/// <summary>
/// Retrieves each element of an array with its key if any.
/// </summary>
/// <param name="array">An array or object.</param>
/// <returns>The current element.</returns>
public static IEnumerable LoopEach(object array)
{
if (array == null)
yield break;
var info = new LoopInfo { type = LoopType.Each };
loops.Push(info);
var type = array.GetType();
if (typeof(IDictionary).IsAssignableFrom(type))
{
var dictionary = (IDictionary)array;
foreach (var key in dictionary.Keys)
{
info.result = new[] { key, dictionary[key] };
info.index++;
yield return info.result;
}
}
else if (typeof(IEnumerable).IsAssignableFrom(type))
{
var enumerator = ((IEnumerable)array).GetEnumerator();
while (enumerator.MoveNext())
{
info.result = new[] { null, enumerator.Current };
info.index++;
yield return info.result;
}
}
loops.Pop();
}
private void SolvePuzzle2(IList <string> list)
{
List <Tuple <string, int> > commands = GetCommands(list);
List <Tuple <string, int> > workcopy;
LoopInfo li = new LoopInfo();
int testid = 0;
do
{
if (commands[testid].Item1 == "acc")
{
testid++;
continue;
}
workcopy = MakeCopyOfCommands(commands);
switch (workcopy[testid].Item1)
{
case "jmp": workcopy[testid] = new Tuple <string, int>("nop", workcopy[testid].Item2); break;
case "nop": workcopy[testid] = new Tuple <string, int>("jmp", workcopy[testid].Item2); break;
}
li = TestForLoop(workcopy);
testid++;
}while (li.IsLoop);
Helper.Logger.Log(Name, $"Acc: {li.Acc}");
}
public void onEndDrag(int endingNode)
{
if (!isValid)
{
Destroy(loops[endingNode]);
}
else
{
loopInfoBeingModified = loopInfos[endingNode];
loopInfoBeingModified.origin = 0;
float willSnapTo = maximumHeights[0];
for (int i = 0; i < maximumHeights.Length; i++)
{
if (topPosition > maximumHeights[i])
{
break;
}
willSnapTo = maximumHeights[i];
loopInfoBeingModified.origin = i;
}
topPosition = willSnapTo;
applyPositions();
loopInfos[endingNode].initialCurveY = arrowTransform.localPosition.y;
loopSizeMenu.SetActive(true);
}
resetAllCounts();
for (int i = 0; i < loopInfos.Length; i++)
{
if (loopInfos[i])
{
loopInfos[i].howManyAbove = countParentLoops(i, endingNode, loopInfos[i].origin);
loopInfos[i].howManyInside = countInnerLoops(i, endingNode, loopInfos[i].origin);
}
}
}
/// <summary>
/// Starts a new loop
/// </summary>
/// <param name="startIndex">The index on the string where the loop starts</param>
/// <param name="numIterations">The number of iterations of the loop</param>
public void StartLoop(int startIndex, int numIterations)
{
//If this loop is not started, start it, otherwise start the nested loop
if (this.startIndex == -1)
{
//Store start index and number of iterations
this.startIndex = startIndex;
this.numIterations = numIterations;
}
else
{
//If attempted to start nested loops when not allowed, throw exception
if (!allowNestedLoops)
{
throw new Exception("Nested loops are not allowed");
}
//If the nested loop has not been made, make it
if (nestedLoop == null)
{
nestedLoop = new LoopInfo();
}
//Start the nested loop
nestedLoop.StartLoop(startIndex, numIterations);
}
}
public void chooseAmount(int amount)
{
LoopInfo info = loopInfoBeingModified;
info.amount = amount;
loopSizeMenu.SetActive(false);
}
/// <summary>
/// Retrieves the lines in a text file, one at a time.
/// </summary>
/// <param name="input">The name of the text file whose contents will be read by the loop.</param>
/// <param name="output">The optional name of the file to be kept open for the duration of the loop.</param>
/// <returns></returns>
public static IEnumerable LoopRead(string input, string output)
{
if (!File.Exists(input))
{
yield break;
}
StreamWriter writer = null;
if (output == "*")
{
writer = new StreamWriter(Console.OpenStandardOutput());
}
else if (!string.IsNullOrEmpty(output))
{
bool binary = output[0] == '*';
if (binary)
{
output = output.Substring(1);
}
if (output.Length == 0 || !File.Exists(output))
{
yield break;
}
writer = new StreamWriter(File.OpenWrite(output));
if (binary)
{
writer.NewLine = "\n";
}
}
var info = new LoopInfo
{
type = LoopType.File
};
loops.Push(info);
var reader = File.OpenText(input);
string line;
while ((line = reader.ReadLine()) != null)
{
if (writer != null)
{
writer.WriteLine(line);
}
info.result = line;
info.index++;
yield return(line);
}
loops.Pop();
}
public bool IterateLoop(int count, ref int targetPos)
{
if (m_loops.Count > 0)
{
LoopInfo info = m_loops[m_loops.Count - 1];
if (info.Iterations == -1)
{
info.Iterations = count;
}
info.Iterations--;
if (info.Iterations <= 0)
{
m_loops.RemoveAt(m_loops.Count - 1);
return(false);
}
else
{
targetPos = info.LoopPos;
return(true);
}
}
else
{
return(false);
}
}
public LoopItem(Func <TModel, int, T> listFunc, HtmlHelper <TModel> htmlHelper, T item, LoopInfo loopInfo)
{
Item = item;
Info = loopInfo;
_listFunc = listFunc;
_htmlHelper = htmlHelper;
_currentIndexedExpression = loopInfo.CurrentExpression;
}
public LoopInfo Clamp(LoopInfo other)
{
LoopInfo newPack = new LoopInfo {
Left = Mathf.Max(Left, other.Left)
};
newPack.Length = Mathf.Min(Left + Length, other.Left + other.Length) - newPack.Left;
return(newPack);
}
public void recoverSize()
{
info = GetComponentInChildren <LoopInfo>();
if (info)
{
origin = info.origin;
loopSize = info.amount;
}
}
protected override void UpdateContents()
{
UpdatePageSize();
LoopInfo clampedRange = CalcViewRange();
if (clampedRange != viewRange)
{
UpdateViewRange(clampedRange.Left);
}
}
/// <summary>
/// Perform a series of commands repeatedly: either the specified number of times or until break is encountered.
