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Copy pathast.ts
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1632 lines (1535 loc) · 43.2 KB
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/**
* Abstract Syntax Tree extras.
*
* Not needed in a standalone compiler but useful for testing the parser.
*
* @module extra/ast
*//***/
import {
Node,
NodeKind,
Source,
ArrowKind,
TypeNode,
NamedTypeNode,
FunctionTypeNode,
TypeName,
TypeParameterNode,
Expression,
IdentifierExpression,
LiteralExpression,
LiteralKind,
FloatLiteralExpression,
IntegerLiteralExpression,
StringLiteralExpression,
RegexpLiteralExpression,
ArrayLiteralExpression,
AssertionExpression,
AssertionKind,
BinaryExpression,
CallExpression,
CommaExpression,
ElementAccessExpression,
FunctionExpression,
NewExpression,
ParenthesizedExpression,
PropertyAccessExpression,
TernaryExpression,
UnaryPostfixExpression,
UnaryExpression,
UnaryPrefixExpression,
ClassExpression,
ObjectLiteralExpression,
Statement,
BlockStatement,
BreakStatement,
ContinueStatement,
DoStatement,
EmptyStatement,
ExportImportStatement,
ExportStatement,
ExportDefaultStatement,
ExpressionStatement,
ForStatement,
IfStatement,
ImportStatement,
InstanceOfExpression,
ReturnStatement,
SwitchStatement,
ThrowStatement,
TryStatement,
VariableStatement,
WhileStatement,
ClassDeclaration,
EnumDeclaration,
EnumValueDeclaration,
FieldDeclaration,
FunctionDeclaration,
ImportDeclaration,
IndexSignatureDeclaration,
InterfaceDeclaration,
MethodDeclaration,
NamespaceDeclaration,
TypeDeclaration,
VariableDeclaration,
DecoratorNode,
ParameterNode,
ParameterKind,
ExportMember,
SwitchCase,
DeclarationStatement,
isTypeOmitted
} from "../ast";
import {
operatorTokenToString
} from "../tokenizer";
import {
CharCode,
indent
} from "../util";
import {
CommonFlags
} from "../common";
/** An AST builder. */
export class ASTBuilder {
/** Rebuilds the textual source from the specified AST, as far as possible. */
static build(node: Node): string {
var builder = new ASTBuilder();
builder.visitNode(node);
return builder.finish();
}
private sb: string[] = [];
private indentLevel: i32 = 0;
visitNode(node: Node): void {
switch (node.kind) {
case NodeKind.SOURCE: {
this.visitSource(<Source>node);
break;
}
// types
case NodeKind.NAMEDTYPE: {
this.visitNamedTypeNode(<NamedTypeNode>node);
break;
}
case NodeKind.FUNCTIONTYPE: {
this.visitFunctionTypeNode(<FunctionTypeNode>node);
break;
}
case NodeKind.TYPEPARAMETER: {
this.visitTypeParameter(<TypeParameterNode>node);
break;
}
// expressions
case NodeKind.FALSE:
case NodeKind.NULL:
case NodeKind.SUPER:
case NodeKind.THIS:
case NodeKind.TRUE:
case NodeKind.CONSTRUCTOR:
case NodeKind.IDENTIFIER: {
this.visitIdentifierExpression(<IdentifierExpression>node);
break;
}
case NodeKind.ASSERTION: {
this.visitAssertionExpression(<AssertionExpression>node);
break;
}
case NodeKind.BINARY: {
this.visitBinaryExpression(<BinaryExpression>node);
break;
}
case NodeKind.CALL: {
this.visitCallExpression(<CallExpression>node);
break;
}
case NodeKind.CLASS: {
this.visitClassExpression(<ClassExpression>node);
break;
}
case NodeKind.COMMA: {
this.visitCommaExpression(<CommaExpression>node);
break;
}
case NodeKind.ELEMENTACCESS: {
this.visitElementAccessExpression(<ElementAccessExpression>node);
break;
}
case NodeKind.FUNCTION: {
this.visitFunctionExpression(<FunctionExpression>node);
break;
}
case NodeKind.INSTANCEOF: {
this.visitInstanceOfExpression(<InstanceOfExpression>node);
break;
}
case NodeKind.LITERAL: {
this.visitLiteralExpression(<LiteralExpression>node);
break;
}
case NodeKind.NEW: {
