forked from https://github.com/symfony/symfony
3d30ff7677
This PR was squashed before being merged into the 5.1-dev branch.
Discussion
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[ExpressionLanguage] Added expression language syntax validator
| Q | A
| ------------- | ---
| Branch? | master
| Bug fix? | no
| New feature? | yes
| Deprecations? | no
| Tickets | #35700
| License | MIT
| Doc PR | N/A <!-- required for new features -->
Proposal implementation #35700
The current solution is a compromise between support complexity and cleanliness.
I tried different solutions to the issue. A beautiful solution was obtained only with full duplication of the parser code. That is unacceptable because parser complexity is quite high.
The main problem in this solution is that nodes instances are created which are then not used. I do not think that linter can be a bottleneck and will greatly affect performance. If this is corrected, the parser code becomes a bunch of if's.
JFI: I did not added parsing without variable names, because this breaks caching and potential location for vulnerabilities.
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