private static LNode ValidateOnStmt(LNode node, IMacroContext context, out LNodeList restOfStmts, out LNode firstArg)
{
var a = node.Args;
LNode on_handler;
restOfStmts = LNode.List();
firstArg = null;
if (a.Count == 2)
{
firstArg = a[0];
}
else if (a.Count != 1)
{
return(null);
}
if (!(on_handler = a.Last).Calls(S.Braces))
{
return(null);
}
if (context.RemainingNodes.Count == 0)
{
context.Sink.Warning(node, "{0} should not be the final statement of a block.", node.Name);
}
restOfStmts = new LNodeList(context.RemainingNodes);
context.DropRemainingNodes = true;
return(on_handler);
}
internal static MacroMode GetMacroMode(ref LNodeList attrs, LNode pattern)
{
MacroMode modes = 0;
attrs = attrs.SmartWhere(attr =>
{
if (attr.IsId && Enum.TryParse(attr.Name.Name, out MacroMode mode))
{
modes |= mode;
return(false);
}
return(true);
});
if (pattern.IsLiteral)
{
modes |= MacroMode.MatchEveryLiteral;
}
else if (pattern.IsId)
{
modes |= MacroMode.MatchIdentifierOnly;
}
else if (DecodeSubstitutionExpr(pattern, out _, out _, out _) != null)
{
modes |= MacroMode.MatchEveryCall | MacroMode.MatchEveryIdentifier | MacroMode.MatchEveryLiteral;
}
else if (!pattern.Target.IsId)
{
modes |= MacroMode.MatchEveryCall; // custom matching code needed
}
return(modes);
}
public LNodeList EliminateSequenceExpressions(LNodeList stmts, bool isDeclContext)
{
return(stmts.SmartSelectMany(stmt => {
/*
* // Optimization: scan find out whether this construct has any block
* // expressions. If not, skip it.
* hasBlockExprs = false;
* stmt.ReplaceRecursive(new Func<LNode, Maybe<LNode>>(n => {
* if (!hasBlockExprs)
* hasBlockExprs = n.IsCall && (
* (n.Calls(S.ColonColon, 2) && n.Args[1].IsId) ||
* (n.Calls(S.Var, 2) && n.AttrNamed(S.Out) != null) ||
* (n.Calls(S.In, 2) && n.Args[1].Calls(S.Braces)));
* return hasBlockExprs ? n : null;
* }));
* if (!hasBlockExprs)
* return stmt;
*/
LNode result = EliminateSequenceExpressions(stmt, isDeclContext);
if (result != stmt)
{
if (result.Calls(sy__numrunSequence))
{
return result.Args;
}
}
_arrayOf1[0] = result;
return _arrayOf1;
}));
}
private static void DSOCM_DistributeAttributes(LNodeList attrs, ref LNode newArg, ref LNode propOrFieldDecl)
{
// Some word attributes like `public` and `static` move to the field
// or property, as well as named parameters representing an attribute
// target `field:` or `property:`; all others belong on the argument.
// Example: given `[A] [field: B] public params T _arg = value`, we want
// a field `[B] public T arg` and a parameter `[A] params T arg = value`.
