public override void visit(foreach_stmt _foreach_stmt)
{
prepare_node(_foreach_stmt.identifier, "identifier");
prepare_node(_foreach_stmt.type_name, "type_name");
prepare_node(_foreach_stmt.in_what, "in_what");
prepare_node(_foreach_stmt.stmt, "stmt");
}
private void ForeachCheckAndConvert(foreach_stmt _foreach_stmt, out expression_node foreachCollection,
out var_definition_node foreachVariable)
{
var lambdaSearcher = new LambdaSearcher(_foreach_stmt.in_what);
if (lambdaSearcher.CheckIfContainsLambdas())
{
AddError(new LambdasNotAllowedInForeachInWhatSatetement(get_location(lambdaSearcher.FoundLambda)));
}
foreachCollection = convert_strong(_foreach_stmt.in_what);
expression_node tmp = convert_if_typed_expression_to_function_call(foreachCollection);
if (tmp.type != null)
{
foreachCollection = tmp;
}
bool sys_coll_ienum; // true означает, что мы нашли тип object у интерфейса System.Collections.IEnumerable
type_node elem_type = null;
if (!FindIEnumerableElementType(foreachCollection.type, ref elem_type, out sys_coll_ienum))
{
AddError(foreachCollection.location, "CAN_NOT_EXECUTE_FOREACH_BY_EXPR_OF_TYPE_{0}", foreachCollection.type.name);
}
CheckToEmbeddedStatementCannotBeADeclaration(_foreach_stmt.stmt);
foreachVariable = FindForeachVariable(_foreach_stmt, elem_type, sys_coll_ienum);
}
public override void visit(foreach_stmt frch)
{
if (frch.type_name != null)
{
CheckVariableAlreadyDefined(frch.identifier);
}
base.visit(frch);
}
public override void visit(yield_sequence_node yn)
{
var id = NewVarName();
id.source_context = yn.source_context;
var fe = new foreach_stmt(id, new no_type_foreach(), yn.ex, new yield_node(id, yn.source_context), yn.source_context);
ReplaceStatement(yn, fe);
}
public override void visit(foreach_stmt _foreach_stmt)
{
AddPossibleComments(_foreach_stmt, true, false);
_foreach_stmt.identifier.visit(this);
if (_foreach_stmt.type_name != null)
{
_foreach_stmt.type_name.visit(this);
}
_foreach_stmt.in_what.visit(this);
_foreach_stmt.stmt.visit(this);
}
private var_definition_node FindForeachVariable(foreach_stmt _foreach_stmt, type_node elem_type, bool sys_coll_ienum)
{
var_definition_node foreachVariable = null;
if (_foreach_stmt.type_name == null) // значит, переменная определена в другом месте
{
location loc1 = get_location(_foreach_stmt.identifier);
definition_node dn = context.check_name_node_type(_foreach_stmt.identifier.name, loc1,
general_node_type.variable_node);
foreachVariable = (var_definition_node)dn;
if (!check_name_in_current_scope(_foreach_stmt.identifier.name))
{
AddError(loc1, "FOREACH_LOOP_CONTROL_MUST_BE_SIMPLE_LOCAL_VARIABLE");
}
}
else
{
foreachVariable = context.add_var_definition(_foreach_stmt.identifier.name,
get_location(_foreach_stmt.identifier));
type_node tn;
if (_foreach_stmt.type_name is no_type_foreach) // значит, это for var x in a
{
tn = elem_type;
}
else // значит, это for var x: T in a
{
tn = convert_strong(_foreach_stmt.type_name);
check_for_type_allowed(tn, get_location(_foreach_stmt.type_name));
check_using_static_class(tn, get_location(_foreach_stmt.type_name));
}
if (tn.is_value_type && !tn.is_standard_type)
{
context.close_var_definition_list(tn, new default_operator_node(tn, foreachVariable.location));
}
else
{
context.close_var_definition_list(tn, null);
}
}
if (/*!(foreachVariable.type is compiled_generic_instance_type_node) &&*/ !sys_coll_ienum) // SSM 16.09.18 - закомментировал это ограничение для фиксации бага #1184
{
convertion_data_and_alghoritms.check_convert_type_with_inheritance(elem_type, foreachVariable.type,
get_location(_foreach_stmt.identifier));
}
return(foreachVariable);
}
public override void visit(foreach_stmt fe)
{
if (fe.in_what.DescendantNodes().OfType <function_lambda_definition>().Count() > 0)
{
var id = GenIdentName();
id.Parent = fe;
var ass = new var_statement(id, fe.in_what, fe.in_what.source_context);
