public static void parse(Token routineName, bool hidden, bool final, bool isOverride, int pure_safe, iSCOPE context)
{
ROUTINE routine = null;
if (routineName.code == TokenCode.Init)
{
Debug.Indent();
Debug.WriteLine("Entering INITIALIZER.parse");
routine = new INITIALIZER();
goto Init;
}
Debug.Indent();
Debug.WriteLine("Entering ROUTINE.parse (" + routineName.image + ")");
string image = routineName.image;
Token token = get(); // What's after the routine name?
switch (routineName.image)
{
case "and":
if (token.code == TokenCode.Then)
{
forget();
image += " then";
Span span = new Span(routineName.span, token.span);
routineName = new Token(span, TokenCode.Identifier, image, new Category(CategoryCode.identifier));
}
break;
case "or":
token = get();
if (token.code == TokenCode.Else)
{
forget();
image += " else";
Span span = new Span(routineName.span, token.span);
routineName = new Token(span, TokenCode.Identifier, image, new Category(CategoryCode.identifier));
}
break;
}
routine = new ROUTINE(pure_safe, isOverride, routineName);
Init:
routine.setSpecs(hidden, final);
Context.enter(routine);
if (routineName.code == TokenCode.Init)
{
goto Init2;
}
token = get();
if (token.code == TokenCode.Alias)
{
forget();
token = expect(TokenCode.Identifier);
routine.alias = new IDENTIFIER(token.image);
}
if (token.code == TokenCode.LBracket)
{
// Generic routine
forget();
while (true)
{
var generic = FORMAL_GENERIC.parse(context);
routine.add(generic);
token = get();
switch (token.code)
{
case TokenCode.Comma:
case TokenCode.Semicolon: forget(); continue;
case TokenCode.RBracket: forget(); goto Finish;
default: { /* Syntax error */ break; }
}
}
Finish:
;
}
Init2:
token = get();
if (token.code == TokenCode.LParen)
{
forget(); token = get();
if (token.code == TokenCode.RParen)
{
// Empty parameter list
forget();
goto Weiter;
}
while (true)
{
VARIABLE.parse(false, false, false, false, null, null, routine);
token = get();
if (token.code == TokenCode.Comma)
{
forget(); continue;
}
if (token.code == TokenCode.Semicolon)
{
forget(); continue;
}
break;
}
expect(TokenCode.RParen);
}
Weiter:
token = get();
if (token.code == TokenCode.Colon)
{
forget();
bool ref_val, conc; // TEMP SOLUTION
Span span2;
routine.type = VARIABLE.parseTypeSpecifier(routine, out ref_val, out conc, out span2);
if (routine.type != null)
{
routine.type.parent = routine;
routine.type.setSpan(span2);
}
}
token = get();
if (token.code == TokenCode.Require)
{
forget(); token = get();
if (token.code == TokenCode.Else)
{
forget(); routine.requireElse = true;
}
while (true)
{
EXPRESSION precondition = EXPRESSION.parse(null, routine);
routine.addPre(precondition);
precondition.parent = routine;
token = get();
if (token.code == TokenCode.Is || token.code == TokenCode.Arrow)
{
break;
}
}
}
if (token.code == TokenCode.Arrow)
{
forget();
BODY body = new BODY();
routine.routineBody = body;
body.parent = routine;
Context.enter(body);
EXPRESSION expression = EXPRESSION.parse(null, body);
RETURN ret = new RETURN(expression);
expression.parent = ret;
ret.setSpan(expression.span);
ret.parent = body;
body.add(ret);
body.setSpan(ret.span);
Context.exit();
}
else if (token.code == TokenCode.Is)
{
forget(); token = get();
if (token.code == TokenCode.Abstract)
{
forget();
routine.isAbstract = true;
}
else if (token.code == TokenCode.Foreign)
{
forget();
routine.isForeign = true;
}
else
{
BODY body = new BODY();
body.parent = routine;
routine.routineBody = body;
Context.enter(body);
BODY.parse(TokenCode.End, TokenCode.Ensure, TokenCode.ERROR, body);
Context.exit();
}
token = get();
if (token.code == TokenCode.Ensure)
{
forget();
token = get();
if (token.code == TokenCode.Then)
