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Merge pull request #11721 from Microsoft/unusedLocals
Mark "React" symbol as referenced
2 parents 66857b5 + 23e9e0b commit 67873ca

17 files changed

+498
-2
lines changed

‎src/compiler/checker.ts

Lines changed: 8 additions & 2 deletions
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@@ -11079,14 +11079,20 @@ namespace ts {
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function checkJsxOpeningLikeElement(node: JsxOpeningLikeElement) {
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checkGrammarJsxElement(node);
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checkJsxPreconditions(node);
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// The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
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// is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
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const reactRefErr = compilerOptions.jsx === JsxEmit.React ? Diagnostics.Cannot_find_name_0 : undefined;
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const reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
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const reactSym = resolveName(node.tagName, reactNamespace, SymbolFlags.Value, reactRefErr, reactNamespace);
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if (reactSym) {
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getSymbolLinks(reactSym).referenced = true;
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// Mark local symbol as referenced here because it might not have been marked
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// if jsx emit was not react as there wont be error being emitted
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reactSym.isReferenced = true;
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// If react symbol is alias, mark it as refereced
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if (reactSym.flags & SymbolFlags.Alias && !isConstEnumOrConstEnumOnlyModule(resolveAlias(reactSym))) {
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markAliasSymbolAsReferenced(reactSym);
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}
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}
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const targetAttributesType = getJsxElementAttributesType(node);

‎tests/baselines/reference/unusedImports13.js

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//// [tests/cases/compiler/unusedImports13.ts] ////
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//// [foo.tsx]
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import React = require("react");
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export const FooComponent = <div></div>
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//// [index.d.ts]
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export = React;
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export as namespace React;
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declare namespace React {
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function createClass<P, S>(spec);
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}
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declare global {
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namespace JSX {
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}
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}
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//// [foo.jsx]
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"use strict";
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var React = require("react");
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exports.FooComponent = <div></div>;

‎tests/baselines/reference/unusedImports13.symbols

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=== tests/cases/compiler/foo.tsx ===
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import React = require("react");
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>React : Symbol(React, Decl(foo.tsx, 0, 0))
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export const FooComponent = <div></div>
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>FooComponent : Symbol(FooComponent, Decl(foo.tsx, 3, 12))
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>div : Symbol(unknown)
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>div : Symbol(unknown)
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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export as namespace React;
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>React : Symbol(React, Decl(index.d.ts, 0, 15))
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declare namespace React {
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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function createClass<P, S>(spec);
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>createClass : Symbol(createClass, Decl(index.d.ts, 3, 25))
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>P : Symbol(P, Decl(index.d.ts, 4, 25))
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>S : Symbol(S, Decl(index.d.ts, 4, 27))
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>spec : Symbol(spec, Decl(index.d.ts, 4, 31))
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}
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declare global {
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>global : Symbol(global, Decl(index.d.ts, 5, 1))
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namespace JSX {
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>JSX : Symbol(JSX, Decl(index.d.ts, 6, 16))
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}
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}
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‎tests/baselines/reference/unusedImports13.types

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=== tests/cases/compiler/foo.tsx ===
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import React = require("react");
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>React : typeof React
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export const FooComponent = <div></div>
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>FooComponent : any
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><div></div> : any
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>div : any
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>div : any
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : typeof React
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export as namespace React;
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>React : typeof React
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declare namespace React {
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>React : typeof React
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function createClass<P, S>(spec);
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>createClass : <P, S>(spec: any) => any
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>P : P
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>S : S
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>spec : any
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}
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declare global {
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>global : any
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namespace JSX {
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>JSX : any
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}
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}
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‎tests/baselines/reference/unusedImports14.js

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//// [tests/cases/compiler/unusedImports14.ts] ////
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//// [foo.tsx]
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import React = require("react");
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export const FooComponent = <div></div>
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//// [index.d.ts]
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export = React;
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export as namespace React;
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declare namespace React {
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function createClass<P, S>(spec);
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}
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declare global {
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namespace JSX {
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}
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}
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//// [foo.js]
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"use strict";
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var React = require("react");
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exports.FooComponent = React.createElement("div", null);