/// </summary>
/// <param name="n">How many times (iterations) to perform the loop.</param>
/// <returns></returns>
public static IEnumerable Loop(int n)
{
var info = new LoopInfo { type = LoopType.Normal };
loops.Push(info);
for (int i = 0; i < n;)
{
info.index = i;
yield return ++i;
}
loops.Pop();
}
/// <summary>
/// Retrieves the contents of the specified registry subkey, one item at a time.
/// </summary>
/// <param name="root">Must be either HKEY_LOCAL_MACHINE (or HKLM), HKEY_USERS (or HKU), HKEY_CURRENT_USER (or HKCU), HKEY_CLASSES_ROOT (or HKCR), or HKEY_CURRENT_CONFIG (or HKCC).</param>
/// <param name="key">The name of the key (e.g. Software\SomeApplication). If blank or omitted, the contents of RootKey will be retrieved.</param>
/// <param name="subkeys">
/// <list>
/// <item><code>1</code> subkeys contained within Key are not retrieved (only the values);</item>
/// <item><code>1</code> all values and subkeys are retrieved;</item>
/// <item><code>2</code> only the subkeys are retrieved (not the values).</item>
/// </list>
/// </param>
/// <param name="recurse"><code>1</code> to recurse into subkeys, <code>0</code> otherwise.</param>
/// <returns></returns>
public static IEnumerable LoopRegistry(string root, string key, int subkeys, bool recurse)
{
var info = new LoopInfo {
type = LoopType.Registry
};
loops.Push(info);
loops.Pop();
yield break;
// TODO: registry loop
}
private LoopInfo CalcViewRange()
{
float curPos = CurDirectionPos - (TemplateDiv) * PreOutLook - Padding.y;
int scrollIndex = ScrollPosToScrollStep(curPos);
LoopInfo clampedRange = new LoopInfo
{
Left = scrollIndex + PageStepLen > ScrollSteps ? ScrollSteps - PageStepLen : scrollIndex
};
if (clampedRange.Left < 0)
{
clampedRange.Left = 0;
}
clampedRange.Length = PageStepLen;
return(clampedRange);
}
public void StartLoop(int pos)
{
foreach (var cur in m_loops)
{
if (cur.LoopPos == pos)
{
return;
}
}
LoopInfo info = new LoopInfo();
info.LoopPos = pos;
info.Iterations = -1;
m_loops.Add(info);
}
/// <summary>
/// Perform a series of commands repeatedly: either the specified number of times or until break is encountered.
