Merge pull request #359 from Tass/master

JS unwinding

compiler/jsgen.nim

@@ -44,7 +44,6 @@ type
   TBlock{.final.} = object 
     id: int                  # the ID of the label; positive means that it
                              # has been used (i.e. the label should be emitted)
-    nestedTryStmts: int      # how many try statements is it nested into
     isLoop: bool             # whether it's a 'block' or 'while'
   
   TGlobals{.final.} = object 
@@ -62,7 +61,6 @@ type
     module: BModule
     g: PGlobals
     BeforeRetNeeded: bool
-    nestedTryStmts: int
     unique: int
     blocks: seq[TBlock]
 
@@ -485,10 +483,6 @@ proc genLineDir(p: var TProc, n: PNode, r: var TCompRes) =
       ((p.prc == nil) or not (sfPure in p.prc.flags)): 
     appf(r.com, "F.line = $1;$n", [toRope(line)])
   
-proc finishTryStmt(p: var TProc, r: var TCompRes, howMany: int) = 
-  for i in countup(1, howMany):
-    app(r.com, "excHandler = excHandler.prev;" & tnl)
-  
 proc genWhileStmt(p: var TProc, n: PNode, r: var TCompRes) = 
   var 
     cond, stmt: TCompRes
@@ -498,7 +492,6 @@ proc genWhileStmt(p: var TProc, n: PNode, r: var TCompRes) =
   length = len(p.blocks)
   setlen(p.blocks, length + 1)
   p.blocks[length].id = - p.unique
-  p.blocks[length].nestedTryStmts = p.nestedTryStmts
   p.blocks[length].isLoop = true
   labl = p.unique
   gen(p, n.sons[0], cond)
@@ -543,7 +536,6 @@ proc genTryStmt(p: var TProc, n: PNode, r: var TCompRes) =
   if optStackTrace in p.Options: app(r.com, "framePtr = F;" & tnl)
   app(r.com, "try {" & tnl)
   length = sonsLen(n)
-  inc(p.nestedTryStmts)
   genStmt(p, n.sons[0], a)
   app(r.com, mergeStmt(a))
   i = 1
@@ -571,8 +563,6 @@ proc genTryStmt(p: var TProc, n: PNode, r: var TCompRes) =
       appf(epart, "$1}$n", [mergeStmt(a)])
     inc(i)
   if epart != nil: appf(r.com, "} catch (EXC) {$n$1", [epart])
-  finishTryStmt(p, r, p.nestedTryStmts)
-  dec(p.nestedTryStmts)
   app(r.com, "} finally {" & tnl & "excHandler = excHandler.prev;" & tnl)
   if (i < length) and (n.sons[i].kind == nkFinally): 
     genStmt(p, n.sons[i].sons[0], a)
@@ -655,7 +645,6 @@ proc genBlock(p: var TProc, n: PNode, r: var TCompRes) =
     sym.loc.a = idx
   setlen(p.blocks, idx + 1)
   p.blocks[idx].id = - p.unique # negative because it isn't used yet
-  p.blocks[idx].nestedTryStmts = p.nestedTryStmts
   labl = p.unique
   if n.kind == nkBlockExpr: genStmtListExpr(p, n.sons[1], r)
   else: genStmt(p, n.sons[1], r)
@@ -682,7 +671,6 @@ proc genBreakStmt(p: var TProc, n: PNode, r: var TCompRes) =
     if idx < 0 or not p.blocks[idx].isLoop:
       InternalError(n.info, "no loop to break")
   p.blocks[idx].id = abs(p.blocks[idx].id) # label is used
-  finishTryStmt(p, r, p.nestedTryStmts - p.blocks[idx].nestedTryStmts)
   appf(r.com, "break L$1;$n", [toRope(p.blocks[idx].id)])
 
 proc genAsmStmt(p: var TProc, n: PNode, r: var TCompRes) = 
@@ -1433,7 +1421,6 @@ proc genReturnStmt(p: var TProc, n: PNode, r: var TCompRes) =
     if a.com != nil: appf(r.com, "$1;$n", mergeStmt(a))
   else: 
     genLineDir(p, n, r)
-  finishTryStmt(p, r, p.nestedTryStmts)
   app(r.com, "break BeforeRet;" & tnl)
 
 proc genProcBody(p: var TProc, prc: PSym, r: TCompRes): PRope = 

lib/system/jssys.nim

@@ -491,6 +491,7 @@ proc toU32(a: int): int32 {.noStackFrame, compilerproc.} =
 proc nimMin(a, b: int): int {.compilerproc.} = return if a <= b: a else: b
 proc nimMax(a, b: int): int {.compilerproc.} = return if a >= b: a else: b
 
+type NimString = string # hack for hti.nim
 include "system/hti"
 
 proc isFatPointer(ti: PNimType): bool =

tests/run/tfinally.nim

@@ -1,6 +1,8 @@
 discard """
   file: "tfinally.nim"
-  output: "came here 3"
+  output: '''came
+here
+3'''
 """
 # Test return in try statement:
 
@@ -9,10 +11,10 @@ proc main: int =
     try:
       return 1
     finally:
-      stdout.write("came ")
+      echo("came")
       return 2
   finally: 
-    stdout.write("here ")
+    echo("here ")
     return 3
     
 echo main() #OUT came here 3

tests/run/tfinally2.nim

@@ -1,6 +1,9 @@
 discard """
   file: "tfinally2.nim"
-  output: "ABCD"
+  output: '''A
+B
+C
+D'''
 """
 # Test break in try statement:
 
@@ -11,15 +14,15 @@ proc main: int =
         try:
           break AB
         finally:
-          stdout.write("A")
-        stdout.write("skipped")
+          echo("A")
+        echo("skipped")
       finally: 
         block B:
-          stdout.write("B")
-      stdout.write("skipped")
-    stdout.write("C")
+          echo("B")
+      echo("skipped")
+    echo("C")
   finally:
-    stdout.writeln("D")
+    echo("D")
     
 discard main() #OUT ABCD
 

tests/specials.nim

@@ -176,14 +176,10 @@ proc runJsTests(r: var TResults, options: string) =
     runSingleTest(r, filename, options & " -d:nodejs", targetJS)
     runSingleTest(r, filename, options & " -d:nodejs -d:release", targetJS)
     
-  # texceptions, texcpt1, texcsub, tfinally, tfinally2,
-  # tfinally3
   for t in os.walkFiles("tests/js/t*.nim"):
     test(t)
-  test "tests/run/tactiontable"
-  test "tests/run/tmultim1"
-  test "tests/run/tmultim3"
-  test "tests/run/tmultim4"
+  for testfile in ["texceptions", "texcpt1", "texcsub", "tfinally", "tfinally2", "tfinally3", "tactiontable", "tmultim1", "tmultim3", "tmultim4"]:
+    test "tests/run/" & testfile & ".nim"
 
 # ------------------------- register special tests here -----------------------
 proc runSpecialTests(r: var TResults, options: string) =