‎tests/baselines/reference/unusedImports14.symbols

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=== tests/cases/compiler/foo.tsx ===
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import React = require("react");
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>React : Symbol(React, Decl(foo.tsx, 0, 0))
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export const FooComponent = <div></div>
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>FooComponent : Symbol(FooComponent, Decl(foo.tsx, 3, 12))
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>div : Symbol(unknown)
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>div : Symbol(unknown)
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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export as namespace React;
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>React : Symbol(React, Decl(index.d.ts, 0, 15))
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declare namespace React {
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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function createClass<P, S>(spec);
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>createClass : Symbol(createClass, Decl(index.d.ts, 3, 25))
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>P : Symbol(P, Decl(index.d.ts, 4, 25))
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>S : Symbol(S, Decl(index.d.ts, 4, 27))
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>spec : Symbol(spec, Decl(index.d.ts, 4, 31))
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}
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declare global {
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>global : Symbol(global, Decl(index.d.ts, 5, 1))
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namespace JSX {
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>JSX : Symbol(JSX, Decl(index.d.ts, 6, 16))
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}
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}
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‎tests/baselines/reference/unusedImports14.types

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=== tests/cases/compiler/foo.tsx ===
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import React = require("react");
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>React : typeof React
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export const FooComponent = <div></div>
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>FooComponent : any
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><div></div> : any
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>div : any
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>div : any
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : typeof React
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export as namespace React;
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>React : typeof React
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declare namespace React {
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>React : typeof React
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function createClass<P, S>(spec);
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>createClass : <P, S>(spec: any) => any
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>P : P
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>S : S
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>spec : any
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}
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declare global {
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>global : any
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namespace JSX {
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>JSX : any
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}
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}
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‎tests/baselines/reference/unusedImports15.js

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//// [tests/cases/compiler/unusedImports15.ts] ////
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//// [foo.tsx]
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import Element = require("react");
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export const FooComponent = <div></div>
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//// [index.d.ts]
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export = React;
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export as namespace React;
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declare namespace React {
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function createClass<P, S>(spec);
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}
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declare global {
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namespace JSX {
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}
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}
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//// [foo.jsx]
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"use strict";
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var Element = require("react");
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exports.FooComponent = <div></div>;

‎tests/baselines/reference/unusedImports15.symbols

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=== tests/cases/compiler/foo.tsx ===
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import Element = require("react");
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>Element : Symbol(Element, Decl(foo.tsx, 0, 0))
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export const FooComponent = <div></div>
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>FooComponent : Symbol(FooComponent, Decl(foo.tsx, 3, 12))
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>div : Symbol(unknown)
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>div : Symbol(unknown)
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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export as namespace React;
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>React : Symbol(React, Decl(index.d.ts, 0, 15))
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declare namespace React {
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>React : Symbol(React, Decl(index.d.ts, 1, 26))
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function createClass<P, S>(spec);
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>createClass : Symbol(createClass, Decl(index.d.ts, 3, 25))
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>P : Symbol(P, Decl(index.d.ts, 4, 25))
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>S : Symbol(S, Decl(index.d.ts, 4, 27))
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>spec : Symbol(spec, Decl(index.d.ts, 4, 31))
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}
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declare global {
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>global : Symbol(global, Decl(index.d.ts, 5, 1))
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namespace JSX {
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>JSX : Symbol(JSX, Decl(index.d.ts, 6, 16))
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}
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}
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‎tests/baselines/reference/unusedImports15.types

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=== tests/cases/compiler/foo.tsx ===
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import Element = require("react");
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>Element : typeof Element
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export const FooComponent = <div></div>
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>FooComponent : any
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><div></div> : any
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>div : any
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>div : any
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=== tests/cases/compiler/node_modules/@types/react/index.d.ts ===
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export = React;
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>React : typeof React
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export as namespace React;
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>React : typeof React
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declare namespace React {
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>React : typeof React
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function createClass<P, S>(spec);
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>createClass : <P, S>(spec: any) => any
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>P : P
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>S : S
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>spec : any
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}
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declare global {
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>global : any
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namespace JSX {
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>JSX : any
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}
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}
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