fe.in_what = id;
var l = new List <statement> {
ass, fe
};
ReplaceStatement(fe, l);
}
base.visit(fe);
}
public override void visit(foreach_stmt fe)
{
//if (fe.DescendantNodes().OfType<function_lambda_definition>().Count() > 0) // из-за #1984 убрал вообще условие. Пусть будет всегда
{
var id = GenIdentName();
id.Parent = fe;
var ass = new var_statement(id, fe.in_what, fe.in_what.source_context);
id.source_context = fe.in_what.source_context;
fe.in_what = id;
var l = new List <statement> {
ass, fe
};
//ReplaceStatement(fe, l);
ReplaceStatementUsingParent(fe, l);
}
base.visit(fe);
}
public override void visit(foreach_stmt _foreach_stmt)
{
statements_list sl2 = new statements_list(get_location(_foreach_stmt));
convertion_data_and_alghoritms.statement_list_stack_push(sl2);
expression_node foreachCollection;
var_definition_node foreachVariable;
ForeachCheckAndConvert(_foreach_stmt, out foreachCollection, out foreachVariable);
// SSM 29.07.16 - если in_what - одномерный массив, то заменить код foreach на for
// if (OptimizeForeachInCase1DArray(_foreach_stmt, foreachCollection)) return;
statements_list sl = new statements_list(get_location(_foreach_stmt.stmt));
convertion_data_and_alghoritms.statement_list_stack_push(sl);
foreach_node foreachNode = new foreach_node(foreachVariable, foreachCollection, null, get_location(_foreach_stmt));
context.cycle_stack.push(foreachNode);
context.loop_var_stack.Push(foreachVariable);
context.enter_code_block_with_bind();
statement_node body = convert_strong(_foreach_stmt.stmt);
context.leave_code_block();
context.loop_var_stack.Pop();
context.cycle_stack.pop();
sl = convertion_data_and_alghoritms.statement_list_stack.pop();
if (sl.statements.Count > 0 || sl.local_variables.Count > 0)
{
sl.statements.AddElement(body);
body = sl;
}
foreachNode.what_do = body;
convertion_data_and_alghoritms.statement_list_stack.pop();
sl2.statements.AddElement(foreachNode);
return_value(sl2);
}
private var_definition_node FindForeachVariable(foreach_stmt _foreach_stmt, type_node elem_type, bool sys_coll_ienum)
{
var_definition_node foreachVariable = null;
if (_foreach_stmt.type_name == null) // значит, переменная определена в другом месте
{
location loc1 = get_location(_foreach_stmt.identifier);
definition_node dn = context.check_name_node_type(_foreach_stmt.identifier.name, loc1,
general_node_type.variable_node);
foreachVariable = (var_definition_node)dn;
if (!check_name_in_current_scope(_foreach_stmt.identifier.name))
{
AddError(loc1, "FOREACH_LOOP_CONTROL_MUST_BE_SIMPLE_LOCAL_VARIABLE");
}
}
else
{
foreachVariable = context.add_var_definition(_foreach_stmt.identifier.name,
get_location(_foreach_stmt.identifier));
type_node tn;
if (_foreach_stmt.type_name is no_type_foreach) // значит, это for var x in a
{
tn = elem_type;
}
else // значит, это for var x: T in a
{
tn = convert_strong(_foreach_stmt.type_name);
check_for_type_allowed(tn, get_location(_foreach_stmt.type_name));
}
context.close_var_definition_list(tn, null);
}
if (!(foreachVariable.type is compiled_generic_instance_type_node) && !sys_coll_ienum)
{
convertion_data_and_alghoritms.check_convert_type_with_inheritance(elem_type, foreachVariable.type,
get_location(_foreach_stmt.identifier));
}
return(foreachVariable);
}
public override void visit(foreach_stmt _foreach_stmt)
{
executer.visit(_foreach_stmt);
if (_foreach_stmt.identifier != null)
this.visit((dynamic)_foreach_stmt.identifier);
if (_foreach_stmt.type_name != null)
this.visit((dynamic)_foreach_stmt.type_name);
if (_foreach_stmt.in_what != null)
this.visit((dynamic)_foreach_stmt.in_what);
if (_foreach_stmt.stmt != null)
this.visit((dynamic)_foreach_stmt.stmt);
if (_foreach_stmt.attributes != null)
this.visit((dynamic)_foreach_stmt.attributes);
}
/// <summary>
/// Преобразует foreach в for, если коллекция это одномерный массив.