/// </summary>
/// <param name="n">How many times (iterations) to perform the loop.</param>
/// <returns></returns>
public static IEnumerable Loop(int n)
{
var info = new LoopInfo {
type = LoopType.Normal
};
loops.Push(info);
for (int i = 0; i < n;)
{
info.index = i;
yield return(++i);
}
loops.Pop();
}
private void UpdateViewRange(int scrollStep)
{
LoopInfo target = new LoopInfo
{
Left = scrollStep,
Length = PageStepLen
};
int viewCount = Mathf.Min(ItemCount - target.Left * PageDiv, PageSize);
if (viewCount < 0)
{
viewCount = 0;
}
int deltaSize = viewCount - viewList.Count;
for (int i = 0; i < deltaSize; i++)
{
viewList.Add(null);
}
LoopInfo intersection = target.Clamp(viewRange);
int sstart = 0;
int scount = 0;
if (intersection.Length > 0)
{
sstart = Mathf.Max(0, target.GetOffset(intersection.Left) * PageDiv);
scount = Mathf.Min(intersection.Length * PageDiv, viewCount);
var sdir = target.GetOffset(viewRange.Left) * PageDiv;
MoveItems(viewList, sstart - sdir, scount, sdir);
}
for (int i = 0; i < -deltaSize; i++)
{
DisposeItem(viewList, viewList.Count - 1);
}
int a = sstart;
int b = a + scount - 1;
for (int i = 0; i < viewCount; i++)
{
if (i < a || i > b)
{
UpdateItem(viewList, i, OffsetByPage(target, i));
}
}
viewRange.Left = scrollStep;
viewRange.Length = PageStepLen;
}
//----- method -----
public override Playable CreatePlayable(PlayableGraph graph, GameObject owner)
{
var playable = ScriptPlayable <LoopBehaviour> .Create(graph);
var loopInfo = new LoopInfo(name)
{
Loop = true
};
var beheviour = playable.GetBehaviour();
beheviour.PlayableDirector = owner.GetComponent <PlayableDirector>();
beheviour.LoopInfo = loopInfo;
return(playable);
}
private LoopInfo TestForLoop(List <Tuple <string, int> > commands)
{
var retval = new LoopInfo()
{
IsLoop = true
};
bool[] commandhit = new bool[commands.Count];
int cmdN = 0;
while (true)
{
if (cmdN >= commands.Count)
{
retval.IsLoop = false;
break;
}
if (commandhit[cmdN])
{
break;
}
commandhit[cmdN] = true;
if (commands[cmdN].Item1 == "acc")
{
retval.Acc += commands[cmdN].Item2;
}
if (commands[cmdN].Item1 == "jmp")
{
cmdN += commands[cmdN].Item2;
}
else
{
cmdN++;
}
}
return(retval);
}
/// <summary>
/// Retrieves the specified files or folders, one at a time.
/// </summary>
/// <param name="pattern">The name of a single file or folder, or a wildcard pattern.</param>
/// <param name="folders">One of the following digits, or blank to use the default:
/// <list>
/// <item><code>1</code> (default) folders are not retrieved (only files);</item>
/// <item><code>1</code> all files and folders that match the wildcard pattern are retrieved;</item>
/// <item><code>2</code> only folders are retrieved (no files).</item>
/// </list>
/// </param>
/// <param name="recurse"><code>1</code> to recurse into subfolders, <code>0</code> otherwise.</param>
/// <returns></returns>
public static IEnumerable LoopFile(string pattern, int folders, bool recurse)
{
var info = new LoopInfo {
type = LoopType.Directory
};
loops.Push(info);
string[] list = Directory.GetFiles(pattern, string.Empty, recurse ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly);
foreach (var file in list)
{
info.result = file;
info.index++;
yield return(file);
}
loops.Pop();
}
/// <summary>
/// Retrieves each element of an array with its key if any.
/// </summary>
/// <param name="array">An array or object.</param>
/// <returns>The current element.</returns>
public static IEnumerable LoopEach(object array)
{
if (array == null)
{
yield break;
}
var info = new LoopInfo
{
type = LoopType.Each
};
loops.Push(info);
var type = array.GetType();
if (typeof(IDictionary).IsAssignableFrom(type))
{
var dictionary = (IDictionary)array;
foreach (var key in dictionary.Keys)
{
info.result = new[] { key, dictionary[key] };
info.index++;
yield return(info.result);
}
}
else if (typeof(IEnumerable).IsAssignableFrom(type))
{
var enumerator = ((IEnumerable)array).GetEnumerator();
while (enumerator.MoveNext())
{
info.result = new[] { null, enumerator.Current };
info.index++;
yield return(info.result);
}
}
loops.Pop();
}
} // Break
// Return a statement which associated the specified LoopInfo with
// an enclosing statement. This should be called for switch statements,
// and for any labeled statement which is not a loop statement.
public StmtFrag LabeledStmt(LoopInfo loopInfo, StmtFrag stmt)
{
CSharpLoopInfo csLoopInfo = (CSharpLoopInfo)loopInfo;
CSharpStmtFrag frag = new CSharpStmtFrag(csLoopInfo.loc);
frag.Append(stmt);
frag.Append("breakTarget_{0}: {1}", csLoopInfo.index + 1, "{}");
return frag;
} // LabeledStmt
public Instruction Next()
{
if (index >= Instructions.Count)
{
return(null);
}
currentInstruction = Instructions[index];
switch (currentInstruction.Type)
{
case InstructionType.Loop:
index++;
loopInfos.Push(new LoopInfo(index, (int)currentInstruction.Parameter));
return(Next());
case InstructionType.EndLoop:
LoopInfo currentLoop = loopInfos.Peek();
currentLoop.count--;
if (currentLoop.count == 0)
{
loopInfos.Pop();
index++;
}
else
{
index = currentLoop.index;
}
return(Next());
case InstructionType.Sync:
if (SyncLocked)
{
if (waitingForSync)
{
if (waitingForSyncIndex == SyncIndex)
{
return(currentInstruction);
}
else
{
waitingForSync = false;
index++;
return(Next());
}
}
else
{
SyncLocked = false;
waitingForSync = false;
index++;
return(Next());
}
}
else
{
if (waitingForSync)
{
waitingForSync = false;
index++;
return(Next());
}
else
{
SyncLocked = true;
SyncIndex++;
waitingForSync = true;
waitingForSyncIndex = SyncIndex;
return(currentInstruction);
}
}
}
if (stepIndex >= currentInstruction.StepCount)
{
index++;
stepIndex = 1;
}
else
{
stepIndex++;
}
return(currentInstruction);
}
/// <summary>
/// Retrieves substrings (fields) from a string, one at a time.
