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=head1 NAME
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Repl::Spec::Type::CheckedHashType - A parameter guard for hashes.
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=head1 SYNOPSIS
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This type guard ensures that a hash was passed containing values
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of another nested type guard provided by the user. An example: a hash of integers
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is ensured by creating a CheckedHashType with nested IntegerType.
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The guards can be nested arbitrarily to obtain a guard for whatever complex nested type.
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12
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=head1 DESCRIPTION
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=head1 Methods
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=over 4
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=item C
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Parameters: A nested guard that will be applied to the values of the hash.
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=item C
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Parameters: A single expression.
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Returns: A new hash where the values are converted by the nested type guard.
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=item C
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=head1 SEE ALSO
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=cut
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42
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package Repl::Spec::Type::CheckedHashType;
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1
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use strict;
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2
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1
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32
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use warnings;
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1
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26
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use Carp;
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379
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# Parameter:
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# - The type of the hash values.
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sub new
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{
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1
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1
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1
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2
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my $invocant = shift;
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1
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33
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6
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my $class = ref($invocant) || $invocant;
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55
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1
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2
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my $eltyp = shift;
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1
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my $self= {TYPE=>$eltyp};
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1
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return bless $self, $class;
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}
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61
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sub guard
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{
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0
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0
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1
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my $self = shift;
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0
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my $arg = shift;
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66
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0
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my $eltyp = $self->{TYPE};
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67
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68
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0
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0
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if(ref($arg) eq 'HASH')
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{
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0
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my $result = {};
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0
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my $idx = 0;
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0
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foreach my $el (keys %$arg)
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{
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0
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my $val;
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0
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eval {$val = $eltyp->guard($arg->{$el})};
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0
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76
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0
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0
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croak sprintf("Expected %s but the value of element '%s' does not comply.\n%s.", $self->name(), $el, $@)if ($@);
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0
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$result->{$el} = $val;
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0
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$idx = $idx + 1;
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}
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0
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return $result;
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}
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else
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{
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0
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croak sprintf("Expected %s but received '%s'.", $self->name(), $arg);
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85
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}
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86
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}
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87
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88
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sub name
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89
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{
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90
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0
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0
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1
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my $self = shift;
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0
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my $eltyp = $self->{TYPE};
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0
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return sprintf("HASH of %s", $eltyp->name());
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93
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}
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94
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95
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1;
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