Added an article about ExpressionLanguage AST #7831
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lyrixx
reviewed
Apr 24, 2017
| use Symfony\Component\ExpressionLanguage\ExpressionLanguage; | ||
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| $language = new ExpressionLanguage(); | ||
| $ast = $language->dump('1 + 2'); |
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Hi;
Actually, this method does not exist. You can get the AST like this:
<?php
require __DIR__.'/vendor/autoload.php';
use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
$ast = (new ExpressionLanguage())
->parse('var.a.b + 12', ['var'])
->getNodes()
;
dump($ast);And then you can dump the AST (as a string) dump($ast->dump());
Finally, Instead of getting a string, it's possible to get an array in order to manipulate it: dump($ast->toArray());
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Thanks for your help and for the examples! I've updated the article contents.
xabbuh
reviewed
Apr 28, 2017
| @@ -0,0 +1,47 @@ | |||
| .. index:: | |||
| single: AST; ExpressionLanguage | |||
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I think we should at least add "Abstract Syntax Tree" to the index.
xabbuh
reviewed
Apr 28, 2017
| Dumping the AST | ||
| --------------- | ||
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| Call the ``getNodes()`` method after parsing any expression to get its AST:: |
xabbuh
reviewed
Apr 28, 2017
| -------------------- | ||
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| The nodes of the AST can also be dumped into a PHP array of nodes to allow | ||
| manipulating them. Call the ``toArray()`` method to turn the AST into an array:: |
xabbuh
approved these changes
May 3, 2017
|
Thank you Javier. |
xabbuh
added a commit
that referenced
this pull request
May 12, 2017
…uiluz) This PR was squashed before being merged into the 3.2 branch (closes #7831). Discussion ---------- Added an article about ExpressionLanguage AST I need ExpressionLanguage experts to review the first part of the new article and to give me clues about how to write the second part. Thanks! Let's ping some experts in this: @lyrixx and @nicolas-grekas. This fixes #7185. Commits ------- a91a590 Added an article about ExpressionLanguage AST
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I need ExpressionLanguage experts to review the first part of the new article and to give me clues about how to write the second part. Thanks!
Let's ping some experts in this: @lyrixx and @nicolas-grekas.
This fixes #7185.