MensBeam
/
Lit
3
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

Tokenization progress

main
Dustin Wilson 3 years ago
parent
4ed8ffcd26
commit
ad23bf4c4d
2 changed files with 155 additions and 53 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 16
      lib/Grammar.php
  2. 192
      lib/Tokenizer.php

16
lib/Grammar.php
View File

@ -29,7 +29,7 @@ use dW\Lit\Grammar\{
*/
class Grammar {
use FauxReadOnly;
protected ?string $_contentRegex;
protected ?string $_contentName;
protected ?string $_firstLineMatch;
protected ?InjectionList $_injections;
protected ?string $_name;
@ -37,14 +37,12 @@ class Grammar {
protected ?PatternList $_patterns;
protected ?Repository $_repository;
protected ?string $_scopeName;
protected ?string $_contentScopeName;
public function __construct(?string $scopeName = null, ?string $contentScopeName = null, ?PatternList $patterns = null, ?string $name = null, ?string $contentRegex = null, ?string $firstLineMatch = null, ?InjectionList $injections = null, ?Repository $repository = null, ?Grammar $ownerGrammar = null) {
public function __construct(?string $scopeName = null, ?PatternList $patterns = null, ?string $name = null, ?string $firstLineMatch = null, ?InjectionList $injections = null, ?Repository $repository = null, ?Grammar $ownerGrammar = null) {
$this->_name = $name;
$this->_scopeName = $scopeName;
$this->_patterns = $patterns;
$this->_contentRegex = $contentRegex;
$this->_firstLineMatch = $firstLineMatch;
$this->_injections = $injections;
$this->_repository = $repository;
@ -98,14 +96,6 @@ class Grammar {
$this->_name = $json['name'] ?? null;
$this->_scopeName = $json['scopeName'];
$this->_contentScopeName = $json['contentScopeName'] ?? null;
if (isset($json['contentRegex'])) {
$value = str_replace('/', '\/', $json['contentRegex']);
$this->_contentRegex = $value;
} else {
$this->_contentRegex = null;
}
if (isset($json['firstLineMatch'])) {
$value = str_replace('/', '\/', $json['firstLineMatch']);
@ -164,7 +154,6 @@ class Grammar {
$p = [
'ownerGrammar' => $this,
'name' => null,
'contentName' => null,
'match' => null,
'patterns' => null,
'captures' => null,
@ -231,7 +220,6 @@ class Grammar {
foreach ($pattern as $key => $value) {
switch ($key) {
case 'name':
case 'contentName':
$p[$key] = $value;
$modified = true;
break;

