rasteiner/kel-compiler

There is no license information available for the latest version (dev-main) of this package.

dev-main 2021-11-19 15:43 UTC

Requires

• php: ^8.0
• antlr/antlr4-php-runtime: dev-master

Requires (Dev)

• phpunit/phpunit: ^9

Unknown License

• Roman Steiner

README

This parser only generates an AST for "Kirby Expression Language", which is used by Kirby's "calculated" field plugin to live evaluate expressions in the panel.

Usage example

The following example will evaluate the expression 1 + 2 and print the JSON encoded AST.

use rasteiner\KEL\Compiler;

$parser = new Compiler();
$ast = $parser->parse('1+2');

echo json_encode($ast);

Contribute

AST Classes

If you change the list of AST classes, you need to update the composer autoloader by running the following command:

composer dumpautoload -o

Generate Parser Code

You need to have antlr4 installed. The command to generate the parser code from the root directory is:

antlr4 -o src/KEL/generated -package "rasteiner\KEL\generated" -visitor -no-listener -Xexact-output-dir src/grammar/KEL.g4

Run Tests

./vendor/bin/phpunit tests