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-rwxr-xr-xnim/lookups.pas307
1 files changed, 0 insertions, 307 deletions
diff --git a/nim/lookups.pas b/nim/lookups.pas
deleted file mode 100755
index e4c07224f..000000000
--- a/nim/lookups.pas
+++ /dev/null
@@ -1,307 +0,0 @@
-//
-//
-//           The Nimrod Compiler
-//        (c) Copyright 2009 Andreas Rumpf
-//
-//    See the file "copying.txt", included in this
-//    distribution, for details about the copyright.
-//
-unit lookups;
-
-// This module implements lookup helpers.
-
-interface
-
-uses 
-  nsystem, ast, astalgo, idents, semdata, types, msgs, options, rodread,
-  rnimsyn;
-
-{$include 'config.inc'}
-
-type
-  TOverloadIterMode = (oimDone, oimNoQualifier, oimSelfModule, oimOtherModule,
-                       oimSymChoice);
-  TOverloadIter = record
-    stackPtr: int;
-    it: TIdentIter;
-    m: PSym;
-    mode: TOverloadIterMode;
-  end;
-
-function getSymRepr(s: PSym): string;
-
-procedure CloseScope(var tab: TSymTab);
-
-procedure AddSym(var t: TStrTable; n: PSym);
-
-procedure addDecl(c: PContext; sym: PSym);
-procedure addDeclAt(c: PContext; sym: PSym; at: Natural);
-procedure addOverloadableSymAt(c: PContext; fn: PSym; at: Natural);
-
-procedure addInterfaceDecl(c: PContext; sym: PSym);
-procedure addInterfaceOverloadableSymAt(c: PContext; sym: PSym; at: int);
-
-function lookUp(c: PContext; n: PNode): PSym;
-// Looks up a symbol. Generates an error in case of nil.
-
-function QualifiedLookUp(c: PContext; n: PNode; ambiguousCheck: bool): PSym;
-
-function InitOverloadIter(out o: TOverloadIter; c: PContext; n: PNode): PSym;
-function nextOverloadIter(var o: TOverloadIter; c: PContext; n: PNode): PSym;
-
-implementation
-
-function getSymRepr(s: PSym): string;
-begin
-  case s.kind of
-    skProc, skMethod, skConverter, skIterator: result := getProcHeader(s);
-    else result := s.name.s
-  end
-end;
-
-procedure CloseScope(var tab: TSymTab);
-var
-  it: TTabIter;
-  s: PSym;
-begin
-  // check if all symbols have been used and defined:
-  if (tab.tos > length(tab.stack)) then InternalError('CloseScope');
-  s := InitTabIter(it, tab.stack[tab.tos-1]);
-  while s <> nil do begin
-    if sfForward in s.flags then
-      liMessage(s.info, errImplOfXexpected, getSymRepr(s))
-    else if ([sfUsed, sfInInterface] * s.flags = []) and
-            (optHints in s.options) then // BUGFIX: check options in s!
