sucrase - npm Package Compare versions

Comparing version 1.13.0 to 1.14.0

dist/src/cli.js

@@ -40,3 +40,3 @@ "use strict";
     const extension = transforms.includes("typescript") ? ".ts" : ".js";
-    if (!await fs_1.exists(outDirPath)) {
+    if (!(await fs_1.exists(outDirPath))) {
         await fs_1.mkdir(outDirPath);
@@ -43,0 +43,0 @@ }

dist/src/ImportProcessor.js

@@ -172,3 +172,3 @@ "use strict";
         index++;
-        if ((this.tokens.matchesContextualAtIndex(index, 28 /* _type */) ||
+        if ((this.tokens.matchesContextualAtIndex(index, 30 /* _type */) ||
             this.tokens.matchesAtIndex(index, [46736 /* _typeof */])) &&
@@ -296,3 +296,3 @@ !this.tokens.matchesAtIndex(index + 1, [7168 /* comma */]) &&
             let isTypeImport = false;
-            if ((this.tokens.matchesContextualAtIndex(index, 28 /* _type */) ||
+            if ((this.tokens.matchesContextualAtIndex(index, 30 /* _type */) ||
                 this.tokens.matchesAtIndex(index, [46736 /* _typeof */])) &&
@@ -299,0 +299,0 @@ this.tokens.matchesAtIndex(index + 1, [2048 /* name */]) &&

dist/src/transformers/ImportTransformer.js

@@ -98,3 +98,3 @@ "use strict";
         this.tokens.removeInitialToken();
-        if (this.tokens.matchesContextual(28 /* _type */) &&
+        if (this.tokens.matchesContextual(30 /* _type */) &&
             !this.tokens.matchesAtIndex(this.tokens.currentIndex() + 1, [7168 /* comma */]) &&
@@ -265,2 +265,5 @@ !this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 1, 10 /* _from */)) {
         }
+        else if (this.tokens.matches3(42512 /* _export */, 31760 /* _default */, 13312 /* at */)) {
+            throw new Error("Export default statements with decorators are not yet supported.");
+        }
         else {
@@ -267,0 +270,0 @@ this.tokens.replaceToken("exports.");

dist/src/transformers/ReactDisplayNameTransformer.js

@@ -22,3 +22,3 @@ "use strict";
         const startIndex = this.tokens.currentIndex();
-        if (this.tokens.matchesContextual(32 /* _createReactClass */)) {
+        if (this.tokens.matchesContextual(34 /* _createReactClass */)) {
             const newName = this.importProcessor.getIdentifierReplacement("createReactClass");
@@ -35,4 +35,4 @@ if (newName) {
         if (this.tokens.matches3(2048 /* name */, 9216 /* dot */, 2048 /* name */) &&
-            this.tokens.matchesContextual(30 /* _React */) &&
-            this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, 31 /* _createClass */)) {
+            this.tokens.matchesContextual(32 /* _React */) &&
+            this.tokens.matchesContextualAtIndex(this.tokens.currentIndex() + 2, 33 /* _createClass */)) {
             const newName = this.importProcessor.getIdentifierReplacement("React");
@@ -108,3 +108,3 @@ if (newName) {
             }
-            if (this.tokens.matchesContextualAtIndex(index, 33 /* _displayName */) &&
+            if (this.tokens.matchesContextualAtIndex(index, 35 /* _displayName */) &&
                 this.tokens.tokens[index].identifierRole === tokenizer_1.IdentifierRole.ObjectKey &&
@@ -111,0 +111,0 @@ token.contextId === objectContextId) {

dist/sucrase-babylon/parser/expression.js

@@ -805,2 +805,3 @@ "use strict";
         lval_1.parseSpread();
+        parseParenItem();
     }
@@ -810,5 +811,2 @@ else {
     }
-    if (base_1.hasPlugin("flow") && tokenizer_1.match(8192 /* colon */)) {
-        flow_1.flowParseTypeAnnotation();
-    }
 }
@@ -815,0 +813,0 @@ // Parse the next token as an identifier.

dist/sucrase-babylon/parser/lval.js

@@ -92,3 +92,3 @@ "use strict";
         typescript_1.tsParseAccessModifier();
-        typescript_1.tsParseModifier([25 /* _readonly */]);
+        typescript_1.tsParseModifier([26 /* _readonly */]);
     }
@@ -95,0 +95,0 @@ parseMaybeDefault(isBlockScope);