this.visitNewExpression(<NewExpression>node);
break;
}
case NodeKind.PARENTHESIZED: {
this.visitParenthesizedExpression(<ParenthesizedExpression>node);
break;
}
case NodeKind.PROPERTYACCESS: {
this.visitPropertyAccessExpression(<PropertyAccessExpression>node);
break;
}
case NodeKind.TERNARY: {
this.visitTernaryExpression(<TernaryExpression>node);
break;
}
case NodeKind.UNARYPOSTFIX: {
this.visitUnaryPostfixExpression(<UnaryPostfixExpression>node);
break;
}
case NodeKind.UNARYPREFIX: {
this.visitUnaryPrefixExpression(<UnaryPrefixExpression>node);
break;
}
// statements
case NodeKind.BLOCK: {
this.visitBlockStatement(<BlockStatement>node);
break;
}
case NodeKind.BREAK: {
this.visitBreakStatement(<BreakStatement>node);
break;
}
case NodeKind.CONTINUE: {
this.visitContinueStatement(<ContinueStatement>node);
break;
}
case NodeKind.DO: {
this.visitDoStatement(<DoStatement>node);
break;
}
case NodeKind.EMPTY: {
this.visitEmptyStatement(<EmptyStatement>node);
break;
}
case NodeKind.EXPORT: {
this.visitExportStatement(<ExportStatement>node);
break;
}
case NodeKind.EXPORTDEFAULT: {
this.visitExportDefaultStatement(<ExportDefaultStatement>node);
break;
}
case NodeKind.EXPORTIMPORT: {
this.visitExportImportStatement(<ExportImportStatement>node);
break;
}
case NodeKind.EXPRESSION: {
this.visitExpressionStatement(<ExpressionStatement>node);
break;
}
case NodeKind.FOR: {
this.visitForStatement(<ForStatement>node);
break;
}
case NodeKind.IF: {
this.visitIfStatement(<IfStatement>node);
break;
}
case NodeKind.IMPORT: {
this.visitImportStatement(<ImportStatement>node);
break;
}
case NodeKind.RETURN: {
this.visitReturnStatement(<ReturnStatement>node);
break;
}
case NodeKind.SWITCH: {
this.visitSwitchStatement(<SwitchStatement>node);
break;
}
case NodeKind.THROW: {
this.visitThrowStatement(<ThrowStatement>node);
break;
}
case NodeKind.TRY: {
this.visitTryStatement(<TryStatement>node);
break;
}
case NodeKind.VARIABLE: {
this.visitVariableStatement(<VariableStatement>node);
break;
}
case NodeKind.WHILE: {
this.visitWhileStatement(<WhileStatement>node);
break;
}
// declaration statements
case NodeKind.CLASSDECLARATION: {
this.visitClassDeclaration(<ClassDeclaration>node);
break;
}
case NodeKind.ENUMDECLARATION: {
this.visitEnumDeclaration(<EnumDeclaration>node);
break;
}
case NodeKind.ENUMVALUEDECLARATION: {
this.visitEnumValueDeclaration(<EnumValueDeclaration>node);
break;
}
case NodeKind.FIELDDECLARATION: {
this.visitFieldDeclaration(<FieldDeclaration>node);
break;
}
case NodeKind.FUNCTIONDECLARATION: {
this.visitFunctionDeclaration(<FunctionDeclaration>node);
break;
}
case NodeKind.IMPORTDECLARATION: {
this.visitImportDeclaration(<ImportDeclaration>node);
break;
}
case NodeKind.INDEXSIGNATUREDECLARATION: {
this.visitIndexSignatureDeclaration(<IndexSignatureDeclaration>node);
break;
}
case NodeKind.INTERFACEDECLARATION: {
this.visitInterfaceDeclaration(<InterfaceDeclaration>node);
break;
}
case NodeKind.METHODDECLARATION: {
this.visitMethodDeclaration(<MethodDeclaration>node);
break;
}
case NodeKind.NAMESPACEDECLARATION: {
this.visitNamespaceDeclaration(<NamespaceDeclaration>node);
break;
}
case NodeKind.TYPEDECLARATION: {
this.visitTypeDeclaration(<TypeDeclaration>node);
break;
}
case NodeKind.VARIABLEDECLARATION: {
this.visitVariableDeclaration(<VariableDeclaration>node);
break;
}
// other
case NodeKind.DECORATOR: {
this.serializeDecorator(<DecoratorNode>node);
break;
}
case NodeKind.EXPORTMEMBER: {
this.visitExportMember(<ExportMember>node);
break;
}
case NodeKind.PARAMETER: {
this.serializeParameter(<ParameterNode>node);
break;
}