/// </summary>
/// <param name="_foreach_stmt"></param>
/// <param name="in_what"></param>
/// <returns>True - если преобразование удалось, иначе False</returns>
private bool OptimizeForeachInCase1DArray(foreach_stmt _foreach_stmt, expression_node in_what)
{
var is1dimdynarr = false;
var comptn = in_what.type as compiled_type_node;
if (comptn != null && comptn.type_special_kind == type_special_kind.array_kind && comptn.rank == 1)
{
is1dimdynarr = true;
}
if (!is1dimdynarr)
{
var comtn = in_what.type as common_type_node;
if (comtn != null && comtn.internal_type_special_kind == type_special_kind.array_kind &&
comtn.rank == 1)
{
is1dimdynarr = true;
}
}
// SSM 23.08.16 Закомментировал оптимизацию. Не работает с лямбдами. Лямбды обходят старое дерево. А заменить foreach на for на этом этапе пока не получается - не развита инфраструктура
if (is1dimdynarr) // Замена foreach на for для массива
{
// сгенерировать код для for и вызвать соответствующий visit
var arrid = GenIdentName();
//var vdarr = new var_statement(arrid, new semantic_addr_value(in_what)); // semantic_addr_value - перевод в синтаксис для мгновенного вычисления семантического выражения, которое уже вычислено в in_what
var vdarr = new var_statement(arrid, _foreach_stmt.in_what);
var i = GenIdentName();
var x = _foreach_stmt.identifier;
// Возможны 3 случая:
// 1. _foreach_stmt.type_name = null - значит, переменная определена в другом месте
// 2. _foreach_stmt.type_name = no_type_foreach - значит, это for var x in a
// 3. _foreach_stmt.type_name = T - значит, это for var x: T in a
statement vd;
if (_foreach_stmt.type_name == null) // 1.
{
vd = new assign(x, arrid.indexer(i));
}
else if (_foreach_stmt.type_name is no_type_foreach) // 2.
{
vd = new var_statement(x, arrid.indexer(i));
}
else // 3.
{
vd = new var_statement(x, _foreach_stmt.type_name, arrid.indexer(i));
}
// Превратить старое тело в statement_list и добавить к нему в начало x := a[i] или var x := a[i]
var newbody = _foreach_stmt.stmt.ToStatementList();
newbody.AddFirst(vd);
var high = arrid.dot_node("Length").Minus(1);
var fornode = new for_node(i, 0, high, newbody, for_cycle_type.to, null, null, true);
var stl = new statement_list(vdarr, fornode);
// Замена 1 оператора на 1 оператор. Всё хорошо даже если оператор помечен меткой
ReplaceUsingParent(_foreach_stmt, stl);
visit(stl);
//visit(vdarr);
//visit(fornode);
return(true);
}
/// SSM 29.07.16
return(false);
}
public override void visit(foreach_stmt _foreach_stmt)
{
}
public override void visit(foreach_stmt _foreach_stmt)
{
var loopIdentName = _foreach_stmt.identifier.name.ToLower();
definition_node dn = null;
var_definition_node vdn = null;
var sl2 = new statements_list(_visitor.get_location(_foreach_stmt));
_visitor.convertion_data_and_alghoritms.statement_list_stack_push(sl2);
var newTreeNode = new CapturedVariablesTreeNodeForEachScope(_currentTreeNode, sl2.Scope.ScopeNum, _foreach_stmt);
if (_currentTreeNode != null)
{
_currentTreeNode.ChildNodes.Add(newTreeNode);
}
_currentTreeNode = newTreeNode;
_scopesCapturedVarsNodesDictionary.Add(sl2.Scope.ScopeNum, _currentTreeNode);
var inWhat = _visitor.convert_strong(_foreach_stmt.in_what);
var tmp = inWhat;
if (inWhat is typed_expression)
{
inWhat = _visitor.convert_typed_expression_to_function_call(inWhat as typed_expression);
}
type_node elemType = null;
if (inWhat.type == null)
{
inWhat = tmp;
}
_visitor.FindIEnumerableElementType(/*_foreach_stmt, */ inWhat.type, ref elemType);
if (_foreach_stmt.type_name == null)
{
var loc1 = _visitor.get_location(_foreach_stmt.identifier);