dist/sucrase-babylon/parser/statement.js

@@ -177,5 +177,11 @@ "use strict";
     tokenizer_1.next();
-    expression_1.parseIdentifier();
-    while (tokenizer_1.eat(9216 /* dot */)) {
+    if (tokenizer_1.eat(6144 /* parenL */)) {
+        expression_1.parseExpression();
+        util_1.expect(6656 /* parenR */);
+    }
+    else {
         expression_1.parseIdentifier();
+        while (tokenizer_1.eat(9216 /* dot */)) {
+            expression_1.parseIdentifier();
+        }
     }
@@ -236,3 +242,3 @@ if (tokenizer_1.eat(6144 /* parenL */)) {
         parseVar(true, varKind);
-        if (tokenizer_1.match(45592 /* _in */) || util_1.isContextual(20 /* _of */)) {
+        if (tokenizer_1.match(45592 /* _in */) || util_1.isContextual(21 /* _of */)) {
             parseForIn(forAwait);
@@ -245,3 +251,3 @@ return;
     expression_1.parseExpression(true);
-    if (tokenizer_1.match(45592 /* _in */) || util_1.isContextual(20 /* _of */)) {
+    if (tokenizer_1.match(45592 /* _in */) || util_1.isContextual(21 /* _of */)) {
         parseForIn(forAwait);
@@ -408,3 +414,3 @@ return;
     if (forAwait) {
-        util_1.eatContextual(20 /* _of */);
+        util_1.eatContextual(21 /* _of */);
     }
@@ -526,3 +532,3 @@ else {
 function isClassProperty() {
-    return tokenizer_1.match(14368 /* eq */) || tokenizer_1.match(7680 /* semi */) || tokenizer_1.match(5120 /* braceR */) || tokenizer_1.match(8192 /* colon */);
+    return tokenizer_1.match(14368 /* eq */) || tokenizer_1.match(7680 /* semi */) || tokenizer_1.match(5120 /* braceR */) || tokenizer_1.match(16000 /* bang */) || tokenizer_1.match(8192 /* colon */);
 }
@@ -551,3 +557,3 @@ function isClassMethod() {
     let isStatic = false;
-    if (tokenizer_1.match(2048 /* name */) && base_1.state.contextualKeyword === 27 /* _static */) {
+    if (tokenizer_1.match(2048 /* name */) && base_1.state.contextualKeyword === 29 /* _static */) {
         expression_1.parseIdentifier(); // eats 'static'
@@ -608,3 +614,3 @@ if (isClassMethod()) {
     else if ((token.contextualKeyword === 11 /* _get */ ||
-        token.contextualKeyword === 29 /* _set */) &&
+        token.contextualKeyword === 28 /* _set */) &&
         !(util_1.isLineTerminator() && tokenizer_1.match(24587 /* star */))) {
@@ -647,3 +653,2 @@ if (token.contextualKeyword === 11 /* _get */) {
 exports.parseClassPropertyName = parseClassPropertyName;
-// Overridden in typescript.js
 function parsePostMemberNameModifiers() {
@@ -657,2 +662,3 @@ if (base_1.hasPlugin("typescript")) {
     if (base_1.hasPlugin("typescript")) {
+        tokenizer_1.eat(16000 /* bang */);
         typescript_1.tsTryParseTypeAnnotation();
@@ -768,2 +774,6 @@ }
     }
+    else if (tokenizer_1.match(13312 /* at */)) {
+        parseDecorators();
+        parseClass(true, true);
+    }
     else {
@@ -770,0 +780,0 @@ expression_1.parseMaybeAssign();