/// </summary>
/// <param name="input">The string to parse.</param>
/// <param name="delimiters">One of the following:
/// <list>
/// <item>the word <code>CSV</code> to parse in comma seperated value format;</item>
/// <item>a sequence of characters to treat as delimiters;</item>
/// <item>blank to parse each character of the string.</item>
/// </list>
/// </param>
/// <param name="omit">An optional list of characters (case sensitive) to exclude from the beginning and end of each substring.</param>
/// <returns></returns>
public static IEnumerable LoopParse(string input, string delimiters, string omit)
{
var info = new LoopInfo { type = LoopType.Parse };
loops.Push(info);
if (delimiters.ToLowerInvariant() == Keyword_CSV)
{
var reader = new StringReader(input);
var part = new StringBuilder();
bool str = false, next = false;
while (true)
{
int current = reader.Read();
if (current == -1)
goto collect;
const char tokenStr = '"', tokenDelim = ',';
var sym = (char)current;
switch (sym)
{
case tokenStr:
if (str)
{
if ((char)reader.Peek() == tokenStr)
{
part.Append(tokenStr);
reader.Read();
}
else
str = false;
}
else
{
if (next)
part.Append(tokenStr);
else
str = true;
}
break;
case tokenDelim:
if (str)
goto default;
goto collect; // sorry
default:
next = true;
part.Append(sym);
break;
}
continue;
collect:
next = false;
string result = part.ToString();
part.Length = 0;
info.result = result;
info.index++;
yield return result;
if (current == -1)
break;
}
} else {
string[] parts;
var remove = omit.ToCharArray();
if(string.IsNullOrEmpty(delimiters)) {
var chars = input.ToCharArray();
parts = new string[chars.Length];
for(int i=0; i < chars.Length; i++)
parts[i] = chars[i].ToString();
}else
parts = input.Split(delimiters.ToCharArray(), StringSplitOptions.None);
foreach (var part in parts)
{
var result = part.Trim(remove);
if(string.IsNullOrEmpty(result))
continue;
info.result = result;
info.index++;
yield return result;
}
}
loops.Pop();
}
/// <summary>
/// Retrieves the contents of the specified registry subkey, one item at a time.
/// </summary>
/// <param name="root">Must be either HKEY_LOCAL_MACHINE (or HKLM), HKEY_USERS (or HKU), HKEY_CURRENT_USER (or HKCU), HKEY_CLASSES_ROOT (or HKCR), or HKEY_CURRENT_CONFIG (or HKCC).</param>
/// <param name="key">The name of the key (e.g. Software\SomeApplication). If blank or omitted, the contents of RootKey will be retrieved.</param>
/// <param name="subkeys">
/// <list>
/// <item><code>1</code> subkeys contained within Key are not retrieved (only the values);</item>
/// <item><code>1</code> all values and subkeys are retrieved;</item>
/// <item><code>2</code> only the subkeys are retrieved (not the values).</item>
/// </list>
/// </param>
/// <param name="recurse"><code>1</code> to recurse into subkeys, <code>0</code> otherwise.</param>
/// <returns></returns>
public static IEnumerable LoopRegistry(string root, string key, int subkeys, bool recurse)
{
var info = new LoopInfo { type = LoopType.Registry };
loops.Push(info);
loops.Pop();
yield break;
// TODO: registry loop
}
} // For
// Return a for/in statement.
public StmtFrag ForIn( LoopInfo loopInfo, StmtFrag init,
ExprFrag lhs, ExprFrag rhs, StmtFrag body )
{
CSharpLoopInfo csLoopInfo = (CSharpLoopInfo)loopInfo;
// HACK snewman 8/15/01: implement for/in statements.
throw new ParseError( "For/In statements not yet implemented",
csLoopInfo.loc );
} // ForIn
private bool Equals(LoopInfo other)
{
return(Left == other.Left && Length == other.Length);
}
} // ParseForStatement
// Parse a Statement.
