Merge remote-tracking branch 'nim-lang/devel' into emscripten-support

compiler/semgnrc.nim

@@ -32,12 +32,6 @@ type
     cursorInBody: bool # only for nimsuggest
     bracketExpr: PNode
 
-template withBracketExpr(x, body: untyped) =
-  let old = ctx.bracketExpr
-  ctx.bracketExpr = x
-  body
-  ctx.bracketExpr = old
-
 type
   TSemGenericFlag = enum
     withinBind, withinTypeDesc, withinMixin
@@ -271,7 +265,7 @@ proc semGenericStmt(c: PContext, n: PNode,
     result = newNodeI(nkCall, n.info)
     result.add newIdentNode(getIdent("[]"), n.info)
     for i in 0 ..< n.len: result.add(n[i])
-    withBracketExpr n.sons[0]:
+    withBracketExpr ctx, n.sons[0]:
       result = semGenericStmt(c, result, flags, ctx)
   of nkAsgn, nkFastAsgn:
     checkSonsLen(n, 2)
@@ -291,7 +285,7 @@ proc semGenericStmt(c: PContext, n: PNode,
       result.add newIdentNode(getIdent("[]="), n.info)
       for i in 0 ..< a.len: result.add(a[i])
       result.add(b)
-      withBracketExpr a.sons[0]:
+      withBracketExpr ctx, a.sons[0]:
         result = semGenericStmt(c, result, flags, ctx)
     else:
       for i in countup(0, sonsLen(n) - 1):

compiler/semtempl.nim

@@ -110,6 +110,13 @@ type
     toBind, toMixin, toInject: IntSet
     owner: PSym
     cursorInBody: bool # only for nimsuggest
+    bracketExpr: PNode
+
+template withBracketExpr(ctx, x, body: untyped) =
+  let old = ctx.bracketExpr
+  ctx.bracketExpr = x
+  body
+  ctx.bracketExpr = old
 
 proc getIdentNode(c: var TemplCtx, n: PNode): PNode =
   case n.kind
@@ -310,6 +317,18 @@ proc wrapInBind(c: var TemplCtx; n: PNode; opr: string): PNode =
   else:
     result = n
 
+proc oprIsRoof(n: PNode): bool =
+  const roof = "^"
+  case n.kind
+  of nkIdent: result = n.ident.s == roof
+  of nkSym: result = n.sym.name.s == roof
+  of nkAccQuoted:
+    if n.len == 1:
+      result = oprIsRoof(n.sons[0])
+  of nkOpenSymChoice, nkClosedSymChoice:
+    result = oprIsRoof(n.sons[0])
+  else: discard
+
 proc semTemplBody(c: var TemplCtx, n: PNode): PNode =
   result = n
   semIdeForTemplateOrGenericCheck(n, c.cursorInBody)
@@ -452,10 +471,16 @@ proc semTemplBody(c: var TemplCtx, n: PNode): PNode =
     result.sons[1] = semTemplBody(c, n.sons[1])
   of nkPragma:
     result = onlyReplaceParams(c, n)
-  of nkBracketExpr, nkCurlyExpr:
+  of nkBracketExpr:
     result = newNodeI(nkCall, n.info)
-    result.add newIdentNode(getIdent(if n.kind == nkBracketExpr:"[]" else:"{}"),
+    result.add newIdentNode(getIdent("[]"), n.info)
-                            n.info)
+    for i in 0 ..< n.len: result.add(n[i])
+    let n0 = semTemplBody(c, n.sons[0])
+    withBracketExpr c, n0:
+      result = semTemplBodySons(c, result)
+  of nkCurlyExpr:
+    result = newNodeI(nkCall, n.info)
+    result.add newIdentNode(getIdent("{}"), n.info)
     for i in 0 ..< n.len: result.add(n[i])
     result = semTemplBodySons(c, result)
   of nkAsgn, nkFastAsgn:
@@ -465,19 +490,29 @@ proc semTemplBody(c: var TemplCtx, n: PNode): PNode =
 
