mirror of https://github.com/jkjoy/sunpeiwen.git
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{"version":3,"names":["_t","require","_util","BOOLEAN_NUMBER_BINARY_OPERATORS","createTypeAnnotationBasedOnTypeof","numberTypeAnnotation","voidTypeAnnotation","_default","node","isReferenced","binding","scope","getBinding","name","identifier","typeAnnotation","getTypeAnnotationBindingConstantViolations","path","types","functionConstantViolations","constantViolations","getConstantViolationsBefore","testType","getConditionalAnnotation","testConstantViolations","ifStatement","filter","indexOf","push","length","violation","getTypeAnnotation","createUnionType","functions","violations","slice","unshift","resolve","status","_guessExecutionStatusRelativeTo","inferAnnotationFromBinaryExpression","operator","right","get","left","target","isIdentifier","typeofPath","typePath","isUnaryExpression","isLiteral","typeValue","value","getParentConditionalPath","parentPath","isIfStatement","isConditionalExpression","key","isFunction","test","paths","i","isLogicalExpression","isBinaryExpression","type"],"sources":["../../../src/path/inference/inferer-reference.ts"],"sourcesContent":["import type NodePath from \"../index\";\nimport {\n BOOLEAN_NUMBER_BINARY_OPERATORS,\n createTypeAnnotationBasedOnTypeof,\n numberTypeAnnotation,\n voidTypeAnnotation,\n} from \"@babel/types\";\nimport type * as t from \"@babel/types\";\nimport type Binding from \"../../scope/binding\";\n\nimport { createUnionType } from \"./util\";\n\nexport default function (this: NodePath<t.Identifier>, node: t.Identifier) {\n if (!this.isReferenced()) return;\n\n // check if a binding exists of this value and if so then return a union type of all\n // possible types that the binding could be\n const binding = this.scope.getBinding(node.name);\n if (binding) {\n if (binding.identifier.typeAnnotation) {\n return binding.identifier.typeAnnotation;\n } else {\n return getTypeAnnotationBindingConstantViolations(\n binding,\n this,\n node.name,\n );\n }\n }\n\n // built-in values\n if (node.name === \"undefined\") {\n return voidTypeAnnotation();\n } else if (node.name === \"NaN\" || node.name === \"Infinity\") {\n return numberTypeAnnotation();\n } else if (node.name === \"arguments\") {\n // todo\n }\n}\n\nfunction getTypeAnnotationBindingConstantViolations(\n binding: Binding,\n path: NodePath<t.Identifier>,\n name: string,\n) {\n const types = [];\n\n const functionConstantViolations: NodePath[] = [];\n let constantViolations = getConstantViolationsBefore(\n binding,\n path,\n functionConstantViolations,\n );\n\n const testType = getConditionalAnnotation(binding, path, name);\n if (testType) {\n const testConstantViolations = getConstantViolationsBefore(\n binding,\n testType.ifStatement,\n );\n\n // remove constant violations observed before the IfStatement\n constantViolations = constantViolations.filter(\n path => testConstantViolations.indexOf(path) < 0,\n );\n\n // clear current types and add in observed test type\n types.push(testType.typeAnnotation);\n }\n\n if (constantViolations.length) {\n // pick one constant from each scope which will represent the last possible\n // control flow path that it could've taken/been\n /* This code is broken for the following problems:\n * It thinks that assignments can only happen in scopes.\n * What about conditionals, if statements without block,\n * or guarded assignments.\n * It also checks to see if one of the assignments is in the\n * same scope and uses that as the only \"violation\". However,\n * the binding is returned by `getConstantViolationsBefore` so we for\n * sure always going to return that as the only \"violation\".\n let rawConstantViolations = constantViolations.reverse();\n let visitedScopes = [];\n constantViolations = [];\n for (let violation of (rawConstantViolations: Array<NodePath>)) {\n let violationScope = violation.scope;\n if (visitedScopes.indexOf(violationScope) >= 0) continue;\n\n visitedScopes.push(violationScope);\
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