LNodeList argAttrs = LNodeList.Empty, fieldAttrs = LNodeList.Empty;
foreach (var attr in attrs)
{
var name = attr.Name;
if (attr.IsId && (FieldCreationAttributes.Contains(name) || name == S.Readonly))
{
fieldAttrs.Add(attr);
}
else if (name == S.TriviaSLComment || name == S.TriviaNewline)
{
fieldAttrs.Add(attr); // Put doc comments and leading newline on the field/prop
}
else if (attr.Calls(S.NamedArg, 2) && (attr.Args[0].IsIdNamed("field") || attr.Args[0].IsIdNamed("property")))
{
fieldAttrs.Add(attr.Args[1]);
}
else
{
argAttrs.Add(attr);
}
}
propOrFieldDecl = propOrFieldDecl.WithAttrs(fieldAttrs);
newArg = newArg.WithAttrs(argAttrs);
}
/// <summary>Searches a list of expressions/statements for one or more
/// patterns, and performs replacements.</summary>
/// <param name="stmts">A list of expressions/statements in which to search.</param>
/// <param name="patterns">Each pair consists of (A) something to search
/// for and (B) a replacement expression. Part A can use the substitution
/// operator with an identifier inside (e.g. $Foo) to "capture" any
/// subexpression, and part B can use the same substitution (e.g. $Foo)
/// to insert the captured subexpression(s) into the output.</param>
/// <param name="replacementCount">Number of replacements that occurred.</param>
/// <returns>The result of applying the replacements.</returns>
/// <remarks><see cref="LNodeExt.MatchesPattern"/> is used for matching.</remarks>
public static LNodeList Replace(LNodeList stmts, Pair <LNode, LNode>[] patterns, out int replacementCount)
{
// This list is used to support simple token replacement in TokenTrees
_tokenTreeRepls = InternalList <Triplet <Symbol, LNode, int> > .Empty;
foreach (var pair in patterns) // Look for Id => Id or Id => Literal
{
if (pair.A.IsId && (pair.B.IsId || pair.B.IsLiteral))
{
_tokenTreeRepls.Add(new Triplet <Symbol, LNode, int>(pair.A.Name, pair.B, 0));
}
}
// Scan the syntax tree for things to replace...
int count = 0;
var temp = new MMap <Symbol, LNode>();
var output = stmts.SmartSelect(stmt => stmt.ReplaceRecursive(n => {
LNode r = TryReplaceHere(n, patterns, temp);
if (r != null)
{
count++;
}
return(r);
}));
replacementCount = count;
return(output);
}
internal void AddParts(LNodeList parts)
{
foreach (var part in parts)
{
Parts.Add(new AdtParam(part, this));
}
}
internal static LNodeList GetArgNamesFromFormalArgList(LNode args, Action <LNode> onError)
{
LNodeList formalArgs = args.Args;
LNodeList argList = LNodeList.Empty;
foreach (var formalArg in formalArgs)
{
if (!formalArg.Calls(S.Var, 2))
{
onError(formalArg);
}
else
{
LNode argName = formalArg.Args[1];
if (argName.Calls(S.Assign, 2))
{
argName = argName.Args[0];
}
LNode @ref = formalArg.AttrNamed(S.Ref) ?? formalArg.AttrNamed(S.Out);
if (@ref != null)
{
argName = argName.PlusAttr(@ref);
}
argList.Add(argName);
}
}
return(argList);
}
private static void WarnAboutMissingDollarSigns(LNodeList argList, IMacroContext context, LNode pattern, LNode replacement)
{
// Warn if a name appears in both pattern and replacement but uses $ in only one of the two.
Dictionary <Symbol, LNode> pVars = ScanForVariables(pattern), rVars = ScanForVariables(replacement);
// Also warn if it looks like all `$`s were forgotten.
