mirror of
https://github.com/microsoft/TypeScript.git
synced 2026-02-05 08:11:30 -06:00
Move return checks to the grammar checker.
This commit is contained in:
Cyrus Najmabadi
parent
cd75243d83
commit
b9353086a4
@ -835,7 +835,6 @@ module ts {
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var lookAheadMode = LookAheadMode.NotLookingAhead;
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var inAmbientContext = false;
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var inFunctionBody = false;
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function getLineStarts(): number[] {
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return lineStarts || (lineStarts = computeLineStarts(sourceText));
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@ -2062,7 +2061,7 @@ module ts {
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var body: Node;
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if (token === SyntaxKind.OpenBraceToken) {
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body = parseBody(/* ignoreMissingOpenBrace */ false);
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body = parseFunctionBlock(/* ignoreMissingOpenBrace */ false);
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}
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else if (isStatement(/* inErrorRecovery */ true) && !isStartOfExpressionStatement() && token !== SyntaxKind.FunctionKeyword) {
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// Check if we got a plain statement (i.e. no expression-statements, no functions expressions/declarations)
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@ -2079,7 +2078,7 @@ module ts {
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// up preemptively closing the containing construct.
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//
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// Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
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body = parseBody(/* ignoreMissingOpenBrace */ true);
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body = parseFunctionBlock(/* ignoreMissingOpenBrace */ true);
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}
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else {
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body = parseAssignmentExpression(noIn);
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@ -2431,7 +2430,7 @@ module ts {
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node = <PropertyDeclaration>createNode(SyntaxKind.PropertyAssignment, nodePos);
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node.name = propertyName;
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var sig = parseSignature(SyntaxKind.CallSignature, SyntaxKind.ColonToken, /* returnTokenRequired */ false);
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var body = parseBody(/* ignoreMissingOpenBrace */ false);
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var body = parseFunctionBlock(/* ignoreMissingOpenBrace */ false);
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// do not propagate property name as name for function expression
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// for scenarios like
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// var x = 1;
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@ -2492,7 +2491,7 @@ module ts {
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parseExpected(SyntaxKind.FunctionKeyword);
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var name = isIdentifier() ? parseIdentifier() : undefined;
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var sig = parseSignature(SyntaxKind.CallSignature, SyntaxKind.ColonToken, /* returnTokenRequired */ false);
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var body = parseBody(/* ignoreMissingOpenBrace */ false);
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var body = parseFunctionBlock(/* ignoreMissingOpenBrace */ false);
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return makeFunctionExpression(SyntaxKind.FunctionExpression, pos, name, sig, body);
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}
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@ -2530,13 +2529,9 @@ module ts {
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return finishNode(node);
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}
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function parseBody(ignoreMissingOpenBrace: boolean): Block {
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var saveInFunctionBody = inFunctionBody;
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inFunctionBody = true;
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function parseFunctionBlock(ignoreMissingOpenBrace: boolean): Block {
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var block = parseBlock(ignoreMissingOpenBrace, /*checkForStrictMode*/ true);
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block.kind = SyntaxKind.FunctionBlock;
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inFunctionBody = saveInFunctionBody;
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return block;
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}
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@ -2660,18 +2655,15 @@ module ts {
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function parseReturnStatement(): ReturnStatement {
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var node = <ReturnStatement>createNode(SyntaxKind.ReturnStatement);
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var errorCountBeforeReturnStatement = file.parseDiagnostics.length;
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var returnTokenStart = scanner.getTokenPos();
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var returnTokenLength = scanner.getTextPos() - returnTokenStart;
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parseExpected(SyntaxKind.ReturnKeyword);
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if (!canParseSemicolon()) node.expression = parseExpression();
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parseSemicolon();
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// In an ambient context, we will already give an error for having a statement.