-      if not (s.kind in [skForVar, skParam, skMethod, skUnknown]) then
-        liMessage(s.info, hintXDeclaredButNotUsed, getSymRepr(s));
-    s := NextIter(it, tab.stack[tab.tos-1]);
-  end;
-  astalgo.rawCloseScope(tab);
-end;
-
-procedure AddSym(var t: TStrTable; n: PSym);
-begin
-  if StrTableIncl(t, n) then liMessage(n.info, errAttemptToRedefine, n.name.s);
-end;
-
-procedure addDecl(c: PContext; sym: PSym);
-begin
-  if SymTabAddUnique(c.tab, sym) = Failure then
-    liMessage(sym.info, errAttemptToRedefine, sym.Name.s);
-end;
-
-procedure addDeclAt(c: PContext; sym: PSym; at: Natural);
-begin
-  if SymTabAddUniqueAt(c.tab, sym, at) = Failure then
-    liMessage(sym.info, errAttemptToRedefine, sym.Name.s);
-end;
-
-procedure addOverloadableSymAt(c: PContext; fn: PSym; at: Natural);
-var
-  check: PSym;
-begin
-  if not (fn.kind in OverloadableSyms) then
-    InternalError(fn.info, 'addOverloadableSymAt');
-  check := StrTableGet(c.tab.stack[at], fn.name);
-  if (check <> nil) and not (check.Kind in OverloadableSyms) then
-    liMessage(fn.info, errAttemptToRedefine, fn.Name.s);
-  SymTabAddAt(c.tab, fn, at);
-end;
-
-procedure AddInterfaceDeclAux(c: PContext; sym: PSym);
-begin
-  if (sfInInterface in sym.flags) then begin
-    // add to interface:
-    if c.module = nil then InternalError(sym.info, 'AddInterfaceDeclAux');
-    StrTableAdd(c.module.tab, sym);
-  end;
-  if getCurrOwner().kind = skModule then
-    include(sym.flags, sfGlobal)
-end;
-
-procedure addInterfaceDecl(c: PContext; sym: PSym);
-begin  // it adds the symbol to the interface if appropriate
-  addDecl(c, sym);
-  AddInterfaceDeclAux(c, sym);
-end;
-
-procedure addInterfaceOverloadableSymAt(c: PContext; sym: PSym; at: int);
-begin  // it adds the symbol to the interface if appropriate
-  addOverloadableSymAt(c, sym, at);
-  AddInterfaceDeclAux(c, sym);
-end;
-
-function lookUp(c: PContext; n: PNode): PSym;
-// Looks up a symbol. Generates an error in case of nil.
-begin
-  case n.kind of
-    nkAccQuoted: result := lookup(c, n.sons[0]);
-    nkSym: begin (*
-      result := SymtabGet(c.Tab, n.sym.name);
-      if result = nil then
-        liMessage(n.info, errUndeclaredIdentifier, n.sym.name.s); *)
-      result := n.sym;
-    end;
-    nkIdent: begin
-      result := SymtabGet(c.Tab, n.ident);
-      if result = nil then
-        liMessage(n.info, errUndeclaredIdentifier, n.ident.s);
-    end
-    else InternalError(n.info, 'lookUp');
-  end;
-  if IntSetContains(c.AmbiguousSymbols, result.id) then
-    liMessage(n.info, errUseQualifier, result.name.s);
-  if result.kind = skStub then loadStub(result);
-end;
-
-function QualifiedLookUp(c: PContext; n: PNode; ambiguousCheck: bool): PSym;
-var
-  m: PSym;
-  ident: PIdent;
-begin
-  case n.kind of
-    nkIdent: begin
-      result := SymtabGet(c.Tab, n.ident);
-      if result = nil then
-        liMessage(n.info, errUndeclaredIdentifier, n.ident.s)
-      else if ambiguousCheck
-          and IntSetContains(c.AmbiguousSymbols, result.id) then
-        liMessage(n.info, errUseQualifier, n.ident.s)
-    end;
-    nkSym: begin (*
-      result := SymtabGet(c.Tab, n.sym.name);
-      if result = nil then
-        liMessage(n.info, errUndeclaredIdentifier, n.sym.name.s)
-      else *)
-      result := n.sym;
-      if ambiguousCheck and IntSetContains(c.AmbiguousSymbols, result.id) then
-        liMessage(n.info, errUseQualifier, n.sym.name.s)
-    end;
-    nkDotExpr: begin
-      result := nil;
-      m := qualifiedLookUp(c, n.sons[0], false);
-      if (m <> nil) and (m.kind = skModule) then begin
-        ident := nil;
-        if (n.sons[1].kind = nkIdent) then 
-          ident := n.sons[1].ident
-        else if (n.sons[1].kind = nkAccQuoted) 
-        and (n.sons[1].sons[0].kind = nkIdent) then
-          ident := n.sons[1].sons[0].ident;
-        if ident <> nil then begin