bool allIds = argList.Count > 0 && argList.All(n => !n.IsCall);
foreach (var pair in pVars)
{
LNode rVar = rVars.TryGetValue(pair.Key, null);
if (pair.Value.IsId) // id without `$` in pattern list
{
if (rVar != null && (allIds || !rVar.IsId))
{
context.Sink.Warning(pair.Value, "`{0}` is written without `$`, so it may not match as intended.", pair.Value.Name);
}
}
else // $id in pattern list
{
if (rVar != null && rVar.IsId)
{
context.Sink.Warning(rVar, "`{0}` appears in the output without `$` so replacement will not occur.", pair.Key);
}
}
}
}
/// <summary>Given the contents of case statement like `matchCode` or
/// `switch`, this method gets a list of the cases.</summary>
/// <returns>The first item in each pair is a list of the cases associated
/// with a single handler (for `default:`, the list is empty). The second
/// item is the handler code.</returns>
static internal VList <Pair <LNodeList, LNodeList> > GetCases(LNodeList body, IMessageSink sink)
{
var pairs = VList <Pair <LNodeList, LNodeList> > .Empty;
for (int i = 0; i < body.Count; i++)
{
bool isDefault;
if (body[i].Calls(S.Lambda, 2))
{
var alts = body[i][0].WithoutOuterParens().AsList(S.Tuple).SmartSelect(UnwrapBraces);
pairs.Add(Pair.Create(alts, body[i][1].AsList(S.Braces)));
}
else if ((isDefault = IsDefaultLabel(body[i])) || body[i].CallsMin(S.Case, 1))
{
var alts = isDefault ? LNodeList.Empty : body[i].Args.SmartSelect(UnwrapBraces);
int bodyStart = ++i;
for (; i < body.Count && !IsDefaultLabel(body[i]) && !body[i].CallsMin(S.Case, 1); i++)
{
}
var handler = new LNodeList(body.Slice(bodyStart, i - bodyStart));
pairs.Add(Pair.Create(alts, handler));
i--; // counteract i++ when loop repeats (redo)
}
else
{
Reject(sink, body[i], "expected 'case _:' or '_ => _'");
break;
}
}
return(pairs);
}
void ProcessRequiresAttribute(LNodeList conditions, Symbol mode, LNode variableName)
{
// Create a "Contract.Requires()" check for each provided condition.
foreach (var condition_ in conditions)
{
LNode condition = condition_; // make it writable so we can replace `_`
LNode conditionStr;
if (ReplaceContractUnderscore(ref condition, variableName))
{
if (variableName == null)
{
Context.Sink.Error(condition, "`{0}`: underscore has no meaning in this location.", mode);
}
}
if (mode == sy_assert)
{
PrependStmts.Add(LNode.Call((Symbol)"assert", LNode.List(condition))); // relies on assert() macro
}
else if (_haveCCRewriter)
{
PrependStmts.Add(LNode.Call(LNode.Call(CodeSymbols.Dot, LNode.List(LNode.Id((Symbol)"Contract"), LNode.Id((Symbol)"Requires"))).SetStyle(NodeStyle.Operator), LNode.List(condition)));
}
else
{
conditionStr = ConditionToStringLit(condition, "Precondition failed: {1}");
PrependStmts.Add(LNode.Call(GetAssertMethodForRequires(), LNode.List(condition, conditionStr)));
}
}
}
protected void Test(string input, IParsingService inLang, string expected, IParsingService outLang, int maxExpand = 0xFFFF, IMessageSink sink = null)
{
MacroProcessor lemp = NewLemp(maxExpand, inLang).With(l => l.Sink = sink);
var inputCode = new LNodeList(inLang.Parse(input, MessageSink.Default));
Test(inputCode, lemp, expected, outLang);
}
public LNodeList StmtList()
{
LNodeList result = default(LNodeList);
var endMarker = LT0.Type() == TT.Literal && LT0.TypeMarker == null ? TT.EOF : TT.Semicolon;
result = ExprList(ref endMarker);
return(result);
}
protected void AppendInitializersInside(Token group, ref LNodeList list)
{
if (Down(group.Children))
{
InitializerList(ref list);
Up();
}
}
protected override void WriteOutput(InputOutput io)
{
LNodeList results = io.Output;
Output.AppendFormat("// Generated from {1} by LeMP {2}.{0}", io.OutOptions.NewlineString,
io.FileName, typeof(Compiler).Assembly.GetName().Version.ToString());
