From e21ca54b11409764e495530136376f1b8f309fcb Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Tue, 4 Apr 2017 12:20:43 +0200
Subject: [PATCH] assignments support ': stmtList' like let/var do

---
 compiler/parser.nim        | 8 +++++++-
 doc/grammar.txt            | 2 +-
 tests/parser/tletcolon.nim | 3 ++-
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/compiler/parser.nim b/compiler/parser.nim
index 46953de1e..e9dff25ac 100644
--- a/compiler/parser.nim
+++ b/compiler/parser.nim
@@ -1208,7 +1208,7 @@ proc parseMacroColon(p: var TParser, x: PNode): PNode =
 
 proc parseExprStmt(p: var TParser): PNode =
   #| exprStmt = simpleExpr
-  #|          (( '=' optInd expr )
+  #|          (( '=' optInd expr colonBody? )
   #|          / ( expr ^+ comma
   #|              doBlocks
   #|               / macroColon
@@ -1219,6 +1219,12 @@ proc parseExprStmt(p: var TParser): PNode =
     getTok(p)
     optInd(p, result)
     var b = parseExpr(p)
+    if p.tok.tokType == tkColon and p.tok.indent < 0:
+      if b.kind != nkEmpty:
+        let call = makeCall(b)
+        call.add parseDoBlock(p, parLineInfo(p))
+        parseDoBlocks(p, call)
+        b = call
     addSon(result, a)
     addSon(result, b)
   else:
diff --git a/doc/grammar.txt b/doc/grammar.txt
index f6b9b115f..f50045233 100644
--- a/doc/grammar.txt
+++ b/doc/grammar.txt
@@ -103,7 +103,7 @@ macroColon = ':' stmt? ( IND{=} 'of' exprList ':' stmt
                        | IND{=} 'except' exprList ':' stmt
                        | IND{=} 'else' ':' stmt )*
 exprStmt = simpleExpr
-         (( '=' optInd expr )
+         (( '=' optInd expr colonBody? )
          / ( expr ^+ comma
              doBlocks
               / macroColon
diff --git a/tests/parser/tletcolon.nim b/tests/parser/tletcolon.nim
index ec7c24106..6b86535c8 100644
--- a/tests/parser/tletcolon.nim
+++ b/tests/parser/tletcolon.nim
@@ -18,7 +18,8 @@ template y(val, body): untyped =
 proc mana =
   let foo = x:
     echo "boo"
-  var foo2 = y 3:
+  var foo2: int
+  foo2 = y 3:
     echo "3"
   echo foo, " ", foo2