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/// <reference path="types.ts"/>
/// <reference path="core.ts"/>
/// <reference path="scanner.ts"/>
/// <reference path="parser.ts"/>
module ts {
export const enum ModuleInstanceState {
NonInstantiated = 0,
Instantiated = 1,
ConstEnumOnly = 2
}
export function getModuleInstanceState(node: Node): ModuleInstanceState {
// A module is uninstantiated if it contains only
// 1. interface declarations
if (node.kind === SyntaxKind.InterfaceDeclaration) {
return ModuleInstanceState.NonInstantiated;
}
// 2. const enum declarations don't make module instantiated
else if (isConstEnumDeclaration(node)) {
return ModuleInstanceState.ConstEnumOnly;
}
// 3. non - exported import declarations
else if (node.kind === SyntaxKind.ImportDeclaration && !(node.flags & NodeFlags.Export)) {
return ModuleInstanceState.NonInstantiated;
}
// 4. other uninstantiated module declarations.
else if (node.kind === SyntaxKind.ModuleBlock) {
var state = ModuleInstanceState.NonInstantiated;
forEachChild(node, n => {
switch (getModuleInstanceState(n)) {
case ModuleInstanceState.NonInstantiated:
// child is non-instantiated - continue searching
return false;
case ModuleInstanceState.ConstEnumOnly:
// child is const enum only - record state and continue searching
state = ModuleInstanceState.ConstEnumOnly;
return false;
case ModuleInstanceState.Instantiated:
// child is instantiated - record state and stop
state = ModuleInstanceState.Instantiated;
return true;
}
});
return state;
}
else if (node.kind === SyntaxKind.ModuleDeclaration) {
return getModuleInstanceState((<ModuleDeclaration>node).body);
}
else {
return ModuleInstanceState.Instantiated;
}
}
/**
* Returns false if any of the following are true:
* 1. declaration has no name
* 2. declaration has a literal name (not computed)
* 3. declaration has a computed property name that is a known symbol
*/
export function hasComputedNameButNotSymbol(declaration: Declaration): boolean {
return declaration.name && declaration.name.kind === SyntaxKind.ComputedPropertyName;
}
export function bindSourceFile(file: SourceFile) {
var parent: Node;
var container: Node;
var blockScopeContainer: Node;
var lastContainer: Node;
var symbolCount = 0;
var Symbol = objectAllocator.getSymbolConstructor();
var redeclaration = false;
if (!file.locals) {
file.locals = {};
container = blockScopeContainer = file;
bind(file);
file.symbolCount = symbolCount;
}
function createSymbol(flags: SymbolFlags, name: string): Symbol {
symbolCount++;
return new Symbol(flags, name);
}
function addDeclarationToSymbol(symbol: Symbol, node: Declaration, symbolKind: SymbolFlags) {
symbol.flags |= symbolKind;
if (!symbol.declarations) symbol.declarations = [];
symbol.declarations.push(node);
if (symbolKind & SymbolFlags.HasExports && !symbol.exports) symbol.exports = {};
if (symbolKind & SymbolFlags.HasMembers && !symbol.members) symbol.members = {};
node.symbol = symbol;
if (symbolKind & SymbolFlags.Value && !symbol.valueDeclaration) symbol.valueDeclaration = node;
}
// Should not be called on a declaration with a computed property name.
function getDeclarationName(node: Declaration): string {
if (node.name) {
if (node.kind === SyntaxKind.ModuleDeclaration && node.name.kind === SyntaxKind.StringLiteral) {
return '"' + (<LiteralExpression>node.name).text + '"';
}
Debug.assert(!hasComputedNameButNotSymbol(node));
return (<Identifier | LiteralExpression>node.name).text;
}
switch (node.kind) {
case SyntaxKind.ConstructorType:
case SyntaxKind.Constructor:
return "__constructor";
case SyntaxKind.FunctionType:
case SyntaxKind.CallSignature:
return "__call";
case SyntaxKind.ConstructSignature:
return "__new";
case SyntaxKind.IndexSignature:
return "__index";
}
}
function getDisplayName(node: Declaration): string {
return node.name ? declarationNameToString(node.name) : getDeclarationName(node);
}
function declareSymbol(symbols: SymbolTable, parent: Symbol, node: Declaration, includes: SymbolFlags, excludes: SymbolFlags): Symbol {
// Nodes with computed property names will not get symbols, because the type checker
// does not make properties for them.