     let k = a.kind
     case k
-    of nkBracketExpr, nkCurlyExpr:
+    of nkBracketExpr:
       result = newNodeI(nkCall, n.info)
-      result.add newIdentNode(getIdent(if k == nkBracketExpr:"[]=" else:"{}="),
+      result.add newIdentNode(getIdent("[]="), n.info)
-                              n.info)
+      for i in 0 ..< a.len: result.add(a[i])
+      result.add(b)
+      let a0 = semTemplBody(c, a.sons[0])
+      withBracketExpr c, a0:
+        result = semTemplBodySons(c, result)
+    of nkCurlyExpr:
+      result = newNodeI(nkCall, n.info)
+      result.add newIdentNode(getIdent("{}="), n.info)
       for i in 0 ..< a.len: result.add(a[i])
       result.add(b)
-    else:
-      result = n
       result = semTemplBodySons(c, result)
     else:
+      result = semTemplBodySons(c, n)
+  of nkCallKinds-{nkPostfix}:
+    result = semTemplBodySons(c, n)
+    if c.bracketExpr != nil and n.len == 2 and oprIsRoof(n.sons[0]):
+      result.add c.bracketExpr
+  of nkDotExpr, nkAccQuoted:
     # dotExpr is ambiguous: note that we explicitly allow 'x.TemplateParam',
     # so we use the generic code for nkDotExpr too
-    if n.kind == nkDotExpr or n.kind == nkAccQuoted:
     let s = qualifiedLookUp(c.c, n, {})
     if s != nil:
       # do not symchoice a quoted template parameter (bug #2390):
@@ -493,6 +528,8 @@ proc semTemplBody(c: var TemplCtx, n: PNode): PNode =
       else:
         return symChoice(c.c, n, s, scOpen)
     result = semTemplBodySons(c, n)
+  else:
+    result = semTemplBodySons(c, n)
 
 proc semTemplBodyDirty(c: var TemplCtx, n: PNode): PNode =
   result = n

compiler/transf.nim

@@ -139,7 +139,7 @@ proc transformVarSection(c: PTransf, v: PNode): PTransNode =
     if it.kind == nkCommentStmt:
       result[i] = PTransNode(it)
     elif it.kind == nkIdentDefs:
-      if it.sons[0].kind != nkSym: internalError(it.info, "transformVarSection")
+      if it.sons[0].kind == nkSym:
         internalAssert(it.len == 3)
         var newVar = copySym(it.sons[0].sym)
         incl(newVar.flags, sfFromGeneric)
@@ -156,6 +156,9 @@ proc transformVarSection(c: PTransf, v: PNode): PTransNode =
         defs[2] = transform(c, it.sons[2])
         newVar.ast = defs[2].PNode
         result[i] = defs
+      else:
+        # has been transformed into 'param.x' for closure iterators, so keep it:
+        result[i] = PTransNode(it)
     else:
       if it.kind != nkVarTuple:
         internalError(it.info, "transformVarSection: not nkVarTuple")

doc/lib.txt

@@ -122,7 +122,7 @@ String handling
   This module contains various string matchers for email addresses, etc.
 
 * `subexes <subexes.html>`_
-  This module implements advanted string substitution operations.
+  This module implements advanced string substitution operations.
 
 
 Generic Operating System Services

doc/subexes.txt

@@ -1,7 +1,7 @@
 Substitution Expressions (subex)
 ================================
 
-A *subex* (*Substitution Expression*) represents an advanted string
+A *subex* (*Substitution Expression*) represents an advanced string
 substitution. In contrast to a `regex`:idx: which deals with string analysis, a
 *subex* deals with string synthesis.
 