private StmtFrag ParseStatement(FunctionInfo info)
{
StringCollection labels = MatchLabelSet();
if (tok.TryMatchKeyword("do"))
{
LoopInfo loopInfo = gen.NewLoopInfo( curCGFuncInfo, tok.Prev().loc,
labels );
loops.Push(loopInfo);
StmtFrag body = ParseStatement(info);
tok.MatchKeyword("while");
tok.MatchOp("(");
ExprFrag condition = ParseExpression(info, true);
tok.MatchOp(")");
tok.MatchOp(";");
LoopInfo temp = (LoopInfo) loops.Pop();
Trace.Assert(temp == loopInfo);
return gen.DoWhile(loopInfo, body, condition);
}
else if (tok.TryMatchKeyword("while"))
{
LoopInfo loopInfo = gen.NewLoopInfo( curCGFuncInfo, tok.Prev().loc,
labels );
loops.Push(loopInfo);
tok.MatchOp("(");
ExprFrag condition = ParseExpression(info, true);
tok.MatchOp(")");
StmtFrag body = ParseStatement(info);
LoopInfo temp = (LoopInfo) loops.Pop();
Trace.Assert(temp == loopInfo);
return gen.WhileDo(loopInfo, condition, body);
}
else if (tok.TryMatchKeyword("for"))
return ParseForStatement(info, labels);
else
{
bool isSwitch = tok.PeekKeyword("switch");
LoopInfo labelInfo = null;
if (labels != null || isSwitch)
{
labelInfo = gen.NewLabeledStmtInfo( curCGFuncInfo, tok.Prev().loc,
labels, isSwitch );
loops.Push(labelInfo);
}
StmtFrag stmt;
if (tok.PeekOp("{"))
stmt = ParseBlock(info);
else if (tok.TryMatchKeyword("var"))
{
stmt = gen.NewStmtFrag(tok.Prev().loc);
do
{
string varName;
SrcLoc varLoc;
stmt.Append(ParseVariableDeclaration( info, true, out varName,
out varLoc ));
}
while (tok.TryMatchOp(","));
tok.MatchOp(";");
}
else if (tok.TryMatchOp(";"))
{
// EmptyStatement
stmt = gen.NewStmtFrag(tok.Prev().loc);
}
else if (tok.TryMatchKeyword("if"))
{
SrcLoc ifLoc = tok.Prev().loc;
tok.MatchOp("(");
ExprFrag condition = ParseExpression(info, true);
tok.MatchOp(")");
StmtFrag ifClause = ParseStatement(info);
StmtFrag elseClause = null;
if (tok.TryMatchKeyword("else"))
elseClause = ParseStatement(info);
stmt = gen.IfThenElse(ifLoc, condition, ifClause, elseClause);
}
else if (tok.TryMatchKeyword("continue"))
{
SrcLoc continueLoc = tok.Prev().loc;
// HACK snewman 8/7/01: the grammar (ContinueStatement) specifies
// "no LineTerminator here".
string id;
tok.TryMatchID(out id);
tok.MatchOp(";");
stmt = gen.Continue(continueLoc, id, CloneStack(loops));
}
else if (tok.TryMatchKeyword("break"))
{
SrcLoc breakLoc = tok.Prev().loc;
// HACK snewman 8/7/01: the grammar (BreakStatement) specifies
// "no LineTerminator here".
string id;
tok.TryMatchID(out id);
tok.MatchOp(";");
stmt = gen.Break(breakLoc, id, CloneStack(loops));
}
else if (tok.TryMatchKeyword("return"))
{
SrcLoc returnLoc = tok.Prev().loc;
// HACK snewman 8/7/01: the grammar (ReturnStatement) specifies
// "no LineTerminator here".
if (tok.TryMatchOp(";"))
stmt = gen.Return(returnLoc, null);
else
{
ExprFrag value = ParseExpression(info, true);
tok.MatchOp(";");
stmt = gen.Return(returnLoc, value);
}
}
else if (tok.TryMatchKeyword("with"))
{
SrcLoc withLoc = tok.Prev().loc;
tok.MatchOp("(");
ExprFrag value = ParseExpression(info, true);
tok.MatchOp(")");
WithInfo withInfo = gen.NewWithInfo(curCGFuncInfo, withLoc);
withs.Push(withInfo);
StmtFrag body = ParseStatement(info);
WithInfo temp = (WithInfo) withs.Pop();
Trace.Assert(temp == withInfo);
stmt = gen.With(withInfo, value, body);
}
else if (tok.TryMatchKeyword("switch"))
{
SrcLoc switchLoc = tok.Prev().loc;
SwitchInfo switchInfo = gen.NewSwitchInfo();
tok.MatchOp("(");
ExprFrag switchValue = ParseExpression(info, true);
tok.MatchOp(")");
tok.MatchOp("{");
while (!tok.TryMatchOp("}"))
{
ExprFrag caseValue;
if (tok.TryMatchKeyword("default"))
caseValue = null;
else
{
tok.MatchKeyword("case");
caseValue = ParseExpression(info, true);
}
StmtFrag clauseStmt = null;
tok.MatchOp(":");
while ( !tok.PeekOp("}") && !tok.PeekKeyword("case") &&
!tok.PeekKeyword("default") )
{
StmtFrag tempStmt = ParseStatement(info);
if (clauseStmt == null)
clauseStmt = tempStmt;
else
clauseStmt.Append(tempStmt);
}
switchInfo.AddCase(caseValue, clauseStmt);
}
stmt = gen.Switch(switchLoc, switchValue, switchInfo);
}
else if (tok.TryMatchKeyword("throw"))
{
SrcLoc throwLoc = tok.Prev().loc;
// HACK snewman 8/7/01: the grammar (ThrowStatement) specifies
// "no LineTerminator here".
