Lexer almost rewritten in perl
vitalif
parent
8cbbf07679
commit
5973f5159d
511
template.yp
511
template.yp
|
|
@ -1,15 +1,5 @@
|
|||
# Контекстно-свободная Parse::Yapp-грамматика шаблонизатора
|
||||
#
|
||||
# Для корректной работы нужен патченый LIME со следующими изменениями:
|
||||
# (*) Подменой лексемы 'lit' на 'str' в метаграмматике.
|
||||
# Это нужно, чтобы можно было юзать строковые лексемы типа '<!--'.
|
||||
# (*) Для корректной обработки ошибок нужно, чтобы метод eat() возвращал
|
||||
# false при ошибке и true при успехе. Т.к. подразумевается, что лексический
|
||||
# анализатор зависим от работы синтаксического, знает о его состоянии и
|
||||
# соответственно выдаёт либо лексемы "внутри" блоков кода, либо литералы
|
||||
# "вне" оных.
|
||||
# Взять таковой можно здесь: https://github.com/vitalif/lime
|
||||
#
|
||||
# {{ двойные скобки }} нужно исключительно чтобы маркеры начала и конца подстановки
|
||||
# были уникальны в грамматике. Вместо них обычно используются { одинарные }, а
|
||||
# выбор корректной лексемы - скобки или маркера - делает лексический анализатор.
|
||||
|
|
@ -22,6 +12,8 @@
|
|||
# Кстати:
|
||||
# * Олдстайл BEGIN .. END ликвидирован
|
||||
# * Возможно, нужно добавить в каком-то виде foreach ... as key => value
|
||||
#
|
||||
# P.S: Комментарии типа "#{" и "#}" служат, чтобы тупой Parse::Yapp понимал парные скобки
|
||||
|
||||
%start template
|
||||
|
||||
|
|
@ -92,14 +84,14 @@ chunk: literal {
|
|||
$_[2];
|
||||
}
|
||||
| '{{' exp '}}' {
|
||||
'$t .= ' . ($_[2][1] || !$_[0]->{template}->{options}->{auto_escape} ? $_[2][0] : $_[0]->{template}->compile_function($_[0]->{template}->{options}->{auto_escape}, [ $_[2] ])[0]) . ";\n";
|
||||
'$t .= ' . ($_[2][1] || !$_[0]->{template}->{options}->{auto_escape} ? $_[2][0] : $_[0]->{template}->compile_function($_[0]->{template}->{options}->{auto_escape}, [ $_[2] ])->[0]) . ";\n";
|
||||
}
|
||||
| error {
|
||||
'';
|
||||
}
|
||||
;
|
||||
code_chunk: c_if | c_set | c_fn | c_for | exp {
|
||||
'$t .= ' . ($_[1][1] || !$_[0]->{template}->{options}->{auto_escape} ? $_[1][0] : $_[0]->{template}->compile_function($_[0]->{template}->{options}->{auto_escape}, [ $_[1] ])[0]) . ";\n";
|
||||
'$t .= ' . ($_[1][1] || !$_[0]->{template}->{options}->{auto_escape} ? $_[1][0] : $_[0]->{template}->compile_function($_[0]->{template}->{options}->{auto_escape}, [ $_[1] ])->[0]) . ";\n";
|
||||
}
|
||||
;
|
||||
c_if: 'IF' exp '-->' chunks '<!--' 'END' {
|
||||
|
|
@ -138,8 +130,8 @@ c_fn: fn name '(' arglist ')' '=' exp {
|
|||
'name' => $_[2],
|
||||
'args' => $_[4],
|
||||
'body' => 'sub fn_'.$_[2]." () {\nreturn ".$_[7].";\n}\n",
|
||||
//'line' => $line, Ой, я чо - аргументы не юзаю?
|
||||
//'pos' => $pos,
|
||||
#'line' => $line, Ой, я чо - аргументы не юзаю?
