diff options
Diffstat (limited to 'node_modules/@babel/generator/lib/node/parentheses.js')
| -rw-r--r-- | node_modules/@babel/generator/lib/node/parentheses.js | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/node_modules/@babel/generator/lib/node/parentheses.js b/node_modules/@babel/generator/lib/node/parentheses.js new file mode 100644 index 00000000..88404718 --- /dev/null +++ b/node_modules/@babel/generator/lib/node/parentheses.js @@ -0,0 +1,238 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.FunctionTypeAnnotation = exports.NullableTypeAnnotation = NullableTypeAnnotation; +exports.UpdateExpression = UpdateExpression; +exports.ObjectExpression = ObjectExpression; +exports.DoExpression = DoExpression; +exports.Binary = Binary; +exports.IntersectionTypeAnnotation = exports.UnionTypeAnnotation = UnionTypeAnnotation; +exports.TSAsExpression = TSAsExpression; +exports.TSTypeAssertion = TSTypeAssertion; +exports.BinaryExpression = BinaryExpression; +exports.SequenceExpression = SequenceExpression; +exports.AwaitExpression = exports.YieldExpression = YieldExpression; +exports.ClassExpression = ClassExpression; +exports.UnaryLike = UnaryLike; +exports.FunctionExpression = FunctionExpression; +exports.ArrowFunctionExpression = ArrowFunctionExpression; +exports.ConditionalExpression = ConditionalExpression; +exports.AssignmentExpression = AssignmentExpression; +exports.NewExpression = NewExpression; + +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; } } + +const PRECEDENCE = { + "||": 0, + "&&": 1, + "|": 2, + "^": 3, + "&": 4, + "==": 5, + "===": 5, + "!=": 5, + "!==": 5, + "<": 6, + ">": 6, + "<=": 6, + ">=": 6, + in: 6, + instanceof: 6, + ">>": 7, + "<<": 7, + ">>>": 7, + "+": 8, + "-": 8, + "*": 9, + "/": 9, + "%": 9, + "**": 10 +}; + +const isClassExtendsClause = (node, parent) => (t().isClassDeclaration(parent) || t().isClassExpression(parent)) && parent.superClass === node; + +function NullableTypeAnnotation(node, parent) { + return t().isArrayTypeAnnotation(parent); +} + +function UpdateExpression(node, parent) { + return t().isMemberExpression(parent, { + object: node + }) || t().isCallExpression(parent, { + callee: node + }) || t().isNewExpression(parent, { + callee: node + }) || isClassExtendsClause(node, parent); +} + +function ObjectExpression(node, parent, printStack) { + return isFirstInStatement(printStack, { + considerArrow: true + }); +} + +function DoExpression(node, parent, printStack) { + return isFirstInStatement(printStack); +} + +function Binary(node, parent) { + if (node.operator === "**" && t().isBinaryExpression(parent, { + operator: "**" + })) { + return parent.left === node; + } + + if (isClassExtendsClause(node, parent)) { + return true; + } + + if ((t().isCallExpression(parent) || t().isNewExpression(parent)) && parent.callee === node || t().isUnaryLike(parent) || t().isMemberExpression(parent) && parent.object === node || t().isAwaitExpression(parent)) { + return true; + } + + if (t().isBinary(parent)) { + const parentOp = parent.operator; + const parentPos = PRECEDENCE[parentOp]; + const nodeOp = node.operator; + const nodePos = PRECEDENCE[nodeOp]; + + if (parentPos === nodePos && parent.right === node && !t().isLogicalExpression(parent) || parentPos > nodePos) { + return true; + } + } + + return false; +} + +function UnionTypeAnnotation(node, parent) { + return t().isArrayTypeAnnotation(parent) || t().isNullableTypeAnnotation(parent) || t().isIntersectionTypeAnnotation(parent) || t().isUnionTypeAnnotation(parent); +} + +function TSAsExpression() { + return true; +} + +function TSTypeAssertion() { + return true; +} + +function BinaryExpression(node, parent) { + return node.operator === "in" && (t().isVariableDeclarator(parent) || t().isFor(parent)); +} + +function SequenceExpression(node, parent) { + if (t().isForStatement(parent) || t().isThrowStatement(parent) || t().isReturnStatement(parent) || t().isIfStatement(parent) && parent.test === node || t().isWhileStatement(parent) && parent.test === node || t().isForInStatement(parent) && parent.right === node || t().isSwitchStatement(parent) && parent.discriminant === node || t().isExpressionStatement(parent) && parent.expression === node) { + return false; + } + + return true; +} + +function YieldExpression(node, parent) { + return t().isBinary(parent) || t().isUnaryLike(parent) || t().isCallExpression(parent) || t().isMemberExpression(parent) || t().isNewExpression(parent) || t().isConditionalExpression(parent) && node === parent.test || isClassExtendsClause(node, parent); +} + +function ClassExpression(node, parent, printStack) { + return isFirstInStatement(printStack, { + considerDefaultExports: true + }); +} + +function UnaryLike(node, parent) { + return t().isMemberExpression(parent, { + object: node + }) || t().isCallExpression(parent, { + callee: node + }) || t().isNewExpression(parent, { + callee: node + }) || t().isBinaryExpression(parent, { + operator: "**", + left: node + }) || isClassExtendsClause(node, parent); +} + +function FunctionExpression(node, parent, printStack) { + return isFirstInStatement(printStack, { + considerDefaultExports: true + }); +} + +function ArrowFunctionExpression(node, parent) { + return t().isExportDeclaration(parent) || ConditionalExpression(node, parent); +} + +function ConditionalExpression(node, parent) { + if (t().isUnaryLike(parent) || t().isBinary(parent) || t().isConditionalExpression(parent, { + test: node + }) || t().isAwaitExpression(parent) || t().isTaggedTemplateExpression(parent) || t().isTSTypeAssertion(parent) || t().isTSAsExpression(parent)) { + return true; + } + + return UnaryLike(node, parent); +} + +function AssignmentExpression(node) { + if (t().isObjectPattern(node.left)) { + return true; + } else { + return ConditionalExpression(...arguments); + } +} + +function NewExpression(node, parent) { + return isClassExtendsClause(node, parent); +} + +function isFirstInStatement(printStack, { + considerArrow = false, + considerDefaultExports = false +} = {}) { + let i = printStack.length - 1; + let node = printStack[i]; + i--; + let parent = printStack[i]; + + while (i > 0) { + if (t().isExpressionStatement(parent, { + expression: node + }) || t().isTaggedTemplateExpression(parent) || considerDefaultExports && t().isExportDefaultDeclaration(parent, { + declaration: node + }) || considerArrow && t().isArrowFunctionExpression(parent, { + body: node + })) { + return true; + } + + if (t().isCallExpression(parent, { + callee: node + }) || t().isSequenceExpression(parent) && parent.expressions[0] === node || t().isMemberExpression(parent, { + object: node + }) || t().isConditional(parent, { + test: node + }) || t().isBinary(parent, { + left: node + }) || t().isAssignmentExpression(parent, { + left: node + })) { + node = parent; + i--; + parent = printStack[i]; + } else { + return false; + } + } + + return false; +}
\ No newline at end of file |