192
lib/Tokenizer.php
View File

@ -24,10 +24,6 @@ class Tokenizer {
$this->grammar = $grammar;
$this->ruleStack = [ $this->grammar ];
$this->scopeStack = [ $this->grammar->scopeName ];
if ($this->grammar->contentScopeName !== null) {
$this->scopeStack[] = $this->grammar->contentScopeName;
}
}
@ -60,55 +56,173 @@ class Tokenizer {
return $match;
}
protected function _tokenize(string $inputLine, int $offset = 0): array {
$currentRules = end($this->ruleStack)->patterns->getIterator();
$currentRulesCount = count($currentRules);
$results = [];
$line = $inputLine;
protected function _tokenize(string $line, int &$offset = 0): array {
$tokens = [];
$lineLength = strlen($line);
for ($i = 0; $i < $currentRulesCount; $i++) {
while (true) {
$rule = $currentRules[$i];
if ($rule instanceof Pattern) {
if ($match = $this->getMatch($rule->match, $line, $offset)) {
$tokens = [];
unset($match[0]);
foreach ($match as $k => $m) {
if ($m[1] > $offset) {
$tokens[] = [
'scope' => $this->scopeStack,
'string' => substr($line, $offset, $m[1])
];
$offset = $m[1];
while (true) {
$currentRules = end($this->ruleStack)->patterns->getIterator();
$currentRulesCount = count($currentRules);
for ($i = 0; $i < $currentRulesCount; $i++) {
while (true) {
$rule = $currentRules[$i];
// If the rule is a Pattern and matches the line at the offset then tokenize the
// matches.
if ($rule instanceof Pattern && $match = $this->getMatch($rule->match, $line, $offset)) {
// First, remove the first entry in the match, the full
// match, leaving only the subpatterns.
//unset($match[0]);
// Add the name and contentName to the scope stack
// if present.
if ($rule->name !== null) {
$this->scopeStack[] = $rule->name;
}
if ($rule->contentName !== null) {
$this->scopeStack[] = $rule->contentName;
}
$wholeMatchCaptureScopeCount = 0;
if ($rule->captures !== null) {
// Iterate through each of the matched subpatterns and create tokens from the
// captures.
foreach ($match as $k => $m) {
if ($m[0] === '') {
continue;
}
// If the subpattern begins after the offset then create a token from the bits
// of the line in-between.
if ($m[1] > $offset) {
$scopeStack = $this->scopeStack;
// If this is the first capture, then the scopes added to the stack need to be
// removed from this token's scope stack as this will grab everything before
// this match began.
if ($k === 0) {
if ($rule->contentName !== null) {
array_pop($scopeStack);
}
if ($rule->name !== null) {
array_pop($scopeStack);
}
}
$tokens[] = [
'scopes' => $scopeStack,
'string' => substr($line, $offset, $m[1])
];
$offset = $m[1];
}
// The first match is the whole match, and if there are captures for it the name
// and contentName should be added to the stack regardless of whether it has
// patterns or not. However, keep count of how many were added to the stack so
// they may be removed when this rule has finished tokenizing.
if ($k === 0) {
if (!isset($rule->captures[0])) {
continue;
}
if ($rule->captures[0]->name !== null) {
$this->scopeStack[] = $rule->captures[0]->name;
$wholeMatchCaptureScopeCount++;
}
if ($rule->captures[0]->contentName !== null) {
$this->scopeStack[] = $rule->captures[0]->contentName;
$wholeMatchCaptureScopeCount++;
}
}
// If the capture rule has patterns of its own then
// those must be matched, too.
if ($rule->captures[$k]->patterns !== null) {
$this->ruleStack[] = $rule->captures[$k];
// The scope stack for the whole match is handled above, so only handle that for
// other captures.
if ($k !== 0) {
if ($rule->captures->name !== null) {
$this->scopeStack[] = $rule->captures[$k]->name;
}
if ($rule->captures->contentName !== null) {
$this->scopeStack[] = $rule->captures[$k]->contentName;
}
}
$tokens = [ ...$tokens, ...$this->_tokenize($line, $offset) ];
// The scope stack for the whole match is handled above, so only handle that for
// other captures.
if ($k !== 0) {
if ($rule->captures[$k]->contentName !== null) {
array_pop($this->scopeStack);
}
if ($rule->captures[$k]->name !== null) {
array_pop($this->scopeStack);
}
}
array_pop($this->ruleStack);
} else {
$tokens[] = [
'scopes' => [ ...$this->scopeStack, $rule->captures[$k]->name ],
'string' => $m[0]
];
}
$offset = $m[1] + strlen($m[0]);
$firstCapture = false;
}
}
if ($rule->patterns !== null) {
$tokens = [ ...$tokens, ...$this->_tokenize($line, $offset) ];
}
$tokens[] = [
'scope' => [ ...$this->scopeStack, $rule->captures[$k]->name ],
'string' => $m[0]
];
$offset = $m[1] + strlen($m[0]);
// Remove the name and contentName from the scope stack if present.
if ($rule->contentName !== null) {
array_pop($this->scopeStack);
}
if ($rule->name !== null) {
array_pop($this->scopeStack);
}
// If the rule has a whole match capture (0) then remove its name and
// contentName, too.
$j = 0;
while ($j++ < $wholeMatchCaptureScopeCount) {
array_pop($this->scopeStack);
}
// And remove the rule from the rule stack, too.
array_pop($this->ruleStack);
echo "\n";
die(var_export($tokens));
break 2;
}
} elseif ($rule instanceof Reference && $obj = $rule->get()) {
if ($obj instanceof PatternList) {
$obj = $obj->getIterator();
} elseif ($obj instanceof Grammar) {
$obj = $obj->patterns->getIterator();
// Otherwise, if the rule is a Reference then retrieve its patterns, splice into
// the rule list, and reprocess the rule.
elseif ($rule instanceof Reference && $obj = $rule->get()) {
if ($obj instanceof PatternList) {
$obj = $obj->getIterator();
} elseif ($obj instanceof Grammar) {
$obj = $obj->patterns->getIterator();
}
array_splice($currentRules, $i, 1, $obj);
$currentRulesCount = count($currentRules);
continue;
}
array_splice($currentRules, $i, 1, $obj);
$currentRulesCount = count($currentRules);
continue;
break;
}
break;
}
break;
}
return $inputLine;
return $tokens;
}
}
Write Preview
Loading…
Cancel
Save