added crashtester tool

tools/nimsuggest/crashtester.nim

@@ -0,0 +1,52 @@
+
+
+import strutils, os, osproc, streams
+
+const
+  DummyEof = "!EOF!"
+
+proc getPosition(s: string): (int, int) =
+  result = (1, 1)
+  var col = 0
+  for i in 0..<s.len:
+    if s[i] == '\L':
+      inc result[0]
+      col = 0
+    else:
+      inc col
+  result[1] = col+1
+
+proc callNimsuggest() =
+  let cl = parseCmdLine("nimsuggest --tester temp000.nim")
+  var p = startProcess(command=cl[0], args=cl[1 .. ^1],
+                       options={poStdErrToStdOut, poUsePath,
+                       poInteractive, poDemon})
+  let outp = p.outputStream
+  let inp = p.inputStream
+  var report = ""
+  var a = newStringOfCap(120)
+  let contents = readFile("tools/nimsuggest/crashtester.nim")
+  try:
+    # read and ignore anything nimsuggest says at startup:
+    while outp.readLine(a):
+      if a == DummyEof: break
+
+    var line = 0
+    for i in 0..< contents.len:
+      let slic = contents[0..i]
+      writeFile("temp000.nim", slic)
+      let (line, col) = getPosition(slic)
+      inp.writeLine("sug temp000.nim:$#:$#" % [$line, $col])
+      inp.flush()
+      var answer = ""
+      while outp.readLine(a):
+        if a == DummyEof: break
+        answer.add a
+        answer.add '\L'
+      echo answer
+  finally:
+    inp.writeLine("quit")
+    inp.flush()
+    close(p)
+
+callNimsuggest()