dn = _visitor.context.check_name_node_type(loopIdentName, loc1, general_node_type.variable_node);
vdn = (var_definition_node)dn;
}
else
{
vdn = _visitor.context.add_var_definition(loopIdentName, _visitor.get_location(_foreach_stmt.identifier));
type_node tn;
if (_foreach_stmt.type_name is no_type_foreach)
{
tn = elemType;
}
else
{
tn = _visitor.convert_strong(_foreach_stmt.type_name);
_visitor.check_for_type_allowed(tn, _visitor.get_location(_foreach_stmt.type_name));
}
_visitor.context.close_var_definition_list(tn, null);
_currentTreeNode.VariablesDefinedInScope.Add(new CapturedVariablesTreeNode.CapturedSymbolInfo(_foreach_stmt, _visitor.context.find(loopIdentName)));
}
newTreeNode.SymbolInfoLoopVar = _visitor.context.find(loopIdentName);
if (!(vdn.type is compiled_generic_instance_type_node))
{
_visitor.convertion_data_and_alghoritms.check_convert_type_with_inheritance(vdn.type, elemType, _visitor.get_location(_foreach_stmt.identifier));
}
var fn = new foreach_node(vdn, inWhat, null, _visitor.get_location(_foreach_stmt));
_visitor.context.cycle_stack.push(fn);
_visitor.context.loop_var_stack.Push(vdn);
ProcessNode(_foreach_stmt.in_what);
if (!(_foreach_stmt.stmt is statement_list))
{
var stmtList = new statement_list(_foreach_stmt.stmt, _foreach_stmt.stmt.source_context);
_foreach_stmt.stmt = stmtList;
}
ProcessNode(_foreach_stmt.stmt);
_visitor.context.loop_var_stack.Pop();
_visitor.convertion_data_and_alghoritms.statement_list_stack.pop();
_visitor.context.cycle_stack.pop();
_currentTreeNode = _currentTreeNode.ParentNode;
}
public virtual void visit(foreach_stmt _foreach_stmt)
{
DefaultVisit(_foreach_stmt);
}
public virtual void visit(foreach_stmt _foreach_stmt)
{
DefaultVisit(_foreach_stmt);
}
public virtual void visit(foreach_stmt _foreach_stmt)
{
}
public override void visit(foreach_stmt _foreach_stmt)
{
DefaultVisit(_foreach_stmt);
pre_do_visit(_foreach_stmt);
visit(foreach_stmt.identifier);
visit(foreach_stmt.type_name);
visit(foreach_stmt.in_what);
visit(foreach_stmt.stmt);
post_do_visit(_foreach_stmt);
}
public virtual void post_do_visit(foreach_stmt _foreach_stmt)
{
}
public override void visit(foreach_stmt fn)
{
ForeachCount++;
base.visit(fn);
}
// frninja 21/05/16
public override void visit(foreach_stmt frch)
{
// Полный код Loweringа c yield_unknown_foreach_type = integer
// var a: System.Collections.Generic.IEnumerable<integer>;
// a := l;
// var en := a.GetEnumerator();
// while en.MoveNext do
// begin
// var curr := en.Current; // var не нужно ставить если curr была описана раньше
// Print(curr);
// end;
///
// var a: System.Collections.Generic.IEnumerable<yield_unknown_foreach_type> := l;
var foreachCollIdent = this.NewForeachCollectionName();
var foreachCollType = new template_type_reference(new named_type_reference("System.Collections.Generic.IEnumerable"),
new template_param_list(new yield_unknown_foreach_type(frch)));
var foreachCollVarDef = new var_statement(foreachCollIdent, foreachCollType);
var ass = new assign(foreachCollIdent, frch.in_what);
// var en := a.GetEnumerator();
var enumeratorIdent = this.NewEnumeratorName();
var enumeratorVarDef = new var_statement(enumeratorIdent, new method_call(new dot_node(foreachCollIdent, new ident("GetEnumerator")), new expression_list()));
//var curr := en.Current;
// Переменная цикла foreach. Есть три варианта:
// 1. foreach x in l do -> curr := en.Current;
// 2. foreach var x in l do -> var curr := en.Current;
// 3. foreach var x: T in l do -> var curr: T := en.Current;
var currentIdent = frch.identifier;
statement st = null;
