[Qexo-general] Possible variable scoping bug

[Joseph Coffland]

Per Bother,

> Here's a workaround.  It looks like it may be broken in the CVS
> version (I'll take a look), but it works in 1.7.90.
> 
> $ cat /tmp/prop.xql
> declare variable $x { java.lang.System:getProperty("x", "unknown") };
> declare variable $y { java.lang.System:getProperty("y", "unknown") };
> "The value of x is ",$x, " while y is ",$y,"
> "
> 
> $ java -Dx='X-value' -jar kawa-1.7.90.jar -f /tmp/prop.xql
> The value of x is X-value while y is unknown

Your example worked fine using the kawa-1.7.90 release.  Then I had this
problem.

Add one line to your example:

declare variable $x { java.lang.System:getProperty("x", "unknown") };
declare variable $y { java.lang.System:getProperty("y", "unknown") };

let $test := "test" return
"The value of x is ",$x, " while y is ",$y,"
"

And I get this error:

gnu.mapping.UnboundSymbol: Unbound symbol x
        at
        gnu.expr.Interpreter.getDefaultSymbolValue(Interpreter.java:651)
        at gnu.expr.Interpreter.getSymbolValue(Interpreter.java:658)
        at atInteractiveLevel.apply(test.xql:5)
        at gnu.mapping.CallContext.runUntilDone(CallContext.java:289)
        at gnu.expr.ModuleExp.evalModule(ModuleExp.java:188)
        at kawa.Shell.run(Shell.java:233)
        at kawa.standard.load.loadSource(load.java:162)
        at kawa.standard.load.apply(load.java:275)
        at kawa.Shell.runFile(Shell.java:298)
        at kawa.repl.processArgs(repl.java:241)
        at kawa.repl.main(repl.java:660)

It seems that code inside the FLOWR expressions scope cannot reach up to
global scope.

Joseph
-- 
  Joseph Coffland
  address@hidden