use of com.github.anba.es6draft.runtime.GlobalEnvironmentRecord in project es6draft by anba.
the class GlobalDeclarationInstantiationGenerator method generate.
private void generate(Script script, InstructionVisitor mv) {
Variable<ExecutionContext> context = mv.getParameter(EXECUTION_CONTEXT, ExecutionContext.class);
Variable<LexicalEnvironment<GlobalEnvironmentRecord>> env = mv.newVariable("globalEnv", LexicalEnvironment.class).uncheckedCast();
Variable<GlobalEnvironmentRecord> envRec = mv.newVariable("envRec", GlobalEnvironmentRecord.class);
Variable<FunctionObject> fo = null;
/* steps 1-2 */
getLexicalEnvironment(context, env, mv);
getEnvironmentRecord(env, envRec, mv);
/* step 3 */
HashSet<Name> lexNames = new HashSet<>();
/* step 4 */
HashSet<Name> varNames = new HashSet<>();
// Iterate over declarations to be able to emit line-info entries.
for (Declaration d : LexicallyScopedDeclarations(script)) {
assert !(d instanceof HoistableDeclaration);
for (Name name : BoundNames(d)) {
if (lexNames.add(name)) {
canDeclareLexicalScopedOrThrow(context, envRec, d, name, mv);
}
}
}
// Iterate over declarations to be able to emit line-info entries.
for (StatementListItem item : VarScopedDeclarations(script)) {
if (item instanceof VariableStatement) {
for (VariableDeclaration vd : ((VariableStatement) item).getElements()) {
for (Name name : BoundNames(vd)) {
if (varNames.add(name)) {
canDeclareVarScopedOrThrow(context, envRec, vd, name, mv);
}
}
}
} else {
HoistableDeclaration d = (HoistableDeclaration) item;
Name name = BoundName(d);
if (varNames.add(name)) {
canDeclareVarScopedOrThrow(context, envRec, d, name, mv);
}
}
}
/* step 7 */
List<StatementListItem> varDeclarations = VarScopedDeclarations(script);
/* step 8 */
ArrayDeque<HoistableDeclaration> functionsToInitialize = new ArrayDeque<>();
/* step 9 */
HashSet<Name> declaredFunctionNames = new HashSet<>();
/* step 10 */
for (StatementListItem item : reverse(varDeclarations)) {
if (item instanceof HoistableDeclaration) {
HoistableDeclaration d = (HoistableDeclaration) item;
Name fn = BoundName(d);
if (declaredFunctionNames.add(fn)) {
canDeclareGlobalFunctionOrThrow(context, envRec, d, fn, mv);
functionsToInitialize.addFirst(d);
}
}
}
if (!functionsToInitialize.isEmpty()) {
fo = mv.newVariable("fo", FunctionObject.class);
}
/* step 11 */
LinkedHashMap<Name, VariableDeclaration> declaredVarNames = new LinkedHashMap<>();
/* step 12 */
for (StatementListItem d : varDeclarations) {
if (d instanceof VariableStatement) {
for (VariableDeclaration vd : ((VariableStatement) d).getElements()) {
for (Name vn : BoundNames(vd)) {
if (!declaredFunctionNames.contains(vn)) {
canDeclareGlobalVarOrThrow(context, envRec, vd, vn, mv);
declaredVarNames.put(vn, vd);
}
}
}
}
}
// ES2016: Block-scoped global function declarations
if (hasBlockFunctions(script)) {
int idCounter = 0;
HashSet<Name> declaredFunctionOrVarNames = new HashSet<>();
declaredFunctionOrVarNames.addAll(declaredFunctionNames);
declaredFunctionOrVarNames.addAll(declaredVarNames.keySet());
for (FunctionDeclaration f : script.getScope().blockFunctions()) {
Name fn = BoundName(f);
Jump next = new Jump();
// Runtime check always required for global block-level function declarations.
f.setLegacyBlockScopeId(++idCounter);
// FIXME: spec issue - avoid (observable!) duplicate checks for same name?
// FIXME: spec issue - property creation order important?
