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Refine examples

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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@343150 c90b9560-bf6c-de11-be94-00142212c4b1
This commit is contained in:
Anatol Belski 2017-09-26 17:44:18 +00:00
parent 3be9d6602c
commit bb16317a12
1 changed files with 19 additions and 19 deletions
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38
reference/parle/examples.xml
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@ -12,17 +12,18 @@
<![CDATA[
<?php
use Parle\{Token, Lexer, LexerException};
use Parle\Token;
use Parle\Lexer;
use Parle\LexerException;
/* name => id */
$token = array(
"EOI" => 0,
"COMMA" => 1,
"CRLF" => 2,
"DECIMAL" => 3,
);
/* id => name */
$token_rev = array_flip($token);
$tokenIdToName = array_flip($token);
$lex = new Lexer;
$lex->push("[\x2c]", $token["COMMA"]);
@ -42,7 +43,7 @@ do {
throw new LexerException("Unknown token '{$tok->value}' at offset {$lex->marker}.");
}
echo "TOKEN: ", $token_rev[$tok->id], PHP_EOL;
echo "TOKEN: ", $tokenIdToName[$tok->id], PHP_EOL;
} while (Token::EOI != $tok->id);
]]>
</programlisting>
@ -91,11 +92,11 @@ $p->token("INTEGER");
$p->left("'+' '-' '*' '/'");
$p->push("start", "exp");
$add_idx = $p->push("exp", "exp '+' exp");
$sub_idx = $p->push("exp", "exp '-' exp");
$mul_idx = $p->push("exp", "exp '*' exp");
$div_idx = $p->push("exp", "exp '/' exp");
$int_idx = $p->push("exp", "INTEGER");
$prod_add = $p->push("exp", "exp '+' exp");
$prod_sub = $p->push("exp", "exp '-' exp");
$prod_mul = $p->push("exp", "exp '*' exp");
$prod_div = $p->push("exp", "exp '/' exp");
$p->push("exp", "INTEGER"); /* Production index unused. */
$p->build();
@ -134,22 +135,22 @@ foreach ($exp as $in) {
break;
case Parser::ACTION_REDUCE:
switch ($p->reduceId) {
case $add_idx:
case $prod_add:
$l = $p->sigil(0);
$r = $p->sigil(2);
echo "$l + $r = " . ($l + $r) . "\n";
break;
case $sub_idx:
case $prod_sub:
$l = $p->sigil(0);
$r = $p->sigil(2);
echo "$l - $r = " . ($l - $r) . "\n";
break;
case $mul_idx:
case $prod_mul:
$l = $p->sigil(0);
$r = $p->sigil(2);
echo "$l * $r = " . ($l * $r) . "\n";
break;
case $div_idx:
case $prod_div:
$l = $p->sigil(0);
$r = $p->sigil(2);
echo "$l / $r = " . ($l / $r) . "\n";
@ -175,8 +176,8 @@ $p = new Parser;
$p->token("WORD");
$p->push("START", "SENTENCE");
$p->push("SENTENCE", "WORDS");
$words_idx = $p->push("WORDS", "WORDS WORD");
$word_idx = $p->push("WORDS", "WORD");
$prod_word_0 = $p->push("WORDS", "WORDS WORD");
$prod_word_1 = $p->push("WORDS", "WORD");
$p->build();
$lex = new Lexer;
@ -193,20 +194,19 @@ do {
break;
case Parser::ACTION_SHIFT:
case Parser::ACTION_GOTO:
case Parser::ACTION_ACCEPT:
/* var_dump($p->trace());*/
break;
case Parser::ACTION_REDUCE:
$rid = $p->reduceId();
if ($rid == $word_idx) {
if ($rid == $prod_word_1) {
var_dump($p->sigil(0));
} if ($rid == $words_idx) {
} if ($rid == $prod_word_0) {
var_dump($p->sigil(1));
}
break;
}
$p->advance();
} while (Parser::ACTION_ERROR != $p->action && Parser::ACTION_ACCEPT != $p->action);
} while (Parser::ACTION_ACCEPT != $p->action);
]]>
</programlisting>
</example>