if (hasComputedNameButNotSymbol(node)) {
return undefined;
}
var name = getDeclarationName(node);
if (name !== undefined) {
var symbol = hasProperty(symbols, name) ? symbols[name] : (symbols[name] = createSymbol(0, name));
if (symbol.flags & excludes) {
if (node.name) {
node.name.parent = node;
}
// Report errors every position with duplicate declaration
// Report errors on previous encountered declarations
var message = symbol.flags & SymbolFlags.BlockScopedVariable
? Diagnostics.Cannot_redeclare_block_scoped_variable_0
: Diagnostics.Duplicate_identifier_0;
forEach(symbol.declarations, declaration => {
file.semanticDiagnostics.push(createDiagnosticForNode(declaration.name, message, getDisplayName(declaration)));
});
file.semanticDiagnostics.push(createDiagnosticForNode(node.name, message, getDisplayName(node)));
symbol = createSymbol(0, name);
}
}
else {
symbol = createSymbol(0, "__missing");
}
addDeclarationToSymbol(symbol, node, includes);
symbol.parent = parent;
if (node.kind === SyntaxKind.ClassDeclaration && symbol.exports) {
// TypeScript 1.0 spec (April 2014): 8.4
// Every class automatically contains a static property member named 'prototype',
// the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
// It is an error to explicitly declare a static property member with the name 'prototype'.
var prototypeSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Prototype, "prototype");
if (hasProperty(symbol.exports, prototypeSymbol.name)) {
if (node.name) {
node.name.parent = node;
}
file.semanticDiagnostics.push(createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0],
Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
}
symbol.exports[prototypeSymbol.name] = prototypeSymbol;
prototypeSymbol.parent = symbol;
}
return symbol;
}
function isAmbientContext(node: Node): boolean {
while (node) {
if (node.flags & NodeFlags.Ambient) return true;
node = node.parent;
}
return false;
}
function declareModuleMember(node: Declaration, symbolKind: SymbolFlags, symbolExcludes: SymbolFlags) {
// Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
// ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
// on it. There are 2 main reasons:
//
// 1. We treat locals and exports of the same name as mutually exclusive within a container.
// That means the binder will issue a Duplicate Identifier error if you mix locals and exports
// with the same name in the same container.
// TODO: Make this a more specific error and decouple it from the exclusion logic.
// 2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
// but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
// when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
var exportKind = 0;
if (symbolKind & SymbolFlags.Value) {
exportKind |= SymbolFlags.ExportValue;
}
if (symbolKind & SymbolFlags.Type) {
exportKind |= SymbolFlags.ExportType;
}
if (symbolKind & SymbolFlags.Namespace) {
exportKind |= SymbolFlags.ExportNamespace;
}
if (node.flags & NodeFlags.Export || (node.kind !== SyntaxKind.ImportDeclaration && isAmbientContext(container))) {
if (exportKind) {
var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
node.localSymbol = local;
}
else {
declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
}
}
else {
declareSymbol(container.locals, undefined, node, symbolKind, symbolExcludes);
}
}
// All container nodes are kept on a linked list in declaration order. This list is used by the getLocalNameOfContainer function
// in the type checker to validate that the local name used for a container is unique.