canDeclareGlobalFunction(envRec, f, fn, next, mv);
setLegacyBlockFunction(context, f, mv);
if (declaredFunctionOrVarNames.add(fn)) {
createGlobalFunctionBinding(envRec, f, fn, false, mv);
}
mv.mark(next);
}
}
/* step 14 */
List<Declaration> lexDeclarations = LexicallyScopedDeclarations(script);
/* step 15 */
for (Declaration d : lexDeclarations) {
assert !(d instanceof HoistableDeclaration);
mv.lineInfo(d);
for (Name dn : BoundNames(d)) {
BindingOp<GlobalEnvironmentRecord> op = BindingOp.of(envRec, dn);
if (d.isConstDeclaration()) {
op.createImmutableBinding(envRec, dn, true, mv);
} else {
op.createMutableBinding(envRec, dn, false, mv);
}
}
}
/* step 16 */
for (HoistableDeclaration f : functionsToInitialize) {
Name fn = BoundName(f);
InstantiateFunctionObject(context, env, f, mv);
mv.store(fo);
createGlobalFunctionBinding(envRec, f, fn, fo, false, mv);
}
/* step 17 */
for (Map.Entry<Name, VariableDeclaration> e : declaredVarNames.entrySet()) {
createGlobalVarBinding(envRec, e.getValue(), e.getKey(), false, mv);
}
/* step 18 */
mv._return();
}
use of com.github.anba.es6draft.runtime.GlobalEnvironmentRecord in project es6draft by anba.
the class EvalDeclarationInstantiationGenerator method generateGlobal.
private void generateGlobal(Script evalScript, InstructionVisitor mv) {
assert evalScript.isGlobalCode() && !evalScript.isStrict() && !evalScript.isScripting();
Variable<ExecutionContext> context = mv.getParameter(EXECUTION_CONTEXT, ExecutionContext.class);
Variable<LexicalEnvironment<GlobalEnvironmentRecord>> varEnv = mv.newVariable("varEnv", LexicalEnvironment.class).uncheckedCast();
Variable<LexicalEnvironment<DeclarativeEnvironmentRecord>> lexEnv = mv.newVariable("lexEnv", LexicalEnvironment.class).uncheckedCast();
Variable<FunctionObject> fo = null;
getVariableEnvironment(context, varEnv, mv);
getLexicalEnvironment(context, lexEnv, mv);
/* step 1 */
Set<Name> varNames = VarDeclaredNames(evalScript);
/* step 2 */
List<StatementListItem> varDeclarations = VarScopedDeclarations(evalScript);
/* step 3 */
Variable<DeclarativeEnvironmentRecord> lexEnvRec = mv.newVariable("lexEnvRec", DeclarativeEnvironmentRecord.class);
/* step 4 */
Variable<GlobalEnvironmentRecord> varEnvRec = mv.newVariable("varEnvRec", GlobalEnvironmentRecord.class);
getEnvironmentRecord(varEnv, varEnvRec, mv);
/* step 5 */
if (!varNames.isEmpty()) {
/* step 5.a */
// Iterate over declarations to be able to emit line-info entries.
HashSet<Name> checkedVarNames = new HashSet<>();
for (StatementListItem item : VarScopedDeclarations(evalScript)) {
if (item instanceof VariableStatement) {
for (VariableDeclaration vd : ((VariableStatement) item).getElements()) {
for (Name name : BoundNames(vd)) {
if (checkedVarNames.add(name)) {
canDeclareVarScopedOrThrow(context, varEnvRec, vd, name, mv);
}
}
}
} else {
HoistableDeclaration d = (HoistableDeclaration) item;
Name name = BoundName(d);
if (checkedVarNames.add(name)) {
canDeclareVarScopedOrThrow(context, varEnvRec, d, name, mv);
}
}
}
/* steps 5.b-d */
if (isEnclosedByLexicalOrHasVarForOf(evalScript)) {
checkLexicalRedeclaration(evalScript, context, varEnv, lexEnv, varNames, mv);
}
}
/* step 6 */
ArrayDeque<HoistableDeclaration> functionsToInitialize = new ArrayDeque<>();
/* step 7 */
HashSet<Name> declaredFunctionNames = new HashSet<>();
/* step 8 */
for (StatementListItem item : reverse(varDeclarations)) {
if (item instanceof HoistableDeclaration) {
HoistableDeclaration d = (HoistableDeclaration) item;
Name fn = BoundName(d);
if (declaredFunctionNames.add(fn)) {
canDeclareGlobalFunctionOrThrow(context, varEnvRec, d, fn, mv);
functionsToInitialize.addFirst(d);
}
}
}
if (!functionsToInitialize.isEmpty()) {
fo = mv.newVariable("fo", FunctionObject.class);
}
/* step 9 */
LinkedHashMap<Name, VariableDeclaration> declaredVarNames = new LinkedHashMap<>();
/* step 10 */
for (StatementListItem d : varDeclarations) {
if (d instanceof VariableStatement) {
for (VariableDeclaration vd : ((VariableStatement) d).getElements()) {
for (Name vn : BoundNames(vd)) {
if (!declaredFunctionNames.contains(vn)) {
canDeclareGlobalVarOrThrow(context, varEnvRec, vd, vn, mv);
declaredVarNames.put(vn, vd);
}
}
}
}
}
// ES2016: Block-scoped global function declarations
if (hasBlockFunctions(evalScript)) {
final boolean catchVar = codegen.isEnabled(CompatibilityOption.CatchVarStatement);
int idCounter = 0;
List<FunctionDeclaration> blockFunctions = evalScript.getScope().blockFunctions();
HashSet<Name> declaredFunctionOrVarNames = new HashSet<>();
declaredFunctionOrVarNames.addAll(declaredFunctionNames);
declaredFunctionOrVarNames.addAll(declaredVarNames.keySet());
for (FunctionDeclaration f : blockFunctions) {
Name fn = f.getName();
Jump next = new Jump();
// Runtime check always required for global block-level function declarations.