var curExpr = new dot_node(enumeratorIdent, "Current");
// С типом
if (frch.type_name == null) // 1. foreach x in l do -> curr := en.Current;
{
st = new assign(currentIdent, curExpr);
}
else if (frch.type_name is no_type_foreach) // 2. foreach var x in l do -> var curr := en.Current;
{
// Получаем служебное имя с $ и заменяем его в теле цикла
currentIdent = this.NewVarNames(frch.identifier).VarName;
var replacerVis = new ReplaceVariableNameVisitor(frch.identifier, currentIdent);
frch.visit(replacerVis);
st = new var_statement(currentIdent, curExpr);
}
else // 3. foreach var x: T in l do -> var curr: T := en.Current;
{
// Получаем служебное имя с $ и заменяем его в теле цикла
currentIdent = this.NewVarNames(frch.identifier).VarName;
var replacerVis = new ReplaceVariableNameVisitor(frch.identifier, currentIdent);
frch.visit(replacerVis);
st = new var_statement(currentIdent, frch.type_name, curExpr);
}
// Добавляем тело цикла в stl
var stl = new statement_list(st);
ProcessNode(frch.stmt); // для обработки вложенных конструкций
stl.Add(frch.stmt);
var whileNode = new while_node(new method_call(new dot_node(enumeratorIdent, "MoveNext"), new expression_list()),
stl,
WhileCycleType.While);
var sq = SeqStatements(foreachCollVarDef, ass, enumeratorVarDef, whileNode);
ReplaceStatement(frch, sq);
visit(whileNode); // Lowering оставшегося whileNode
}
public virtual void visit(foreach_stmt _foreach_stmt)
{
}
public override void visit(foreach_stmt _foreach_stmt)
{
// SSM 24.12.19 lambda_capture_foreach_counter.pas не проходит если откомментировать эти 2 строки
// Причина - лямбда уже начала разбираться
// Пробую сделать так: если foreach в лямбде, то оптимизация не делается, а если нет, то делается
// Пока не получилось - ошибка err0157.pas начинает быть правильной программой
// Надо как-то переменную x в стек context.loop_var_stack.Push(foreachVariable); помещать !!! Но не сейчас... (SSM 12.01.20)
/*syntax_tree_node p = _foreach_stmt;
* do
* {
* p = p.Parent;
* } while (!(p == null || p is procedure_definition || p is function_lambda_definition));
*
* if (!(p is function_lambda_definition)) // тогда оптимизируем
* {
* var feWhat = convert_strong(_foreach_stmt.in_what);
* if (OptimizeForeachInCase1DArray(_foreach_stmt, feWhat)) return;
* }*/
statements_list sl2 = new statements_list(get_location(_foreach_stmt));
convertion_data_and_alghoritms.statement_list_stack_push(sl2);
expression_node foreachCollection;
var_definition_node foreachVariable;
ForeachCheckAndConvert(_foreach_stmt, out foreachCollection, out foreachVariable);
// SSM 29.07.16 - если in_what - одномерный массив, то заменить код foreach на for
// if (OptimizeForeachInCase1DArray(_foreach_stmt, foreachCollection)) return;
statements_list sl = new statements_list(get_location(_foreach_stmt.stmt));
convertion_data_and_alghoritms.statement_list_stack_push(sl);
foreach_node foreachNode = new foreach_node(foreachVariable, foreachCollection, null, get_location(_foreach_stmt));
context.cycle_stack.push(foreachNode);
context.loop_var_stack.Push(foreachVariable);
context.enter_code_block_with_bind();
statement_node body = convert_strong(_foreach_stmt.stmt);
context.leave_code_block();
context.loop_var_stack.Pop();
context.cycle_stack.pop();
sl = convertion_data_and_alghoritms.statement_list_stack.pop();
if (sl.statements.Count > 0 || sl.local_variables.Count > 0)
{
sl.statements.AddElement(body);
body = sl;
}
foreachNode.what_do = body;
convertion_data_and_alghoritms.statement_list_stack.pop();
sl2.statements.AddElement(foreachNode);
return_value(sl2);
}