function bindChildren(node: Node, symbolKind: SymbolFlags, isBlockScopeContainer: boolean) {
if (symbolKind & SymbolFlags.HasLocals) {
node.locals = {};
}
var saveParent = parent;
var saveContainer = container;
var savedBlockScopeContainer = blockScopeContainer;
parent = node;
if (symbolKind & SymbolFlags.IsContainer) {
container = node;
// Add container to container list unless this is a redeclaration
if (!redeclaration) {
container.nextContainer = undefined;
if (lastContainer) {
lastContainer.nextContainer = container;
}
lastContainer = container;
}
}
if (isBlockScopeContainer) {
blockScopeContainer = node;
}
forEachChild(node, bind);
container = saveContainer;
parent = saveParent;
blockScopeContainer = savedBlockScopeContainer;
}
function bindDeclaration(node: Declaration, symbolKind: SymbolFlags, symbolExcludes: SymbolFlags, isBlockScopeContainer: boolean) {
switch (container.kind) {
case SyntaxKind.ModuleDeclaration:
declareModuleMember(node, symbolKind, symbolExcludes);
break;
case SyntaxKind.SourceFile:
if (isExternalModule(<SourceFile>container)) {
declareModuleMember(node, symbolKind, symbolExcludes);
break;
}
case SyntaxKind.FunctionType:
case SyntaxKind.ConstructorType:
case SyntaxKind.CallSignature:
case SyntaxKind.ConstructSignature:
case SyntaxKind.IndexSignature:
case SyntaxKind.MethodDeclaration:
case SyntaxKind.MethodSignature:
case SyntaxKind.Constructor:
case SyntaxKind.GetAccessor:
case SyntaxKind.SetAccessor:
case SyntaxKind.FunctionDeclaration:
case SyntaxKind.FunctionExpression:
case SyntaxKind.ArrowFunction:
declareSymbol(container.locals, undefined, node, symbolKind, symbolExcludes);
break;
case SyntaxKind.ClassDeclaration:
if (node.flags & NodeFlags.Static) {
declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
break;
}
case SyntaxKind.TypeLiteral:
case SyntaxKind.ObjectLiteralExpression:
case SyntaxKind.InterfaceDeclaration:
declareSymbol(container.symbol.members, container.symbol, node, symbolKind, symbolExcludes);
break;
case SyntaxKind.EnumDeclaration:
declareSymbol(container.symbol.exports, container.symbol, node, symbolKind, symbolExcludes);
break;
}
bindChildren(node, symbolKind, isBlockScopeContainer);
}
function bindConstructorDeclaration(node: ConstructorDeclaration) {
bindDeclaration(node, SymbolFlags.Constructor, 0, /*isBlockScopeContainer*/ true);
var saveRedeclaration = redeclaration;
redeclaration = true;
forEach(node.parameters, p => {
if (p.flags & (NodeFlags.Public | NodeFlags.Private | NodeFlags.Protected)) {
bindDeclaration(p, SymbolFlags.Property, SymbolFlags.PropertyExcludes, /*isBlockScopeContainer*/ false);
}
});
redeclaration = saveRedeclaration;
}
function bindModuleDeclaration(node: ModuleDeclaration) {
if (node.name.kind === SyntaxKind.StringLiteral) {
bindDeclaration(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes, /*isBlockScopeContainer*/ true);
}
else {
var state = getModuleInstanceState(node);
if (state === ModuleInstanceState.NonInstantiated) {
bindDeclaration(node, SymbolFlags.NamespaceModule, SymbolFlags.NamespaceModuleExcludes, /*isBlockScopeContainer*/ true);
}
else {
bindDeclaration(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes, /*isBlockScopeContainer*/ true);
if (state === ModuleInstanceState.ConstEnumOnly) {
// mark value module as module that contains only enums
node.symbol.constEnumOnlyModule = true;
}
else if (node.symbol.constEnumOnlyModule) {
// const only value module was merged with instantiated module - reset flag
node.symbol.constEnumOnlyModule = false;
}
}
}
}
function bindFunctionOrConstructorType(node: SignatureDeclaration) {
// For a given function symbol "<...>(...) => T" we want to generate a symbol identical
// to the one we would get for: { <...>(...): T }
//
// We do that by making an anonymous type literal symbol, and then setting the function
// symbol as its sole member. To the rest of the system, this symbol will be indistinguishable
// from an actual type literal symbol you would have gotten had you used the long form.