io.OutPrinter.Print(results, Output, Sink, ParsingMode.File, io.OutOptions);
}
public override LNode WithAttrs(LNodeList attrs)
{
if (attrs.Count == 0)
{
return(this);
}
return(new StdLiteralNodeWithAttrs <TValue>(attrs, _value, this));
}
protected LNodeList AppendExprsInside(Token group, LNodeList list, bool allowTrailingComma = false, bool allowUnassignedVarDecl = false)
{
if (Down(group.Children))
{
ExprList(ref list, allowTrailingComma, allowUnassignedVarDecl);
return(Up(list));
}
return(list);
}
public static LNodeList MaybeRemoveNoOpFromRunSeq(LNodeList runSeq)
{
// Delete final no-op in case of e.g. Foo()::id; => #runSequence(var id = Foo(); id)
if (runSeq.Count > 1 && runSeq.Last.IsId)
{
return(runSeq.WithoutLast(1));
}
return(runSeq);
}
protected override void Stmt(string text, LNode expected, Action <EcsPrinterOptions> configure = null, Mode mode = Mode.Both)
{
bool exprMode = (mode & Mode.Expression) != 0;
if ((mode & (Mode.ParserTest | Mode.ExpectAndDropParserError)) == 0)
{
return;
}
var sink = (mode & Mode.ExpectAndDropParserError) != 0 ? new MessageHolder() : (IMessageSink)ConsoleMessageSink.Value;
using (Token.SetToStringStrategy(TokenExt.ToString)) // debugging aid
{
// This is the easy way:
// LNode result = EcsLanguageService.Value.ParseSingle(text, sink, exprMode ? ParsingMode.Expressions : ParsingMode.Statements, preserveComments: true);
// But to make debugging easier, I'll do it the long way:
ILexer <Token> lexer = EcsLanguageService.Value.Tokenize(new UString(text), "", sink);
var preprocessed = new EcsPreprocessor(lexer, true);
var treeified = new TokensToTree(preprocessed, false);
var parser = new EcsParser(treeified.Buffered(), lexer.SourceFile, sink, null);
LNodeList results = exprMode ? LNode.List(parser.ExprStart(false)) : LNode.List(parser.ParseStmtsGreedy());
// Inject comments
var injector = new EcsTriviaInjector(preprocessed.TriviaList, preprocessed.SourceFile, (int)TokenType.Newline, "/*", "*/", "//", (mode & Mode.Expression) == 0);
results = LNode.List(injector.Run(results.GetEnumerator()).ToList());
LNode result = results.AsLNode(S.Splice);
AreEqual(TokenType.EOF, parser.LT0.Type(), string.Format("Parser stopped before EOF at [{0}] in {1}", parser.LT0.StartIndex, text));
if ((mode & Mode.IgnoreTrivia) != 0)
{
result = result.ReplaceRecursive(n => n.IsTrivia ? Maybe <LNode> .NoValue : n, LNode.ReplaceOpt.ProcessAttrs).Value;
}
if (sink is MessageHolder)
{
((MessageHolder)sink).WriteListTo(TraceMessageSink.Value);
GreaterOrEqual(((MessageHolder)sink).List.Count(m => m.Severity >= Severity.Error), 1,
"Expected an error but got none for " + text);
if (expected == null)
{
return;
}
}
if (!expected.Equals(result, LNode.CompareMode.TypeMarkers))
{
if ((mode & Mode.CompareAsLes) != 0)
{
using (LNode.SetPrinter(Syntax.Les.Les3LanguageService.Value))
AreEqual(expected.ToString(), result.ToString());
}
else
{
AreEqual(expected, result);
}
Fail("{0} has a different type marker than {1}", expected, result);
}
}
}
private static LNode RegisterSimpleMacro(LNodeList attrs, LNode pattern, LNode body, IMacroContext context)
{
if (DecodeSubstitutionExpr(pattern, out _, out _, out _) != null)
{
return(Reject(context, pattern, "Defining a macro that could match everything is not allowed."));
}
MacroMode modes = GetMacroMode(ref attrs, pattern);
LNode macroName = pattern.Target ?? pattern;
LNode replacement = body.AsList(S.Braces).AsLNode(S.Splice);
if (pattern.IsCall)
{
WarnAboutMissingDollarSigns(pattern.Args, context, pattern, replacement);
}
// Note: we could fill out the macro's Syntax and Description with the
// pattern and replacement converted to strings, but it's generally a
// waste of CPU time as those strings are usually not requested.
