--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/PPScriptingTest.st Thu Aug 18 20:56:17 2011 +0200
@@ -0,0 +1,122 @@
+"{ Package: 'squeak:petitparser' }"
+
+PPAbstractParseTest subclass:#PPScriptingTest
+ instanceVariableNames:''
+ classVariableNames:''
+ poolDictionaries:''
+ category:'PetitTests-Tests'
+!
+
+PPScriptingTest comment:'These are some simple demo-scripts of parser combinators for the compiler construction course.
+http://www.iam.unibe.ch/~scg/Teaching/CC/index.html'
+!
+
+
+!PPScriptingTest methodsFor:'examples'!
+
+expressionInterpreter
+ "Same as #expressionInterpreter but with semantic actions."
+
+ | mul prim add dec |
+ add := PPUnresolvedParser new.
+ mul := PPUnresolvedParser new.
+ prim := PPUnresolvedParser new.
+ dec := ($0 ppMinus: $9) ==> [ :token | token codePoint - $0 codePoint ].
+ add def: ((mul , $+ asParser , add) ==> [ :nodes | (nodes at: 1) + (nodes at: 3) ])
+ / mul.
+ mul def: ((prim , $* asParser , mul) ==> [ :nodes | (nodes at: 1) * (nodes at: 3) ])
+ / prim.
+ prim def: (($( asParser , add , $) asParser) ==> [ :nodes | nodes at: 2 ])
+ / dec.
+ ^ add end
+
+ "Modified: / 19-12-2010 / 18:13:51 / Jan Kurs <kurs.jan@post.cz>"
+!
+
+expressionParser
+ "Simple demo of scripting an expression parser."
+
+ | mul prim add dec |
+ add := PPUnresolvedParser new.
+ mul := PPUnresolvedParser new.
+ prim := PPUnresolvedParser new.
+ dec := ($0 ppMinus: $9).
+ add def: (mul , $+ asParser , add)
+ / mul.
+ mul def: (prim , $* asParser , mul)
+ / prim.
+ prim def: ($( asParser , add , $) asParser)
+ / dec.
+ ^ add end
+
+ "Modified: / 19-12-2010 / 18:14:18 / Jan Kurs <kurs.jan@post.cz>"
+!
+
+straightLineParser
+ | goal stm stmList id char dec exp expList mulExp primExp nonzero num lower upper |
+ goal := PPUnresolvedParser new.
+ stmList := PPUnresolvedParser new.
+ stm := PPUnresolvedParser new.
+ exp := PPUnresolvedParser new.
+ expList := PPUnresolvedParser new.
+ mulExp := PPUnresolvedParser new.
+ primExp := PPUnresolvedParser new.
+
+ lower := $a ppMinus: $z.
+ upper := $A ppMinus: $Z.
+ char := lower / upper.
+ nonzero := $1 ppMinus: $9.
+ dec := $0 ppMinus: $9.
+ id := char, ( char / dec ) star.
+ num := $0 asParser / ( nonzero, dec star).
+
+ goal def: stmList end.
+ stmList def: stm , ( $; asParser, stm ) star.
+ stm def: ( id, ':=' asParser, exp )
+ / ( 'print' asParser, $( asParser, expList, $) asParser ).
+ exp def: mulExp, ( ( $+ asParser / $- asParser ), mulExp ) star.
+ expList def: exp, ( $, asParser, exp ) star.
+ mulExp def: primExp, ( ( $* asParser / $/ asParser ), primExp ) star.
+ primExp def: id
+ / num
+ / ( $( asParser, stmList, $, asParser, exp, $) asParser ).
+ ^ goal
+
+ "Modified: / 19-12-2010 / 18:15:14 / Jan Kurs <kurs.jan@post.cz>"
+! !
+
+!PPScriptingTest methodsFor:'tests'!
+
+testExpressionInterpreter
+ self
+ assert: self expressionInterpreter
+ parse: '2*(3+4)'
+ to: 14
+!
+
+testExpressionParser
+ self
+ assert: self expressionParser
+ parse: '2*(3+4)'
+ to: #($2 $* ($( ($3 $+ $4) $)))
+!
+
+testSLassign
+
+ self assert: self straightLineParser
+ parse: 'abc:=1'
+ to: #(#($a #($b $c) ':=' #(#(#($1 #()) #()) #())) #())
+!
+
+testSLprint
+ self
+ assert: self straightLineParser
+ parse: 'print(3,4)'
+ to: #(('print' $( ((($3 ()) ()) () (($, ((($4 ()) ()) ())))) $)) ())
+! !
+
+!PPScriptingTest class methodsFor:'documentation'!
+
+version_SVN
+ ^ '$Id: PPScriptingTest.st,v 1.1 2011-08-18 18:56:17 cg Exp $'
+! !