Initial support for compound literals.

Compound literals outside of functions should work at this point.

Compound literals inside of functions are not fully implemented, so they are disabled for now. (There is some code to support them, but the code to actually initialize them at the appropriate time is not written yet.)

CCommon.pas

@@ -360,7 +360,8 @@ type
      isForwardDeclared: boolean;        {does this var use a forward declared type?}
      class: tokenEnum;                  {storage class}
      case storage: storageType of
-        stackFrame: (lln: integer);     {local label #}
+        stackFrame: (lln: integer;      {local label #}
+                     clnext: identPtr); {next compound literal}
         parameter:  (pln: integer;      {paramater label #}
                      pdisp: integer;    {disp of parameter}
                      pnext: identPtr);  {next parameter}

Expression.pas

@@ -268,6 +268,14 @@ function MakeFuncIdentifier: identPtr; extern;
 {                                                               }
 { This must only be called within a function body.              }
 
+
+function MakeCompoundLiteral(tp: typePtr): identPtr; extern;
+
+{ Make the identifier for a compound literal.                   }
+{                                                               }
+{ parameters:                                                   }
+{       tp - the type of the compound literal                   }
+
 {-- External unsigned math routines ----------------------------}
 
 function lshr (x,y: longint): longint; extern;
@@ -2001,6 +2009,49 @@ var
    end; {DoGeneric}
 
 
+   procedure DoCompoundLiteral;
+
+   { process a compound literal expression                      }
+   
+   label 1;
+   
+   var
+      id: identPtr;
+      sp: tokenPtr;
+   
+   begin {DoCompoundLiteral}
+   if kind in [preprocessorExpression,arrayExpression] then begin
+      op := opStack;
+      while op <> nil do begin
+         if op^.token.kind = sizeofsy then
+            goto 1;
+         op := op^.next;
+         end; {while}
+      Error(41);
+      errorFound := true;
+      end; {if}
+1:
+   id := MakeCompoundLiteral(opStack^.castType);
+   opStack := opStack^.next;
+   
+   {create an operand on the stack}
+   new(sp);
+   sp^.token.kind := ident;
+   sp^.token.class := identifier;
+   sp^.token.symbolPtr := id;
+   sp^.token.name := id^.name;
+   sp^.id := id;
+   sp^.next := stack;
+   sp^.left := nil;
+   sp^.middle := nil;
+   sp^.right := nil;
+   stack := sp;
+   
+   ComplexTerm;
+   expectingTerm := false;
+   end; {DoCompoundLiteral}
+
+
 begin {ExpressionTree}
 opStack := nil;
 stack := nil;
@@ -2147,6 +2198,10 @@ if token.kind in startExpression then begin
             parenCount := parenCount+1;
             end;
          end {else if}
+      else if (token.kind = lbracech)   {handle a compound literal}
+         and (opstack <> nil) and (opStack^.token.kind = castoper) then begin
+         DoCompoundLiteral
+         end {else if}
       else if token.kind = _Genericsy then {handle _Generic}
          DoGeneric
       else begin                        {handle an operation...}

Parser.pas

@@ -69,6 +69,14 @@ function MakeFuncIdentifier: identPtr;
 { This must only be called within a function body.              }
 
 
+function MakeCompoundLiteral(tp: typePtr): identPtr;
+
+{ Make the identifier for a compound literal.                   }
+{                                                               }
+{ parameters:                                                   }
+{       tp - the type of the compound literal                   }
+
+
 procedure InitParser;
 
 { Initialize the parser                                         }
@@ -176,6 +184,8 @@ var
    statementList: statementPtr;         {list of open statements}
    savedVolatile: boolean;              {saved copy of volatile}
    doingForLoopClause1: boolean;        {doing the first clause of a for loop?}
+   compoundLiteralNumber: integer;      {number of compound literal}
+   compoundLiteralToAllocate: identPtr; {compound literal that needs space allocated}
 
                                         {parameter processing variables}
                                         {------------------------------}
@@ -325,6 +335,11 @@ var
    stPtr: statementPtr;                 {work pointer}
 
 begin {EndCompoundStatement}
+while compoundLiteralToAllocate <> nil do begin  {allocate compound literals}
+   Gen2(dc_loc, compoundLiteralToAllocate^.lln,
+      long(compoundLiteralToAllocate^.itype^.size).lsw);
+   compoundLiteralToAllocate := compoundLiteralToAllocate^.clnext;
+   end {while};
 dumpLocal := false;
 stPtr := statementList;                 {pop the statement record}
 statementList := stPtr^.next;
@@ -4093,7 +4108,7 @@ begin {TypeName}
 DeclarationSpecifiers(specifierQualifierListElement, rparench);
 
 {_Alignas is not allowed in most uses of type names.            }
-{It would be allowed in compound literals, if we supported them.}
+{TODO: _Alignas should be allowed in compound literals.         }
 if _Alignassy in declarationModifiers then
    Error(142);
 
@@ -4534,6 +4549,44 @@ MakeFuncIdentifier := id;
 end; {MakeFuncIdentifier}
 
 
+function MakeCompoundLiteral{tp: typePtr): identPtr};
+
+{ Make the identifier for a compound literal.                   }
+{                                                               }
+{ parameters:                                                   }
+{       tp - the type of the compound literal                   }
+
+type
+   nameString = packed array [0..24] of char;
+
+var
+   id: identPtr;                        {the identifier for the literal}
+   name: ^nameString;                   {the name for the identifier}
+   class: tokenEnum;                    {storage class}
+
+begin {MakeCompoundLiteral}
+if functionTable <> nil then begin
+   Error(164);
+   class := autosy
+   end {if}
+else
+   class := staticsy;
+name := pointer(Malloc(25));
+name^ := concat('~CompoundLiteral', cnvis(compoundLiteralNumber));
+id := NewSymbol(name, tp, class, variableSpace, defined);
+Initializer(id);
+MakeCompoundLiteral := id;
+compoundLiteralNumber := compoundLiteralNumber + 1;
+if compoundLiteralNumber = 0 then
+   Error(57);
+if class = autosy then begin
+   id^.lln := GetLocalLabel;
+   id^.clnext := compoundLiteralToAllocate;
+   compoundLiteralToAllocate := id;
+   end;
+end; {MakeFuncIdentifier}
+
+
 procedure InitParser;
 
 { Initialize the parser                                         }
@@ -4554,6 +4607,8 @@ statementList := nil;                   {no open statements}
 codegenStarted := false;                {code generator is not started}
 doingForLoopClause1 := false;           {not doing a for loop}
 fIsNoreturn := false;                   {not doing a noreturn function}
+compoundLiteralNumber := 1;             {no compound literals yet}
+compoundLiteralToAllocate := nil;       {no compound literals needing space yet}
 
                                         {init syntactic classes of tokens}
                                         {See C17 section 6.7 ff.}

Scanner.pas

@@ -720,6 +720,7 @@ if list or (numErr <> 0) then begin
         161: msg := @'illegal operator in a constant expression';
         162: msg := @'invalid escape sequence';
         163: msg := @'pointer assignment discards qualifier(s)';
+        164: msg := @'compound literals within functions are not supported by ORCA/C';
          otherwise: Error(57);
          end; {case}
        writeln(msg^);