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Check exported bindings are defined (#9589)

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* Check exported bindings are defined

* Add tests

* Update flow whitelist

* Add tests for builtins
This commit is contained in:
Daniel Tschinder
2019-02-26 13:28:10 -08:00
committed by GitHub
parent e883ff295d
commit 43eed1ac92
81 changed files with 1594 additions and 315 deletions
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18
packages/babel-parser/src/parser/statement.js
View File

@@ -49,6 +49,14 @@ export default class StatementParser extends ExpressionParser {
this.parseBlockBody(program, true, true, tt.eof);
if (this.inModule && this.scope.undefinedExports.size > 0) {
for (const [name] of Array.from(this.scope.undefinedExports)) {
const pos = this.scope.undefinedExports.get(name);
// $FlowIssue
this.raise(pos, `Export '${name}' is not defined`);
}
}
file.program = this.finishNode(program, "Program");
file.comments = this.state.comments;
@@ -1631,7 +1639,7 @@ export default class StatementParser extends ExpressionParser {
}
if (isFromRequired || hasSpecifiers || hasDeclaration) {
this.checkExport(node, true);
this.checkExport(node, true, false, !!node.source);
return this.finishNode(node, "ExportNamedDeclaration");
}
@@ -1845,8 +1853,9 @@ export default class StatementParser extends ExpressionParser {
checkExport(
node: N.ExportNamedDeclaration,
checkNames: ?boolean,
checkNames?: boolean,
isDefault?: boolean,
isFrom?: boolean,
): void {
if (checkNames) {
// Check for duplicate exports
@@ -1857,6 +1866,11 @@ export default class StatementParser extends ExpressionParser {
// Named exports
for (const specifier of node.specifiers) {
this.checkDuplicateExports(specifier, specifier.exported.name);
// check if export is defined
// $FlowIgnore
if (!isFrom && specifier.local) {
this.scope.checkLocalExport(specifier.local);
}
}
} else if (node.declaration) {
// Exported declarations

1
packages/babel-parser/src/types.js
View File

@@ -831,6 +831,7 @@ export type ExportNamedDeclaration = NodeBase & {
export type ExportSpecifier = NodeBase & {
type: "ExportSpecifier",
exported: Identifier,
local: Identifier,
};
export type ExportDefaultSpecifier = NodeBase & {

19
packages/babel-parser/src/util/scope.js
View File

@@ -16,6 +16,7 @@ import {
type BindingTypes,
SCOPE_CLASS,
} from "./scopeflags";
import * as N from "../types";
// Start an AST node, attaching a start offset.
class Scope {
@@ -40,6 +41,7 @@ export default class ScopeHandler {
scopeStack: Array<Scope> = [];
raise: raiseFunction;
inModule: boolean;
undefinedExports: Map<string, number> = new Map();
constructor(raise: raiseFunction, inModule: boolean) {
this.raise = raise;
@@ -95,6 +97,9 @@ export default class ScopeHandler {
scope.functions.indexOf(name) > -1 ||
scope.var.indexOf(name) > -1;
scope.lexical.push(name);
if (this.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
} else if (bindingType === BIND_SIMPLE_CATCH) {
const scope = this.currentScope();
scope.lexical.push(name);
@@ -122,6 +127,10 @@ export default class ScopeHandler {
}
scope.var.push(name);
if (this.inModule && scope.flags & SCOPE_PROGRAM) {
this.undefinedExports.delete(name);
}
if (scope.flags & SCOPE_VAR) break;
}
}
@@ -130,6 +139,16 @@ export default class ScopeHandler {
}
}
checkLocalExport(id: N.Identifier) {
// scope.functions must be empty as Module code is always strict.
if (
this.scopeStack[0].lexical.indexOf(id.name) === -1 &&
this.scopeStack[0].var.indexOf(id.name) === -1
) {
this.undefinedExports.set(id.name, id.start);
}
}
currentScope(): Scope {
return this.scopeStack[this.scopeStack.length - 1];
}

1
packages/babel-parser/test/fixtures/core/scope/undecl-export-as-default/input.js vendored Normal file
View File

