Initial commit

.gitignore

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+vendor
+composer.lock

composer.json

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+{
+    "name": "pre/short-closures",
+    "require": {
+        "php": "^7.0",
+        "pre/plugin": "dev-master"
+    },
+    "autoload": {
+        "files": [
+            "functions.php"
+        ]
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
+}

functions.php

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+<?php
+
+namespace Pre;
+
+addMacroPath(__DIR__ . "/macros.pre");

macros.pre

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+<?php
+
+macro {
+    →(···expression)
+} >> {
+    ··stringify(···expression)
+}
+
+macro {
+    (···parameters) => { ···body }
+} >> {
+    eval('
+        $context = get_defined_vars();
+
+        return function('.→(···parameters).') use ($context) {
+            extract($context);
+
+            '.→(···body).'
+        };
+    ')
+}