclaration("var", [t().variableDeclarator(t().cloneNode(id), declaration.node)]); + const updatedExportDeclaration = t().exportNamedDeclaration(null, [t().exportSpecifier(t().cloneNode(id), t().identifier("default"))]); + exportDeclaration.insertAfter(updatedExportDeclaration); + exportDeclaration.replaceWith(updatedDeclaration); + + if (needBindingRegistration) { + scope.registerBinding(isClassDeclaration ? "let" : "var", exportDeclaration); + } + + return exportDeclaration; + } + + if (exportDeclaration.get("specifiers").length > 0) { + throw new Error("It doesn't make sense to split exported specifiers."); + } + + const bindingIdentifiers = declaration.getOuterBindingIdentifiers(); + const specifiers = Object.keys(bindingIdentifiers).map(name => { + return t().exportSpecifier(t().identifier(name), t().identifier(name)); + }); + const aliasDeclar = t().exportNamedDeclaration(null, specifiers); + exportDeclaration.insertAfter(aliasDeclar); + exportDeclaration.replaceWith(declaration.node); + return exportDeclaration; +}
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