case NodeKind.SWITCHCASE: {
this.visitSwitchCase(<SwitchCase>node);
break;
}
default: assert(false);
}
}
visitSource(source: Source): void {
var statements = source.statements;
for (let i = 0, k = statements.length; i < k; ++i) {
this.visitNodeAndTerminate(statements[i]);
}
}
// types
visitTypeNode(node: TypeNode): void {
switch (node.kind) {
case NodeKind.NAMEDTYPE: {
this.visitNamedTypeNode(<NamedTypeNode>node);
break;
}
case NodeKind.FUNCTIONTYPE: {
this.visitFunctionTypeNode(<FunctionTypeNode>node);
break;
}
default: assert(false);
}
}
visitTypeName(node: TypeName): void {
this.visitIdentifierExpression(node.identifier);
var sb = this.sb;
var current = node.next;
while (current) {
sb.push(".");
this.visitIdentifierExpression(current.identifier);
current = current.next;
}
}
visitNamedTypeNode(node: NamedTypeNode): void {
this.visitTypeName(node.name);
var typeArguments = node.typeArguments;
if (typeArguments) {
let numTypeArguments = typeArguments.length;
let sb = this.sb;
if (numTypeArguments) {
sb.push("<");
this.visitTypeNode(typeArguments[0]);
for (let i = 1; i < numTypeArguments; ++i) {
sb.push(", ");
this.visitTypeNode(typeArguments[i]);
}
sb.push(">");
}
if (node.isNullable) sb.push(" | null");
}
}
visitFunctionTypeNode(node: FunctionTypeNode): void {
var isNullable = node.isNullable;
var sb = this.sb;
sb.push(isNullable ? "((" : "(");
var explicitThisType = node.explicitThisType;
if (explicitThisType) {
sb.push("this: ");
this.visitTypeNode(explicitThisType);
}
var parameters = node.parameters;
var numParameters = parameters.length;
if (numParameters) {
if (explicitThisType) sb.push(", ");
this.serializeParameter(parameters[0]);
for (let i = 1; i < numParameters; ++i) {
sb.push(", ");
this.serializeParameter(parameters[i]);
}
}
var returnType = node.returnType;
if (returnType) {
sb.push(") => ");
this.visitTypeNode(returnType);
} else {
sb.push(") => void");
}
if (isNullable) sb.push(") | null");
}
visitTypeParameter(node: TypeParameterNode): void {
this.visitIdentifierExpression(node.name);
var extendsType = node.extendsType;
if (extendsType) {
this.sb.push(" extends ");
this.visitTypeNode(extendsType);
}
var defaultType = node.defaultType;
if (defaultType) {
this.sb.push("=");
this.visitTypeNode(defaultType);
}
}
// expressions
visitIdentifierExpression(node: IdentifierExpression): void {
if (node.isQuoted) this.visitStringLiteral(node.text);
else this.sb.push(node.text);
}
visitArrayLiteralExpression(node: ArrayLiteralExpression): void {
var sb = this.sb;
sb.push("[");
var elements = node.elementExpressions;
var numElements = elements.length;
if (numElements) {
if (elements[0]) this.visitNode(<Expression>elements[0]);
for (let i = 1; i < numElements; ++i) {
sb.push(", ");
if (elements[i]) this.visitNode(<Expression>elements[i]);
}
}
sb.push("]");
}
visitObjectLiteralExpression(node: ObjectLiteralExpression): void {
var sb = this.sb;
var names = node.names;
var values = node.values;
var numElements = names.length;
assert(numElements == values.length);
if (numElements) {
sb.push("{\n");
indent(sb, ++this.indentLevel);
this.visitNode(names[0]);
sb.push(": ");
this.visitNode(values[0]);
for (let i = 1; i < numElements; ++i) {
sb.push(",\n");
indent(sb, this.indentLevel);
let name = names[i];
let value = values[i];
if (name === value) {
this.visitNode(name);
} else {
this.visitNode(name);
sb.push(": ");
this.visitNode(value);
}
}
sb.push("\n");
indent(sb, --this.indentLevel);
sb.push("}");
} else {
sb.push("{}");
}
}
visitAssertionExpression(node: AssertionExpression): void {
var sb = this.sb;
switch (node.assertionKind) {