// Compromise: provide syntax pattern only
var syntax = pattern.ToString();
var lma = new LexicalMacroAttribute(syntax, "User-defined macro at {0}".Localized(pattern.Range.Start), macroName.Name.Name)
{
Mode = modes
};
if ((modes & (MacroMode.MatchEveryLiteral | MacroMode.MatchEveryCall | MacroMode.MatchEveryIdentifier)) != 0)
{
lma = new LexicalMacroAttribute(syntax, lma.Description)
{
Mode = modes
}
}
;
var macroInfo = new MacroInfo(null, lma, UserDefinedMacro);
macroInfo.Mode |= MacroMode.UseLogicalNameInErrorMessages;
context.RegisterMacro(macroInfo);
return(F.Splice()); // delete the `define` node from the output
LNode UserDefinedMacro(LNode candidate, IMacroContext context2)
{
MMap <Symbol, LNode> captures = new MMap <Symbol, LNode>();
if (candidate.MatchesPattern(pattern, ref captures, out LNodeList unmatchedAttrs))
{
LNode replacement2 = WithUniqueIdentifiers(replacement, context.IncrementTempCounter, out _);
return(ReplaceCaptures(replacement2, captures).PlusAttrsBefore(unmatchedAttrs));
}
return(null);
}
}
// Given Foo(x, y, a = 1, c = 2), extracts { a = 1, c = 2 } to a separate list
private static LNodeList SeparateAttributeSetters(ref LNode attribute)
{
LNodeList setters = LNode.List();
while (attribute.Args.LastOrDefault()?.Calls(S.Assign) == true)
{
setters.Insert(0, attribute.Args.Last);
attribute = attribute.WithArgs(attribute.Args.WithoutLast(1));
}
return(setters);
}
private static bool AreValidLinqClauses(LNodeList parts, int i, Pedantics p)
{
for (; i < parts.Count; i++)
{
if (LinqClauseKind(parts[i], p) == null)
{
return(false);
}
}
return(true);
}
private LNodeList StmtListInside(Token t)
{
var list = new LNodeList();
if (Down(t.Children))
{
StmtList(ref list);
return(Up(list));
}
return(list);
}
private void PrintArgList(LNodeList args, ParenFor kind, bool allowUnassignedVarDecl, bool omitMissingArguments, char separator = ',')
{
var keepFlags = _flags & (Ambiguity.InPattern | Ambiguity.IsPattern);
using (WithFlags(keepFlags | (allowUnassignedVarDecl ? Ambiguity.AllowUnassignedVarDecl : 0))) {
WriteOpenParen(kind);
_out.Indent(PrinterIndentHint.Brackets);
PrintArgs(args, _flags, omitMissingArguments, separator);
_out.Dedent(PrinterIndentHint.Brackets);
WriteCloseParen(kind);
}
}
internal CodeGeneratorForMatchCase(IMacroContext context, LNode input, LNodeList handler)
{
_context = context;
_input = input;
_handler = handler;
var @break = LNode.Call(CodeSymbols.Break);
if (_handler.IsEmpty || !_handler.Last.Equals(@break))
{
_handler.Add(@break);
}
}
// Looks for contract attributes in a list and creates statements that
// should be inserted at the beginning of the method that those attributes
// are a part of. `variableName` is the name of the associated method
// argument, or null if the attributes are attached to the return value or
// the entire method. Returns the attribute list with contract attributes
// removed.
