better extension loading for the OpenGL wrapper

compiler/cgen.nim

@@ -552,10 +552,19 @@ proc SymInDynamicLib(m: BModule, sym: PSym) =
       initLocExpr(m.initProc, n[i], a)
       params.app(rdLoc(a))
       params.app(", ")
-    appcg(m, m.initProc.s(cpsStmts),
+    let load = ropef("\t$1 = ($2) ($3$4));$n",
-        "\t$1 = ($2) ($3$4));$n",
         [tmp, getTypeDesc(m, sym.typ),
         params, cstringLit(m, m.s[cfsDynLibInit], ropeToStr(extname))])
+    var last = lastSon(n)
+    if last.kind == nkHiddenStdConv: last = last.sons[1]
+    InternalAssert(last.kind == nkStrLit)
+    let idx = last.strVal
+    if idx.len == 0:
+      app(m.initProc.s(cpsStmts), load)
+    elif idx.len == 1 and idx[0] in {'0'..'9'}:
+      app(m.extensionLoaders[idx[0]], load)
+    else:
+      InternalError(sym.info, "wrong index: " & idx)
   else:
     appcg(m, m.s[cfsDynLibInit], 
         "\t$1 = ($2) #nimGetProcAddr($3, $4);$n", 
@@ -973,6 +982,12 @@ proc genInitCode(m: BModule) =
   # not support. So we add it to another special section: ``cfsInitProc``
   app(m.s[cfsInitProc], prc)
   
+  for i, el in pairs(m.extensionLoaders):
+    if el != nil:
+      let ex = ropef("N_NIMCALL(void, nimLoadProcs$1)(void) {$2}$N$N",
+        (i.ord - '0'.ord).toRope, el)
+      app(m.s[cfsInitProc], ex)
+
 proc genModule(m: BModule, cfilenoext: string): PRope = 
   result = getFileHeader(cfilenoext)
   result.app(genMergeInfo(m))

compiler/cgendata.nim

@@ -111,6 +111,8 @@ type
     typeNodes*, nimTypes*: int # used for type info generation
     typeNodesName*, nimTypesName*: PRope # used for type info generation
     labels*: natural          # for generating unique module-scope names
+    extensionLoaders*: array['0'..'9', PRope] # special procs for the
+                                              # OpenGL wrapper
 
 var
   mainModProcs*, mainModInit*, mainDatInit*: PRope # parts of the main module

compiler/main.nim

@@ -300,7 +300,7 @@ proc MainCommand =
     #registerPass(rodwrite.rodwritePass())
     discard CompileModule(options.libpath / "system", {sfSystemModule})
     service.serve(proc () =
-      let projectFile = gProjectFull
+      let projectFile = mainCommandArg()
       discard CompileModule(projectFile, {sfMainModule})
     )
   else: rawMessage(errInvalidCommandX, command)

compiler/service.nim

@@ -62,6 +62,7 @@ proc serve*(action: proc (){.nimcall.}) =
   server.bindAddr(port, getConfigVar("server.address"))
   var inp = "".TaintedString
   server.listen()
+  new(stdoutSocket)
   while true:
     accept(server, stdoutSocket)
     discard stdoutSocket.recvLine(inp)

lib/wrappers/opengl/opengl.nim

@@ -11,6 +11,9 @@
 ## ``useGlew`` this wrapper does not use Nimrod's ``dynlib`` mechanism, 
 ## but `glew`:idx: instead. However, this shouldn't be necessary anymore; even
 ## extension loading for the different operating systems is handled here.
+##
+## You need to call ``loadExtensions`` after a rendering context has been
+## created to load any extension proc that your code uses.
 
 when defined(linux):
   import X, XLib, XUtil
@@ -75,13 +78,21 @@ else:
       if gluHandle == nil: quit("could not load: " & gludll)
     result = glGetProc(gluHandle, procname)
   
-  # undocumented 'dynlib' feature: the empty string literal is replaced by
+  # undocumented 'dynlib' feature: the string literal is replaced by
   # the imported proc name:
   {.pragma: ogl, dynlib: glGetProc(oglHandle, "").}
-  {.pragma: oglx, dynlib: glGetProc(oglHandle, "").}
+  {.pragma: oglx, dynlib: glGetProc(oglHandle, "0").}
   {.pragma: wgl, dynlib: glGetProc(oglHandle, "").}
   {.pragma: glu, dynlib: gluGetProc("").}
   
+  proc nimLoadProcs0() {.importc.}
+  
+  template loadExtensions*() =
+    ## call this after your rendering context has been setup if you use
+    ## extensions.
+    bind nimLoadProcs0
+    nimLoadProcs0()
+
 #==============================================================================
 #                                                                              
 #       OpenGL 4.2 - Headertranslation                                         

todo.txt

@@ -1,7 +1,10 @@
 version 0.9.2
 =============
 
+- memory profiler
 - implement the compiler as a service
+- implement for loop transformation for first class iterators
+- ``=`` should be overloadable; requires specialization for ``=``
 - fix broken expr/stmt handling for proc bodies
 - make 'bind' default for templates and introduce 'mixin'
 - implicit deref for parameter matching; overloading based on 'var T'
@@ -36,7 +39,6 @@ version 0.9.XX
 
 - implement the "snoopResult" pragma
 - implement "closure tuple consists of a single 'ref'" optimization
-- implement for loop transformation for first class iterators
 - JS gen:
   - fix exception handling
 - object branch transitions can't work with the current 'reset'; add a 'reset'
@@ -52,11 +54,10 @@ version 0.9.XX
   is that often the scope of ``try`` is wrong and apart from that ``try`` is
   a full blown statement; a ``try`` expression might be a good idea to make
   error handling more light-weight
-- ``=`` should be overloadable; requires specialization for ``=``
 - fix destructors; don't work yet when used as expression
 - make use of ``tyIter`` to fix the implicit items/pairs issue
 - better support for macros that rewrite procs
-- macros need access to types and symbols
+- macros need access to types and symbols (partially implemented)
 - document nimdoc properly finally
 - make 'clamp' a magic for the range stuff
 - implement a warning message for shadowed 'result' variable