case AssertionKind.PREFIX: {
sb.push("<");
this.visitTypeNode(assert(node.toType));
sb.push(">");
this.visitNode(node.expression);
break;
}
case AssertionKind.AS: {
this.visitNode(node.expression);
sb.push(" as ");
this.visitTypeNode(assert(node.toType));
break;
}
case AssertionKind.NONNULL: {
this.visitNode(node.expression);
sb.push("!");
break;
}
default: assert(false);
}
}
visitBinaryExpression(node: BinaryExpression): void {
var sb = this.sb;
this.visitNode(node.left);
sb.push(" ");
sb.push(operatorTokenToString(node.operator));
sb.push(" ");
this.visitNode(node.right);
}
visitCallExpression(node: CallExpression): void {
var sb = this.sb;
this.visitNode(node.expression);
var typeArguments = node.typeArguments;
if (typeArguments) {
let numTypeArguments = typeArguments.length;
if (numTypeArguments) {
sb.push("<");
this.visitTypeNode(typeArguments[0]);
for (let i = 1; i < numTypeArguments; ++i) {
sb.push(", ");
this.visitTypeNode(typeArguments[i]);
}
sb.push(">(");
}
} else {
sb.push("(");
}
var args = node.arguments;
var numArgs = args.length;
if (numArgs) {
this.visitNode(args[0]);
for (let i = 1; i < numArgs; ++i) {
sb.push(", ");
this.visitNode(args[i]);
}
}
sb.push(")");
}
visitClassExpression(node: ClassExpression): void {
var declaration = node.declaration;
this.visitClassDeclaration(declaration);
}
visitCommaExpression(node: CommaExpression): void {
var expressions = node.expressions;
var numExpressions = assert(expressions.length);
this.visitNode(expressions[0]);
var sb = this.sb;
for (let i = 1; i < numExpressions; ++i) {
sb.push(",");
this.visitNode(expressions[i]);
}
}
visitElementAccessExpression(node: ElementAccessExpression): void {
var sb = this.sb;
this.visitNode(node.expression);
sb.push("[");
this.visitNode(node.elementExpression);
sb.push("]");
}
visitFunctionExpression(node: FunctionExpression): void {
var declaration = node.declaration;
if (!declaration.arrowKind) {
if (declaration.name.text.length) {
this.sb.push("function ");
} else {
this.sb.push("function");
}
} else {
assert(declaration.name.text.length == 0);
}
this.visitFunctionCommon(declaration);
}
visitLiteralExpression(node: LiteralExpression): void {
switch (node.literalKind) {
case LiteralKind.FLOAT: {
this.visitFloatLiteralExpression(<FloatLiteralExpression>node);
break;
}
case LiteralKind.INTEGER: {
this.visitIntegerLiteralExpression(<IntegerLiteralExpression>node);
break;
}
case LiteralKind.STRING: {
this.visitStringLiteralExpression(<StringLiteralExpression>node);
break;
}
case LiteralKind.REGEXP: {
this.visitRegexpLiteralExpression(<RegexpLiteralExpression>node);
break;
}
case LiteralKind.ARRAY: {
this.visitArrayLiteralExpression(<ArrayLiteralExpression>node);
break;
}
case LiteralKind.OBJECT: {
this.visitObjectLiteralExpression(<ObjectLiteralExpression>node);
break;
}
default: {
assert(false);
break;
}
}
}
visitFloatLiteralExpression(node: FloatLiteralExpression): void {
this.sb.push(node.value.toString(10));
}
visitInstanceOfExpression(node: InstanceOfExpression): void {
this.visitNode(node.expression);
this.sb.push(" instanceof ");
this.visitTypeNode(node.isType);
}
visitIntegerLiteralExpression(node: IntegerLiteralExpression): void {
this.sb.push(i64_to_string(node.value));
}
visitStringLiteral(str: string, singleQuoted: bool = false): void {
var sb = this.sb;
var off = 0;
var quote = singleQuoted ? "'" : "\"";
sb.push(quote);
var i = 0;
for (let k = str.length; i < k;) {
switch (str.charCodeAt(i)) {
case CharCode.NULL: {
if (i > off) sb.push(str.substring(off, off = i + 1));
sb.push("\\0");
off = ++i;
break;
}