dist/sucrase-babylon/plugins/flow.js

@@ -67,3 +67,3 @@ "use strict";
     }
-    else if (util_1.isContextual(18 /* _module */)) {
+    else if (util_1.isContextual(19 /* _module */)) {
         if (tokenizer_1.lookaheadType() === 9216 /* dot */) {
@@ -76,9 +76,9 @@ flowParseDeclareModuleExports();
     }
-    else if (util_1.isContextual(28 /* _type */)) {
+    else if (util_1.isContextual(30 /* _type */)) {
         flowParseDeclareTypeAlias();
     }
-    else if (util_1.isContextual(21 /* _opaque */)) {
+    else if (util_1.isContextual(22 /* _opaque */)) {
         flowParseDeclareOpaqueType();
     }
-    else if (util_1.isContextual(14 /* _interface */)) {
+    else if (util_1.isContextual(15 /* _interface */)) {
         flowParseDeclareInterface();
@@ -132,3 +132,3 @@ }
         tokenizer_1.match(41488 /* _class */) || // declare export class ...
-        util_1.isContextual(21 /* _opaque */) // declare export opaque ..
+        util_1.isContextual(22 /* _opaque */) // declare export opaque ..
     ) {
@@ -139,5 +139,5 @@ flowParseDeclare();
         tokenizer_1.match(4096 /* braceL */) || // declare export {} ...
-        util_1.isContextual(14 /* _interface */) || // declare export interface ...
-        util_1.isContextual(28 /* _type */) || // declare export type ...
-        util_1.isContextual(21 /* _opaque */) // declare export opaque type ...
+        util_1.isContextual(15 /* _interface */) || // declare export interface ...
+        util_1.isContextual(30 /* _type */) || // declare export type ...
+        util_1.isContextual(22 /* _opaque */) // declare export opaque type ...
     ) {
@@ -151,3 +151,3 @@ statement_1.parseExport();
 function flowParseDeclareModuleExports() {
-    util_1.expectContextual(18 /* _module */);
+    util_1.expectContextual(19 /* _module */);
     util_1.expect(9216 /* dot */);
@@ -181,3 +181,3 @@ util_1.expectContextual(9 /* _exports */);
     }
-    if (util_1.isContextual(17 /* _mixins */)) {
+    if (util_1.isContextual(18 /* _mixins */)) {
         tokenizer_1.next();
@@ -188,2 +188,8 @@ do {
     }
+    if (util_1.isContextual(13 /* _implements */)) {
+        tokenizer_1.next();
+        do {
+            flowParseInterfaceExtends();
+        } while (tokenizer_1.eat(7168 /* comma */));
+    }
     flowParseObjectType(true, false);
@@ -212,3 +218,3 @@ }
 function flowParseOpaqueType(declare) {
-    util_1.expectContextual(28 /* _type */);
+    util_1.expectContextual(30 /* _type */);
     flowParseRestrictedIdentifier();
@@ -317,3 +323,3 @@ if (tokenizer_1.match(21000 /* lessThan */)) {
         let isStatic = false;
-        if (allowStatic && util_1.isContextual(27 /* _static */) && tokenizer_1.lookaheadType() !== 8192 /* colon */) {
+        if (allowStatic && util_1.isContextual(29 /* _static */) && tokenizer_1.lookaheadType() !== 8192 /* colon */) {
             tokenizer_1.next();
@@ -330,3 +336,3 @@ isStatic = true;
         else {
-            if (util_1.isContextual(11 /* _get */) || util_1.isContextual(29 /* _set */)) {
+            if (util_1.isContextual(11 /* _get */) || util_1.isContextual(28 /* _set */)) {
                 const lookahead = tokenizer_1.lookaheadType();
@@ -567,3 +573,3 @@ if (lookahead === 2048 /* name */ || lookahead === 1536 /* string */ || lookahead === 0 /* num */) {
 function flowTryParseStatement() {
-    if (tokenizer_1.match(2048 /* name */) && base_1.state.contextualKeyword === 14 /* _interface */) {
+    if (tokenizer_1.match(2048 /* name */) && base_1.state.contextualKeyword === 15 /* _interface */) {
         tokenizer_1.runInTypeContext(0, () => {
@@ -594,3 +600,3 @@ tokenizer_1.next();
     else if (tokenizer_1.match(2048 /* name */)) {
-        if (contextualKeyword === 14 /* _interface */) {
+        if (contextualKeyword === 15 /* _interface */) {
             tokenizer_1.runInTypeContext(1, () => {
@@ -600,3 +606,3 @@ flowParseInterface();
         }
-        else if (contextualKeyword === 28 /* _type */) {
+        else if (contextualKeyword === 30 /* _type */) {
             tokenizer_1.runInTypeContext(1, () => {
@@ -606,3 +612,3 @@ flowParseTypeAlias();
         }
-        else if (contextualKeyword === 21 /* _opaque */) {
+        else if (contextualKeyword === 22 /* _opaque */) {
             tokenizer_1.runInTypeContext(1, () => {
@@ -618,5 +624,5 @@ flowParseOpaqueType(false);
 function flowShouldParseExportDeclaration() {
-    return (util_1.isContextual(28 /* _type */) ||
-        util_1.isContextual(14 /* _interface */) ||
-        util_1.isContextual(21 /* _opaque */));
+    return (util_1.isContextual(30 /* _type */) ||
+        util_1.isContextual(15 /* _interface */) ||
+        util_1.isContextual(22 /* _opaque */));
 }
@@ -626,9 +632,9 @@ exports.flowShouldParseExportDeclaration = flowShouldParseExportDeclaration;
     return (tokenizer_1.match(2048 /* name */) &&
-        (base_1.state.contextualKeyword === 28 /* _type */ ||
-            base_1.state.contextualKeyword === 14 /* _interface */ ||
-            base_1.state.contextualKeyword === 21 /* _opaque */));
+        (base_1.state.contextualKeyword === 30 /* _type */ ||
+            base_1.state.contextualKeyword === 15 /* _interface */ ||
+            base_1.state.contextualKeyword === 22 /* _opaque */));
 }
 exports.flowShouldDisallowExportDefaultSpecifier = flowShouldDisallowExportDefaultSpecifier;
 function flowParseExportDeclaration() {
-    if (util_1.isContextual(28 /* _type */)) {
+    if (util_1.isContextual(30 /* _type */)) {
         tokenizer_1.runInTypeContext(1, () => {
@@ -647,3 +653,3 @@ tokenizer_1.next();
     }
-    else if (util_1.isContextual(21 /* _opaque */)) {
+    else if (util_1.isContextual(22 /* _opaque */)) {
         tokenizer_1.runInTypeContext(1, () => {
@@ -655,3 +661,3 @@ tokenizer_1.next();
     }
-    else if (util_1.isContextual(14 /* _interface */)) {
+    else if (util_1.isContextual(15 /* _interface */)) {
         tokenizer_1.runInTypeContext(1, () => {
@@ -668,7 +674,7 @@ tokenizer_1.next();
 function flowShouldParseExportStar() {
-    return tokenizer_1.match(24587 /* star */) || (util_1.isContextual(28 /* _type */) && tokenizer_1.lookaheadType() === 24587 /* star */);
+    return tokenizer_1.match(24587 /* star */) || (util_1.isContextual(30 /* _type */) && tokenizer_1.lookaheadType() === 24587 /* star */);
 }
 exports.flowShouldParseExportStar = flowShouldParseExportStar;
 function flowParseExportStar() {
-    if (util_1.eatContextual(28 /* _type */)) {
+    if (util_1.eatContextual(30 /* _type */)) {
         tokenizer_1.runInTypeContext(2, () => {
@@ -727,3 +733,3 @@ statement_1.baseParseExportStar();
     }
-    else if (util_1.isContextual(28 /* _type */)) {
+    else if (util_1.isContextual(30 /* _type */)) {
         kind = "type";
@@ -741,3 +747,3 @@ }
 function flowParseImportSpecifier() {
-    const isTypeKeyword = base_1.state.contextualKeyword === 28 /* _type */ || base_1.state.type === 46736 /* _typeof */;
+    const isTypeKeyword = base_1.state.contextualKeyword === 30 /* _type */ || base_1.state.type === 46736 /* _typeof */;
     if (isTypeKeyword) {
@@ -744,0 +750,0 @@ tokenizer_1.next();