{
forget(); routine.ensureThen = true;
}
ENTITY.weAreWithinEnsure = true;
while (true)
{
EXPRESSION postcondition = EXPRESSION.parse(null, routine);
routine.addPre(postcondition);
postcondition.parent = routine;
token = get();
if (token.code == TokenCode.End)
{
forget(); break;
}
}
ENTITY.weAreWithinEnsure = false;
}
else if (!routine.isAbstract && !routine.isForeign)
{
expect(TokenCode.End);
}
}
token = get();
if (token.code == TokenCode.Semicolon)
{
forget();
}
Context.exit();
context.add(routine);
routine.parent = context.self;
routine.setSpan(routineName, token);
if (routineName.code == TokenCode.Init)
{
Debug.WriteLine("Exiting INITIALIZER.parse");
}
else
{
Debug.WriteLine("Exiting ROUTINE.parse");
}
Debug.Unindent();
}
/// <summary>
///
/// </summary>
/// <syntax>
/// Объявление-контейнера
/// : [ Спецификатор-контейнера ] unit Имя-контейнера [ FormalGenerics ]
/// { Директива-контейнера }
/// is
/// Тело-контейнера
/// [ invariant Список-предикатов ]
/// end
///
/// Спецификатор-контейнера
/// : ref | val | concurrent | abstract
///
/// Имя-контейнера
/// : Составное-имя
///
/// Директива-контейнера
/// : Директива-наследования
/// | Директива-использования
///
/// Директива-наследования
/// : extend Базовый-контейнер { , Базовый-контейнер }
///
/// Базовый-контейнер
/// : [ ~ ] UnitTypeName
///
/// Тело-контейнера
/// : { Объявление }
/// </syntax>
/// <returns></returns>
public static void parse(bool hidden, bool final, bool abstr, iSCOPE context)
{
Debug.Indent();
Debug.WriteLine("Entering UNIT.parse");
bool ref_val = false; // unit is reference by default
bool concurrent = false;
UNIT unit = null;
Token token = get();
Token begin = token;
TokenCode code = TokenCode.Unit;
switch (token.code)
{
case TokenCode.Ref:
ref_val = true;
forget();
code = getUnitKeyword();
break;
case TokenCode.Val:
ref_val = false;
forget();
code = getUnitKeyword();
break;
case TokenCode.Abstract:
abstr = true;
forget();
code = getUnitKeyword();
break;
case TokenCode.Concurrent:
concurrent = true;
forget();
code = getUnitKeyword();
break;
case TokenCode.Unit:
code = TokenCode.Unit;
forget();
break;
case TokenCode.Package:
code = TokenCode.Package;
forget();
break;
}
// 1. Unit header
token = expect(TokenCode.Identifier);
Token compoundName = IDENTIFIER.parseCompoundName(token);
if (code == TokenCode.Package)
{
if (!ENTITY.options.optConfig)
{
warning(token, "no-config");
unit = new UNIT(compoundName.image, ref_val, abstr, concurrent);
}
else
{
unit = new PACKAGE(compoundName.image, ref_val, abstr, concurrent);
}
}
else
{
unit = new UNIT(compoundName.image, ref_val, abstr, concurrent);
}
Debug.WriteLine("======================" + compoundName.image);
unit.parent = context.self;
unit.setSpecs(hidden, final);
Context.enter(unit);
// 2. Generic parameters
token = get();
if (token.code == TokenCode.LBracket)
{
forget();
while (true)
{
var generic = FORMAL_GENERIC.parse(unit);
unit.add(generic);
token = get();
switch (token.code)
{
case TokenCode.Comma:
case TokenCode.Semicolon: forget(); continue;
case TokenCode.RBracket: forget(); goto Finish;
default: { /* Syntax error */ break; }
}
}
Finish:
;
}
// Possible unit alias
token = get();
if (token.code == TokenCode.Alias)
{
forget();
token = expect(TokenCode.Identifier);
unit.alias = new IDENTIFIER(token);
}
// 3. Unit directives: inheritance
token = get();
if (token.code == TokenCode.Extend)
{
forget();
while (true)
{
PARENT parent = PARENT.parse(unit);
if (parent == null) /* Syntax error */ break {
;
}
unit.add(parent);
token = get();
switch (token.code)
{
case TokenCode.Comma:
case TokenCode.Semicolon:
case TokenCode.EOL:
forget();
continue;
default:
goto Use;
}
}
}