/// <summary>
/// Constructor.
/// </summary>
/// <param name="program">Program</param>
/// <param name="machineNode">MachineDeclarationNode</param>
/// <param name="stateNode">StateDeclarationNode</param>
/// <param name="isModel">Is a model</param>
internal BlockSyntax(IPSharpProgram program, MachineDeclaration machineNode,
StateDeclaration stateNode, bool isModel)
: base(program, isModel)
{
this.Machine = machineNode;
this.State = stateNode;
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
internal void Visit(StateDeclaration parentNode)
{
if (parentNode.ExitDeclaration != null)
{
throw new ParsingException("Duplicate exit declaration.",
new List<TokenType>());
}
var node = new ExitDeclaration(base.TokenStream.Program, parentNode.IsModel);
node.ExitKeyword = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket)
{
throw new ParsingException("Expected \"{\".",
new List<TokenType>
{
TokenType.LeftCurlyBracket
});
}
var blockNode = new BlockSyntax(base.TokenStream.Program, parentNode.Machine,
parentNode, node.IsModel);
new BlockSyntaxVisitor(base.TokenStream).Visit(blockNode);
node.StatementBlock = blockNode;
parentNode.ExitDeclaration = node;
}
/// <summary>
/// Initializes a new instance of the <see cref="BlockSyntax"/> class.
/// </summary>
internal BlockSyntax(IPSharpProgram program, MachineDeclaration machineNode,
StateDeclaration stateNode)
: base(program)
{
this.Machine = machineNode;
this.State = stateNode;
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
/// <param name="isStart">Is start state</param>
/// <param name="accMod">Access modifier</param>
internal void Visit(MachineDeclaration parentNode, bool isStart, AccessModifier accMod)
{
var node = new StateDeclaration(base.TokenStream.Program, parentNode,
isStart, parentNode.IsModel);
node.AccessModifier = accMod;
node.StateKeyword = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Identifier)
{
throw new ParsingException("Expected state identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
base.TokenStream.CurrentState = base.TokenStream.Peek().Text;
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateIdentifier));
node.Identifier = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket)
{
throw new ParsingException("Expected \"{\".",
new List<TokenType>
{
TokenType.LeftCurlyBracket
});
}
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateLeftCurlyBracket));
node.LeftCurlyBracketToken = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Program is PSharpProgram)
{
this.VisitNextPSharpIntraStateDeclaration(node);
}
else
{
this.VisitNextPIntraStateDeclaration(node);
}
parentNode.StateDeclarations.Add(node);
}
private void ProcessEntryOrExitDeclaration <T>(StateDeclaration state, T declaration, ref string text,
int indentLevel, ref string newLine, int offset)
where T : PSharpSyntaxNode
{
// This should be a local function, but it cannot because of the ref parameter.
if (declaration != null)
{
// For the C# rewriting here, the parent is actually the machine instance.
// on which the rewritten method resides.
state.ProjectionNode.AddChild(declaration.ProjectionNode, this.ProjectionNode);
declaration.Rewrite(indentLevel);
text += newLine;
// The rewritten offset is relative to the machine, which is the C# parent.
declaration.ProjectionNode.SetOffsetInParent(offset + text.Length);
text += declaration.TextUnit.Text;
newLine = "\n";
}
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
internal void Visit(StateDeclaration parentNode)
{
if (parentNode.Machine.IsMonitor)
{
throw new ParsingException("Monitors cannot \"defer\".",
new List<TokenType>());
}
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
var nameVisitor = new NameVisitor(base.TokenStream);
// Consumes multiple generic event names.
var eventIdentifiers =
nameVisitor.ConsumeMultipleNames(TokenType.EventIdentifier,
tt => nameVisitor.ConsumeGenericEventName(tt));
var resolvedEventIdentifiers = new Dictionary<Token, List<Token>>();
foreach (var eventIdentifier in eventIdentifiers)
{
if (eventIdentifier.Count == 1)
{
// We don't want to collapse halt and default
// events to event identifiers.