|
||||
#'pos' => $pos,
|
||||
};
|
||||
'';
|
||||
}
|
||||
|
|
@ -148,8 +140,8 @@ c_fn: fn name '(' arglist ')' '=' exp {
|
|||
'name' => $_[2],
|
||||
'args' => $_[4],
|
||||
'body' => 'sub fn_'.$_[2]." () {\nmy \$stack = [];\nmy \$t = '';\n".$_[7]."\nreturn \$t;\n}\n",
|
||||
//'line' => $line,
|
||||
//'pos' => $pos,
|
||||
#'line' => $line,
|
||||
#'pos' => $pos,
|
||||
};
|
||||
'';
|
||||
}
|
||||
|
|
@ -263,7 +255,7 @@ nonbrace: '{' hash '}' {
|
|||
$_[0]->{template}->compile_function($_[1], $_[3]);
|
||||
}
|
||||
| name '(' gthash ')' {
|
||||
[ "\$self->{parent}->call_block('".addcslashes($_[1], "'\\")."', { ".$_[3]." }, '".addcslashes($this->template->lexer->errorinfo(), "'\\")."')", 1 ];
|
||||
[ "\$self->{parent}->call_block('".addcslashes($_[1], "'\\")."', { ".$_[3]." }, '".addcslashes($_[0]->{template}->{lexer}->errorinfo(), "'\\")."')", 1 ];
|
||||
}
|
||||
| name nonbrace {
|
||||
$_[0]->{template}->compile_function($_[1], [ $_[3] ]);
|
||||
|
|
@ -358,295 +350,254 @@ sub _Lexer
|
|||
|
||||
if ($parser->YYEndOfInput)
|
||||
{
|
||||
my $input = <STDIN>;
|
||||
return('', undef) unless $input;
|
||||
$parser->input($input);
|
||||
my $lex = $parser->{__lexer} = {
|
||||
options => {} ???,
|
||||
|
||||
# Current position in code
|
||||
codelen => strlen($input),
|
||||
pos => 0,
|
||||
lineno => 0,
|
||||
|
||||
# Preprocessed keyword tokens
|
||||
nchar => {},
|
||||
lens => [],
|
||||
keywords => { map { $_ => 1 } split / /, $keywords_str },
|
||||
|
||||
# Last directive start position, directive and substitution start/end counters
|
||||
last_start => 0,
|
||||
last_start_line => 0,
|
||||
in_code => 0,
|
||||
in_subst => 0,
|
||||
force_literal => 0,
|
||||
};
|
||||
foreach (split(/ /, $chartokens))
|
||||
{
|
||||
$lex->{nchar}{strlen($_)}{$_} = 1;
|
||||
}
|
||||
# Add code fragment finishing tokens
|
||||
$lex->{nchar}{strlen($lex->{options}->{end_code})}{$lex->{options}->{end_code}} = 1;
|
||||
if ($this->options->end_subst)
|
||||
{
|
||||
$lex->{nchar}{strlen($lex->{options}->{end_subst})}{$lex->{options}->{end_subst}} = 1;
|
||||
}
|
||||
# Reverse-sort lengths
|
||||
$lex->{lens} = [ sort { $b <=> $a } keys %{$lex->{nchar}} ];
|
||||
$parser->{__lexer} = undef;
|
||||
}
|
||||
|
||||
my $lex = $parser->{__lexer};
|
||||
|
||||
for (${$parser->YYInput})
|
||||
elsif (!$parser->{__lexer})
|
||||
{
|
||||
m/\G[ \t]*/gc;
|
||||
m/\G([0-9]+(?:\.[0-9]+)?)/gc and return('NUM',$1);
|
||||
m/\G([A-Za-z][A-Za-z0-9_]*)/gc and return('VAR',$1);
|
||||
m/\G(.)/gcs and return($1,$1);
|
||||
return('', undef);
|
||||
$parser->{__lexer} = new VMXTemplate::Lexer($parser, $parser->{YYInput}, $parser->{__options});
|
||||
}
|
||||
|
||||
return $parser->{__lexer}->read_token;
|
||||
}
|
||||
|
||||
sub _error
|
||||
{
|
||||
|
||||
}
|
||||
|
||||
__PACKAGE__->lexer(\&_Lexer);
|
||||
|
||||
class VMXTemplateLexer
|
||||
package VMXTemplate::Lexer;
|
||||
|
||||
sub new
|
||||
{
|
||||
function feed($parser)
|
||||
my $class = shift;
|
||||
$class = ref($class) || $class;
|
||||
my ($options) = @_;
|
||||
|
||||
my $self = bless {
|
||||
options => $options,
|
||||
|
||||
# Input
|
||||
code => '',
|
||||
eaten => '',
|
||||
lineno => 0,
|
||||
|
||||
# Preprocessed keyword tokens
|
||||
nchar => {},
|
||||
lens => [],
|
||||
keywords => { map { $_ => 1 } split / /, $keywords_str },
|
||||
|
||||