-          if m = c.module then
-            // a module may access its private members:
-            result := StrTableGet(c.tab.stack[ModuleTablePos], ident)
-          else
-            result := StrTableGet(m.tab, ident);
-          if result = nil then
-            liMessage(n.sons[1].info, errUndeclaredIdentifier, ident.s)
-        end
-        else
-          liMessage(n.sons[1].info, errIdentifierExpected, 
-                    renderTree(n.sons[1]));
-      end
-    end;
-    nkAccQuoted: result := QualifiedLookup(c, n.sons[0], ambiguousCheck);
-    else begin
-      result := nil;
-      //liMessage(n.info, errIdentifierExpected, '')
-    end;
-  end;
-  if (result <> nil) and (result.kind = skStub) then loadStub(result);
-end;
-
-function InitOverloadIter(out o: TOverloadIter; c: PContext; n: PNode): PSym;
-var
-  ident: PIdent;
-begin
-  result := nil;
-  case n.kind of
-    nkIdent: begin
-      o.stackPtr := c.tab.tos;
-      o.mode := oimNoQualifier;
-      while (result = nil) do begin
-        dec(o.stackPtr);
-        if o.stackPtr < 0 then break;
-        result := InitIdentIter(o.it, c.tab.stack[o.stackPtr], n.ident);
-      end;
-    end;
-    nkSym: begin 
-      result := n.sym;
-      o.mode := oimDone;
-    (*
-      o.stackPtr := c.tab.tos;
-      o.mode := oimNoQualifier;
-      while (result = nil) do begin
-        dec(o.stackPtr);
-        if o.stackPtr < 0 then break;
-        result := InitIdentIter(o.it, c.tab.stack[o.stackPtr], n.sym.name);
-      end; *)
-    end; 
-    nkDotExpr: begin
-      o.mode := oimOtherModule;
-      o.m := qualifiedLookUp(c, n.sons[0], false);
-      if (o.m <> nil) and (o.m.kind = skModule) then begin
-        ident := nil;
-        if (n.sons[1].kind = nkIdent) then 
-          ident := n.sons[1].ident
-        else if (n.sons[1].kind = nkAccQuoted) 
-        and (n.sons[1].sons[0].kind = nkIdent) then
-          ident := n.sons[1].sons[0].ident;
-        if ident <> nil then begin
-          if o.m = c.module then begin
-            // a module may access its private members:
-            result := InitIdentIter(o.it, c.tab.stack[ModuleTablePos], ident);
-            o.mode := oimSelfModule;
-          end
-          else
-            result := InitIdentIter(o.it, o.m.tab, ident);
-        end
-        else
-          liMessage(n.sons[1].info, errIdentifierExpected, 
-                    renderTree(n.sons[1]));
-      end
-    end;
-    nkAccQuoted: result := InitOverloadIter(o, c, n.sons[0]);
-    nkSymChoice: begin
-      o.mode := oimSymChoice;
-      result := n.sons[0].sym;
-      o.stackPtr := 1
-    end;
-    else begin end
-  end;
-  if (result <> nil) and (result.kind = skStub) then loadStub(result);
-end;
-
-function nextOverloadIter(var o: TOverloadIter; c: PContext; n: PNode): PSym;
-begin
-  case o.mode of
-    oimDone: result := nil;
-    oimNoQualifier: begin
-      if n.kind = nkAccQuoted then 
-        result := nextOverloadIter(o, c, n.sons[0]) // BUGFIX
-      else if o.stackPtr >= 0 then begin
-        result := nextIdentIter(o.it, c.tab.stack[o.stackPtr]);
-        while (result = nil) do begin
-          dec(o.stackPtr);
-          if o.stackPtr < 0 then break;
-          result := InitIdentIter(o.it, c.tab.stack[o.stackPtr], o.it.name);
-          // BUGFIX: o.it.name <-> n.ident
-        end
-      end
-      else result := nil;
-    end;
-    oimSelfModule:  result := nextIdentIter(o.it, c.tab.stack[ModuleTablePos]);
-    oimOtherModule: result := nextIdentIter(o.it, o.m.tab);
-    oimSymChoice: begin
-      if o.stackPtr < sonsLen(n) then begin
-        result := n.sons[o.stackPtr].sym;
-        inc(o.stackPtr);
-      end
-      else
-        result := nil
-    end;
-  end;
-  if (result <> nil) and (result.kind = skStub) then loadStub(result);
-end;
-
-end.
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2025-04-30 23:11:24 +0000