var symbol = createSymbol(SymbolFlags.Signature, getDeclarationName(node));
addDeclarationToSymbol(symbol, node, SymbolFlags.Signature);
bindChildren(node, SymbolFlags.Signature, /*isBlockScopeContainer:*/ false);
var typeLiteralSymbol = createSymbol(SymbolFlags.TypeLiteral, "__type");
addDeclarationToSymbol(typeLiteralSymbol, node, SymbolFlags.TypeLiteral);
typeLiteralSymbol.members = {};
typeLiteralSymbol.members[node.kind === SyntaxKind.FunctionType ? "__call" : "__new"] = symbol
}
function bindAnonymousDeclaration(node: Declaration, symbolKind: SymbolFlags, name: string, isBlockScopeContainer: boolean) {
var symbol = createSymbol(symbolKind, name);
addDeclarationToSymbol(symbol, node, symbolKind);
bindChildren(node, symbolKind, isBlockScopeContainer);
}
function bindCatchVariableDeclaration(node: CatchClause) {
var symbol = createSymbol(SymbolFlags.FunctionScopedVariable, node.name.text || "__missing");
addDeclarationToSymbol(symbol, node, SymbolFlags.FunctionScopedVariable);
var saveParent = parent;
var savedBlockScopeContainer = blockScopeContainer;
parent = blockScopeContainer = node;
forEachChild(node, bind);
parent = saveParent;
blockScopeContainer = savedBlockScopeContainer;
}
function bindBlockScopedVariableDeclaration(node: Declaration) {
switch (blockScopeContainer.kind) {
case SyntaxKind.ModuleDeclaration:
declareModuleMember(node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
break;
case SyntaxKind.SourceFile:
if (isExternalModule(<SourceFile>container)) {
declareModuleMember(node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
break;
}
default:
if (!blockScopeContainer.locals) {
blockScopeContainer.locals = {};
}
declareSymbol(blockScopeContainer.locals, undefined, node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
}
bindChildren(node, SymbolFlags.BlockScopedVariable, /*isBlockScopeContainer*/ false);
}
function getDestructuringParameterName(node: Declaration) {
return "__" + indexOf((<SignatureDeclaration>node.parent).parameters, node);
}
function bind(node: Node) {
node.parent = parent;
switch (node.kind) {
case SyntaxKind.TypeParameter:
bindDeclaration(<Declaration>node, SymbolFlags.TypeParameter, SymbolFlags.TypeParameterExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.Parameter:
if (isBindingPattern((<Declaration>node).name)) {
bindAnonymousDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, getDestructuringParameterName(<Declaration>node), /*isBlockScopeContainer*/ false);
}
else {
bindDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, SymbolFlags.ParameterExcludes, /*isBlockScopeContainer*/ false);
}
break;
case SyntaxKind.VariableDeclaration:
case SyntaxKind.BindingElement:
if (isBindingPattern((<Declaration>node).name)) {
bindChildren(node, 0, /*isBlockScopeContainer*/ false);
}
else if (node.flags & NodeFlags.BlockScoped) {
bindBlockScopedVariableDeclaration(<Declaration>node);
}
else {
bindDeclaration(<Declaration>node, SymbolFlags.FunctionScopedVariable, SymbolFlags.FunctionScopedVariableExcludes, /*isBlockScopeContainer*/ false);
}
break;
case SyntaxKind.PropertyDeclaration:
case SyntaxKind.PropertySignature:
bindDeclaration(<Declaration>node, SymbolFlags.Property | ((<PropertyDeclaration>node).questionToken ? SymbolFlags.Optional : 0), SymbolFlags.PropertyExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.PropertyAssignment:
case SyntaxKind.ShorthandPropertyAssignment:
bindDeclaration(<Declaration>node, SymbolFlags.Property, SymbolFlags.PropertyExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.EnumMember:
bindDeclaration(<Declaration>node, SymbolFlags.EnumMember, SymbolFlags.EnumMemberExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.CallSignature:
case SyntaxKind.ConstructSignature:
case SyntaxKind.IndexSignature:
bindDeclaration(<Declaration>node, SymbolFlags.Signature, 0, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.MethodDeclaration:
case SyntaxKind.MethodSignature:
// If this is an ObjectLiteralExpression method, then it sits in the same space
// as other properties in the object literal. So we use SymbolFlags.PropertyExcludes
// so that it will conflict with any other object literal members with the same
// name.