# Last directive start position, directive and substitution start/end counters
|
||||
last_start => 0,
|
||||
last_start_line => 0,
|
||||
in_code => 0,
|
||||
in_subst => 0,
|
||||
}, $class;
|
||||
|
||||
foreach (split(/ /, $chartokens))
|
||||
{
|
||||
try
|
||||
$self->{nchar}{length($_)}{$_} = 1;
|
||||
}
|
||||
# Add code fragment finishing tokens
|
||||
$self->{nchar}{length($self->{options}->{end_code})}{$self->{options}->{end_code}} = 1;
|
||||
if ($self->{options}->{end_subst})
|
||||
{
|
||||
$self->{nchar}{length($self->{options}->{end_subst})}{$self->{options}->{end_subst}} = 1;
|
||||
}
|
||||
# Reverse-sort lengths
|
||||
$self->{lens} = [ sort { $b <=> $a } keys %{$self->{nchar}} ];
|
||||
|
||||
return $self;
|
||||
}
|
||||
|
||||
sub eat
|
||||
{
|
||||
my $self = shift;
|
||||
my ($len) = @_;
|
||||
my $str = substr($self->{code}, 0, $len, '');
|
||||
$self->{done} .= $str;
|
||||
$self->{lineno} += ($str =~ tr/\n/\n/);
|
||||
return $str;
|
||||
}
|
||||
|
||||
sub skip_error
|
||||
{
|
||||
my ($self) = @_;
|
||||
$self->{code} = substr($self->{eaten}, $self->{last_start}+1, length($self->{eaten}), '') . $self->{code};
|
||||
$self->{lineno} = $self->{last_start_line};
|
||||
$self->{in_code} = $self->{in_subst} = 0;
|
||||
}
|
||||
|
||||
sub read_token
|
||||
{
|
||||
my $self = shift;
|
||||
if (!length $self->{code})
|
||||
{
|
||||
# End of code
|
||||
return;
|
||||
}
|
||||
if ($self->{in_code} <= 0 && $self->{in_subst} <= 0)
|
||||
{
|
||||
my $r;
|
||||
my $code_pos = index($self->{code}, $self->{options}->{begin_code});
|
||||
my $subst_pos = index($self->{code}, $self->{options}->{begin_subst});
|
||||
if ($code_pos == -1 && $subst_pos == -1)
|
||||
{
|
||||
$parser->reset();
|
||||
$in = false;
|
||||
while ($t = $this->read_token())
|
||||
# No more directives
|
||||
$r = [ 'literal', "'".addcslashes($self->eat(length $self->{code}), "'\\")."'" ];
|
||||
}
|
||||
elsif ($subst_pos == -1 || $code_pos >= 0 && $subst_pos > $code_pos)
|
||||
{
|
||||
# Code starts closer
|
||||
if ($code_pos > 0)
|
||||
{
|
||||
$success = $parser->eat($t[0], $t[1]);
|
||||
if (!$success)
|
||||
# We didn't yet reach the code beginning
|
||||
my $str = $self->eat($code_pos);
|
||||
if ($self->{options}->{eat_code_line})
|
||||
{
|
||||
// Pass $in from last step so we skip to the beginning
|
||||
// of directive even if it just ended and $this->in_* == 0
|
||||
$this->skip_error(end($parser->parser->errors), $in);
|
||||
}
|
||||
$in = $this->in_code || $this->in_subst;
|
||||
}
|
||||
$parser->eat_eof();
|
||||
}
|
||||
catch (parse_error $e)
|
||||
{
|
||||
$this->options->error($e->getMessage());
|
||||
}
|
||||
}
|
||||
|
||||
function set_code($code)
|
||||
{
|
||||
$this->code = $code;
|
||||
$this->codelen = strlen($this->code);
|
||||
$this->pos = $this->lineno = 0;
|
||||
}
|
||||
|
||||
function errorinfo()
|
||||
{
|
||||
$linestart = strrpos($this->code, "\n", $this->pos-$this->codelen-1) ?: -1;
|
||||
$lineend = strpos($this->code, "\n", $this->pos) ?: $this->codelen;
|
||||
$line = substr($this->code, $linestart+1, $this->pos-$linestart-1);
|
||||
$line .= '^^^';
|
||||
$line .= substr($this->code, $this->pos, $lineend-$this->pos);
|
||||
return " in {$this->options->input_filename}, line ".($this->lineno+1).", byte {$this->pos}, marked by ^^^ in $line";
|
||||
}
|
||||
|
||||
function warn($text)
|
||||
{
|
||||
$this->options->error($text.$this->errorinfo());