resolvedEventIdentifiers.Add(eventIdentifier[0], eventIdentifier);
}
else
{
var identifierBuilder = new StringBuilder();
foreach (var token in eventIdentifier)
{
identifierBuilder.Append(token.TextUnit.Text);
}
TextUnit textUnit = new TextUnit(identifierBuilder.ToString(),
eventIdentifier[0].TextUnit.Line);
resolvedEventIdentifiers.Add(new Token(textUnit, TokenType.EventIdentifier),
eventIdentifier);
}
}
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddDeferredEvent(kvp.Key, kvp.Value))
{
throw new ParsingException("Unexpected defer declaration.",
new List<TokenType>());
}
}
if (!base.TokenStream.Done &&
base.TokenStream.Peek().Type == TokenType.Identifier)
{
throw new ParsingException("Expected \",\".",
new List<TokenType>
{
TokenType.Comma
});
}
if (!base.TokenStream.Done &&
(base.TokenStream.Peek().Type == TokenType.LeftAngleBracket ||
base.TokenStream.Peek().Type == TokenType.RightAngleBracket))
{
throw new ParsingException("Invalid generic expression.",
new List<TokenType> { });
}
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="program">Program</param>
/// <param name="stateNode">StateDeclaration</param>
internal EntryDeclaration(IPSharpProgram program, StateDeclaration stateNode)
: base(program)
{
this.State = stateNode;
}
/// <summary>
/// Visits the next intra-state declration.
/// </summary>
/// <param name="node">Node</param>
private void VisitNextPIntraStateDeclaration(StateDeclaration node)
{
bool fixpoint = false;
while (!fixpoint)
{
var token = base.TokenStream.Peek();
switch (token.Type)
{
case TokenType.WhiteSpace:
case TokenType.Comment:
case TokenType.NewLine:
base.TokenStream.Index++;
break;
case TokenType.CommentLine:
case TokenType.Region:
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
break;
case TokenType.CommentStart:
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
break;
case TokenType.Entry:
new StateEntryDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.Exit:
new StateExitDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.OnAction:
new StateActionDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.DeferEvent:
new DeferEventsDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.IgnoreEvent:
new IgnoreEventsDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.RightCurlyBracket:
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateRightCurlyBracket));
node.RightCurlyBracketToken = base.TokenStream.Peek();
base.TokenStream.CurrentState = "";
fixpoint = true;
break;
default:
throw new ParsingException("Unexpected token.",
new List<TokenType>());
}
if (base.TokenStream.Done)
{
throw new ParsingException("Expected \"}\".",
new List<TokenType>
{
TokenType.Entry,
TokenType.Exit,
TokenType.OnAction,
TokenType.DeferEvent,
TokenType.IgnoreEvent
});
}
}
}
/// <summary>
/// Visits the next intra-state declration.
/// </summary>
/// <param name="node">Node</param>
private void VisitNextPSharpIntraStateDeclaration(StateDeclaration node)
{
bool fixpoint = false;
while (!fixpoint)
{
var token = base.TokenStream.Peek();
switch (token.Type)
{
case TokenType.WhiteSpace:
case TokenType.Comment:
case TokenType.NewLine:
base.TokenStream.Index++;
break;
case TokenType.CommentLine:
case TokenType.Region:
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
break;
case TokenType.CommentStart:
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
break;
case TokenType.Entry:
new StateEntryDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.Exit:
new StateExitDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.OnAction:
new StateActionDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.DeferEvent:
new DeferEventsDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.IgnoreEvent:
new IgnoreEventsDeclarationVisitor(base.TokenStream).Visit(node);
base.TokenStream.Index++;
break;
case TokenType.LeftSquareBracket:
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
new AttributeListVisitor(base.TokenStream).Visit();
base.TokenStream.Index++;
break;
case TokenType.RightCurlyBracket:
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateRightCurlyBracket));
node.RightCurlyBracketToken = base.TokenStream.Peek();
base.TokenStream.CurrentState = "";
fixpoint = true;
break;
case TokenType.Private:
case TokenType.Protected:
case TokenType.Internal:
case TokenType.Public:
throw new ParsingException("State actions cannot have modifiers.",
new List<TokenType>());
case TokenType.Abstract:
case TokenType.Virtual:
throw new ParsingException("State actions cannot be abstract or virtual.",
new List<TokenType>());
default:
throw new ParsingException("Unexpected token.",
new List<TokenType>());
}
if (base.TokenStream.Done)
{
throw new ParsingException("Expected \"}\".",
new List<TokenType>
{
TokenType.Entry,
TokenType.Exit,
TokenType.OnAction,
TokenType.DeferEvent,
TokenType.IgnoreEvent,
TokenType.LeftSquareBracket,
TokenType.RightCurlyBracket
});
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="EntryDeclaration"/> class.