internal LNodeList Process(LNodeList attributes, LNode variableName, bool isPropSetter = false)
{
return(attributes.SmartWhere(attr => {
LNode exceptionType = null;
var mode = GetContractAttrMode(attr, out exceptionType);
if (mode != null)
{
ProcessAttribute(attr, mode, exceptionType, variableName, isPropSetter);
return false; // Remove contract attribute from method signature
}
return true; // No change
}));
}
public static LNode AddCsLineDirectives(LNode node, IMacroContext context)
{
if (node.ArgCount != 0)
{
return(null);
}
int sourceLine = -1;
var list0 = new LNodeList(context.RemainingNodes);
var list1 = context.PreProcess(list0);
var list2 = AddLineDirectives(list1, true, ref sourceLine);
context.DropRemainingNodes = true;
return(F.Call(S.Splice, list2));
}
// Generates a class declaration for the current alt and its subtypes
internal void GenerateOutput(ref LNodeList list)
{
bool isAbstract = _classAttrs.Any(a => a.IsIdNamed(S.Abstract));
var baseParts = new List <AdtParam>();
for (var type = ParentType; type != null; type = type.ParentType)
{
baseParts.InsertRange(0, type.Parts);
}
var allParts = baseParts.Concat(Parts);
var initialization = Parts.Select(p => LNode.Call(CodeSymbols.Assign, LNode.List(LNode.Call(CodeSymbols.Dot, LNode.List(LNode.Id(CodeSymbols.This), p.NameId)).SetStyle(NodeStyle.Operator), p.NameId)).SetStyle(NodeStyle.Operator)).ToList();
if (baseParts.Count > 0)
{
initialization.Insert(0, F.Call(S.Base, baseParts.Select(p => p.NameId)));
}
var args = new LNodeList(allParts.Select(p => p.OriginalDecl));
if (!_constructorAttrs.Any(a => a.IsIdNamed(S.Public)))
{
_constructorAttrs.Add(F.Id(S.Public));
}
LNode constructor = LNode.Call(LNode.List(_constructorAttrs), CodeSymbols.Constructor, LNode.List(LNode.Missing, _typeNameStem, LNode.Call(CodeSymbols.AltList, LNode.List(args)), LNode.Call(CodeSymbols.Braces, LNode.List().AddRange(initialization).AddRange(_extraConstrLogic)).SetStyle(NodeStyle.StatementBlock)));
var outBody = new LNodeList();
outBody.Add(constructor);
outBody.AddRange(Parts.Select(p => p.GetFieldDecl()));
outBody.AddRange(baseParts.Select(p => GetWithFn(p, isAbstract, S.Override, allParts)));
outBody.AddRange(Parts.Select(p => GetWithFn(p, isAbstract, _children.Count > 0 ? S.Virtual : null, allParts)));
outBody.AddRange(Parts.WithIndexes()
.Where(kvp => kvp.Value.NameId.Name.Name != "Item" + (baseParts.Count + kvp.Key + 1))
.Select(kvp => kvp.Value.GetItemDecl(baseParts.Count + kvp.Key + 1)));
outBody.AddRange(_classBody);
list.Add(LNode.Call(LNode.List(_classAttrs), CodeSymbols.Class, LNode.List(TypeName, LNode.Call(CodeSymbols.AltList, LNode.List(BaseTypes)), LNode.Call(CodeSymbols.Braces, LNode.List(outBody)).SetStyle(NodeStyle.StatementBlock))));
if (_genericArgs.Count > 0 && Parts.Count > 0)
{
var argNames = allParts.Select(p => p.NameId);
list.Add(LNode.Call(LNode.List().AddRange(_classAttrs).Add(LNode.Id(CodeSymbols.Static)).Add(LNode.Id(CodeSymbols.Partial)), CodeSymbols.Class, LNode.List(_typeNameStem, LNode.Call(CodeSymbols.AltList), LNode.Call(CodeSymbols.Braces, LNode.List(LNode.Call(LNode.List(LNode.Id(CodeSymbols.Public), LNode.Id(CodeSymbols.Static)), CodeSymbols.Fn, LNode.List(TypeNameWithoutAttrs, LNode.Call(CodeSymbols.Of, LNode.List().Add(LNode.Id((Symbol)"New")).AddRange(_genericArgs)).SetStyle(NodeStyle.Operator), LNode.Call(CodeSymbols.AltList, LNode.List(args)), LNode.Call(CodeSymbols.Braces, LNode.List(LNode.Call(CodeSymbols.Return, LNode.List(LNode.Call(CodeSymbols.New, LNode.List(LNode.Call(TypeNameWithoutAttrs, LNode.List(argNames)))))))).SetStyle(NodeStyle.StatementBlock))))).SetStyle(NodeStyle.StatementBlock))));