ExprFrag value = ParseExpression(info, true);
tok.MatchOp(";");
stmt = gen.Throw(throwLoc, value);
}
else if (tok.TryMatchKeyword("try"))
{
SrcLoc tryLoc = tok.Prev().loc;
StmtFrag tryBody = ParseBlock(info);
String catchVar = null;
WithInfo catchWithInfo = null;
StmtFrag catchBody = null;
StmtFrag finallyBody = null;
if (tok.TryMatchKeyword("catch"))
{
SrcLoc catchLoc = tok.Prev().loc;
tok.MatchOp("(");
catchVar = tok.MatchID();
tok.MatchOp(")");
catchWithInfo = gen.NewWithInfo(curCGFuncInfo, catchLoc);
withs.Push(catchWithInfo);
catchBody = ParseBlock(info);
WithInfo temp = (WithInfo) withs.Pop();
Trace.Assert(temp == catchWithInfo);
}
if (tok.TryMatchKeyword("finally"))
finallyBody = ParseBlock(info);
stmt = gen.TryCatchFinally( tryLoc, tryBody, catchVar,
catchWithInfo, catchBody, finallyBody );
}
else
{
ExprFrag expr = ParseExpression(info, true);
tok.MatchOp(";");
stmt = gen.ExpressionStmt(expr);
}
if (labelInfo != null)
{
LoopInfo temp2 = (LoopInfo) loops.Pop();
Trace.Assert(temp2 == labelInfo);
stmt = gen.LabeledStmt(labelInfo, stmt);
}
return stmt;
}
} // ParseStatement
} // MatchLabelSet
// Parse a for statement. The caller should already have matched
// the "for" keyword.
private StmtFrag ParseForStatement(FunctionInfo info, StringCollection labels)
{
LoopInfo loopInfo = gen.NewLoopInfo(curCGFuncInfo, tok.Prev().loc, labels);
loops.Push(loopInfo);
// HACK snewman 8/13/01: need to review this section against the
// specific semantics for "for" statements, and especially for/in
// statements, in section 12.6 of the ECMA spec.
tok.MatchOp("(");
bool isIn; // True for for/in, false otherwise
StmtFrag init=null; // Initializer; used for both types of loop
ExprFrag cond=null; // Condition; only used for non-in loops
ExprFrag update=null; // Update step; only used for non-in loops
ExprFrag inLHS=null; // LHS expression where in loops put prop names
ExprFrag inRHS=null; // RHS object that in loops iterate over
if (tok.TryMatchKeyword("var"))
{
string varName;
SrcLoc varLoc;
init = ParseVariableDeclaration(info, false, out varName, out varLoc);
isIn = tok.TryMatchKeyword("in");
if (isIn)
inLHS = gen.IdentifierExpr( varLoc, varName, info,
CloneStack(withs) );
else
{
while (tok.TryMatchOp(","))
init.Append(ParseVariableDeclaration( info, false, out varName,
out varLoc ));
}
}
else
{
if (!tok.PeekOp(";"))
{
ExprFrag initExpr = ParseExpression(info, false, 99);
isIn = tok.TryMatchKeyword("in");
if (isIn)
inLHS = initExpr;
else
init = gen.ExpressionStmt(initExpr);
}
else
isIn = false;
}
if (isIn)
inRHS = ParseExpression(info, true);
else
{
tok.MatchOp(";");
if (!tok.PeekOp(";"))
cond = ParseExpression(info, true);
tok.MatchOp(";");
if (!tok.PeekOp(")"))
update = ParseExpression(info, true);
}
tok.MatchOp(")");
StmtFrag body = ParseStatement(info);
LoopInfo temp = (LoopInfo) loops.Pop();
Trace.Assert(temp == loopInfo);
if (isIn)
return gen.ForIn(loopInfo, init, inLHS, inRHS, body);
else
return gen.For(loopInfo, init, cond, update, body);
} // ParseForStatement
private void validate(Element el)
{
C.Nn(el);
switch (el)
{
case Declr d:
validate(d.Ident);
if (d.Exp != null)
{
validate(d.Exp);
}
break;
case Assign a:
validate(a.Exp);
validate(a.To);
break;
case Ident i:
break;
case Return r:
if (LoopStack.Count != 0)
{
LoopStack.Peek().HasReturn = true;
}
break;
case FnApply fna:
validate(fna.Fn);
foreach (var fnaa in fna.Arguments)
{
validate(fnaa);
}
break;
case Fn f:
foreach (var fp in f.Parameters)
{
validate(fp);
}
validate(f.Sequence);
break;
case When w:
validate(w.Test);
validate(w.Then);
if (w.Otherwise != null)
{
validate(w.Otherwise);
}
break;
case Loop l:
var loopInfo = new LoopInfo();
LoopStack.Push(loopInfo);
validate(l.Body);
if (!(loopInfo.HasBreak || loopInfo.HasReturn))
{
throw prog.RemarkList.ContinueOrReturnRequiredInLoop(l);
}
LoopStack.Pop();
break;
case Continue cont:
if (LoopStack.Count != 0)
{
LoopStack.Peek().HasContinue = true;
}
else
{
throw prog.RemarkList.ContinueOutsideLoop(cont);
}
break;
case Break brk:
if (LoopStack.Count != 0)
{
LoopStack.Peek().HasBreak = true;
}
else
{
throw prog.RemarkList.BreakOutsideLoop(brk);
}
break;
case ArrConstructor ae:
foreach (var aa in ae.Arguments)
{