/// </summary>
internal EntryDeclaration(IPSharpProgram program, StateDeclaration stateNode, bool isAsync = false)
: base(program)
{
this.State = stateNode;
this.IsAsync = isAsync;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="program">Program</param>
/// <param name="stateNode">StateDeclaration</param>
internal ExitDeclaration(IPSharpProgram program, StateDeclaration stateNode)
: base(program)
{
this.State = stateNode;
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
internal void Visit(StateDeclaration parentNode)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.HaltEvent &&
base.TokenStream.Peek().Type != TokenType.DefaultEvent))
{
throw new ParsingException("Expected event identifier.",
new List<TokenType>
{
TokenType.Identifier,
TokenType.HaltEvent,
TokenType.DefaultEvent
});
}
bool expectsComma = false;
while (!base.TokenStream.Done &&
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
if (!expectsComma &&
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.HaltEvent &&
base.TokenStream.Peek().Type != TokenType.DefaultEvent))
{
throw new ParsingException("Expected event identifier.",
new List<TokenType>
{
TokenType.Identifier,
TokenType.HaltEvent,
TokenType.DefaultEvent
});
}
if (expectsComma && base.TokenStream.Peek().Type != TokenType.Comma)
{
throw new ParsingException("Expected \",\".",
new List<TokenType>
{
TokenType.Comma
});
}
if (base.TokenStream.Peek().Type == TokenType.Identifier)
{
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.EventIdentifier));
if (!parentNode.AddIgnoredEvent(base.TokenStream.Peek()))
{
throw new ParsingException("Unexpected event identifier.",
new List<TokenType>());
}
expectsComma = true;
}
else if (base.TokenStream.Peek().Type == TokenType.HaltEvent ||
base.TokenStream.Peek().Type == TokenType.DefaultEvent)
{
if (!parentNode.AddDeferredEvent(base.TokenStream.Peek()))
{
throw new ParsingException("Unexpected event identifier.",
new List<TokenType>());
}
expectsComma = true;
}
else if (base.TokenStream.Peek().Type == TokenType.Comma)
{
expectsComma = false;
}
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
}
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
internal void Visit(StateDeclaration parentNode)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.HaltEvent &&
base.TokenStream.Peek().Type != TokenType.DefaultEvent))
{
throw new ParsingException("Expected event identifier.",
new List<TokenType>
{
TokenType.Identifier,
TokenType.HaltEvent,
TokenType.DefaultEvent
});
}
var eventIdentifiers = new List<Token>();
bool expectsComma = false;
while (!base.TokenStream.Done &&
base.TokenStream.Peek().Type != TokenType.DoAction &&
base.TokenStream.Peek().Type != TokenType.GotoState &&
base.TokenStream.Peek().Type != TokenType.PushState)
{
if ((!expectsComma &&
base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.HaltEvent &&
base.TokenStream.Peek().Type != TokenType.DefaultEvent) ||
(expectsComma && base.TokenStream.Peek().Type != TokenType.Comma))
{
break;
}
if (base.TokenStream.Peek().Type == TokenType.Identifier ||
base.TokenStream.Peek().Type == TokenType.HaltEvent ||
base.TokenStream.Peek().Type == TokenType.DefaultEvent)
{
if (base.TokenStream.Peek().Type == TokenType.Identifier)
{
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.EventIdentifier));
}
eventIdentifiers.Add(base.TokenStream.Peek());
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
expectsComma = true;
}
else if (base.TokenStream.Peek().Type == TokenType.Comma)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
expectsComma = false;
}
}
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.DoAction &&
base.TokenStream.Peek().Type != TokenType.GotoState &&
base.TokenStream.Peek().Type != TokenType.PushState))
{
throw new ParsingException("Expected \"do\", \"goto\" or \"push\".",
new List<TokenType>
{
TokenType.DoAction,
TokenType.GotoState,
TokenType.PushState
});
}
if (base.TokenStream.Peek().Type == TokenType.DoAction)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket))
{
throw new ParsingException("Expected action identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
if (base.TokenStream.Peek().Type == TokenType.LeftCurlyBracket)
{
var blockNode = new BlockSyntax(base.TokenStream.Program,
parentNode.Machine, null, parentNode.IsModel);
new BlockSyntaxVisitor(base.TokenStream).Visit(blockNode);
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
foreach (var eventIdentifier in eventIdentifiers)
{
if (!parentNode.AddActionBinding(eventIdentifier, blockNode))
{
throw new ParsingException("Unexpected action handler.",
