Model:
    models += ModelDeclaration*
;

ModelDeclaration:
    InterfaceDeclaration | ComponentDeclaration
;

InterfaceDeclaration:
    'interface' 
    name = ID 
    CURLYBRACKET_OPEN
    eventDecls += EventDeclaration 
    CURLYBRACKET_CLOSE
;

EventDeclaration:
    name = ID 
    SEMICOLON
;


ComponentDeclaration:
    'component'
    name = ID
    CURLYBRACKET_OPEN
    (ports += PortDeclaration)*
    (behaviour = BehaviourDeclaration)
    CURLYBRACKET_CLOSE
;

PortDeclaration:
    names = [InterfaceDeclaration]
    name = ID
    SEMICOLON
;


BehaviourDeclaration:
    'behaviour'
    CURLYBRACKET_OPEN
    stats += BehaviourStatement
    my = CURLYBRACKET_CLOSE
;

BehaviourStatement:
    CompoundBehaviourStatement
  | ActionStatement
  | ReplyStatement
;

CompoundBehaviourStatement:
    {CompoundBehaviourStatement}
    CURLYBRACKET_OPEN
    (stats += BehaviourStatement)*
    CURLYBRACKET_CLOSE
;

ActionStatement:
    port = [PortDeclaration] '.' action = [EventDeclaration]
    SEMICOLON
;


ReplyStatement:
    (port = [PortDeclaration] DOT)?
    actionReply = 'reply'
    SEMICOLON
;

CURLYBRACKET_OPEN : '{';
CURLYBRACKET_CLOSE : '}';
SEMICOLON : ';';
DOT : '.';

	override completeActionStatement_Action(EObject model, Assignment assignment, ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		if (model instanceof ActionStatement) {
			var port = (model as ActionStatement).port
			port = port;
		}
		else {
			logger.error("Help; how to access port field?")					
		}
		super.completeActionStatement_Action(model, assignment, context, acceptor)
	}

interface I {
	e;
}

component C {
	I p;
	I r;
	behaviour {
		{ p.}      // content assist after "p." does not work as expected; how to access port field?
	}
}

interface I {
	e;
}

component C {
	I p;
	I r;
	behaviour {
		{ p.e; p.}      // content assist after "p." does work as expected
	}
}