validate(aa);
}
break;
case MemberAccess ma:
validate(ma.Exp);
validate(ma.Ident);
break;
case New n:
foreach (var nb in n.Body)
{
validate(nb);
}
break;
case Value ve:
break;
case Sequence seq:
foreach (var item in seq)
{
validate(item);
}
break;
case Toss ts:
validate(ts.Exception);
break;
case Attempt att:
validate(att.Body);
if (att.Grab == null && att.AtLast == null)
{
throw prog.RemarkList.AttemptMustHaveGrabOrAtLastOrBoth(att);
}
if (att.Grab != null)
{
validate(att.Grab);
}
if (att.AtLast != null)
{
validate(att.AtLast);
}
break;
case Import imp:
validate(imp.QualifiedIdent);
break;
case Spec spec:
break;
default:
throw new NotSupportedException();
}
}
private int OffsetByPage(LoopInfo view, int offset)
{
return(offset + view.Left * PageDiv);
}
public IEnumerable <string> Transform(ForNode item)
{
_EncounteredOutputStyleBlock = true;
if (!(ShouldRender && _EncounteredOutputStyleBlock))
{
yield break;
}
object?evalObj;
if (item.Expression != null)
{
evalObj = Environment.Evaluation.EvaluateDynamic(item.Expression.Expression, Scopes);
}
else
{
evalObj = item.AlreadyEvaluatedObject;
}
Func <object?[], object?> loopFunction = args =>
{
if (args?.Length != 1)
{
throw new NotImplementedException();
}
return(new ForNode(item.PrimaryBlock, item.ElseBlock, item.VariableNames,
args[0], item.Filter, item.Recursive,
item.EndParsingNode, item.WhiteSpaceControl));
};
var arr = CollectionEx.ToArray(evalObj) ?? Array.Empty <object>();
if (item.Filter != null)
{
var filtered = new List <object?>();
foreach (var arrItem in arr)
{
var unpacked = ReflectionHelpers.Unpack(arrItem, item.VariableNames.Length);
Scopes.Push($"ForNode | Filter: {item.Filter} Item: {arrItem}");
for (var i = 0; i < unpacked.Length; ++i)
{
Scopes.Current.DefineAndSetVariable(item.VariableNames[i], unpacked[i]);
}
var result = Environment.Evaluation.EvaluateDynamic(item.Filter.Expression, Scopes);
Scopes.Pop($"ForNode | Filter: {item.Filter} Item: {arrItem}");
if (TypeCoercion.GetTruthy(result))
{
filtered.Add(arrItem);
}
}
arr = filtered.ToArray();
}
if (arr.Length == 0 && item.ElseBlock != null)
{
foreach (var output in item.ElseBlock.Transform(this))
{
yield return(output);
}
yield break;
}
var depth = 0;
if (Scopes.Current.TryGetVariable <LoopInfo>("loop", out var previousLoopInfo) && previousLoopInfo != null)
{
depth = previousLoopInfo.depth0 + 1;
}
var loopInfo = new LoopInfo(arr, loopFunction, depth);
for (var index = 0; index < arr.Length; ++index)
{
loopInfo.index0 = index;
var arrItem = arr[index];
var unpacked = ReflectionHelpers.Unpack(arrItem, item.VariableNames.Length);
Scopes.Push($"ForNode: {item.Expression} Item: {arrItem}");
for (var i = 0; i < unpacked.Length; ++i)
{
Scopes.Current.DefineAndSetVariable(item.VariableNames[i], unpacked[i]);
}
Scopes.Current.DefineAndSetVariable("loop", loopInfo);
foreach (var output in item.PrimaryBlock.Transform(this))
{
yield return(output);
}
Scopes.Pop($"ForNode: {item.Expression} Item: {arrItem}");
}
yield break;
}
private int GetPageOffset(LoopInfo view, int index)
{
return(index - view.Left * PageDiv);
}
/// <summary>
/// Retrieves the lines in a text file, one at a time.
/// </summary>
/// <param name="input">The name of the text file whose contents will be read by the loop.</param>
/// <param name="output">The optional name of the file to be kept open for the duration of the loop.</param>
/// <returns></returns>
public static IEnumerable LoopRead(string input, string output)
{
if (!File.Exists(input))
yield break;
StreamWriter writer = null;
if (output == "*")
{
writer = new StreamWriter(Console.OpenStandardOutput());
}
else if (!string.IsNullOrEmpty(output))
{
bool binary = output[0] == '*';
if (binary)
output = output.Substring(1);
if (output.Length == 0 || !File.Exists(output))
yield break;
writer = new StreamWriter(File.OpenWrite(output));
if (binary)
writer.NewLine = "\n";
}
var info = new LoopInfo { type = LoopType.File };
loops.Push(info);
var reader = File.OpenText(input);
string line;
while ((line = reader.ReadLine()) != null)
{
if (writer != null)
writer.WriteLine(line);
info.result = line;
info.index++;
yield return line;
}
loops.Pop();
}
} // IfThenElse
// Return a do...while statement.
