# HG changeset patch
# User Jan Vrany <jan.vrany@fit.cvut.cz>
# Date 1376576456 -7200
# Node ID 812d7cd107467720547f008d195f6cd3538efb67
# Parent  6cf0aa88857b54794cf95c4406db51fb16dde8f6
Added children nodes, better printOn: and some more documentation.

diff -r 6cf0aa88857b -r 812d7cd10746 ParseErrorNode.st
--- a/ParseErrorNode.st	Sat Aug 10 13:24:32 2013 +0200
+++ b/ParseErrorNode.st	Thu Aug 15 16:20:56 2013 +0200
@@ -12,7 +12,7 @@
 "{ Package: 'stx:libcomp' }"
 
 ParseNode subclass:#ParseErrorNode
-	instanceVariableNames:'errorString errorToken'
+	instanceVariableNames:'errorString errorToken children'
 	classVariableNames:''
 	poolDictionaries:''
 	category:'System-Compiler-Support'
@@ -32,6 +32,44 @@
  other person.  No title to or ownership of the software is
  hereby transferred.
 "
+!
+
+documentation
+"
+    ParseErrorNode represent an errorneous portion of the source code.
+    Error nodes are created by error-tolerant parser. So far the only
+    user is SmallSenseParser (https://bitbucket.org/janvrany/jv-smallsense).
+
+    Error nodes may have children which may not be error nodes. Such
+    children represent a part of the code that actuallu could be parsed.
+    Example:
+
+        printValue: value
+            Transcript show: (value printStringRadix: 12 
+            Transcript cr
+
+    The tolerant parser may create tree like:
+        statement (StatementNode)
+            #show: (MessageNode)
+                Transcript (ContantNode)
+                <<error>> (ParseErrorNode)
+                    #printStringRadix: (MessageNode)
+                        value (VariableNode)
+                        12 (ContantNode)
+        statement (StatementNode)
+            #cr (MessageNode)
+                Transcript (ContantNode)
+
+    [author:]
+        Jan Vrany <jan.vrany@fit.cvut.cz>
+
+    [instance variables:]
+
+    [class variables:]
+
+    [see also:]
+
+"
 ! !
 
 !ParseErrorNode class methodsFor:'instance creation'!
@@ -42,6 +80,17 @@
 
 !ParseErrorNode methodsFor:'accessing'!
 
+children
+    ^ children
+!
+
+children:aCollection
+    children := aCollection.
+    children do:[:each | each parent: self ].
+
+    "Modified: / 15-08-2013 / 11:43:44 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
 errorString
     ^ errorString
 !
@@ -81,19 +130,32 @@
 
 !ParseErrorNode methodsFor:'printing & storing'!
 
+printAllOn:aStream indent:indent
+    children do: [:each | each printAllOn:aStream indent:indent ].
+    self printOn:aStream indent:indent
+
+    "Created: / 15-08-2013 / 12:29:58 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+!
+
 printOn:aStream indent:indent
     "append a user printed representation of the receiver to aStream.
      The format is suitable for a human - not meant to be read back."
 
     aStream next: indent put: Character tab.
+    aStream nextPutAll:'"<< parse error here'.
+    errorString notNil ifTrue:[
+        aStream nextPutAll:': '.
+        aStream nextPutAll: errorString
+    ].
     errorToken notNil ifTrue:[
-        aStream nextPutAll: errorToken
-    ] ifFalse: [
-        aStream nextPutAll:'"<< parse error here >>"'
-    ]
+        aStream nextPutAll:' (error token: '.
+        aStream nextPutAll: errorToken.
+        aStream nextPutAll: ')'.
+    ].
+    aStream nextPutAll:'>>"'
 
     "Created: / 20-04-2005 / 14:21:46 / cg"
-    "Modified: / 08-03-2012 / 20:52:11 / Jan Vrany <jan.vrany@fit.cvut.cz>"
+    "Modified: / 15-08-2013 / 12:32:07 / Jan Vrany <jan.vrany@fit.cvut.cz>"
 ! !
 
 !ParseErrorNode methodsFor:'queries'!
@@ -116,9 +178,10 @@
 !ParseErrorNode class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libcomp/ParseErrorNode.st,v 1.6 2012-03-09 07:48:24 vrany Exp $'
+    ^ '$Header: /cvs/stx/stx/libcomp/ParseErrorNode.st,v 1.7 2013-08-15 14:20:56 vrany Exp $'
 !
 
 version_CVS
-    ^ '$Header: /cvs/stx/stx/libcomp/ParseErrorNode.st,v 1.6 2012-03-09 07:48:24 vrany Exp $'
+    ^ '$Header: /cvs/stx/stx/libcomp/ParseErrorNode.st,v 1.7 2013-08-15 14:20:56 vrany Exp $'
 ! !
+