f.setLegacyBlockScopeId(++idCounter);
if (isEnclosedByLexical(evalScript)) {
canDeclareVarBinding(varEnv, lexEnv, fn, catchVar, next, mv);
}
// FIXME: spec issue - avoid (observable!) duplicate checks for same name?
// FIXME: spec issue - property creation order important?
canDeclareGlobalFunction(varEnvRec, f, fn, next, mv);
setLegacyBlockFunction(context, f, mv);
if (declaredFunctionOrVarNames.add(fn)) {
createGlobalFunctionBinding(varEnvRec, f, fn, true, mv);
}
mv.mark(next);
}
}
/* step 12 */
List<Declaration> lexDeclarations = LexicallyScopedDeclarations(evalScript);
/* step 13 */
if (!lexDeclarations.isEmpty()) {
getEnvironmentRecord(lexEnv, lexEnvRec, mv);
createLexicalDeclarations(lexDeclarations, lexEnvRec, mv);
}
/* step 14 */
for (HoistableDeclaration f : functionsToInitialize) {
Name fn = BoundName(f);
InstantiateFunctionObject(context, lexEnv, f, mv);
mv.store(fo);
createGlobalFunctionBinding(varEnvRec, f, fn, fo, true, mv);
}
/* step 15 */
for (Map.Entry<Name, VariableDeclaration> e : declaredVarNames.entrySet()) {
createGlobalVarBinding(varEnvRec, e.getValue(), e.getKey(), true, mv);
}
/* step 16 */
mv._return();
}
use of com.github.anba.es6draft.runtime.GlobalEnvironmentRecord in project es6draft by anba.
the class DeclarationBindingInstantiation method EvalDeclarationInstantiation.
/**
* 18.2.1.2 Runtime Semantics: EvalDeclarationInstantiation (body, varEnv, lexEnv, strict)
*
* @param cx
* the execution context
* @param evalScript
* the global script to instantiate
* @param varEnv
* the variable environment
* @param lexEnv
* the lexical environment
*/
public static void EvalDeclarationInstantiation(ExecutionContext cx, Script evalScript, LexicalEnvironment<?> varEnv, LexicalEnvironment<DeclarativeEnvironmentRecord> lexEnv) {
boolean strict = evalScript.isStrict();
boolean nonStrictGlobal = !strict && evalScript.isGlobalCode() && !evalScript.isScripting();
/* step 1 */
Set<Name> varNames = VarDeclaredNames(evalScript);
/* step 2 */
List<StatementListItem> varDeclarations = VarScopedDeclarations(evalScript);
/* step 3 (not applicable) */
/* step 4 */
EnvironmentRecord varEnvRec = varEnv.getEnvRec();
assert !nonStrictGlobal || varEnvRec instanceof GlobalEnvironmentRecord : String.format("Unexpected environment record type: %s", varEnvRec);
/* step 5 */
if (!strict) {
if (nonStrictGlobal) {
/* step 5.a */
GlobalEnvironmentRecord gEnvRec = (GlobalEnvironmentRecord) varEnvRec;
for (Name name : varNames) {
ScriptRuntime.canDeclareVarScopedOrThrow(cx, gEnvRec, name.getIdentifier());
}
}
/* steps 5.b-d */
if (!evalScript.isScripting() && !varNames.isEmpty() && isEnclosedByLexicalOrHasVarForOf(evalScript)) {
checkLexicalRedeclaration(cx, varEnv, lexEnv, varNames);
}
}
/* steps 6-8 (not applicable) */
/* step 9 */
LinkedHashSet<Name> declaredNames = new LinkedHashSet<>();
/* step 10 */
for (StatementListItem d : varDeclarations) {
assert d instanceof VariableStatement;
for (Name vn : BoundNames((VariableStatement) d)) {
if (nonStrictGlobal) {
GlobalEnvironmentRecord gEnvRec = (GlobalEnvironmentRecord) varEnvRec;
ScriptRuntime.canDeclareGlobalVarOrThrow(cx, gEnvRec, vn.getIdentifier());
}
declaredNames.add(vn);
}
}
/* steps 12-13 */
assert LexicallyScopedDeclarations(evalScript).isEmpty();
/* step 15 */
for (Name vn : declaredNames) {
if (nonStrictGlobal) {
GlobalEnvironmentRecord gEnvRec = (GlobalEnvironmentRecord) varEnvRec;
gEnvRec.createGlobalVarBinding(vn.getIdentifier(), true);
} else {
boolean bindingExists = varEnvRec.hasBinding(vn.getIdentifier());
if (!bindingExists) {
varEnvRec.createMutableBinding(vn.getIdentifier(), true);
varEnvRec.initializeBinding(vn.getIdentifier(), UNDEFINED);
}
}
}
/* step 16 (return) */
}
use of com.github.anba.es6draft.runtime.GlobalEnvironmentRecord in project es6draft by anba.
