X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDevel%2FDeclare%2FContext%2FSimple.pm;h=488b8dc5c320b8a5e09c754cd3c140008b391d72;hb=dfd7e678f3e7e1626b87cc3c908aa7ccd7196bdd;hp=268514cef18bd9bfd69ee671f9c8b2681e2b1f88;hpb=e7be1784afaeb943f278a4249d5000bd2b706f11;p=p5sagit%2FDevel-Declare.git

diff --git a/lib/Devel/Declare/Context/Simple.pm b/lib/Devel/Declare/Context/Simple.pm
index 268514c..488b8dc 100644
--- a/lib/Devel/Declare/Context/Simple.pm
+++ b/lib/Devel/Declare/Context/Simple.pm
@@ -1,101 +1,292 @@
 package Devel::Declare::Context::Simple;
 
-use Devel::Declare ();
-use Scope::Guard;
 use strict;
 use warnings;
+use Devel::Declare ();
+use B::Hooks::EndOfScope;
+use Carp qw/confess/;
+
+our $VERSION = '0.006016';
 
 sub new {
-    my $class = shift;
-    bless {@_}, $class;
+  my $class = shift;
+  bless {@_}, $class;
 }
 
 sub init {
-    my $ctx = shift;
-    @{$ctx}{ qw(Declarator Offset) } = @_;
-    $ctx;
+  my $self = shift;
+  @{$self}{ qw(Declarator Offset WarningOnRedefined) } = @_;
+  return $self;
+}
+
+sub offset {
+  my $self = shift;
+  return $self->{Offset}
+}
+
+sub inc_offset {
+  my $self = shift;
+  $self->{Offset} += shift;
 }
 
-sub offset : lvalue { shift->{Offset}; }
-sub declarator { shift->{Declarator} }
+sub declarator {
+  my $self = shift;
+  return $self->{Declarator}
+}
+
+sub warning_on_redefine {
+  my $self = shift;
+  return $self->{WarningOnRedefined}
+}
 
 sub skip_declarator {
-    my $ctx = shift;
-    $ctx->offset += Devel::Declare::toke_move_past_token( $ctx->offset );
+  my $self = shift;
+  my $decl = $self->declarator;
+  my $len = Devel::Declare::toke_scan_word($self->offset, 0);
+  confess "Couldn't find declarator '$decl'"
+    unless $len;
+
+  my $linestr = $self->get_linestr;
+  my $name = substr($linestr, $self->offset, $len);
+  confess "Expected declarator '$decl', got '${name}'"
+    unless $name eq $decl;
+
+  $self->inc_offset($len);
 }
 
 sub skipspace {
-    my $ctx = shift;
-    $ctx->offset += Devel::Declare::toke_skipspace( $ctx->offset );
+  my $self = shift;
+  $self->inc_offset(Devel::Declare::toke_skipspace($self->offset));
+}
+
+sub get_linestr {
+  my $self = shift;
+  my $line = Devel::Declare::get_linestr();
+  return $line;
+}
+
+sub set_linestr {
+  my $self = shift;
+  my ($line) = @_;
+  Devel::Declare::set_linestr($line);
 }
 
 sub strip_name {
-    my $ctx = shift;
-    $ctx->skipspace;
-    if( my $len = Devel::Declare::toke_scan_word( $ctx->offset, 1 ) ) {
-        my $linestr = Devel::Declare::get_linestr();
-        my $name = substr( $linestr, $ctx->offset, $len );
-        substr( $linestr, $ctx->offset, $len ) = '';
-        Devel::Declare::set_linestr($linestr);
-        return $name;
-    }
-    return;
+  my $self = shift;
+  $self->skipspace;
+  if (my $len = Devel::Declare::toke_scan_word( $self->offset, 1 )) {
+    my $linestr = $self->get_linestr();
+    my $name = substr( $linestr, $self->offset, $len );
+    substr( $linestr, $self->offset, $len ) = '';
+    $self->set_linestr($linestr);
+    return $name;
+  }
+
+  $self->skipspace;
+  return;
+}
+
+sub strip_ident {
+  my $self = shift;
+  $self->skipspace;
+  if (my $len = Devel::Declare::toke_scan_ident( $self->offset )) {
+    my $linestr = $self->get_linestr();
+    my $ident = substr( $linestr, $self->offset, $len );
+    substr( $linestr, $self->offset, $len ) = '';
+    $self->set_linestr($linestr);
+    return $ident;
+  }
+
+  $self->skipspace;
+  return;
 }
 
 sub strip_proto {
-    my $ctx = shift;
-    $ctx->skipspace;
-
-    my $linestr = Devel::Declare::get_linestr();
-    if( substr( $linestr, $ctx->offset, 1 ) eq '(' ) {
-        my $length = Devel::Declare::toke_scan_str( $ctx->offset );
-        my $proto  = Devel::Declare::get_lex_stuff();
-        Devel::Declare::clear_lex_stuff();
-        $linestr = Devel::Declare::get_linestr();
-        substr( $linestr, $ctx->offset, $length ) = '';
+  my $self = shift;
+  $self->skipspace;
+
+  my $linestr = $self->get_linestr();
+  if (substr($linestr, $self->offset, 1) eq '(') {
+    my $length = Devel::Declare::toke_scan_str($self->offset);
+    my $proto = Devel::Declare::get_lex_stuff();
+    Devel::Declare::clear_lex_stuff();
+    $linestr = $self->get_linestr();
+
+    substr($linestr, $self->offset,
+      defined($length) ? $length : length($linestr)) = '';
+    $self->set_linestr($linestr);
+
+    return $proto;
+  }
+  return;
+}
+
+sub strip_names_and_args {
+  my $self = shift;
+  $self->skipspace;
+
+  my @args;
+
+  my $linestr = $self->get_linestr;
+  if (substr($linestr, $self->offset, 1) eq '(') {
+    # We had a leading paren, so we will now expect comma separated
+    # arguments
+    substr($linestr, $self->offset, 1) = '';
+    $self->set_linestr($linestr);
+    $self->skipspace;
+
+    # At this point we expect to have a comma-separated list of
+    # barewords with optional protos afterward, so loop until we
+    # run out of comma-separated values
+    while (1) {
+      # Get the bareword
+      my $thing = $self->strip_name;
+      # If there's no bareword here, bail
+      confess "failed to parse bareword. found ${linestr}"
+        unless defined $thing;
+
+      $linestr = $self->get_linestr;
+      if (substr($linestr, $self->offset, 1) eq '(') {
+        # This one had a proto, pull it out
+        push(@args, [ $thing, $self->strip_proto ]);
+      } else {
+        # This had no proto, so store it with an undef
+        push(@args, [ $thing, undef ]);
+      }
+      $self->skipspace;
+      $linestr = $self->get_linestr;
+
+      if (substr($linestr, $self->offset, 1) eq ',') {
+        # We found a comma, strip it out and set things up for
+        # another iteration
+        substr($linestr, $self->offset, 1) = '';
+        $self->set_linestr($linestr);
+        $self->skipspace;
+      } else {
+        # No comma, get outta here
+        last;
+      }
+    }
+
+    # look for the final closing paren of the list
+    if (substr($linestr, $self->offset, 1) eq ')') {
+      substr($linestr, $self->offset, 1) = '';
+      $self->set_linestr($linestr);
+      $self->skipspace;
+    }
+    else {
+      # fail if it isn't there
+      confess "couldn't find closing paren for argument. found ${linestr}"
+    }
+  } else {
+    # No parens, so expect a single arg
+    my $thing = $self->strip_name;
+    # If there's no bareword here, bail
+    confess "failed to parse bareword. found ${linestr}"
+      unless defined $thing;
+    $linestr = $self->get_linestr;
+    if (substr($linestr, $self->offset, 1) eq '(') {
+      # This one had a proto, pull it out
+      push(@args, [ $thing, $self->strip_proto ]);
+    } else {
+      # This had no proto, so store it with an undef
+      push(@args, [ $thing, undef ]);
+    }
+  }
+
+  return \@args;
+}
+
+sub strip_attrs {
+  my $self = shift;
+  $self->skipspace;
+
+  my $linestr = Devel::Declare::get_linestr;
+  my $attrs   = '';
+
+  if (substr($linestr, $self->offset, 1) eq ':') {
+    while (substr($linestr, $self->offset, 1) ne '{') {
+      if (substr($linestr, $self->offset, 1) eq ':') {
+        substr($linestr, $self->offset, 1) = '';
         Devel::Declare::set_linestr($linestr);
-        return $proto;
+
+        $attrs .= ':';
+      }
+
+      $self->skipspace;
+      $linestr = Devel::Declare::get_linestr();
+
+      if (my $len = Devel::Declare::toke_scan_word($self->offset, 0)) {
+        my $name = substr($linestr, $self->offset, $len);
+        substr($linestr, $self->offset, $len) = '';
+        Devel::Declare::set_linestr($linestr);
+
+        $attrs .= " ${name}";
+
+        if (substr($linestr, $self->offset, 1) eq '(') {
+          my $length = Devel::Declare::toke_scan_str($self->offset);
+          my $arg    = Devel::Declare::get_lex_stuff();
+          Devel::Declare::clear_lex_stuff();
+          $linestr = Devel::Declare::get_linestr();
+          substr($linestr, $self->offset, $length) = '';
+          Devel::Declare::set_linestr($linestr);
+
+          $attrs .= "(${arg})";
+        }
+      }
     }
-    return;
+
+    $linestr = Devel::Declare::get_linestr();
+  }
+
+  return $attrs;
 }
 
+
 sub get_curstash_name {
-    return Devel::Declare::get_curstash_name;
+  return Devel::Declare::get_curstash_name;
 }
 
 sub shadow {
-    my $ctx  = shift;
-    my $pack = $ctx->get_curstash_name;
-    Devel::Declare::shadow_sub( $pack . '::' . $ctx->declarator, $_[0] );
+  my $self = shift;
+  my $pack = $self->get_curstash_name;
+  Devel::Declare::shadow_sub( $pack . '::' . $self->declarator, $_[0] );
 }
 
 sub inject_if_block {
-    my $ctx    = shift;
-    my $inject = shift;
-    $ctx->skipspace;
-    my $linestr = Devel::Declare::get_linestr;
-    if( substr( $linestr, $ctx->offset, 1 ) eq '{' ) {
-        substr( $linestr, $ctx->offset + 1, 0 ) = $inject;
-        Devel::Declare::set_linestr($linestr);
-    }
+  my $self   = shift;
+  my $inject = shift;
+  my $before = shift || '';
+
+  $self->skipspace;
+
+  my $linestr = $self->get_linestr;
+  if (substr($linestr, $self->offset, 1) eq '{') {
+    substr($linestr, $self->offset + 1, 0) = $inject;
+    substr($linestr, $self->offset, 0) = $before;
+    $self->set_linestr($linestr);
+    return 1;
+  }
+  return 0;
 }
 
 sub scope_injector_call {
-    return ' BEGIN { ' . __PACKAGE__ . '::inject_scope }; ';
+  my $self = shift;
+  my $inject = shift || '';
+  return ' BEGIN { ' . ref($self) . "->inject_scope('${inject}') }; ";
 }
 
 sub inject_scope {
-    my $ctx = shift;
-    $^H |= 0x120000;
-    $^H{DD_METHODHANDLERS} = Scope::Guard->new(
-        sub {
-            my $linestr = Devel::Declare::get_linestr;
-            my $offset  = Devel::Declare::get_linestr_offset;
-            substr( $linestr, $offset, 0 ) = ';';
-            Devel::Declare::set_linestr($linestr);
-        }
-    );
+  my $class = shift;
+  my $inject = shift;
+  on_scope_end {
+      my $linestr = Devel::Declare::get_linestr;
+      return unless defined $linestr;
+      my $offset  = Devel::Declare::get_linestr_offset;
+      substr( $linestr, $offset, 0 ) = ';' . $inject;
+      Devel::Declare::set_linestr($linestr);
+  };
 }
 
 1;
-
+# vi:sw=2 ts=2