new List<TokenType>());
}
}
}
else
{
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.ActionIdentifier));
var actionIdentifier = base.TokenStream.Peek();
foreach (var eventIdentifier in eventIdentifiers)
{
if (!parentNode.AddActionBinding(eventIdentifier, actionIdentifier))
{
throw new ParsingException("Unexpected action handler.",
new List<TokenType>());
}
}
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
}
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
}
else if (base.TokenStream.Peek().Type == TokenType.GotoState)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Identifier)
{
throw new ParsingException("Expected state identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateIdentifier));
var stateIdentifier = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.WithExit &&
base.TokenStream.Peek().Type != TokenType.Semicolon))
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
if (base.TokenStream.Peek().Type == TokenType.WithExit)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket)
{
throw new ParsingException("Expected \"{\".",
new List<TokenType>
{
TokenType.LeftCurlyBracket
});
}
var blockNode = new BlockSyntax(base.TokenStream.Program, parentNode.Machine,
null, parentNode.IsModel);
new BlockSyntaxVisitor(base.TokenStream).Visit(blockNode);
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
foreach (var eventIdentifier in eventIdentifiers)
{
if (!parentNode.AddGotoStateTransition(eventIdentifier, stateIdentifier, blockNode))
{
throw new ParsingException("Unexpected goto state transition.",
new List<TokenType>());
}
}
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
}
else
{
foreach (var eventIdentifier in eventIdentifiers)
{
if (!parentNode.AddGotoStateTransition(eventIdentifier, stateIdentifier))
{
throw new ParsingException("Unexpected goto state transition.",
new List<TokenType>());
}
}
}
}
else if (base.TokenStream.Peek().Type == TokenType.PushState)
{
if (parentNode.Machine.IsMonitor)
{
throw new ParsingException("Monitors cannot \"push\".",
new List<TokenType>());
}
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Identifier)
{
throw new ParsingException("Expected state identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateIdentifier));
var stateIdentifier = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
foreach (var eventIdentifier in eventIdentifiers)
{
if (!parentNode.AddPushStateTransition(eventIdentifier, stateIdentifier))
{
throw new ParsingException("Unexpected push state transition.",
new List<TokenType>());
}
}
}
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
/// <param name="groupNode">Parent state group</param>
/// <param name="isStart">Is start state</param>
/// <param name="isHot">Is start state</param>
/// <param name="isCold">Is start state</param>
/// <param name="accMod">Access modifier</param>
internal void Visit(MachineDeclaration parentNode, StateGroupDeclaration groupNode,
bool isStart, bool isHot, bool isCold, AccessModifier accMod)
{
var node = new StateDeclaration(base.TokenStream.Program, parentNode,
groupNode, isStart, isHot, isCold);
node.AccessModifier = accMod;
node.StateKeyword = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Identifier)
{
throw new ParsingException("Expected state identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateIdentifier));
node.Identifier = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket)
{
throw new ParsingException("Expected \"{\".",
new List<TokenType>
{
TokenType.LeftCurlyBracket
});
}
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.StateLeftCurlyBracket));
node.LeftCurlyBracketToken = base.TokenStream.Peek();
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Program is PSharpProgram)
{
this.VisitNextPSharpIntraStateDeclaration(node);
}
else
{
this.VisitNextPIntraStateDeclaration(node);
}
// Insert into (immediately) containing group or machine declaration.
if (groupNode != null)
{
groupNode.StateDeclarations.Add(node);
}
else
{
parentNode.StateDeclarations.Add(node);
}
}
/// <summary>
/// Visits the syntax node.
/// </summary>
/// <param name="parentNode">Node</param>
internal void Visit(StateDeclaration parentNode)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.HaltEvent &&
base.TokenStream.Peek().Type != TokenType.DefaultEvent))
{
throw new ParsingException("Expected event identifier.",
new List<TokenType>
{
TokenType.Identifier,
TokenType.HaltEvent,
TokenType.DefaultEvent
});
}
var nameVisitor = new NameVisitor(base.TokenStream);
// Consumes multiple generic event names.