bindDeclaration(<Declaration>node, SymbolFlags.Method | ((<MethodDeclaration>node).questionToken ? SymbolFlags.Optional : 0),
isObjectLiteralMethod(node) ? SymbolFlags.PropertyExcludes : SymbolFlags.MethodExcludes, /*isBlockScopeContainer*/ true);
break;
case SyntaxKind.FunctionDeclaration:
bindDeclaration(<Declaration>node, SymbolFlags.Function, SymbolFlags.FunctionExcludes, /*isBlockScopeContainer*/ true);
break;
case SyntaxKind.Constructor:
bindConstructorDeclaration(<ConstructorDeclaration>node);
break;
case SyntaxKind.GetAccessor:
bindDeclaration(<Declaration>node, SymbolFlags.GetAccessor, SymbolFlags.GetAccessorExcludes, /*isBlockScopeContainer*/ true);
break;
case SyntaxKind.SetAccessor:
bindDeclaration(<Declaration>node, SymbolFlags.SetAccessor, SymbolFlags.SetAccessorExcludes, /*isBlockScopeContainer*/ true);
break;
case SyntaxKind.FunctionType:
case SyntaxKind.ConstructorType:
bindFunctionOrConstructorType(<SignatureDeclaration>node);
break;
case SyntaxKind.TypeLiteral:
bindAnonymousDeclaration(<TypeLiteralNode>node, SymbolFlags.TypeLiteral, "__type", /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.ObjectLiteralExpression:
bindAnonymousDeclaration(<ObjectLiteralExpression>node, SymbolFlags.ObjectLiteral, "__object", /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.FunctionExpression:
case SyntaxKind.ArrowFunction:
bindAnonymousDeclaration(<FunctionExpression>node, SymbolFlags.Function, "__function", /*isBlockScopeContainer*/ true);
break;
case SyntaxKind.CatchClause:
bindCatchVariableDeclaration(<CatchClause>node);
break;
case SyntaxKind.ClassDeclaration:
bindDeclaration(<Declaration>node, SymbolFlags.Class, SymbolFlags.ClassExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.InterfaceDeclaration:
bindDeclaration(<Declaration>node, SymbolFlags.Interface, SymbolFlags.InterfaceExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.TypeAliasDeclaration:
bindDeclaration(<Declaration>node, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.EnumDeclaration:
if (isConst(node)) {
bindDeclaration(<Declaration>node, SymbolFlags.ConstEnum, SymbolFlags.ConstEnumExcludes, /*isBlockScopeContainer*/ false);
}
else {
bindDeclaration(<Declaration>node, SymbolFlags.RegularEnum, SymbolFlags.RegularEnumExcludes, /*isBlockScopeContainer*/ false);
}
break;
case SyntaxKind.ModuleDeclaration:
bindModuleDeclaration(<ModuleDeclaration>node);
break;
case SyntaxKind.ImportDeclaration:
bindDeclaration(<Declaration>node, SymbolFlags.Import, SymbolFlags.ImportExcludes, /*isBlockScopeContainer*/ false);
break;
case SyntaxKind.SourceFile:
if (isExternalModule(<SourceFile>node)) {
bindAnonymousDeclaration(<SourceFile>node, SymbolFlags.ValueModule, '"' + removeFileExtension((<SourceFile>node).filename) + '"', /*isBlockScopeContainer*/ true);
break;
}
case SyntaxKind.Block:
case SyntaxKind.TryBlock:
case SyntaxKind.CatchClause:
case SyntaxKind.FinallyBlock:
case SyntaxKind.ForStatement:
case SyntaxKind.ForInStatement:
case SyntaxKind.SwitchStatement:
bindChildren(node, 0, /*isBlockScopeContainer*/ true);
break;
default:
var saveParent = parent;
parent = node;
forEachChild(node, bind);
parent = saveParent;
}
}
}
}
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