Refactoring emitter for emit ES6 features natively
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4 changed files with 42 additions and 32 deletions
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@ -8881,7 +8881,7 @@ module ts {
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// This is necessary as an identifier in short-hand property assignment can contains two meaning:
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// property name and property value.
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if (location && location.kind === SyntaxKind.ShorthandPropertyAssignment) {
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return resolveEntityName(location, (<ShortHandPropertyDeclaration>location).name, SymbolFlags.Value);
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return resolveEntityName(location, (<ShorthandPropertyDeclaration>location).name, SymbolFlags.Value);
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}
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return undefined;
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}
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@ -2197,33 +2197,28 @@ module ts {
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emitTrailingComments(node);
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}
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function emitShortHandPropertyAssignment(node: ShortHandPropertyDeclaration) {
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function emitAsNormalPropertyAssignment() {
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emitLeadingComments(node);
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// Emit identifier as an identifier
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emit(node.name);
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write(": ");
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// Even though this is stored as identified because it is in short-hand property assignment,
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// treated it as expression
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emitExpressionIdentifier(node.name);
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emitTrailingComments(node);
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}
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function emitShorthandPropertyAssignmentAsNormalPropertyAssignment(node: ShorthandPropertyDeclaration) {
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emitLeadingComments(node);
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// Emit identifier as an identifier
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emit(node.name);
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write(": ");
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// Even though this is stored as identified because it is in short-hand property assignment,
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// treated it as expression
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emitExpressionIdentifier(node.name);
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emitTrailingComments(node);
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}
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if (compilerOptions.target < ScriptTarget.ES6) {
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emitAsNormalPropertyAssignment();
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function emitShorthandPropertyAssignment(node: ShorthandPropertyDeclaration) {
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// If short-hand property has a prefix, then regardless of the target version, we will emit it as normal property assignment
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var prefix = resolver.getExpressionNamePrefix(node.name);
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if (prefix) {
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emitShorthandPropertyAssignmentAsNormalPropertyAssignment(node);
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}
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else if (compilerOptions.target >= ScriptTarget.ES6) {
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// If short-hand property has a prefix, then regardless of the target version, we will emit it as normal property assignment
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var prefix = resolver.getExpressionNamePrefix(node.name);
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if (prefix) {
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emitAsNormalPropertyAssignment();
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}
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// If short-hand property has no prefix, emit it as short-hand.
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else {
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emitLeadingComments(node);
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emit(node.name);
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emitTrailingComments(node);
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}
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// If short-hand property has no prefix, emit it as short-hand.
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else {
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emitLeadingComments(node);
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emit(node.name);
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emitTrailingComments(node);
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}
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}
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@ -3413,6 +3408,7 @@ module ts {
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return emitPinnedOrTripleSlashComments(node);
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}
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// Check if node has SyntaxKind which can be emitted the same in both version of ES5 and ES6
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switch (node.kind) {
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case SyntaxKind.Identifier:
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return emitIdentifier(<Identifier>node);
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@ -3451,8 +3447,6 @@ module ts {
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return emitObjectLiteral(<ObjectLiteral>node);
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case SyntaxKind.PropertyAssignment:
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return emitPropertyAssignment(<PropertyDeclaration>node);
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case SyntaxKind.ShorthandPropertyAssignment:
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return emitShortHandPropertyAssignment(<ShortHandPropertyDeclaration>node);
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case SyntaxKind.PropertyAccess:
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return emitPropertyAccess(<PropertyAccess>node);
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case SyntaxKind.IndexedAccess:
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@ -3539,6 +3533,22 @@ module ts {
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case SyntaxKind.SourceFile:
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return emitSourceFile(<SourceFile>node);
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}
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// Emit node which needs to be emitted differently between ES5 and ES6
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if (compilerOptions.target < ScriptTarget.ES6) {
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// Emit node down-leveling
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switch (node.kind) {
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case SyntaxKind.ShorthandPropertyAssignment:
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return emitShorthandPropertyAssignmentAsNormalPropertyAssignment(<ShorthandPropertyDeclaration>node);
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}
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}
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else if (compilerOptions.target >= ScriptTarget.ES6) {
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// Emit node natively in EcmaScript6
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switch (node.kind) {
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case SyntaxKind.ShorthandPropertyAssignment:
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return emitShorthandPropertyAssignment(<ShorthandPropertyDeclaration>node);
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}
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}
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}
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function hasDetachedComments(pos: number) {
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@ -2764,7 +2764,7 @@ module ts {
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// Parse to check if it is short-hand property assignment or normal property assignment
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if ((token === SyntaxKind.CommaToken || token === SyntaxKind.CloseBraceToken) && tokenIsIdentifier) {
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node = <ShortHandPropertyDeclaration>createNode(SyntaxKind.ShorthandPropertyAssignment, nodePos);
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node = <ShorthandPropertyDeclaration>createNode(SyntaxKind.ShorthandPropertyAssignment, nodePos);
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node.name = propertyName;
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}
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else {
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@ -3968,7 +3968,7 @@ module ts {
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case SyntaxKind.ReturnStatement: return checkReturnStatement(<ReturnStatement>node);
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case SyntaxKind.SetAccessor: return checkSetAccessor(<MethodDeclaration>node);
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case SyntaxKind.SourceFile: return checkSourceFile(<SourceFile>node);
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case SyntaxKind.ShorthandPropertyAssignment: return checkShorthandPropertyAssignment(<ShortHandPropertyDeclaration>node);
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case SyntaxKind.ShorthandPropertyAssignment: return checkShorthandPropertyAssignment(<ShorthandPropertyDeclaration>node);
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case SyntaxKind.SwitchStatement: return checkSwitchStatement(<SwitchStatement>node);
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case SyntaxKind.TaggedTemplateExpression: return checkTaggedTemplateExpression(<TaggedTemplateExpression>node);
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case SyntaxKind.TupleType: return checkTupleType(<TupleTypeNode>node);
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@ -4832,7 +4832,7 @@ module ts {
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return grammarErrorOnFirstToken(node, Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
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}
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function checkShorthandPropertyAssignment(node: ShortHandPropertyDeclaration): boolean {
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function checkShorthandPropertyAssignment(node: ShorthandPropertyDeclaration): boolean {
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return checkForInvalidQuestionMark(node, Diagnostics.An_object_member_cannot_be_declared_optional);
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}
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@ -360,7 +360,7 @@ module ts {
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initializer?: Expression;
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}
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export interface ShortHandPropertyDeclaration extends Declaration {
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export interface ShorthandPropertyDeclaration extends Declaration {
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name: Identifier;
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}
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