var eventIdentifiers =
nameVisitor.ConsumeMultipleNames(TokenType.EventIdentifier,
tt => nameVisitor.ConsumeGenericEventName(tt));
if (!base.TokenStream.Done &&
base.TokenStream.Peek().Type == TokenType.Identifier)
{
throw new ParsingException("Expected \",\".",
new List<TokenType>
{
TokenType.Comma
});
}
if (!base.TokenStream.Done &&
(base.TokenStream.Peek().Type == TokenType.LeftAngleBracket ||
base.TokenStream.Peek().Type == TokenType.RightAngleBracket))
{
throw new ParsingException("Invalid generic expression.",
new List<TokenType> { });
}
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.DoAction &&
base.TokenStream.Peek().Type != TokenType.GotoState &&
base.TokenStream.Peek().Type != TokenType.PushState))
{
throw new ParsingException("Expected \"do\", \"goto\" or \"push\".",
new List<TokenType>
{
TokenType.DoAction,
TokenType.GotoState,
TokenType.PushState
});
}
var resolvedEventIdentifiers = new Dictionary<Token, List<Token>>();
foreach (var eventIdentifier in eventIdentifiers)
{
if (eventIdentifier.Count == 1)
{
// We don't want to collapse halt and default
// events to event identifiers.
resolvedEventIdentifiers.Add(eventIdentifier[0], eventIdentifier);
}
else
{
var identifierBuilder = new StringBuilder();
foreach (var token in eventIdentifier)
{
identifierBuilder.Append(token.TextUnit.Text);
}
TextUnit textUnit = new TextUnit(identifierBuilder.ToString(),
eventIdentifier[0].TextUnit.Line);
resolvedEventIdentifiers.Add(new Token(textUnit, TokenType.EventIdentifier),
eventIdentifier);
}
}
if (base.TokenStream.Peek().Type == TokenType.DoAction)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.Identifier &&
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket))
{
throw new ParsingException("Expected action identifier.",
new List<TokenType>
{
TokenType.Identifier
});
}
if (base.TokenStream.Peek().Type == TokenType.LeftCurlyBracket)
{
var blockNode = new BlockSyntax(base.TokenStream.Program,
parentNode.Machine, null);
new BlockSyntaxVisitor(base.TokenStream).Visit(blockNode);
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddActionBinding(kvp.Key, kvp.Value, blockNode))
{
throw new ParsingException("Unexpected action handler.",
new List<TokenType>());
}
}
}
else
{
base.TokenStream.Swap(new Token(base.TokenStream.Peek().TextUnit,
TokenType.ActionIdentifier));
var actionIdentifier = base.TokenStream.Peek();
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddActionBinding(kvp.Key, kvp.Value, actionIdentifier))
{
throw new ParsingException("Unexpected action handler.",
new List<TokenType>());
}
}
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
}
}
else if (base.TokenStream.Peek().Type == TokenType.GotoState)
{
var stateIdentifiers = this.ConsumeState();
if (base.TokenStream.Done ||
(base.TokenStream.Peek().Type != TokenType.WithExit &&
base.TokenStream.Peek().Type != TokenType.Semicolon))
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
if (base.TokenStream.Peek().Type == TokenType.WithExit)
{
base.TokenStream.Index++;
base.TokenStream.SkipWhiteSpaceAndCommentTokens();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.LeftCurlyBracket)
{
throw new ParsingException("Expected \"{\".",
new List<TokenType>
{
TokenType.LeftCurlyBracket
});
}
var blockNode = new BlockSyntax(base.TokenStream.Program, parentNode.Machine, null);
new BlockSyntaxVisitor(base.TokenStream).Visit(blockNode);
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddGotoStateTransition(kvp.Key, kvp.Value, stateIdentifiers, blockNode))
{
throw new ParsingException("Unexpected goto state transition.",
new List<TokenType>());
}
}
}
else
{
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddGotoStateTransition(kvp.Key, kvp.Value, stateIdentifiers))
{
throw new ParsingException("Unexpected goto state transition.",
new List<TokenType>());
}
}
}
}
else if (base.TokenStream.Peek().Type == TokenType.PushState)
{
if (parentNode.Machine.IsMonitor)
{
throw new ParsingException("Monitors cannot \"push\".",
new List<TokenType>());
}
var stateIdentifiers = this.ConsumeState();
if (base.TokenStream.Done ||
base.TokenStream.Peek().Type != TokenType.Semicolon)
{
throw new ParsingException("Expected \";\".",
new List<TokenType>
{
TokenType.Semicolon
});
}
foreach (var kvp in resolvedEventIdentifiers)
{
if (!parentNode.AddPushStateTransition(kvp.Key, kvp.Value, stateIdentifiers))
{
throw new ParsingException("Unexpected push state transition.",
new List<TokenType>());
}
}
}
}