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if (!inFunctionBody && !inAmbientContext && errorCountBeforeReturnStatement === file.parseDiagnostics.length) {
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grammarErrorAtPos(returnTokenStart, returnTokenLength, Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
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if (!canParseSemicolon()) {
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node.expression = parseExpression();
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}
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parseSemicolon();
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return finishNode(node);
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}
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@ -2914,7 +2906,7 @@ module ts {
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function parseFunctionBlockOrSemicolon(): Block {
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if (token === SyntaxKind.OpenBraceToken) {
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return parseBody(/* ignoreMissingOpenBrace */ false);
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return parseFunctionBlock(/* ignoreMissingOpenBrace */ false);
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}
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if (canParseSemicolon()) {
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@ -3045,7 +3037,7 @@ module ts {
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node.body = <Block>createMissingNode();
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}
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else {
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node.body = parseBody(/* ignoreMissingOpenBrace */ false);
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node.body = parseFunctionBlock(/* ignoreMissingOpenBrace */ false);
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}
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return finishNode(node);
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@ -3293,7 +3285,6 @@ module ts {
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if (parseOptional(SyntaxKind.ImplementsKeyword)) {
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node.implementedTypes = parseDelimitedList(ParsingContext.BaseTypeReferences, parseTypeReference);
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}
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var errorCountBeforeClassBody = file.parseDiagnostics.length;
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if (parseExpected(SyntaxKind.OpenBraceToken)) {
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node.members = parseList(ParsingContext.ClassMembers, /*checkForStrictMode*/ false, parseClassMemberDeclaration);
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parseExpected(SyntaxKind.CloseBraceToken);
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@ -3700,6 +3691,7 @@ module ts {
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// We're automatically in an ambient context if this is a .d.ts file.
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var inAmbientContext = fileExtensionIs(file.filename, ".d.ts");
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var inFunctionBlock = false;
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var parent: Node;
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visitNode(file);
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@ -3709,6 +3701,11 @@ module ts {
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node.parent = parent;
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parent = node;
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var savedInFunctionBlock = inFunctionBlock;
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if (node.kind === SyntaxKind.FunctionBlock) {
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inFunctionBlock = true;
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}
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var savedInAmbientContext = inAmbientContext
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if (node.flags & NodeFlags.Ambient) {
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inAmbientContext = true;
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@ -3717,6 +3714,7 @@ module ts {
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checkNode(node);
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inAmbientContext = savedInAmbientContext;
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inFunctionBlock = savedInFunctionBlock;
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parent = savedParent;
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}
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@ -3724,7 +3722,7 @@ module ts {
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// First, check if you have a statement in a place where it is not allowed. We want
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// to do this before recursing, because we'd prefer to report these errors at the top
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// level instead of at some nested level.
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if (checkForStatementInAmbientContext(node)) {
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if (inAmbientContext && checkForStatementInAmbientContext(node)) {
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return;
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}
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@ -3772,6 +3770,7 @@ module ts {
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case SyntaxKind.PostfixOperator: return visitPostfixOperator(<UnaryExpression>node);
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case SyntaxKind.PrefixOperator: return visitPrefixOperator(<UnaryExpression>node);
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case SyntaxKind.PropertyAssignment: return visitPropertyAssignment(<PropertyDeclaration>node);
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case SyntaxKind.ReturnStatement: return visitReturnStatement(<ReturnStatement>node);
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case SyntaxKind.SetAccessor: return visitSetAccessor(<MethodDeclaration>node);
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case SyntaxKind.ShorthandPropertyAssignment: return visitShorthandPropertyAssignment(<ShortHandPropertyDeclaration>node);
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case SyntaxKind.SwitchStatement: return visitSwitchStatement(<SwitchStatement>node);
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@ -3814,27 +3813,25 @@ module ts {
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}
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function checkForStatementInAmbientContext(node: Node): boolean {
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if (inAmbientContext) {
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switch (node.kind) {
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case SyntaxKind.Block:
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case SyntaxKind.EmptyStatement:
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case SyntaxKind.IfStatement:
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case SyntaxKind.DoStatement:
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case SyntaxKind.WhileStatement:
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case SyntaxKind.ForStatement:
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case SyntaxKind.ForInStatement:
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case SyntaxKind.ContinueStatement:
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case SyntaxKind.BreakStatement:
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case SyntaxKind.ReturnStatement:
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case SyntaxKind.WithStatement:
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case SyntaxKind.SwitchStatement:
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case SyntaxKind.ThrowStatement:
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case SyntaxKind.TryStatement:
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case SyntaxKind.DebuggerStatement:
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case SyntaxKind.LabeledStatement:
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case SyntaxKind.ExpressionStatement:
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return grammarErrorOnFirstToken(node, Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
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}
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switch (node.kind) {
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case SyntaxKind.Block:
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case SyntaxKind.EmptyStatement:
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case SyntaxKind.IfStatement:
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case SyntaxKind.DoStatement:
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case SyntaxKind.WhileStatement:
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case SyntaxKind.ForStatement:
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case SyntaxKind.ForInStatement:
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case SyntaxKind.ContinueStatement:
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case SyntaxKind.BreakStatement:
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case SyntaxKind.ReturnStatement:
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case SyntaxKind.WithStatement:
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case SyntaxKind.SwitchStatement:
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case SyntaxKind.ThrowStatement:
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case SyntaxKind.TryStatement:
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case SyntaxKind.DebuggerStatement:
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case SyntaxKind.LabeledStatement:
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case SyntaxKind.ExpressionStatement:
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return grammarErrorOnFirstToken(node, Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
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}
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}
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@ -4362,6 +4359,12 @@ module ts {
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}
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}
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function visitReturnStatement(node: ReturnStatement) {
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if (!inFunctionBlock) {
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grammarErrorOnFirstToken(node, Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
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}
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}
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function visitSetAccessor(node: MethodDeclaration) {
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checkTypeParameterList(node.typeParameters) ||
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checkParameterList(node.parameters) ||
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@ -7,14 +7,11 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(28,30): error TS
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(28,33): error TS1138: Parameter declaration expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(28,34): error TS1005: ';' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(28,36): error TS1068: Unexpected token. A constructor, method, accessor, or property was expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(30,21): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(31,18): error TS1129: Statement expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(38,17): error TS1109: Expression expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(40,41): error TS1005: ';' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(40,45): error TS1002: Unterminated string literal.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(43,21): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(46,13): error TS1005: 'try' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(55,13): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(58,5): error TS1128: Declaration or statement expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(69,13): error TS1109: Expression expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(72,37): error TS1127: Invalid character.
