tacoberu/hayo-ast

Abstract Syntax Tree (AST) implementation for the Hayo scripting language.

v0.1.5 2026-06-02 02:58 UTC

Requires

• php: >=7.4

Requires (Dev)

• phpstan/phpstan: ^2.1
• phpunit/phpunit: ^11.5
• slevomat/coding-standard: ^8.24
• spaze/phpstan-disallowed-calls: ^4.6
• tracy/tracy: ^2.4

MIT

• Martin Takáč

README

Abstract Syntax Tree (AST) implementation for the Hayo scripting language in PHP.

Note: This project is not useful on its own as it is a component of the php-hayo project.

Installation

Install via Composer:

composer require tacoberu/hayo-ast

Basic Usage

The library provides classes for representing various language constructs like expressions, scalars, lambdas, and scopes.

Scalars

Represent basic values:

use Taco\Hayo\Scalar;

$int = Scalar::Int_(42);
$str = Scalar::Str_("Hello World");
$bool = Scalar::Bool_(true);

echo (string) $int; // 42 : Int

Expressions

Expressions can be functional calls or binary operations:

use Taco\Hayo\Expr;
use Taco\Hayo\Scalar;

// Function call: str.len "Lorem"
$expr = Expr::Func_("str.len", [Scalar::Str_("Lorem")]);

// Binary operation: 1 + 2
$binExpr = Expr::Bin_(Scalar::Int_(1), "+", Scalar::Int_(2));

References

You can track required symbols (references) in an expression:

$expr = Expr::Bin_('a', "+", Scalar::Int_(1));
print_r($expr->refs()); // ['a', '+']

License

This project is licensed under the MIT License.