@@ -0,0 +1 @@
export { encrypt as default };

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-as-default/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'encrypt' is not defined (1:9)"
}

2
packages/babel-parser/test/fixtures/core/scope/undecl-export-as/input.js vendored Normal file
View File

@@ -0,0 +1,2 @@
export { encrypt as decrypt };
function decrypt() {}

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-as/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'encrypt' is not defined (1:9)"
}

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-block/input.js vendored Normal file
View File

@@ -0,0 +1,4 @@
{
function encrypt() {}
}
export { encrypt }

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-block/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'encrypt' is not defined (4:9)"
}

1
packages/babel-parser/test/fixtures/core/scope/undecl-export-builtin-as/input.js vendored Normal file
View File

@@ -0,0 +1 @@
export { Object as Obj };

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-builtin-as/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'Object' is not defined (1:9)"
}

1
packages/babel-parser/test/fixtures/core/scope/undecl-export-builtin/input.js vendored Normal file
View File

@@ -0,0 +1 @@
export { Object };

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-builtin/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'Object' is not defined (1:9)"
}

2
packages/babel-parser/test/fixtures/core/scope/undecl-export-if/input.js vendored Normal file
View File

@@ -0,0 +1,2 @@
export { encrypt };
if (true) function encrypt() {}

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-if/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "In strict mode code, functions can only be declared at top level or inside a block (2:10)"
}

4
packages/babel-parser/test/fixtures/core/scope/undecl-export-var/input.js vendored Normal file
View File

@@ -0,0 +1,4 @@
{
var encrypt
}
export { encrypt }

3
packages/babel-parser/test/fixtures/core/scope/undecl-export-var/options.json vendored Normal file
View File

@@ -0,0 +1,3 @@
{
"sourceType": "module"
}

172
packages/babel-parser/test/fixtures/core/scope/undecl-export-var/output.json vendored Normal file
View File

@@ -0,0 +1,172 @@
{
"type": "File",
"start": 0,
"end": 36,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 4,
"column": 18
}
},
"program": {
"type": "Program",
"start": 0,
"end": 36,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 4,
"column": 18
}
},
"sourceType": "module",
"interpreter": null,
"body": [
{
"type": "BlockStatement",
"start": 0,
"end": 17,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 3,
"column": 1
}
},
"body": [
{
"type": "VariableDeclaration",
"start": 4,
"end": 15,
"loc": {
"start": {
"line": 2,
"column": 2
},
"end": {
"line": 2,
"column": 13
}
},
"declarations": [
{
"type": "VariableDeclarator",
"start": 8,
"end": 15,
"loc": {
"start": {
"line": 2,
"column": 6
},
"end": {
"line": 2,
"column": 13
}
},
"id": {
"type": "Identifier",
"start": 8,
"end": 15,
"loc": {
"start": {
"line": 2,
"column": 6
},
"end": {
"line": 2,
"column": 13
},
"identifierName": "encrypt"
},
"name": "encrypt"
},
"init": null
}
],
"kind": "var"
}
],
"directives": []
},
{
"type": "ExportNamedDeclaration",
"start": 18,
"end": 36,
"loc": {
"start": {
"line": 4,
"column": 0
},
"end": {
"line": 4,
"column": 18
}
},
"specifiers": [
{
"type": "ExportSpecifier",
"start": 27,
"end": 34,
"loc": {
"start": {
"line": 4,
"column": 9
},
"end": {
"line": 4,
"column": 16
}
},
"local": {
"type": "Identifier",
"start": 27,
"end": 34,
"loc": {
"start": {
"line": 4,
"column": 9
},
"end": {
"line": 4,
"column": 16
},
"identifierName": "encrypt"
},
"name": "encrypt"
},
"exported": {
"type": "Identifier",
"start": 27,
"end": 34,
"loc": {
"start": {
"line": 4,
"column": 9
},
"end": {
"line": 4,
"column": 16
},
"identifierName": "encrypt"
},
"name": "encrypt"
}
}
],
"source": null,
"declaration": null
}
],
"directives": []
}
}

1
packages/babel-parser/test/fixtures/core/scope/undecl-export/input.js vendored Normal file
View File

@@ -0,0 +1 @@
export { encrypt };

4
packages/babel-parser/test/fixtures/core/scope/undecl-export/options.json vendored Normal file
View File

@@ -0,0 +1,4 @@
{
"sourceType": "module",
"throws": "Export 'encrypt' is not defined (1:9)"
}

2
packages/babel-parser/test/fixtures/es2015/modules/duplicate-named-export-builtin/input.js vendored
View File

@@ -1 +1,3 @@
const toString = 1;
export { toString };

114
packages/babel-parser/test/fixtures/es2015/modules/duplicate-named-export-builtin/output.json vendored
View File

@@ -1,28 +1,28 @@
{
"type": "File",
"start": 0,
"end": 20,
"end": 41,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 3,
"column": 20
}
},
"program": {
"type": "Program",
"start": 0,
"end": 20,
"end": 41,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 3,
"column": 20
}
},
@@ -30,9 +30,9 @@
"interpreter": null,
"body": [
{
"type": "ExportNamedDeclaration",
"type": "VariableDeclaration",
"start": 0,
"end": 20,
"end": 19,
"loc": {
"start": {
"line": 1,
@@ -40,36 +40,105 @@
},
"end": {
"line": 1,
"column": 20
"column": 19
}
},
"declaration": null,
"specifiers": [
"declarations": [
{
"type": "ExportSpecifier",
"start": 9,
"end": 17,
"type": "VariableDeclarator",
"start": 6,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 9
"column": 6
},
"end": {
"line": 1,
"column": 18
}
},
"id": {
"type": "Identifier",
"start": 6,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 6
},
"end": {
"line": 1,
"column": 14
},
"identifierName": "toString"
},
"name": "toString"
},
"init": {
"type": "NumericLiteral",
"start": 17,
"end": 18,
"loc": {
"start": {
"line": 1,
"column": 17
},
"end": {
"line": 1,
"column": 18
}
},
"extra": {
"rawValue": 1,
"raw": "1"
},
"value": 1
}
}
],
"kind": "const"
},
{
"type": "ExportNamedDeclaration",
"start": 21,
"end": 41,
"loc": {
"start": {
"line": 3,
"column": 0
},
"end": {
"line": 3,
"column": 20
}
},
"specifiers": [
{
"type": "ExportSpecifier",
"start": 30,
"end": 38,
"loc": {
"start": {
"line": 3,
"column": 9
},
"end": {
"line": 3,
"column": 17
}
},
"local": {
"type": "Identifier",
"start": 9,
"end": 17,
"start": 30,
"end": 38,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 9
},
"end": {
"line": 1,
"line": 3,
"column": 17
},
"identifierName": "toString"
@@ -78,15 +147,15 @@
},
"exported": {
"type": "Identifier",
"start": 9,
"end": 17,
"start": 30,
"end": 38,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 9
},
"end": {
"line": 1,
"line": 3,
"column": 17
},
"identifierName": "toString"
@@ -95,7 +164,8 @@
}
}
],
"source": null
"source": null,
"declaration": null
}
],
"directives": []

3
packages/babel-parser/test/fixtures/es2015/uncategorised/86/input.js vendored
View File

@@ -1 +1,2 @@
export { encrypt }
export { encrypt }
function encrypt () {}

68
packages/babel-parser/test/fixtures/es2015/uncategorised/86/output.json vendored
View File