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@ -35,10 +32,8 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(234,14): error T
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(235,9): error TS1128: Declaration or statement expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(235,27): error TS1005: ',' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(235,36): error TS1005: ';' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(236,13): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(238,9): error TS1128: Declaration or statement expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(238,26): error TS1005: ';' expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(239,13): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(241,5): error TS1128: Declaration or statement expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(254,69): error TS1110: Type expected.
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(256,9): error TS1128: Declaration or statement expected.
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@ -93,7 +88,7 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,29): error T
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tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error TS2304: Cannot find name 'string'.
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==== tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts (93 errors) ====
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==== tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts (88 errors) ====
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declare module "fs" {
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export class File {
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constructor(filename: string);
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@ -153,8 +148,6 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error T
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!!! error TS2391: Function implementation is missing or not immediately following the declaration.
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return 1;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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^
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~
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!!! error TS1129: Statement expected.
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@ -188,8 +181,6 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error T
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!!! error TS2304: Cannot find name 'retValue'.
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return 1;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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}
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catch (e) {
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@ -208,8 +199,6 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error T
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!!! error TS2304: Cannot find name 'console'.
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return 0;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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}
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@ -453,8 +442,6 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error T
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~~~~~~
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!!! error TS2304: Cannot find name 'number'.
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return val;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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public method2() {
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~~~~~~
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@ -464,8 +451,6 @@ tests/cases/compiler/constructorWithIncompleteTypeAnnotation.ts(259,37): error T
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~~~~~~~
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!!! error TS2304: Cannot find name 'method2'.
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return 2 * this.method1(2);
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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}
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~
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@ -1,11 +1,10 @@
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tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts(13,13): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts(13,13): error TS1131: Property or signature expected.
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tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts(14,9): error TS1128: Declaration or statement expected.
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tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts(15,5): error TS1128: Declaration or statement expected.
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tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts(11,5): error TS2411: Property 'a' of type '{ toString: () => {}; }' is not assignable to string index type 'Object'.
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==== tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts (5 errors) ====
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==== tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtendingClass2.ts (4 errors) ====
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class Foo {
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x: string;
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y() { }
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@ -23,8 +22,6 @@ tests/cases/conformance/interfaces/interfacesExtendingClasses/interfaceExtending
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!!! error TS2411: Property 'a' of type '{ toString: () => {}; }' is not assignable to string index type 'Object'.
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return 1;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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~~~~~~
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!!! error TS1131: Property or signature expected.
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};
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~
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@ -1,13 +1,10 @@
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tests/cases/compiler/overloadOnConstAsTypeAnnotation.ts(1,37): error TS1005: ';' expected.
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tests/cases/compiler/overloadOnConstAsTypeAnnotation.ts(1,42): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/overloadOnConstAsTypeAnnotation.ts(1,8): error TS2382: Specialized overload signature is not assignable to any non-specialized signature.
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==== tests/cases/compiler/overloadOnConstAsTypeAnnotation.ts (3 errors) ====
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==== tests/cases/compiler/overloadOnConstAsTypeAnnotation.ts (2 errors) ====
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var f: (x: 'hi') => number = ('hi') => { return 1; };
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~~
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!!! error TS1005: ';' expected.
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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~~~~~~~~~~~~~~~~~~~
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!!! error TS2382: Specialized overload signature is not assignable to any non-specialized signature.