case CharCode.BACKSPACE: {
if (i > off) sb.push(str.substring(off, i));
off = ++i;
sb.push("\\b");
break;
}
case CharCode.TAB: {
if (i > off) sb.push(str.substring(off, i));
off = ++i;
sb.push("\\t");
break;
}
case CharCode.LINEFEED: {
if (i > off) sb.push(str.substring(off, i));
off = ++i;
sb.push("\\n");
break;
}
case CharCode.VERTICALTAB: {
if (i > off) sb.push(str.substring(off, i));
off = ++i;
sb.push("\\v");
break;
}
case CharCode.FORMFEED: {
if (i > off) sb.push(str.substring(off, i));
off = ++i;
sb.push("\\f");
break;
}
case CharCode.CARRIAGERETURN: {
if (i > off) sb.push(str.substring(off, i));
sb.push("\\r");
off = ++i;
break;
}
case CharCode.DOUBLEQUOTE: {
if (!singleQuoted) {
if (i > off) sb.push(str.substring(off, i));
sb.push("\\\"");
off = ++i;
} else {
++i;
}
break;
}
case CharCode.SINGLEQUOTE: {
if (singleQuoted) {
if (i > off) sb.push(str.substring(off, i));
sb.push("\\'");
off = ++i;
} else {
++i;
}
break;
}
case CharCode.BACKSLASH: {
if (i > off) sb.push(str.substring(off, i));
sb.push("\\\\");
off = ++i;
break;
}
default: {
++i;
break;
}
}
}
if (i > off) sb.push(str.substring(off, i));
sb.push(quote);
}
visitStringLiteralExpression(node: StringLiteralExpression): void {
this.visitStringLiteral(node.value);
}
visitRegexpLiteralExpression(node: RegexpLiteralExpression): void {
var sb = this.sb;
sb.push("/");
sb.push(node.pattern);
sb.push("/");
sb.push(node.patternFlags);
}
visitNewExpression(node: NewExpression): void {
this.sb.push("new ");
this.visitCallExpression(node);
}
visitParenthesizedExpression(node: ParenthesizedExpression): void {
var sb = this.sb;
sb.push("(");
this.visitNode(node.expression);
sb.push(")");
}
visitPropertyAccessExpression(node: PropertyAccessExpression): void {
this.visitNode(node.expression);
this.sb.push(".");
this.visitIdentifierExpression(node.property);
}
visitTernaryExpression(node: TernaryExpression): void {
var sb = this.sb;
this.visitNode(node.condition);
sb.push(" ? ");
this.visitNode(node.ifThen);
sb.push(" : ");
this.visitNode(node.ifElse);
}
visitUnaryExpression(node: UnaryExpression): void {
switch (node.kind) {
case NodeKind.UNARYPOSTFIX: {
this.visitUnaryPostfixExpression(<UnaryPostfixExpression>node);
break;
}
case NodeKind.UNARYPREFIX: {
this.visitUnaryPrefixExpression(<UnaryPrefixExpression>node);
break;
}
default: assert(false);
}
}
visitUnaryPostfixExpression(node: UnaryPostfixExpression): void {
this.visitNode(node.operand);
this.sb.push(operatorTokenToString(node.operator));
}
visitUnaryPrefixExpression(node: UnaryPrefixExpression): void {
this.sb.push(operatorTokenToString(node.operator));
this.visitNode(node.operand);
}
// statements
visitNodeAndTerminate(statement: Statement): void {
this.visitNode(statement);
var sb = this.sb;
if (
!sb.length || // leading EmptyStatement
statement.kind == NodeKind.VARIABLE || // potentially assigns a FunctionExpression
statement.kind == NodeKind.EXPRESSION // potentially assigns a FunctionExpression
) {
sb.push(";\n");
} else {
let last = sb[sb.length - 1];
let lastCharPos = last.length - 1;
if (lastCharPos >= 0 && (
last.charCodeAt(lastCharPos) == CharCode.CLOSEBRACE ||
last.charCodeAt(lastCharPos) == CharCode.SEMICOLON)
) {
sb.push("\n");
} else {
sb.push(";\n");
}
}
}
visitBlockStatement(node: BlockStatement): void {
var sb = this.sb;
var statements = node.statements;
var numStatements = statements.length;
if (numStatements) {
sb.push("{\n");
let indentLevel = ++this.indentLevel;
for (let i = 0; i < numStatements; ++i) {
indent(sb, indentLevel);
this.visitNodeAndTerminate(statements[i]);
}
indent(sb, --this.indentLevel);