@@ -1,29 +1,29 @@
{
"type": "File",
"start": 0,
"end": 18,
"end": 41,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 18
"line": 2,
"column": 22
}
},
"program": {
"type": "Program",
"start": 0,
"end": 18,
"end": 41,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"column": 18
"line": 2,
"column": 22
}
},
"sourceType": "module",
@@ -43,7 +43,6 @@
"column": 18
}
},
"declaration": null,
"specifiers": [
{
"type": "ExportSpecifier",
@@ -95,7 +94,60 @@
}
}
],
"source": null
"source": null,
"declaration": null
},
{
"type": "FunctionDeclaration",
"start": 19,
"end": 41,
"loc": {
"start": {
"line": 2,
"column": 0
},
"end": {
"line": 2,
"column": 22
}
},
"id": {
"type": "Identifier",
"start": 28,
"end": 35,
"loc": {
"start": {
"line": 2,
"column": 9
},
"end": {
"line": 2,
"column": 16
},
"identifierName": "encrypt"
},
"name": "encrypt"
},
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start": 39,
"end": 41,
"loc": {
"start": {
"line": 2,
"column": 20
},
"end": {
"line": 2,
"column": 22
}
},
"body": [],
"directives": []
}
}
],
"directives": []

4
packages/babel-parser/test/fixtures/es2015/uncategorised/87/input.js vendored
View File

@@ -1 +1,3 @@
export { encrypt, decrypt }
function encrypt () {}
class decrypt{}
export { encrypt, decrypt }

165
packages/babel-parser/test/fixtures/es2015/uncategorised/87/output.json vendored
View File

@@ -1,28 +1,28 @@
{
"type": "File",
"start": 0,
"end": 27,
"end": 66,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 3,
"column": 27
}
},
"program": {
"type": "Program",
"start": 0,
"end": 27,
"end": 66,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 3,
"column": 27
}
},
@@ -30,9 +30,9 @@
"interpreter": null,
"body": [
{
"type": "ExportNamedDeclaration",
"type": "FunctionDeclaration",
"start": 0,
"end": 27,
"end": 22,
"loc": {
"start": {
"line": 1,
@@ -40,36 +40,136 @@
},
"end": {
"line": 1,
"column": 22
}
},
"id": {
"type": "Identifier",
"start": 9,
"end": 16,
"loc": {
"start": {
"line": 1,
"column": 9
},
"end": {
"line": 1,
"column": 16
},
"identifierName": "encrypt"
},
"name": "encrypt"
},
"generator": false,
"async": false,
"params": [],
"body": {
"type": "BlockStatement",
"start": 20,
"end": 22,
"loc": {
"start": {
"line": 1,
"column": 20
},
"end": {
"line": 1,
"column": 22
}
},
"body": [],
"directives": []
}
},
{
"type": "ClassDeclaration",
"start": 23,
"end": 38,
"loc": {
"start": {
"line": 2,
"column": 0
},
"end": {
"line": 2,
"column": 15
}
},
"id": {
"type": "Identifier",
"start": 29,
"end": 36,
"loc": {
"start": {
"line": 2,
"column": 6
},
"end": {
"line": 2,
"column": 13
},
"identifierName": "decrypt"
},
"name": "decrypt"
},
"superClass": null,
"body": {
"type": "ClassBody",
"start": 36,
"end": 38,
"loc": {
"start": {
"line": 2,
"column": 13
},
"end": {
"line": 2,
"column": 15
}
},
"body": []
}
},
{
"type": "ExportNamedDeclaration",
"start": 39,
"end": 66,
"loc": {
"start": {
"line": 3,
"column": 0
},
"end": {
"line": 3,
"column": 27
}
},
"declaration": null,
"specifiers": [
{
"type": "ExportSpecifier",
"start": 9,
"end": 16,
"start": 48,
"end": 55,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 9
},
"end": {
"line": 1,
"line": 3,
"column": 16
}
},
"local": {
"type": "Identifier",
"start": 9,
"end": 16,
"start": 48,
"end": 55,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 9
},
"end": {
"line": 1,
"line": 3,
"column": 16
},
"identifierName": "encrypt"
@@ -78,15 +178,15 @@
},
"exported": {
"type": "Identifier",
"start": 9,
"end": 16,
"start": 48,
"end": 55,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 9
},
"end": {
"line": 1,
"line": 3,
"column": 16
},
"identifierName": "encrypt"
@@ -96,29 +196,29 @@
},
{
"type": "ExportSpecifier",
"start": 18,
"end": 25,
"start": 57,
"end": 64,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 18
},
"end": {
"line": 1,
"line": 3,
"column": 25
}
},
"local": {
"type": "Identifier",
"start": 18,
"end": 25,
"start": 57,
"end": 64,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 18
},
"end": {
"line": 1,
"line": 3,
"column": 25
},
"identifierName": "decrypt"
@@ -127,15 +227,15 @@
},
"exported": {
"type": "Identifier",
"start": 18,
"end": 25,
"start": 57,
"end": 64,
"loc": {
"start": {
"line": 1,
"line": 3,
"column": 18
},
"end": {
"line": 1,
"line": 3,
"column": 25
},
"identifierName": "decrypt"
@@ -144,7 +244,8 @@
}
}
],
"source": null
"source": null,
"declaration": null
}
],
"directives": []

