Fix #110 : use '^' rather than '-' for list negative indexes

src/nimble.nim

@@ -171,7 +171,7 @@ proc parseCmdLine(): Options =
           # Parse pkg@verRange
           if '@' in key:
             let i = find(key, '@')
-            let pkgTup = (key[0 .. i-1], key[i+1 .. -1].parseVersionRange())
+            let pkgTup = (key[0 .. i-1], key[i+1 .. ^1].parseVersionRange())
             result.action.packages.add(pkgTup)
           else:
             result.action.packages.add((key, VersionRange(kind: verAny)))

src/nimblepkg/download.nim

@@ -104,7 +104,7 @@ proc getTagsListRemote*(url: string, meth: DownloadMethod): seq[string] =
     for i in output.splitLines():
       if i == "": continue
       let start = i.find("refs/tags/")+"refs/tags/".len
-      let tag = i[start .. -1]
+      let tag = i[start .. ^1]
       if not tag.endswith("^{}"): result.add(tag)
     
   of DownloadMethod.hg:
@@ -118,7 +118,7 @@ proc getVersionList*(tags: seq[string]): Table[Version, string] =
     if tag != "":
       let i = skipUntil(tag, Digits) # skip any chars before the version
       # TODO: Better checking, tags can have any names. Add warnings and such.
-      result[newVersion(tag[i .. -1])] = tag
+      result[newVersion(tag[i .. ^1])] = tag
 
 proc getDownloadMethod*(meth: string): DownloadMethod =
   case meth

src/nimblepkg/packageinfo.nim

@@ -88,11 +88,11 @@ proc parseRequires(req: string): PkgTuple =
     if ' ' in req:
       var i = skipUntil(req, Whitespace)
       result.name = req[0 .. i].strip
-      result.ver = parseVersionRange(req[i .. -1])
+      result.ver = parseVersionRange(req[i .. ^1])
     elif '#' in req:
       var i = skipUntil(req, {'#'})
       result.name = req[0 .. i-1]
-      result.ver = parseVersionRange(req[i .. -1])
+      result.ver = parseVersionRange(req[i .. ^1])
     else:
       result.name = req.strip
       result.ver = VersionRange(kind: verAny)
@@ -339,7 +339,7 @@ proc getNameVersion*(pkgpath: string): tuple[name, version: string] =
   for i in countdown(tail.len-1, 0):
     if tail[i] == '-':
       result.name = tail[0 .. i-1]
-      result.version = tail[i+1 .. -1]
+      result.version = tail[i+1 .. ^1]
       break
 
 proc echoPackage*(pkg: Package) =

src/nimblepkg/tools.nim

@@ -62,7 +62,7 @@ proc changeRoot*(origRoot, newRoot, path: string): string =
   ## path:     /home/dom/bar/blah/2/foo.txt
   ## Return value -> /home/test/bar/blah/2/foo.txt
   if path.startsWith(origRoot):
-    return newRoot / path[origRoot.len .. -1]
+    return newRoot / path[origRoot.len .. ^1]
   else:
     raise newException(ValueError,
       "Cannot change root of path: Path does not begin with original root.")

src/nimblepkg/version.nim

@@ -139,7 +139,7 @@ proc parseVersionRange*(s: string): VersionRange =
   new(result)
   if s[0] == '#':
     result.kind = verSpecial
-    result.spe = s[1 .. -1].Special
+    result.spe = s[1 .. ^1].Special
     return
 
   var i = 0