PHP code example of exprml / exprml-php

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

exprml / exprml-php example snippets

use Exprml\Decoder;
use Exprml\Encoder;
use Exprml\Evaluator;
use Exprml\Evaluator\Config;
use Exprml\Parser;
use Exprml\PB\Exprml\V1\DecodeInput;
use Exprml\PB\Exprml\V1\EncodeInput;
use Exprml\PB\Exprml\V1\EvaluateInput;
use Exprml\PB\Exprml\V1\ParseInput;

$decodeResult->getValue()));

// Evaluate the parsed AST to get the result value.
$evaluator = new Evaluator(new Config());
$evaluateResult = $evaluator
    ->evaluate((new EvaluateInput())->setExpr($parseResult->getExpr()));

// Encode the evaluated result to get the final output.
$encodeResult = (new Encoder())
    ->encode((new EncodeInput())->setValue($evaluateResult->getValue()));

printf($encodeResult->getText() . "\n");
// => Hello, ExprML!

use Exprml\Decoder;
use Exprml\Encoder;
use Exprml\Evaluator;
use Exprml\Evaluator\Config;
use Exprml\Parser;
use Exprml\PB\Exprml\V1\DecodeInput;
use Exprml\PB\Exprml\V1\EncodeInput;
use Exprml\PB\Exprml\V1\EvaluateInput;
use Exprml\PB\Exprml\V1\EvaluateOutput;
use Exprml\PB\Exprml\V1\Expr\Path;
use Exprml\PB\Exprml\V1\ParseInput;
use Exprml\PB\Exprml\V1\Value;


    '$hello' => function (Path $path, array $args) {
        /** @var Value $name */
        $name = $args['$name'];
        $ret = (new Value())
            ->setType(Value\Type::STR)
            ->setStr('Hello, ' . $name->getStr() . '!');
        return (new EvaluateOutput())->setValue($name);
    },
]);

$evaluateResult = (new Evaluator($config))
    ->evaluate((new EvaluateInput())->setExpr($parseResult->getExpr()));
$encodeResult = (new Encoder())
    ->encode((new EncodeInput())->setValue($evaluateResult->getValue()));
printf($encodeResult->getText() . "\n");
// => 'Hello, ExprML Extension!'

use Exprml\Decoder;
use Exprml\Evaluator;
use Exprml\Evaluator\Config;
use Exprml\Parser;
use Exprml\Path;
use Exprml\PB\Exprml\V1\DecodeInput;
use Exprml\PB\Exprml\V1\EvaluateInput;
use Exprml\PB\Exprml\V1\EvaluateOutput;
use Exprml\PB\Exprml\V1\ParseInput;
use Exprml\PB\Exprml\V1\Value;

tion before the evaluation of each expression. */
        function (EvaluateInput $input) {
            printf("before:\t%s\n", Path::format($input->getExpr()->getPath()));
        })
    ->setAfterEvaluate(
        /* Hook a function after the evaluation of each expression. */
        function (EvaluateInput $input, EvaluateOutput $output) {
            printf("after:\t%s --> %s\n",
                Path::format($input->getExpr()->getPath()),
                Value\Type::name($output->getValue()->getType()));
        });

(new Evaluator($config))
    ->evaluate((new EvaluateInput())->setExpr($parseResult->getExpr()));
# =>
# before: /
# before: /cat/0
# after:  /cat/0 --> STR
# before: /cat/1
# after:  /cat/1 --> STR
# before: /cat/2
# after:  /cat/2 --> STR
# before: /cat/3
# after:  /cat/3 --> STR
# after:  / --> STR

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