dist/sucrase-babylon/plugins/typescript.d.ts

@@ -10,2 +10,3 @@ import { ContextualKeyword } from "../tokenizer";
 export declare function tsParseType(): void;
+export declare function tsParseNonConditionalType(): void;
 export declare function tsParseTypeAssertion(): void;
@@ -12,0 +13,0 @@ export declare function tsParseImportEqualsDeclaration(): void;

dist/sucrase-babylon/plugins/typescript.js

@@ -40,3 +40,3 @@ "use strict";
         switch (modifier) {
-            case 25 /* _readonly */:
+            case 26 /* _readonly */:
                 base_1.state.tokens[base_1.state.tokens.length - 1].type = 50192 /* _readonly */;
@@ -47,12 +47,12 @@ break;
                 break;
-            case 27 /* _static */:
+            case 29 /* _static */:
                 base_1.state.tokens[base_1.state.tokens.length - 1].type = 51216 /* _static */;
                 break;
-            case 24 /* _public */:
+            case 25 /* _public */:
                 base_1.state.tokens[base_1.state.tokens.length - 1].type = 51728 /* _public */;
                 break;
-            case 22 /* _private */:
+            case 23 /* _private */:
                 base_1.state.tokens[base_1.state.tokens.length - 1].type = 52240 /* _private */;
                 break;
-            case 23 /* _protected */:
+            case 24 /* _protected */:
                 base_1.state.tokens[base_1.state.tokens.length - 1].type = 52752 /* _protected */;
@@ -246,3 +246,3 @@ break;
     }
-    const readonly = !!tsParseModifier([25 /* _readonly */]);
+    const readonly = !!tsParseModifier([26 /* _readonly */]);
     const found = tsTryParseIndexSignature();
@@ -268,3 +268,6 @@ if (found) {
     tokenizer_1.next();
-    if (util_1.isContextual(25 /* _readonly */)) {
+    if (tokenizer_1.eat(23178 /* plus */) || tokenizer_1.eat(23690 /* minus */)) {
+        return util_1.isContextual(26 /* _readonly */);
+    }
+    if (util_1.isContextual(26 /* _readonly */)) {
         tokenizer_1.next();
@@ -289,7 +292,19 @@ }
     util_1.expect(4096 /* braceL */);
-    util_1.eatContextual(25 /* _readonly */);
+    if (tokenizer_1.match(23178 /* plus */) || tokenizer_1.match(23690 /* minus */)) {
+        tokenizer_1.next();
+        util_1.expectContextual(26 /* _readonly */);
+    }
+    else {
+        util_1.eatContextual(26 /* _readonly */);
+    }
     util_1.expect(3072 /* bracketL */);
     tsParseMappedTypeParameter();
     util_1.expect(3584 /* bracketR */);
-    tokenizer_1.eat(9728 /* question */);
+    if (tokenizer_1.match(23178 /* plus */) || tokenizer_1.match(23690 /* minus */)) {
+        tokenizer_1.next();
+        util_1.expect(9728 /* question */);
+    }
+    else {
+        tokenizer_1.eat(9728 /* question */);
+    }
     tsTryParseType();
@@ -336,3 +351,3 @@ util_1.semicolon();
             tsParseThisTypeNode();
-            if (util_1.isContextual(15 /* _is */) && !util_1.hasPrecedingLineBreak()) {
+            if (util_1.isContextual(16 /* _is */) && !util_1.hasPrecedingLineBreak()) {
                 tsParseThisTypePredicate();
@@ -374,6 +389,14 @@ }
 }
+function tsParseInferType() {
+    util_1.expectContextual(14 /* _infer */);
+    expression_1.parseIdentifier();
+}
 function tsParseTypeOperatorOrHigher() {
-    if (util_1.eatContextual(16 /* _keyof */)) {
+    if (util_1.isContextual(17 /* _keyof */) || util_1.isContextual(31 /* _unique */)) {
+        tokenizer_1.next();
         tsParseTypeOperatorOrHigher();
     }
+    else if (util_1.isContextual(14 /* _infer */)) {
+        tsParseInferType();
+    }
     else {
@@ -463,3 +486,3 @@ tsParseArrayTypeOrHigher();
     expression_1.parseIdentifier();
-    if (util_1.isContextual(15 /* _is */) && !util_1.hasPrecedingLineBreak()) {
+    if (util_1.isContextual(16 /* _is */) && !util_1.hasPrecedingLineBreak()) {
         tokenizer_1.next();