}
foreach (var child in _children)
{
child.GenerateOutput(ref list);
}
}
private static LNode CompileTimeMacro(string macroName, LNode node, IMacroContext context, bool alsoRuntime, bool wantPreprocess = true)
{
if (node.ArgCount != 1 || !node[0].Calls(S.Braces))
{
context.Error(node.Target, "{0} should have a single argument: a braced block.", macroName);
return(null);
}
LNodeList code = node[0].Args;
if (wantPreprocess)
{
if (context.Ancestors.Take(context.Ancestors.Count - 1).Any(
n => n.Name.IsOneOf(S.Class, S.Struct, S.Enum, S.Namespace) ||
n.Name.IsOneOf(S.Constructor, S.Fn, S.Property, S.Var)))
{
context.Error(node.Target, "{0} is designed for use only at the top level of the file. It will be executed as though it is at the top level: any outer scopes will be ignored.", macroName);
}
code = context.PreProcess(code);
}
WriteHeaderCommentInSessionLog(node, context.Sink);
// Remove namespace blocks (not supported by Roslyn scripting)
LNode namespaceBlock = null;
var codeSansNamespaces = code.RecursiveReplace(RemoveNamespaces);
LNodeList?RemoveNamespaces(LNode n)
{
if (EcsValidators.SpaceDefinitionKind(n, out _, out _, out LNode body) == S.Namespace)
{
namespaceBlock = n;
return(body.Args.RecursiveReplace(RemoveNamespaces));
}
return(null);
}
if (namespaceBlock != null && wantPreprocess)
{
context.Warning(namespaceBlock, "The C# scripting engine does not support namespaces. They will be ignored when running at compile time.");
}
RunCSharpCodeWithRoslyn(node, codeSansNamespaces, context);
_roslynSessionLog?.Flush();
return(alsoRuntime ? F.Splice(code) : F.Splice());
}
private void PrintArgs(LNodeList args, Ambiguity flags, bool omitMissingArguments, char separator = ',')
{
for (int i = 0; i < args.Count; i++)
{
var arg = args[i];
bool missing = omitMissingArguments && IsSimpleSymbolWPA(arg, S.Missing) && args.Count > 1;
if (i != 0)
{
WriteThenSpace(separator, missing ? SpaceOpt.MissingAfterComma : SpaceOpt.AfterComma);
}
if (!missing)
{
PrintExpr(arg, StartExpr, flags);
}
}
}
/// <summary>Creates the default method definition wrapped around the body
/// of the rule, which was generated by the caller. Returns <see cref="Basis"/>
/// with the specified new method body. If Basis is null, a simple default
/// method signature is used, e.g. <c>public void R() {...}</c> where R is
/// the rule name.</summary>
/// <param name="methodBody">The parsing code that was generated for this rule.</param>
/// <returns>A method.</returns>
public virtual LNode CreateRuleMethod(Rule rule, LNodeList methodBody)
{
LNode method = rule.GetMethodSignature();
var parts = method.Args.ToWList();
if (parts[0].IsIdNamed(S.Missing))
{
parts[0] = F.Id(rule.Name);
}
Debug.Assert(parts.Count == 3);
if (rule.IsRecognizer)
{
methodBody.Add(F.Call(S.Return, F.True));
}
parts.Add(F.OnNewLine(F.Braces(methodBody)));
return(method.WithArgs(parts.ToLNodeList()));
}