public StmtFrag DoWhile( LoopInfo loopInfo, StmtFrag body,
ExprFrag condition )
{
CSharpLoopInfo csLoopInfo = (CSharpLoopInfo)loopInfo;
CSharpStmtFrag frag = new CSharpStmtFrag(csLoopInfo.loc);
CSharpExprFrag csCondition = (CSharpExprFrag)condition;
frag.Append("do");
((CSharpStmtFrag)body).Append("continueTarget_{0}:", csLoopInfo.index + 1);
frag.AppendIndentedBody(body);
frag.Append("while (Support.BoolTest(" + csCondition.GenerateRHS() + "))");
frag.Append("breakTarget_{0}: {1}", csLoopInfo.index + 1, "{}");
return frag;
} // DoWhile
/// <summary>
/// Retrieves the specified files or folders, one at a time.
/// </summary>
/// <param name="pattern">The name of a single file or folder, or a wildcard pattern.</param>
/// <param name="folders">One of the following digits, or blank to use the default:
/// <list>
/// <item><code>1</code> (default) folders are not retrieved (only files);</item>
/// <item><code>1</code> all files and folders that match the wildcard pattern are retrieved;</item>
/// <item><code>2</code> only folders are retrieved (no files).</item>
/// </list>
/// </param>
/// <param name="recurse"><code>1</code> to recurse into subfolders, <code>0</code> otherwise.</param>
/// <returns></returns>
public static IEnumerable LoopFile(string pattern, int folders, bool recurse)
{
var info = new LoopInfo { type = LoopType.Directory };
loops.Push(info);
string[] list = Directory.GetFiles(pattern, string.Empty, recurse ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly);
foreach (var file in list)
{
info.result = file;
info.index++;
yield return file;
}
loops.Pop();
}
/// <summary>
/// Retrieves substrings (fields) from a string, one at a time.
/// </summary>
/// <param name="input">The string to parse.</param>
/// <param name="delimiters">One of the following:
/// <list>
/// <item>the word <code>CSV</code> to parse in comma seperated value format;</item>
/// <item>a sequence of characters to treat as delimiters;</item>
/// <item>blank to parse each character of the string.</item>
/// </list>
/// </param>
/// <param name="omit">An optional list of characters (case sensitive) to exclude from the beginning and end of each substring.</param>
/// <returns></returns>
public static IEnumerable LoopParse(string input, string delimiters, string omit)
{
var info = new LoopInfo {
type = LoopType.Parse
};
loops.Push(info);
if (delimiters.ToLowerInvariant() == Keyword_CSV)
{
var reader = new StringReader(input);
var part = new StringBuilder();
bool str = false, next = false;
while (true)
{
int current = reader.Read();
if (current == -1)
{
goto collect;
}
const char tokenStr = '"', tokenDelim = ',';
var sym = (char)current;
switch (sym)
{
case tokenStr:
if (str)
{
if ((char)reader.Peek() == tokenStr)
{
part.Append(tokenStr);
reader.Read();
}
else
{
str = false;
}
}
else
{
if (next)
{
part.Append(tokenStr);
}
else
{
str = true;
}
}
break;
case tokenDelim:
if (str)
{
goto default;
}
goto collect; // sorry
default:
next = true;
part.Append(sym);
break;
}
continue;
collect:
next = false;
string result = part.ToString();
part.Length = 0;
info.result = result;
info.index++;
yield return(result);
if (current == -1)
{
break;
}
}
}
else
{
string[] parts;
var remove = omit.ToCharArray();
if (string.IsNullOrEmpty(delimiters))
{
var chars = input.ToCharArray();
parts = new string[chars.Length];
for (int i = 0; i < chars.Length; i++)
{
parts[i] = chars[i].ToString();
}
}
else
{
parts = input.Split(delimiters.ToCharArray(), StringSplitOptions.None);
}
foreach (var part in parts)
{
var result = part.Trim(remove);
if (string.IsNullOrEmpty(result))
{
continue;
}
info.result = result;
info.index++;
yield return(result);
}
}
loops.Pop();
}
} // WhileDo
// Return a for statement. init is the loop initializer, cond is the
// loop control expression, and step is the loop increment expression.
// Any or all of init, cond, and step can be null.
public StmtFrag For( LoopInfo loopInfo, StmtFrag init,
ExprFrag cond, ExprFrag step, StmtFrag body )
{
CSharpLoopInfo csLoopInfo = (CSharpLoopInfo)loopInfo;
CSharpStmtFrag frag = new CSharpStmtFrag(csLoopInfo.loc);
frag.Append(init);
CSharpExprFrag csCondition = (CSharpExprFrag)cond;
frag.Append("while (Support.BoolTest(" + csCondition.GenerateRHS() + "))");
((CSharpStmtFrag)body).Append("continueTarget_{0}:", csLoopInfo.index + 1);
((CSharpStmtFrag)body).Append(ExpressionStmt(step));
frag.AppendIndentedBody(body);
frag.Append("breakTarget_{0}: {1}", csLoopInfo.index + 1, "{}");
return frag;
} // For