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Cherry-pick 79f1ec32bd

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From #38719
This commit is contained in:
Nathan Shively-Sanders
2020-05-21 16:53:16 -07:00
parent c019c83547
commit 4ac4d9a940
75 changed files with 1066 additions and 1315 deletions
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12
src/compiler/transformers/ts.ts
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@@ -23,10 +23,11 @@ namespace ts {
IsNamedExternalExport = 1 << 4,
IsDefaultExternalExport = 1 << 5,
IsDerivedClass = 1 << 6,
UseImmediatelyInvokedFunctionExpression = 1 << 7,
HasAnyDecorators = HasConstructorDecorators | HasMemberDecorators,
NeedsName = HasStaticInitializedProperties | HasMemberDecorators,
UseImmediatelyInvokedFunctionExpression = HasAnyDecorators | HasStaticInitializedProperties,
MayNeedImmediatelyInvokedFunctionExpression = HasAnyDecorators | HasStaticInitializedProperties,
IsExported = IsExportOfNamespace | IsDefaultExternalExport | IsNamedExternalExport,
}
@@ -595,6 +596,7 @@ namespace ts {
if (isExportOfNamespace(node)) facts |= ClassFacts.IsExportOfNamespace;
else if (isDefaultExternalModuleExport(node)) facts |= ClassFacts.IsDefaultExternalExport;
else if (isNamedExternalModuleExport(node)) facts |= ClassFacts.IsNamedExternalExport;
if (languageVersion <= ScriptTarget.ES5 && (facts & ClassFacts.MayNeedImmediatelyInvokedFunctionExpression)) facts |= ClassFacts.UseImmediatelyInvokedFunctionExpression;
return facts;
}
@@ -665,12 +667,6 @@ namespace ts {
const iife = createImmediatelyInvokedArrowFunction(statements);
setEmitFlags(iife, EmitFlags.TypeScriptClassWrapper);
// Class comment is already added by the ES2015 transform when targeting ES5 or below.
// Only add if targetting ES2015+ to prevent duplicates
if (languageVersion > ScriptTarget.ES5) {
addSyntheticLeadingComment(iife, SyntaxKind.MultiLineCommentTrivia, "* @class ");
}
const varStatement = createVariableStatement(
/*modifiers*/ undefined,
createVariableDeclarationList([
@@ -679,7 +675,7 @@ namespace ts {
/*type*/ undefined,
iife
)
], languageVersion > ScriptTarget.ES5 ? NodeFlags.Let : undefined)
])
);
setOriginalNode(varStatement, node);