the class AsyncFunctionConstructor method CreateDynamicFunction.
/**
* 19.2.1.1.1 RuntimeSemantics: CreateDynamicFunction(constructor, newTarget, kind, args)
*
* @param callerContext
* the caller execution context
* @param cx
* the execution context
* @param newTarget
* the newTarget constructor function
* @param args
* the function arguments
* @return the new generator function object
*/
private static OrdinaryAsyncFunction CreateDynamicFunction(ExecutionContext callerContext, ExecutionContext cx, Constructor newTarget, Object... args) {
/* step 1 (not applicable) */
/* step 2 (not applicable) */
/* step 3 */
Intrinsics fallbackProto = Intrinsics.AsyncFunction;
/* steps 4-10 */
String[] sourceText = functionSourceText(cx, args);
String parameters = sourceText[0], bodyText = sourceText[1];
/* steps 11, 13-20 */
Source source = functionSource(SourceKind.AsyncFunction, cx.getRealm(), callerContext);
RuntimeInfo.Function function;
try {
ScriptLoader scriptLoader = cx.getRealm().getScriptLoader();
function = scriptLoader.asyncFunction(source, parameters, bodyText).getFunction();
} catch (ParserException | CompilationException e) {
throw e.toScriptException(cx);
}
/* step 12 */
boolean strict = function.isStrict();
/* steps 21-22 */
ScriptObject proto = GetPrototypeFromConstructor(cx, newTarget, fallbackProto);
/* step 23 */
OrdinaryAsyncFunction f = FunctionAllocate(cx, proto, strict, FunctionKind.Normal);
/* steps 24-25 */
LexicalEnvironment<GlobalEnvironmentRecord> scope = f.getRealm().getGlobalEnv();
/* step 26 */
FunctionInitialize(f, FunctionKind.Normal, function, scope, newFunctionExecutable(source));
/* steps 27-28 (not applicable) */
/* step 29 */
SetFunctionName(f, "anonymous");
/* step 30 */
return f;
}
use of com.github.anba.es6draft.runtime.GlobalEnvironmentRecord in project es6draft by anba.
the class GeneratorFunctionConstructor method CreateDynamicConstructorGenerator.
private static OrdinaryConstructorGenerator CreateDynamicConstructorGenerator(ExecutionContext callerContext, ExecutionContext cx, Constructor newTarget, Object... args) {
/* step 1 (not applicable) */
/* step 2 (not applicable) */
/* step 3 */
Intrinsics fallbackProto = Intrinsics.Generator;
/* steps 4-10 */
String[] sourceText = functionSourceText(cx, args);
String parameters = sourceText[0], bodyText = sourceText[1];
/* steps 11, 13-20 */
Source source = functionSource(SourceKind.Generator, cx.getRealm(), callerContext);
RuntimeInfo.Function function;
try {
ScriptLoader scriptLoader = cx.getRealm().getScriptLoader();
function = scriptLoader.generator(source, parameters, bodyText).getFunction();
} catch (ParserException | CompilationException e) {
throw e.toScriptException(cx);
}
/* step 12 */
boolean strict = function.isStrict();
/* steps 21-22 */
ScriptObject proto = GetPrototypeFromConstructor(cx, newTarget, fallbackProto);
/* step 23 */
OrdinaryConstructorGenerator f = OrdinaryConstructorGenerator.FunctionAllocate(cx, proto, strict, FunctionKind.Normal);
/* steps 24-25 */
LexicalEnvironment<GlobalEnvironmentRecord> scope = f.getRealm().getGlobalEnv();
/* step 26 */
FunctionInitialize(f, FunctionKind.Normal, function, scope, newFunctionExecutable(source));
/* step 27 */
OrdinaryObject prototype = ObjectCreate(cx, Intrinsics.GeneratorPrototype);
MakeConstructor(f, true, prototype);
/* step 28 (not applicable) */
/* step 29 */
SetFunctionName(f, "anonymous");
/* step 30 */
return f;
}
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