1 package Data::Query::ExprHelpers;
4 use Data::Query::Constants;
9 perl_scalar_value perl_operator Literal Identifier compose intersperse
12 sub intersperse { my $i = shift; my @i = map +($_, $i), @_; pop @i; @i }
14 sub perl_scalar_value {
17 subtype => { Perl => 'Scalar' },
19 $_[1] ? (value_meta => $_[1]) : ()
27 operator => { Perl => $op },
33 Join => [ qw(left right on outer) ],
34 Alias => [ qw(to from) ],
35 Operator => [ qw(operator args) ],
36 Select => [ qw(select from) ],
37 Where => [ qw(where from) ],
38 Order => [ qw(by reverse nulls from) ],
39 Group => [ qw(by from) ],
40 Delete => [ qw(where target) ],
41 Update => [ qw(set where target) ],
42 Insert => [ qw(names values target returning) ],
43 Slice => [ qw(offset limit from) ],
59 ($_[1] ? (values => $_[1]) : ())
65 type => DQ_IDENTIFIER,
70 foreach my $name (values %Data::Query::Constants::CONST) {
72 my $sub = "is_${name}";
75 $dq->{type} and $dq->{type} eq $name
78 if (my @map = @{$map{$name}||[]}) {
80 my $dq = { type => $name };
82 $dq->{$map[$_]} = $_[$_] if defined $_[$_];
85 if (my $optional = $_[$#map+1]) {
86 unless(ref $optional eq 'HASH') {
88 Carp::croak("Not a hashreference");
90 @{$dq}{keys %$optional} = values %$optional;
99 sub is_Having { is_Where($_[0]) and is_Group($_[0]->{from}) }
101 push @EXPORT, 'is_Having';
105 require Scalar::Util;
106 my $type = Scalar::Util::reftype($code);
107 unless($type and $type eq 'CODE') {
109 Carp::croak("Not a subroutine reference");
113 return shift unless @_ > 1;
118 local(*{$caller."::a"}) = \my $a;
119 local(*{$caller."::b"}) = \my $b;
122 foreach (reverse @_) {