1: package Apache::run;
2:
3: sub evaluate {
4: my ($expression,$safeeval,$decls) = @_;
5: # print "inside2 evaluate $decls with $expression<br>\n";
6: # gerd's old method interpolates unset vars
7: # $safeeval->reval('return qq('.$expression.');');
8: unless (defined $expression) { return ''; }
9: my $result = '';
10: $@='';
11: $safeeval->reval('$_=q{'.$expression.'};');
12: if ($@ eq '') {
13: $safeeval->reval('{'.$decls.'$_=~s/(\$\{?[A-Za-z]\w*\}?)/(defined(eval($1))?eval($1):$1)/ge;}');
14: if ($@ eq '') {
15: $result = $safeeval->reval('return $_;');
16: } else {
17: &Apache::lonxml::error("substituion on:$expression:with:$decls:caused");
18: }
19: } else {
20: &Apache::lonxml::error("defining:$expression:caused");
21: }
22: if ($@ ne '') {&Apache::lonxml::error($@);}
23: return $result
24: }
25:
26: sub run {
27: my ($code,$safeeval) = @_;
28: # print "inside run\n";
29: $@='';
30: my $result=$safeeval->reval($code);
31: if ($@ ne '') {
32: &Apache::lonxml::error(":$code:caused");
33: &Apache::lonxml::error($@);
34: }
35: return $result;
36: }
37:
38: 1;
39: __END__;
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