3
packages/babel-parser/test/fixtures/es2015/uncategorised/88/input.js vendored
View File

@@ -1 +1,2 @@
export { encrypt as default }
import encrypt from "";
export { encrypt as default }

111
packages/babel-parser/test/fixtures/es2015/uncategorised/88/output.json vendored
View File

@@ -1,28 +1,28 @@
{
"type": "File",
"start": 0,
"end": 29,
"end": 53,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 2,
"column": 29
}
},
"program": {
"type": "Program",
"start": 0,
"end": 29,
"end": 53,
"loc": {
"start": {
"line": 1,
"column": 0
},
"end": {
"line": 1,
"line": 2,
"column": 29
}
},
@@ -30,9 +30,9 @@
"interpreter": null,
"body": [
{
"type": "ExportNamedDeclaration",
"type": "ImportDeclaration",
"start": 0,
"end": 29,
"end": 23,
"loc": {
"start": {
"line": 1,
@@ -40,36 +40,104 @@
},
"end": {
"line": 1,
"column": 29
"column": 23
}
},
"declaration": null,
"specifiers": [
{
"type": "ExportSpecifier",
"start": 9,
"end": 27,
"type": "ImportDefaultSpecifier",
"start": 7,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 9
"column": 7
},
"end": {
"line": 1,
"column": 14
}
},
"local": {
"type": "Identifier",
"start": 7,
"end": 14,
"loc": {
"start": {
"line": 1,
"column": 7
},
"end": {
"line": 1,
"column": 14
},
"identifierName": "encrypt"
},
"name": "encrypt"
}
}
],
"source": {
"type": "StringLiteral",
"start": 20,
"end": 22,
"loc": {
"start": {
"line": 1,
"column": 20
},
"end": {
"line": 1,
"column": 22
}
},
"extra": {
"rawValue": "",
"raw": "\"\""
},
"value": ""
}
},
{
"type": "ExportNamedDeclaration",
"start": 24,
"end": 53,
"loc": {
"start": {
"line": 2,
"column": 0
},
"end": {
"line": 2,
"column": 29
}
},
"specifiers": [
{
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View File

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165
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67
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128
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100
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95
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174
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2
packages/babel-parser/test/fixtures/esprima/es2015-export-declaration/export-named-specifiers/input.js vendored
View File

@@ -1 +1,3 @@
var foo;
export {foo, bar};
var bar;

174
packages/babel-parser/test/fixtures/esprima/es2015-export-declaration/export-named-specifiers/output.json vendored
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@@ -1,38 +1,38 @@
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@@ -78,15 +128,15 @@
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@@ -96,29 +146,29 @@
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1
packages/babel-parser/test/fixtures/flow/declare-export/export-named-pattern/input.js vendored
View File

@@ -1 +1,2 @@
declare module "foo" { declare export {a,}; }
var a;

65
packages/babel-parser/test/fixtures/flow/declare-export/export-named-pattern/output.json vendored
View File

@@ -1,29 +1,29 @@
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@@ -145,11 +144,63 @@
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1
packages/babel-parser/test/fixtures/flow/type-exports/specifier/input.js vendored
View File

@@ -1 +1,2 @@
let foo;
export type { foo };

87
packages/babel-parser/test/fixtures/flow/type-exports/specifier/output.json vendored
View File

@@ -1,28 +1,28 @@
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@@ -40,35 +40,86 @@
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