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@ -1,19 +1,13 @@
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts(1,1): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts(2,1): error TS1128: Declaration or statement expected.
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts(3,1): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts(4,1): error TS1128: Declaration or statement expected.
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==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts (4 errors) ====
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==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ModuleElements/parserErrorRecovery_ModuleElement1.ts (2 errors) ====
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return foo;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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~
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!!! error TS1128: Declaration or statement expected.
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return bar;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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}
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~
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!!! error TS1128: Declaration or statement expected.
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@ -1,8 +1,11 @@
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/VariableLists/parserErrorRecovery_VariableList1.ts(1,6): error TS1009: Trailing comma not allowed.
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tests/cases/conformance/parser/ecmascript5/ErrorRecovery/VariableLists/parserErrorRecovery_VariableList1.ts(2,1): error TS1108: A 'return' statement can only be used within a function body.
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==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/VariableLists/parserErrorRecovery_VariableList1.ts (1 errors) ====
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==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/VariableLists/parserErrorRecovery_VariableList1.ts (2 errors) ====
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var a,
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~
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!!! error TS1009: Trailing comma not allowed.
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return;
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~~~~~~
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!!! error TS1108: A 'return' statement can only be used within a function body.
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@ -2,14 +2,13 @@ tests/cases/compiler/propertyWrappedInTry.ts(3,5): error TS1068: Unexpected toke
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tests/cases/compiler/propertyWrappedInTry.ts(5,9): error TS1129: Statement expected.
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tests/cases/compiler/propertyWrappedInTry.ts(11,5): error TS1128: Declaration or statement expected.
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tests/cases/compiler/propertyWrappedInTry.ts(11,18): error TS1005: ';' expected.
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tests/cases/compiler/propertyWrappedInTry.ts(13,9): error TS1108: A 'return' statement can only be used within a function body.
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tests/cases/compiler/propertyWrappedInTry.ts(17,1): error TS1128: Declaration or statement expected.
|
||||
tests/cases/compiler/propertyWrappedInTry.ts(5,16): error TS2304: Cannot find name 'bar'.
|
||||
tests/cases/compiler/propertyWrappedInTry.ts(5,22): error TS2304: Cannot find name 'someInitThatMightFail'.
|
||||
tests/cases/compiler/propertyWrappedInTry.ts(11,12): error TS2304: Cannot find name 'baz'.
|
||||
|
||||
|
||||
==== tests/cases/compiler/propertyWrappedInTry.ts (9 errors) ====
|
||||
==== tests/cases/compiler/propertyWrappedInTry.ts (8 errors) ====
|
||||
class Foo {
|
||||
|
||||
try {
|
||||
@ -37,8 +36,6 @@ tests/cases/compiler/propertyWrappedInTry.ts(11,12): error TS2304: Cannot find n
|
||||
!!! error TS2304: Cannot find name 'baz'.
|
||||
|
||||
return this.bar; // doesn't get rewritten to Foo.bar.
|
||||
~~~~~~
|
||||
!!! error TS1108: A 'return' statement can only be used within a function body.
|
||||
|
||||
}
|
||||
|
||||
|
||||
@ -1,7 +1,9 @@
|
||||
tests/cases/compiler/switchStatementsWithMultipleDefaults.ts(9,5): error TS1113: A 'default' clause cannot appear more than once in a 'switch' statement.
|
||||
tests/cases/compiler/switchStatementsWithMultipleDefaults.ts(10,5): error TS1113: A 'default' clause cannot appear more than once in a 'switch' statement.
|
||||
tests/cases/compiler/switchStatementsWithMultipleDefaults.ts(28,22): error TS1108: A 'return' statement can only be used within a function body.
|
||||
|
||||
|
||||
==== tests/cases/compiler/switchStatementsWithMultipleDefaults.ts (1 errors) ====
|
||||
==== tests/cases/compiler/switchStatementsWithMultipleDefaults.ts (3 errors) ====
|
||||
|
||||
var x = 10;
|
||||
|
||||
@ -11,7 +13,11 @@ tests/cases/compiler/switchStatementsWithMultipleDefaults.ts(28,22): error TS110
|
||||
default: // No issues.
|
||||
break;
|
||||
default: // Error; second 'default' clause.
|
||||
~~~~~~~~
|
||||
!!! error TS1113: A 'default' clause cannot appear more than once in a 'switch' statement.
|
||||
default: // Error; third 'default' clause.
|
||||
~~~~~~~~
|
||||
!!! error TS1113: A 'default' clause cannot appear more than once in a 'switch' statement.
|
||||
case 3:
|
||||
x *= x;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user