PPLiteralObjectParser.st
changeset 0 739fe9b7253e
child 4 90de244a7fa2
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PPLiteralObjectParser.st	Thu Aug 18 20:56:17 2011 +0200
@@ -0,0 +1,35 @@
+"{ Package: 'squeak:petitparser' }"
+
+PPLiteralParser subclass:#PPLiteralObjectParser
+	instanceVariableNames:''
+	classVariableNames:''
+	poolDictionaries:''
+	category:'PetitParser-Parsers'
+!
+
+PPLiteralObjectParser comment:'A parser that accepts a single literal object, such as a character. This is the same as the predicate parser ''PPPredicateParser expect: literal'' but slightly more efficient.'
+!
+
+
+!PPLiteralObjectParser methodsFor:'operators'!
+
+caseInsensitive
+	"Answer a parser that can parse the receiver case-insensitive."
+	
+	literal asUppercase = literal asLowercase ifTrue: [ ^ self ].
+	^ PPPredicateObjectParser on: [ :value | literal sameAs: value ] message: message
+! !
+
+!PPLiteralObjectParser methodsFor:'parsing'!
+
+parseOn: aStream
+	^ (aStream atEnd not and: [ literal = aStream uncheckedPeek ])
+		ifFalse: [ PPFailure message: message at: aStream position ]
+		ifTrue: [ aStream next ]
+! !
+
+!PPLiteralObjectParser class methodsFor:'documentation'!
+
+version_SVN
+    ^ '$Id: PPLiteralObjectParser.st,v 1.1 2011-08-18 18:56:17 cg Exp $'
+! !