lib/pure/basic2d.nim

@@ -18,6 +18,8 @@ import strutils
 ##
 ## Quick start example:
 ##
+## .. code-block:: nim
+##
 ##   # Create a matrix which first rotates, then scales and at last translates
 ##
 ##   var m:Matrix2d=rotate(DEG90) & scale(2.0) & move(100.0,200.0)
@@ -93,11 +95,11 @@ let
   IDMATRIX*:Matrix2d=matrix2d(1.0,0.0,0.0,1.0,0.0,0.0)
     ## Quick access to an identity matrix
   ORIGO*:Point2d=point2d(0.0,0.0)
-    ## Quick acces to point (0,0)
+    ## Quick access to point (0,0)
   XAXIS*:Vector2d=vector2d(1.0,0.0)
-    ## Quick acces to an 2d x-axis unit vector
+    ## Quick access to an 2d x-axis unit vector
   YAXIS*:Vector2d=vector2d(0.0,1.0)
-    ## Quick acces to an 2d y-axis unit vector
+    ## Quick access to an 2d y-axis unit vector
 
 
 # ***************************************

lib/pure/basic3d.nim

@@ -23,6 +23,8 @@ import times
 ##
 ## Quick start example:
 ##
+## .. code-block:: nim
+##
 ##   # Create a matrix which first rotates, then scales and at last translates
 ##
 ##   var m:Matrix3d=rotate(PI,vector3d(1,1,2.5)) & scale(2.0) & move(100.0,200.0,300.0)

lib/pure/unicode.nim

@@ -1319,15 +1319,44 @@ proc reversed*(s: string): string =
 
   reverseUntil(len(s))
 
+proc graphemeLen*(s: string; i: Natural): Natural =
+  ## The number of bytes belonging to 's[i]' including following combining
+  ## characters.
+  var j = i.int
+  var r, r2: Rune
+  if j < s.len:
+    fastRuneAt(s, j, r, true)
+    result = j-i
+    while j < s.len:
+      fastRuneAt(s, j, r2, true)
+      if not isCombining(r2): break
+      result = j-i
+
+proc lastRune*(s: string; last: int): (Rune, int) =
+  ## length of the last rune in 's[0..last]'. Returns the rune and its length
+  ## in bytes.
+  if s[last] <= chr(127):
+    result = (Rune(s[last]), 1)
+  else:
+    var L = 0
+    while last-L >= 0 and ord(s[last-L]) shr 6 == 0b10: inc(L)
+    inc(L)
+    var r: Rune
+    fastRuneAt(s, last-L, r, false)
+    result = (r, L)
+
 when isMainModule:
   let
     someString = "öÑ"
     someRunes = @[runeAt(someString, 0), runeAt(someString, 2)]
     compared = (someString == $someRunes)
-  assert compared == true
+  doAssert compared == true
 
-  assert reversed("Reverse this!") == "!siht esreveR"
+  doAssert reversed("Reverse this!") == "!siht esreveR"
-  assert reversed("先秦兩漢") == "漢兩秦先"
+  doAssert reversed("先秦兩漢") == "漢兩秦先"
-  assert reversed("as⃝df̅") == "f̅ds⃝a"
+  doAssert reversed("as⃝df̅") == "f̅ds⃝a"
-  assert reversed("a⃞b⃞c⃞") == "c⃞b⃞a⃞"
+  doAssert reversed("a⃞b⃞c⃞") == "c⃞b⃞a⃞"
-  assert len(toRunes("as⃝df̅")) == runeLen("as⃝df̅")
+  doAssert len(toRunes("as⃝df̅")) == runeLen("as⃝df̅")
+  const test = "as⃝"
+  doAssert lastRune(test, test.len-1)[1] == 3
+  doAssert graphemeLen("è", 0) == 2

web/news.txt

@@ -97,6 +97,7 @@ News
     to benchmark it.
   - ``strutils.formatFloat`` and ``formatBiggestFloat`` do not depend on the C
     locale anymore and now take an optional ``decimalSep = '.'`` parameter.
+  - Added ``unicode.lastRune``, ``unicode.graphemeLen``.
 
 
   Compiler Additions