private void Initialize()
{
_jintSwitchBlock = new JintSwitchCase[_switchBlock.Count];
for (var i = 0; i < _jintSwitchBlock.Length; i++)
{
_jintSwitchBlock[i] = new JintSwitchCase(_engine, _switchBlock[i]);
}
}
private void Initialize(EvaluationContext context)
{
var engine = context.Engine;
_jintSwitchBlock = new JintSwitchCase[_switchBlock.Count];
for (var i = 0; i < _jintSwitchBlock.Length; i++)
{
_jintSwitchBlock[i] = new JintSwitchCase(engine, _switchBlock[i]);
}
}
public Completion Execute(EvaluationContext context, JsValue input)
{
if (!_initialized)
{
Initialize(context);
_initialized = true;
}
var engine = context.Engine;
JsValue v = Undefined.Instance;
Location l = context.LastSyntaxNode.Location;
JintSwitchCase defaultCase = null;
bool hit = false;
for (var i = 0; i < (uint)_jintSwitchBlock.Length; i++)
{
var clause = _jintSwitchBlock[i];
EnvironmentRecord oldEnv = null;
if (clause.LexicalDeclarations != null)
{
oldEnv = engine.ExecutionContext.LexicalEnvironment;
var blockEnv = JintEnvironment.NewDeclarativeEnvironment(engine, oldEnv);
JintStatementList.BlockDeclarationInstantiation(engine, blockEnv, clause.LexicalDeclarations);
engine.UpdateLexicalEnvironment(blockEnv);
}
if (clause.Test == null)
{
defaultCase = clause;
}
else
{
var clauseSelector = clause.Test.GetValue(context).Value;
if (clauseSelector == input)
{
hit = true;
}
}
if (hit && clause.Consequent != null)
{
var r = clause.Consequent.Execute(context);
if (oldEnv is not null)
{
engine.UpdateLexicalEnvironment(oldEnv);
}
if (r.Type != CompletionType.Normal)
{
return(r);
}
l = r.Location;
v = r.Value ?? Undefined.Instance;
}
}
// do we need to execute the default case ?
if (hit == false && defaultCase != null)
{
EnvironmentRecord oldEnv = null;
if (defaultCase.LexicalDeclarations != null)
{
oldEnv = engine.ExecutionContext.LexicalEnvironment;
var blockEnv = JintEnvironment.NewDeclarativeEnvironment(engine, oldEnv);
JintStatementList.BlockDeclarationInstantiation(engine, blockEnv, defaultCase.LexicalDeclarations);
engine.UpdateLexicalEnvironment(blockEnv);
}
var r = defaultCase.Consequent.Execute(context);
if (oldEnv is not null)
{
engine.UpdateLexicalEnvironment(oldEnv);
}
if (r.Type != CompletionType.Normal)
{
return(r);
}
l = r.Location;
v = r.Value ?? Undefined.Instance;
}
return(new Completion(CompletionType.Normal, v, null, l));
}
public Completion Execute(JsValue input)
{
if (!_initialized)
{
Initialize();
_initialized = true;
}
JsValue v = Undefined.Instance;
Location l = _engine._lastSyntaxNode.Location;
JintSwitchCase defaultCase = null;
bool hit = false;
for (var i = 0; i < (uint)_jintSwitchBlock.Length; i++)
{
var clause = _jintSwitchBlock[i];
LexicalEnvironment oldEnv = null;
if (clause.LexicalDeclarations != null)
{
oldEnv = _engine.ExecutionContext.LexicalEnvironment;
var blockEnv = LexicalEnvironment.NewDeclarativeEnvironment(_engine, oldEnv);
JintStatementList.BlockDeclarationInstantiation(blockEnv, clause.LexicalDeclarations);
_engine.UpdateLexicalEnvironment(blockEnv);
}
if (clause.Test == null)
{
defaultCase = clause;
}
else
{
var clauseSelector = clause.Test.GetValue();
if (JintBinaryExpression.StrictlyEqual(clauseSelector, input))
{
hit = true;
}
}
if (hit && clause.Consequent != null)
{
var r = clause.Consequent.Execute();
if (oldEnv != null)
{
_engine.UpdateLexicalEnvironment(oldEnv);
}
if (r.Type != CompletionType.Normal)
{
return(r);
}
l = r.Location;
v = r.Value ?? Undefined.Instance;
}
}
// do we need to execute the default case ?
if (hit == false && defaultCase != null)
{
LexicalEnvironment oldEnv = null;
if (defaultCase.LexicalDeclarations != null)
{
oldEnv = _engine.ExecutionContext.LexicalEnvironment;
var blockEnv = LexicalEnvironment.NewDeclarativeEnvironment(_engine, oldEnv);
JintStatementList.BlockDeclarationInstantiation(blockEnv, defaultCase.LexicalDeclarations);
_engine.UpdateLexicalEnvironment(blockEnv);
}
var r = defaultCase.Consequent.Execute();
if (oldEnv != null)
{
_engine.UpdateLexicalEnvironment(oldEnv);
}
if (r.Type != CompletionType.Normal)
{
return(r);
}
l = r.Location;
v = r.Value ?? Undefined.Instance;
}
return(new Completion(CompletionType.Normal, v, null, l));
}