|
||||
}
|
||||
|
||||
/**
|
||||
* Skip a directive
|
||||
*/
|
||||
function skip_error($e, $force = false)
|
||||
{
|
||||
if (substr($e, 0, 18) !== 'error not expected')
|
||||
{
|
||||
$this->warn($e);
|
||||
if ($this->in_code || $this->in_subst || $force)
|
||||
{
|
||||
$this->in_code = $this->in_subst = 0;
|
||||
$this->pos = $this->last_start;
|
||||
$this->lineno = $this->last_start_line;
|
||||
$this->force_literal = 1;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Read next token from the stream
|
||||
* Returns array($token, $value) or false for EOF
|
||||
*/
|
||||
sub _Lexer
|
||||
{
|
||||
if ($this->pos >= $this->codelen)
|
||||
{
|
||||
// End of code
|
||||
return false;
|
||||
}
|
||||
if ($this->in_code <= 0 && $this->in_subst <= 0)
|
||||
{
|
||||
$code_pos = strpos($this->code, $this->options->begin_code, $this->pos+$this->force_literal);
|
||||
$subst_pos = strpos($this->code, $this->options->begin_subst, $this->pos+$this->force_literal);
|
||||
$this->force_literal = 0;
|
||||
if ($code_pos === false && $subst_pos === false)
|
||||
{
|
||||
$r = array('literal', "'".addcslashes(substr($this->code, $this->pos), "'\\")."'");
|
||||
$this->lineno += substr_count($r[1], "\n");
|
||||
$this->pos = $this->codelen;
|
||||
}
|
||||
elseif ($subst_pos === false || $code_pos !== false && $subst_pos > $code_pos)
|
||||
{
|
||||
// Code starts closer
|
||||
if ($code_pos > $this->pos)
|
||||
{
|
||||
// We didn't yet reach the code beginning
|
||||
$str = substr($this->code, $this->pos, $code_pos-$this->pos);
|
||||
if ($this->options->eat_code_line)
|
||||
{
|
||||
$str = preg_replace('/\n[ \t]*$/s', "\n", $str);
|
||||
}
|
||||
$r = array('literal', "'".addcslashes($str, "'\\")."'");
|
||||
$this->lineno += substr_count($r[1], "\n");
|
||||
$this->pos = $code_pos;
|
||||
}
|
||||
elseif ($code_pos !== false)
|
||||
{
|
||||
// We are at the code beginning ($this->pos == $code_pos)
|
||||
$i = $this->pos+strlen($this->options->begin_code);
|
||||
while ($i < $this->codelen && (($c = $this->code{$i}) == ' ' || $c == "\t"))
|
||||
{
|
||||
$i++;
|
||||
}
|
||||
if ($i < $this->codelen && $this->code{$i} == '#')
|
||||
{
|
||||
// Strip comment
|
||||
$i = strpos($this->code, $this->options->end_code, $i);
|
||||
$this->pos = $i ? $i+strlen($this->options->end_code) : $this->codelen;
|
||||
return $this->read_token();
|
||||
}
|
||||
$r = array('<!--', $this->options->begin_code);
|
||||
$this->last_start = $this->pos;
|
||||
$this->last_start_line = $this->lineno;
|
||||
$this->pos += strlen($this->options->begin_code);
|
||||
$this->in_code = 1;
|
||||
$str =~ s/\n[ \t]*$/\n/s;
|
||||
}
|
||||
$r = [ 'literal', "'".addcslashes($str, "'\\")."'" ];
|
||||
}
|
||||
else
|
||||
{
|
||||
// Substitution is closer
|
||||
if ($subst_pos > $this->pos)
|
||||
# We are at the code beginning
|
||||
my $i = length $self->{options}->{begin_code};
|
||||
if ($self->{code} =~ /^.{$i}([ \t]+)/s)
|
||||
{
|
||||
$r = array('literal', "'".addcslashes(substr($this->code, $this->pos, $subst_pos-$this->pos), "'\\")."'");
|
||||
$this->lineno += substr_count($r[1], "\n");
|
||||
$this->pos = $subst_pos;
|
||||
$i += length $1;
|
||||
}
|
||||
else
|
||||
if ($i < length($self->{code}) && substr($self->{code}, $i, 1) eq '#')
|
||||
{
|
||||
$r = array('{{', $this->options->begin_subst);
|
||||
$this->last_start = $this->pos;
|
||||