@@ -478,2 +501,17 @@ return true;
 function tsParseType() {
+    tsParseNonConditionalType();
+    if (util_1.hasPrecedingLineBreak() || !tokenizer_1.eat(42000 /* _extends */)) {
+        return;
+    }
+    // extends type
+    tsParseNonConditionalType();
+    util_1.expect(9728 /* question */);
+    // true type
+    tsParseType();
+    util_1.expect(8192 /* colon */);
+    // false type
+    tsParseType();
+}
+exports.tsParseType = tsParseType;
+function tsParseNonConditionalType() {
     if (tsIsStartOfFunctionType()) {
@@ -490,3 +528,3 @@ tsParseFunctionOrConstructorType("TSFunctionType");
 }
-exports.tsParseType = tsParseType;
+exports.tsParseNonConditionalType = tsParseNonConditionalType;
 function tsParseTypeAssertion() {
@@ -597,3 +635,3 @@ tokenizer_1.runInTypeContext(1, () => {
 function tsIsExternalModuleReference() {
-    return util_1.isContextual(26 /* _require */) && tokenizer_1.lookaheadType() === 6144 /* parenL */;
+    return util_1.isContextual(27 /* _require */) && tokenizer_1.lookaheadType() === 6144 /* parenL */;
 }
@@ -609,3 +647,3 @@ function tsParseModuleReference() {
 function tsParseExternalModuleReference() {
-    util_1.expectContextual(26 /* _require */);
+    util_1.expectContextual(27 /* _require */);
     util_1.expect(6144 /* parenL */);
@@ -756,3 +794,3 @@ if (!tokenizer_1.match(1536 /* string */)) {
             break;
-        case 14 /* _interface */:
+        case 15 /* _interface */:
             if (isBeforeToken || tokenizer_1.match(2048 /* name */)) {
@@ -769,3 +807,3 @@ // `next` is true in "export" and "declare" contexts, so we want to remove that token
             break;
-        case 18 /* _module */:
+        case 19 /* _module */:
             if (isBeforeToken)
@@ -786,3 +824,3 @@ tokenizer_1.next();
             break;
-        case 19 /* _namespace */:
+        case 20 /* _namespace */:
             if (isBeforeToken || tokenizer_1.match(2048 /* name */)) {
@@ -797,3 +835,3 @@ tokenizer_1.runInTypeContext(1, () => {
             break;
-        case 28 /* _type */:
+        case 30 /* _type */:
             if (isBeforeToken || tokenizer_1.match(2048 /* name */)) {
@@ -843,6 +881,6 @@ tokenizer_1.runInTypeContext(1, () => {
             case 8 /* _enum */:
-            case 14 /* _interface */:
-            case 18 /* _module */:
-            case 19 /* _namespace */:
-            case 28 /* _type */:
+            case 15 /* _interface */:
+            case 19 /* _module */:
+            case 20 /* _namespace */:
+            case 30 /* _type */:
                 return true;
@@ -936,3 +974,3 @@ default:
         // See `parseNamespaceExportDeclaration` in TypeScript's own parser
-        util_1.expectContextual(19 /* _namespace */);
+        util_1.expectContextual(20 /* _namespace */);
         expression_1.parseIdentifier();
@@ -973,5 +1011,5 @@ util_1.semicolon();
     tsParseModifier([
-        24 /* _public */,
-        23 /* _protected */,
-        22 /* _private */,
+        25 /* _public */,
+        24 /* _protected */,
+        23 /* _private */,
     ]);
@@ -983,5 +1021,5 @@ }
     let isReadonly = false;
-    const mod = tsParseModifier([1 /* _abstract */, 25 /* _readonly */]);
+    const mod = tsParseModifier([1 /* _abstract */, 26 /* _readonly */]);
     switch (mod) {
-        case 25 /* _readonly */:
+        case 26 /* _readonly */:
             isReadonly = true;
@@ -992,3 +1030,3 @@ isAbstract = !!tsParseModifier([1 /* _abstract */]);
             isAbstract = true;
-            isReadonly = !!tsParseModifier([25 /* _readonly */]);
+            isReadonly = !!tsParseModifier([26 /* _readonly */]);
             break;
@@ -1078,2 +1116,3 @@ default:
 function tsAfterParseVarHead() {
+    tokenizer_1.eat(16000 /* bang */);
     tsTryParseTypeAnnotation();
@@ -1080,0 +1119,0 @@ }

dist/sucrase-babylon/tokenizer/index.d.ts

@@ -25,22 +25,24 @@ import { TokenType } from "./types";
     _implements = 13,
-    _interface = 14,
-    _is = 15,
-    _keyof = 16,
-    _mixins = 17,
-    _module = 18,
-    _namespace = 19,
-    _of = 20,
-    _opaque = 21,
-    _private = 22,
-    _protected = 23,
-    _public = 24,
-    _readonly = 25,
-    _require = 26,
-    _static = 27,
-    _type = 28,
-    _set = 29,
-    _React = 30,
-    _createClass = 31,
-    _createReactClass = 32,
-    _displayName = 33,
+    _infer = 14,
+    _interface = 15,
+    _is = 16,
+    _keyof = 17,
+    _mixins = 18,
+    _module = 19,
+    _namespace = 20,
+    _of = 21,
+    _opaque = 22,
+    _private = 23,
+    _protected = 24,
+    _public = 25,
+    _readonly = 26,
+    _require = 27,
+    _set = 28,
+    _static = 29,
+    _type = 30,
+    _unique = 31,
+    _React = 32,
+    _createClass = 33,
+    _createReactClass = 34,
+    _displayName = 35,
 }
@@ -47,0 +49,0 @@ export declare class Token {

dist/sucrase-babylon/tokenizer/index.js

@@ -125,3 +125,5 @@ "use strict";
     // identifiers, so '\' also dispatches to that.
-    if (identifier_1.isIdentifierStart(code) || code === 92 /* backslash */) {
+    if (identifier_1.isIdentifierStart(code) ||
+        code === 92 /* backslash */ ||
+        (code === 64 /* atSign */ && base_1.input.charCodeAt(base_1.state.pos + 1) === 64 /* atSign */)) {
         readWord_1.default();
@@ -258,3 +260,10 @@ }
     if (nextChar === code) {
-        finishOp(code === 124 /* verticalBar */ ? 17922 /* logicalOR */ : 18435 /* logicalAND */, 2);
+        if (base_1.input.charCodeAt(base_1.state.pos + 2) === 61 /* equalsTo */) {
+            // ||= or &&=
+            finishOp(14880 /* assign */, 3);
+        }
+        else {
+            // || or &&
+            finishOp(code === 124 /* verticalBar */ ? 17922 /* logicalOR */ : 18435 /* logicalAND */, 2);
+        }
         return;
@@ -357,4 +366,10 @@ }
     if (nextChar === 63 /* questionMark */) {
-        // '??'
-        finishOp(17410 /* nullishCoalescing */, 2);
+        if (nextChar2 === 61 /* equalsTo */) {
+            // '??='
+            finishOp(14880 /* assign */, 3);
+        }
+        else {
+            // '??'
+            finishOp(17410 /* nullishCoalescing */, 2);
+        }
     }
@@ -361,0 +376,0 @@ else if (nextChar === 46 /* dot */ &&

dist/sucrase-babylon/tokenizer/readWord.js

@@ -23,3 +23,3 @@ "use strict";
                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                index_1.finishToken(2048 /* name */, 30 /* _React */);
+                index_1.finishToken(2048 /* name */, 32 /* _React */);
                 return;
@@ -175,3 +175,3 @@ }
                                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                                index_1.finishToken(2048 /* name */, 31 /* _createClass */);
+                                                index_1.finishToken(2048 /* name */, 33 /* _createClass */);
                                                 return;
@@ -192,3 +192,3 @@ }
                                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                                index_1.finishToken(2048 /* name */, 32 /* _createReactClass */);
+                                                index_1.finishToken(2048 /* name */, 34 /* _createReactClass */);
                                                 return;
@@ -267,3 +267,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 33 /* _displayName */);
+                        index_1.finishToken(2048 /* name */, 35 /* _displayName */);
                         return;
@@ -460,2 +460,11 @@ }
                     switch (base_1.input.charCodeAt(base_1.state.pos++)) {
+                        case 102 /* lowercaseF */:
+                            if (base_1.input.charCodeAt(base_1.state.pos++) === 101 /* lowercaseE */ &&
+                                base_1.input.charCodeAt(base_1.state.pos++) === 114 /* lowercaseR */ &&
+                                !identifier_1.isIdentifierChar(base_1.input.charCodeAt(base_1.state.pos)) &&
+                                base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
+                                index_1.finishToken(2048 /* name */, 14 /* _infer */);
+                                return;
+                            }
+                            break;
                         case 115 /* lowercaseS */:
@@ -484,3 +493,3 @@ if (base_1.input.charCodeAt(base_1.state.pos++) === 116 /* lowercaseT */ &&
                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                index_1.finishToken(2048 /* name */, 14 /* _interface */);
+                                index_1.finishToken(2048 /* name */, 15 /* _interface */);
                                 return;
@@ -494,3 +503,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 15 /* _is */);
+                        index_1.finishToken(2048 /* name */, 16 /* _is */);
                         return;
@@ -508,3 +517,3 @@ }
                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                index_1.finishToken(2048 /* name */, 16 /* _keyof */);
+                index_1.finishToken(2048 /* name */, 17 /* _keyof */);
                 return;
@@ -531,3 +540,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 17 /* _mixins */);
+                        index_1.finishToken(2048 /* name */, 18 /* _mixins */);
                         return;
@@ -543,3 +552,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 18 /* _module */);
+                        index_1.finishToken(2048 /* name */, 19 /* _module */);
                         return;
@@ -562,3 +571,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 19 /* _namespace */);
+                        index_1.finishToken(2048 /* name */, 20 /* _namespace */);
                         return;
@@ -591,3 +600,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 20 /* _of */);
+                        index_1.finishToken(2048 /* name */, 21 /* _of */);
                         return;
@@ -603,3 +612,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 21 /* _opaque */);
+                        index_1.finishToken(2048 /* name */, 22 /* _opaque */);
                         return;
@@ -621,3 +630,3 @@ }
                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                index_1.finishToken(2048 /* name */, 22 /* _private */);
+                                index_1.finishToken(2048 /* name */, 23 /* _private */);
                                 return;
@@ -635,3 +644,3 @@ }
                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                index_1.finishToken(2048 /* name */, 23 /* _protected */);
+                                index_1.finishToken(2048 /* name */, 24 /* _protected */);
                                 return;
@@ -649,3 +658,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 24 /* _public */);
+                        index_1.finishToken(2048 /* name */, 25 /* _public */);
                         return;
@@ -667,3 +676,3 @@ }
                             base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                            index_1.finishToken(2048 /* name */, 25 /* _readonly */);
+                            index_1.finishToken(2048 /* name */, 26 /* _readonly */);
                             return;
@@ -679,3 +688,3 @@ }
                             base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                            index_1.finishToken(2048 /* name */, 26 /* _require */);
+                            index_1.finishToken(2048 /* name */, 27 /* _require */);
                             return;
@@ -703,3 +712,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 29 /* _set */);
+                        index_1.finishToken(2048 /* name */, 28 /* _set */);
                         return;
@@ -715,3 +724,3 @@ }
                         base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                        index_1.finishToken(2048 /* name */, 27 /* _static */);
+                        index_1.finishToken(2048 /* name */, 29 /* _static */);
                         return;
@@ -790,3 +799,3 @@ }
                                 base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
-                                index_1.finishToken(2048 /* name */, 28 /* _type */);
+                                index_1.finishToken(2048 /* name */, 30 /* _type */);
                                 return;
@@ -806,2 +815,14 @@ }
             break;
+        case 117 /* lowercaseU */:
+            if (base_1.input.charCodeAt(base_1.state.pos++) === 110 /* lowercaseN */ &&
+                base_1.input.charCodeAt(base_1.state.pos++) === 105 /* lowercaseI */ &&
+                base_1.input.charCodeAt(base_1.state.pos++) === 113 /* lowercaseQ */ &&
+                base_1.input.charCodeAt(base_1.state.pos++) === 117 /* lowercaseU */ &&
+                base_1.input.charCodeAt(base_1.state.pos++) === 101 /* lowercaseE */ &&
+                !identifier_1.isIdentifierChar(base_1.input.charCodeAt(base_1.state.pos)) &&
+                base_1.input.charCodeAt(base_1.state.pos) !== 92 /* backslash */) {
+                index_1.finishToken(2048 /* name */, 31 /* _unique */);
+                return;
+            }
+            break;
         case 118 /* lowercaseV */:
@@ -879,2 +900,5 @@ switch (base_1.input.charCodeAt(base_1.state.pos++)) {
         }
+        else if (ch === 64 /* atSign */ && base_1.input.charCodeAt(base_1.state.pos + 1) === 64 /* atSign */) {
+            base_1.state.pos += 2;
+        }
         else {
@@ -881,0 +905,0 @@ break;

package.json

 {
   "name": "sucrase",
-  "version": "1.13.0",
+  "version": "1.14.0",
   "description": "Super-fast alternative to Babel for when you can target modern JS runtimes",
@@ -25,4 +25,6 @@ "author": "Alan Pierce <[e-mail]>",
     "benchmark": "node ./build/benchmark/benchmark.js",
+    "benchmark-react": "node ./build/benchmark/benchmark-react.js",
     "lint": "eslint './src/**/*.ts' './test/**/*.ts' './sucrase-babylon/**/*.ts' './integrations/gulp-plugin/src/**/*.ts'",
     "profile": "node --inspect-brk ./build/benchmark/profile.js",
+    "profile-react": "node --inspect-brk ./build/benchmark/profile-react.js",
     "prepublish": "yarn run build",
@@ -48,6 +50,9 @@ "run-examples": "ts-node ./example-runner/example-runner.ts",
   "devDependencies": {
-    "@babel/cli": "7.0.0-beta.35",
-    "@babel/core": "7.0.0-beta.35",
+    "@babel/cli": "7.0.0-beta.39",
+    "@babel/core": "7.0.0-beta.39",
+    "@babel/plugin-proposal-class-properties": "^7.0.0-beta.39",
+    "@babel/plugin-proposal-object-rest-spread": "^7.0.0-beta.39",
     "@babel/plugin-transform-modules-commonjs": "^7.0.0-beta.35",
-    "@babel/preset-react": "7.0.0-beta.35",
+    "@babel/preset-flow": "^7.0.0-beta.39",
+    "@babel/preset-react": "7.0.0-beta.39",
     "@babel/preset-typescript": "^7.0.0-beta.36",
@@ -66,8 +71,8 @@ "@babel/register": "^7.0.0-beta.35",
     "mocha": "^3.5.3",
-    "prettier": "^1.9.2",
+    "prettier": "^1.12.1",
     "ts-node": "^4.0.2",
-    "tslint": "^5.8.0",
-    "tslint-language-service": "^0.9.7",
-    "typescript": "^2.6.2",
-    "typescript-eslint-parser": "^11.0.0"
+    "tslint": "^5.9.1",
+    "tslint-language-service": "^0.9.9",
+    "typescript": "^2.8.3",
+    "typescript-eslint-parser": "^15.0.0"
   },
@@ -80,3 +85,3 @@ "dependencies": {
     "pirates": "^3.0.2",
-    "tslib": "^1.7.1"
+    "tslib": "^1.9.0"
   },
@@ -83,0 +88,0 @@ "engines": {

README.md

@@ -6,4 +6,4 @@ # Sucrase
 [![MIT License](https://img.shields.io/npm/l/express.svg?maxAge=2592000)](LICENSE)
+[![Join the chat at https://gitter.im/sucrasejs](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/sucrasejs/Lobby)
 
-
 ### [Try it out](https://sucrase.io)
@@ -23,3 +23,3 @@
 
-Sucrase can convert the following codebases with all tests passing:
+Sucrase can build the following codebases with all tests passing:
 * Sucrase itself (6K lines of code excluding Babylon fork, typescript, imports).
@@ -44,3 +44,3 @@ * The [Benchling](https://benchling.com/) frontend codebase
 are four main transforms that you may want to enable:
-* **jsx**: Converts JSX syntax to `React.createElement`, e.g. `<div a={b} />`
+* **jsx**: Transforms JSX syntax to `React.createElement`, e.g. `<div a={b} />`
   becomes `React.createElement('div', {a: b})`. Behaves like Babel 7's
@@ -53,3 +53,3 @@ [babel-preset-react](https://github.com/babel/babel/tree/master/packages/babel-preset-react),
   to `const f = (x) => "hi";`. Does not check types.
-* **imports**: Converts ES Modules (`import`/`export`) to CommonJS
+* **imports**: Transforms ES Modules (`import`/`export`) to CommonJS
   (`require`/`module.exports`) using the same approach as Babel. With the
@@ -56,0 +56,0 @@ `typescript` transform enabled, the import conversion uses the behavior of the

No alert changes

Improved metrics

Total package byte prevSize

742984

increased by1.08%

Lines of code

18831

increased by1.03%

Worsened metrics

Dev dependency count

26

increased by13.04%

Dependency changes

• Updatedtslib@^1.9.0