Basic unit testing facilities (suites, fixtures, cases)

Added: PNimrodNode.lineinfo for better error messages from macros
Added: seq.splice

For easier use from templates and macros, except stament now supports
the list of exception types to be supplied in nkBraket node (array literal).

lib/core/macros.nim

@@ -36,8 +36,8 @@ type
     nnkMacroDef, nnkTemplateDef, nnkIteratorDef, nnkOfBranch, 
     nnkElifBranch, nnkExceptBranch, nnkElse, nnkMacroStmt, 
     nnkAsmStmt, nnkPragma, nnkIfStmt, nnkWhenStmt, 
-    nnkForStmt, nnkWhileStmt, nnkCaseStmt, 
-    nnkVarSection, nnkLetSection, nnkConstSection, 
+    nnkForStmt, nnkWhileStmt, nnkCaseStmt, 
+    nnkVarSection, nnkLetSection, nnkConstSection, 
     nnkConstDef, nnkTypeSection, nnkTypeDef, 
     nnkYieldStmt, nnkTryStmt, nnkFinally, nnkRaiseStmt, 
     nnkReturnStmt, nnkBreakStmt, nnkContinueStmt, nnkBlockStmt, 
@@ -45,8 +45,8 @@ type
     nnkIncludeStmt, nnkCommentStmt, nnkStmtListExpr, nnkBlockExpr, 
     nnkStmtListType, nnkBlockType, nnkTypeOfExpr, nnkObjectTy, 
     nnkTupleTy, nnkRecList, nnkRecCase, nnkRecWhen, 
-    nnkRefTy, nnkPtrTy, nnkVarTy, 
-    nnkConstTy, nnkMutableTy,
+    nnkRefTy, nnkPtrTy, nnkVarTy, 
+    nnkConstTy, nnkMutableTy,
     nnkDistinctTy, 
     nnkProcTy, nnkEnumTy, nnkEnumFieldDef, nnkReturnToken
   TNimNodeKinds* = set[TNimrodNodeKind]
@@ -187,6 +187,8 @@ proc toStrLit*(n: PNimrodNode): PNimrodNode {.compileTime.} =
   ## in a string literal node
   return newStrLitNode(repr(n))
 
+proc lineinfo*(n: PNimrodNode): string {.magic: "NLineInfo".}
+
 proc toLisp*(n: PNimrodNode): string {.compileTime.} =
   ## Convert the AST `n` to a human-readable string
   ##
@@ -230,9 +232,9 @@ proc parseStmt*(s: string): stmt {.magic: "ParseStmtToAst".}
 
 proc getAst*(macroOrTemplate: expr): expr {.magic: "ExpandMacroToAst".}
   ## Obtains the AST nodes returned from a macro or template invocation.
-  ## Example:
-  ## 
-  ## .. code-block:: nimrod
+  ## Example:
+  ## 
+  ## .. code-block:: nimrod
   ##
   ##   macro FooMacro() = 
   ##     var ast = getAst(BarTemplate())