$this->last_start_line = $this->lineno;
|
||||
$this->pos++;
|
||||
$this->in_subst = 1;
|
||||
# Strip comment and retry
|
||||
$i = index($self->{code}, $self->{options}->{end_code}, $i);
|
||||
$i = $i >= 0 ? $i+length($self->{options}->{end_code}) : length $self->{code};
|
||||
$self->eat($i);
|
||||
return $self->read_token();
|
||||
}
|
||||
$r = [ '<!--', $self->{options}->{begin_code} ];
|
||||
$self->{last_start} = length $self->{eaten};
|
||||
$self->{last_start_line} = $self->{lineno};
|
||||
$self->eat(length $self->{options}->{begin_code});
|
||||
$self->{in_code} = 1;
|
||||
}
|
||||
return $r;
|
||||
}
|
||||
while ($this->pos < $this->codelen)
|
||||
{
|
||||
// Skip whitespace
|
||||
$t = $this->code{$this->pos};
|
||||
if ($t == "\n")
|
||||
$this->lineno++;
|
||||
elseif ($t != "\t" && $t != ' ')
|
||||
break;
|
||||
$this->pos++;
|
||||
}
|
||||
if ($this->pos >= $this->codelen)
|
||||
{
|
||||
// End of code
|
||||
return false;
|
||||
}
|
||||
if (preg_match('#[a-z_][a-z0-9_]*#Ais', $this->code, $m, 0, $this->pos))
|
||||
{
|
||||
$this->pos += strlen($m[0]);
|
||||
if (isset($this->keywords[$l = strtoupper($m[0])]))
|
||||
{
|
||||
// Keyword
|
||||
return array($l, $m[0]);
|
||||
}
|
||||
// Identifier
|
||||
return array('name', $m[0]);
|
||||
}
|
||||
elseif (preg_match(
|
||||
'/((\")(?:[^\"\\\\]+|\\\\.)*\"|\'(?:[^\'\\\\]+|\\\\.)*\''.
|
||||
'|0\d+|\d+(\.\d+)?|0x\d+)/Ais', $this->code, $m, 0, $this->pos))
|
||||
{
|
||||
// String or numeric non-negative literal
|
||||
$t = $m[1];
|
||||
if (isset($m[2]))
|
||||
{
|
||||
$t = str_replace('$', '\\$', $t);
|
||||
}
|
||||
$this->pos += strlen($m[0]);
|
||||
return array('literal', $t);
|
||||
}
|
||||
else
|
||||
{
|
||||
// Special characters
|
||||
foreach ($this->lens as $l)
|
||||
# Substitution is closer
|
||||
if ($subst_pos > 0)
|
||||
{
|
||||
$a = $this->nchar[$l];
|
||||
$t = substr($this->code, $this->pos, $l);
|
||||
if (isset($a[$t]))
|
||||
{
|
||||
$this->pos += $l;
|
||||
if ($this->in_code)
|
||||
{
|
||||
$this->in_code += ($t === $this->options->begin_code);
|
||||
$this->in_code -= ($t === $this->options->end_code);
|
||||
if (!$this->in_code)
|
||||
{
|
||||
if ($this->options->eat_code_line)
|
||||
{
|
||||
$p = $this->pos;
|
||||
while ($p < $this->codelen && (($c = $this->code{$p}) == ' ' || $c == "\t" || $c == "\r"))
|
||||
{
|
||||
$p++;
|
||||
}
|
||||
if ($p < $this->codelen && $this->code{$p} == "\n")
|
||||
{
|
||||
$p++;
|
||||
if ($p < $this->codelen && $this->code{$p} == "\r")
|
||||
{
|
||||
$p++;
|
||||
}
|
||||
$this->pos = $p;
|
||||
}
|
||||
}
|
||||
return array('-->', $t);
|
||||
}
|
||||
}
|
||||
elseif ($this->in_subst)
|
||||
{
|
||||
$this->in_subst += ($t === $this->options->begin_subst);
|
||||
$this->in_subst -= ($t === $this->options->end_subst);
|
||||
if (!$this->in_subst)
|
||||
{
|
||||
return array('}}', $t);
|
||||
}
|
||||
}
|
||||
return array($t, false);
|
||||
}
|
||||
$r = [ 'literal', "'".addcslashes($self->eat($subst_pos), "'\\")."'" ];
|
||||
}
|
||||
else
|
||||
{
|
||||
$r = [ '{{', $self->{options}->{begin_subst} ];
|
||||
$self->{last_start} = length $self->{eaten};
|
||||
$self->{last_start_line} = $self->{lineno};
|
||||
$self->eat(length $self->{options}->{begin_subst});
|
||||
$self->{in_subst} = 1;
|
||||
}
|
||||
// Unknown character
|
||||
$this->skip_error(
|
||||
"Unexpected character '".$this->code{$this->pos}."'"