sb.push("}");
} else {
sb.push("{}");
}
}
visitBreakStatement(node: BreakStatement): void {
var label = node.label;
if (label) {
this.sb.push("break ");
this.visitIdentifierExpression(label);
} else {
this.sb.push("break");
}
}
visitContinueStatement(node: ContinueStatement): void {
var label = node.label;
if (label) {
this.sb.push("continue ");
this.visitIdentifierExpression(label);
} else {
this.sb.push("continue");
}
}
visitClassDeclaration(node: ClassDeclaration, isDefault: bool = false): void {
var decorators = node.decorators;
if (decorators) {
for (let i = 0, k = decorators.length; i < k; ++i) {
this.serializeDecorator(decorators[i]);
}
}
var sb = this.sb;
if (isDefault) {
sb.push("export default ");
} else {
this.serializeExternalModifiers(node);
}
if (node.is(CommonFlags.ABSTRACT)) sb.push("abstract ");
if (node.name.text.length) {
sb.push("class ");
this.visitIdentifierExpression(node.name);
} else {
sb.push("class");
}
var typeParameters = node.typeParameters;
if (typeParameters && typeParameters.length) {
sb.push("<");
this.visitTypeParameter(typeParameters[0]);
for (let i = 1, k = typeParameters.length; i < k; ++i) {
sb.push(", ");
this.visitTypeParameter(typeParameters[i]);
}
sb.push(">");
}
var extendsType = node.extendsType;
if (extendsType) {
sb.push(" extends ");
this.visitTypeNode(extendsType);
}
var implementsTypes = node.implementsTypes;
if (implementsTypes) {
let numImplementsTypes = implementsTypes.length;
if (numImplementsTypes) {
sb.push(" implements ");
this.visitTypeNode(implementsTypes[0]);
for (let i = 1; i < numImplementsTypes; ++i) {
sb.push(", ");
this.visitTypeNode(implementsTypes[i]);
}
}
}
var members = node.members;
var numMembers = members.length;
if (numMembers) {
sb.push(" {\n");
let indentLevel = ++this.indentLevel;
for (let i = 0, k = members.length; i < k; ++i) {
let member = members[i];
if (member.kind != NodeKind.FIELDDECLARATION || (<FieldDeclaration>member).parameterIndex < 0) {
indent(sb, indentLevel);
this.visitNodeAndTerminate(member);
}
}
indent(sb, --this.indentLevel);
sb.push("}");
} else {
sb.push(" {}");
}
}
visitDoStatement(node: DoStatement): void {
var sb = this.sb;
sb.push("do ");
this.visitNode(node.statement);
if (node.statement.kind == NodeKind.BLOCK) {
sb.push(" while (");
} else {
sb.push(";\n");
indent(sb, this.indentLevel);
sb.push("while (");
}
this.visitNode(node.condition);
sb.push(")");
}
visitEmptyStatement(node: EmptyStatement): void {
}
visitEnumDeclaration(node: EnumDeclaration, isDefault: bool = false): void {
var sb = this.sb;
if (isDefault) {
sb.push("export default ");
} else {
this.serializeExternalModifiers(node);
}
if (node.is(CommonFlags.CONST)) sb.push("const ");
sb.push("enum ");
this.visitIdentifierExpression(node.name);
var values = node.values;
var numValues = values.length;
if (numValues) {
sb.push(" {\n");
let indentLevel = ++this.indentLevel;
indent(sb, indentLevel);
this.visitEnumValueDeclaration(node.values[0]);
for (let i = 1; i < numValues; ++i) {
sb.push(",\n");
indent(sb, indentLevel);
this.visitEnumValueDeclaration(node.values[i]);
}
sb.push("\n");
indent(sb, --this.indentLevel);
sb.push("}");
} else {
sb.push(" {}");
}
}
visitEnumValueDeclaration(node: EnumValueDeclaration): void {
this.visitIdentifierExpression(node.name);
if (node.value) {
this.sb.push(" = ");
this.visitNode(node.value);
}
}
visitExportImportStatement(node: ExportImportStatement): void {
var sb = this.sb;
sb.push("export import ");
this.visitIdentifierExpression(node.externalName);
sb.push(" = ");
this.visitIdentifierExpression(node.name);
}