|
||||
);
|
||||
return array('error', false);
|
||||
}
|
||||
return @$r;
|
||||
}
|
||||
# Skip whitespace
|
||||
if ($self->{code} =~ /^(\s+)/)
|
||||
{
|
||||
$self->eat(length $1);
|
||||
}
|
||||
if (!length $self->{code})
|
||||
{
|
||||
# End of code
|
||||
return;
|
||||
}
|
||||
if ($self->{code} =~ /^([a-z_][a-z0-9_]*)/is)
|
||||
{
|
||||
my $l = $1;
|
||||
$self->eat(length $l);
|
||||
if (exists $self->{keywords}->{uc $l})
|
||||
{
|
||||
# Keyword
|
||||
return (uc $l, $l);
|
||||
}
|
||||
# Identifier
|
||||
return ('name', $l);
|
||||
}
|
||||
elsif ($self->{code} =~ /^(
|
||||
(\")(?:[^\"\\\\]+|\\\\.)*\" |
|
||||
\'(?:[^\'\\\\]+|\\\\.)*\' |
|
||||
0\d+ | \d+(\.\d+)? | 0x\d+)/xis)
|
||||
{
|
||||
# String or numeric non-negative literal
|
||||
my $t = $1;
|
||||
$self->eat(length $t);
|
||||
if ($2)
|
||||
{
|
||||
$t =~ s/\$/\\\$/gso;
|
||||
}
|
||||
return ('literal', $t);
|
||||
}
|
||||
else
|
||||
{
|
||||
# Special characters
|
||||
foreach my $l (@{$self->{lens}})
|
||||
{
|
||||
my $a = $self->{nchar}->{$l};
|
||||
my $t = substr($self->{code}, 0, $l);
|
||||
if (exists $a->{$t})
|
||||
{
|
||||
$self->eat($l);
|
||||
if ($self->{in_code})
|
||||
{
|
||||
$self->{in_code}++ if $t eq $self->{options}->{begin_code};
|
||||
$self->{in_code}-- if $t eq $self->{options}->{end_code};
|
||||
if (!$self->{in_code})
|
||||
{
|
||||
if ($self->{options}->{eat_code_line} &&
|
||||
$self->{code} =~ /^([ \t\r]+\n\r?)/so)
|
||||
{
|
||||
$self->eat(length $1);
|
||||
}
|
||||
return ('-->', $t);
|
||||
}
|
||||
}
|
||||
elsif ($self->{in_subst})
|
||||
{
|
||||
$self->{in_subst}++ if $t eq $self->{options}->{begin_subst};
|
||||
$self->{in_subst}-- if $t eq $self->{options}->{end_subst};
|
||||
if (!$self->{in_subst})
|
||||
{
|
||||
return ('}}', $t);
|
||||
}
|
||||
}
|
||||
return ($t, undef);
|
||||
}
|
||||
}
|
||||
# Unknown character
|
||||
$self->warn("Unexpected character '".substr($self->{code}, 0, 1)."'");
|
||||
return ('error', undef);
|
||||
}
|
||||
}
|
||||
|
||||
sub errorinfo
|
||||
{
|
||||
my $self = shift;
|
||||
my $linestart = rindex($self->{eaten}, "\n");
|
||||
my $lineend = index($self->{code}, "\n");
|
||||
$lineend = length($self->{code}) if $lineend < 0;
|
||||
my $line = substr($self->{eaten}, $linestart+1) . '^^^' . substr($self->{code}, 0, $lineend);
|
||||
my $charpos;
|
||||
{
|
||||
use bytes;
|
||||
$charpos = length $self->{eaten};
|
||||
}
|
||||
return ' in '.$self->{options}->{input_filename}.', line '.($self->{lineno}+1).
|
||||
', character '.$charpos.', marked by ^^^ in '.$line;
|
||||
}
|
||||
|
||||
sub warn
|
||||
{
|
||||
my $self = shift;
|
||||
my ($text) = @_;
|
||||
$self->{options}->error($text.$self->errorinfo());
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue