Welcome to the interactive Praspel shell \o/.

1 files changed, 254 insertions, 0 deletions

diff --git a/Bin/Shell.php b/Bin/Shell.php
new file mode 100644
index 0000000..9de73b2
--- /dev/null
+++ b/Bin/Shell.php
@@ -0,0 +1,254 @@
+<?php
+
+/**
+ * Hoa
+ *
+ *
+ * @license
+ *
+ * New BSD License
+ *
+ * Copyright © 2007-2012, Ivan Enderlin. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the Hoa nor the names of its contributors may be
+ *       used to endorse or promote products derived from this software without
+ *       specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+namespace {
+
+from('Hoa')
+
+/**
+ * \Hoa\File\Read
+ */
+-> import('File.Read')
+
+/**
+ * \Hoa\Compiler\Llk
+ */
+-> import('Compiler.Llk.~')
+
+/**
+ * \Hoa\Praspel\Visitor\Interpreter
+ */
+-> import('Praspel.Visitor.Interpreter')
+
+/**
+ * \Hoa\Praspel\Visitor\Compiler
+ */
+-> import('Praspel.Visitor.Compiler')
+
+/**
+ * \Hoa\Realdom
+ */
+-> import('Realdom.~')
+
+/**
+ * \Hoa\Math\Sampler\Random
+ */
+-> import('Math.Sampler.Random')
+
+/**
+ * \Hoa\Console\Cursor
+ */
+-> import('Console.Cursor');
+
+}
+
+namespace Hoa\Praspel\Bin {
+
+/**
+ * Class \Hoa\Praspel\Bin\Shell.
+ *
+ * Interactive Praspel shell.
+ *
+ * @author     Ivan Enderlin <ivan.enderlin@hoa-project.net>
+ * @copyright  Copyright © 2007-2012 Ivan Enderlin.
+ * @license    New BSD License
+ */
+
+class Shell extends \Hoa\Console\Dispatcher\Kit {
+
+    /**
+     * Options description.
+     *
+     * @var \Hoa\Praspel\Bin\Shell array
+     */
+    protected $options = array(
+        array('help', \Hoa\Console\GetOption::NO_ARGUMENT, 'h'),
+        array('help', \Hoa\Console\GetOption::NO_ARGUMENT, '?')
+    );
+
+
+
+    /**
+     * The entry method.
+     *
+     * @access  public
+     * @return  int
+     */
+    public function main ( ) {
+
+        while(false !== $c = $this->getOption($v)) switch($c) {
+
+            case 'h':
+            case '?':
+                return $this->usage();
+              break;
+
+            case '__ambiguous':
+                $this->resolveOptionAmbiguity($v);
+              break;
+        }
+
+        \Hoa\Realdom::setDefaultSampler(new \Hoa\Math\Sampler\Random());
+
+        $compiler = \Hoa\Compiler\Llk::load(
+            new \Hoa\File\Read('hoa://Library/Praspel/Grammar.pp')
+        );
+        $interpreter = new \Hoa\Praspel\Visitor\Interpreter();
+        $dump        = new \Hoa\Praspel\Visitor\Compiler();
+        $interpreter->visit($compiler->parse('@requires;'));
+
+        $handle     = null;
+        $expression = '.h';
+
+        do { try {
+
+        if('.' === $expression[0]) {
+
+            @list($expression, $tail) = explode(' ', $expression);
+        }
+
+        switch($expression) {
+
+            case '.h':
+            case '.help':
+                echo 'Usage:', "\n",
+                     '    .h[elp]      to print this help;', "\n",
+                     '    .c[lear]     to clear the screen;', "\n",
+                     '    .v[ariables] to print all variables;', "\n",
+                     '    .s[ample]    to sample a value of a variable;', "\n",
+                     '    .u[nset]     to unset a variable;', "\n",
+                     '    .d[ump]      to dump the tree of the expression;', "\n",
+                     '    .quit        to quit.', "\n";
+              break;
+
+            case '.c':
+            case '.clear':
+                \Hoa\Console\Cursor::clear('↕');
+              break;
+
+            case '.v':
+            case '.variables':
+                foreach($interpreter->getClause() as $variable)
+                    echo $variable->getName(), "\n";
+              break;
+
+            case '.s':
+            case '.sample':
+                if(null === $tail) {
+
+                    echo 'You must precise a variable name.', "\n";
+                    break;
+                }
+
+                $_clause   = $interpreter->getClause();
+
+                if(!isset($_clause[$tail])) {
+
+                    echo 'Variable ', $tail, ' does not exist.', "\n";
+                    break;
+                }
+
+                $_variable = $_clause[$tail];
+                var_export($_variable->sample());
+                echo "\n";
+                $_variable->reset();
+              break;
+
+            case '.u':
+            case '.unset':
+                if(null === $tail) {
+
+                    echo 'You must precise a variable name.', "\n";
+                    break;
+                }
+
+                $_clause = $interpreter->getClause();
+                unset($_clause[$tail]);
+              break;
+
+            case '.d':
+            case '.dump':
+                echo $dump->visit($interpreter->getRoot());
+              break;
+
+            default:
+                if(null === $expression)
+                    break;
+
+                echo $interpreter->visit(
+                    $compiler->parse($expression, 'expression')
+                );
+
+                $handle = $expression;
+              break;
+
+        } }
+
+        catch ( \Hoa\Core\Exception $e ) {
+
+            echo $e->getFormattedMessage(), "\n";
+
+        }
+
+        echo "\n";
+
+        } while('.quit' !== $expression = $this->readLine('> '));
+
+        return;
+    }
+
+    /**
+     * The command usage.
+     *
+     * @access  public
+     * @return  int
+     */
+    public function usage ( ) {
+
+        echo 'Usage   : math:calc <options> [expression]', "\n",
+             'Options :', "\n",
+             $this->makeUsageOptionsList(array(
+                 'help' => 'This help.'
+             )), "\n";
+
+        return;
+    }
+}
+
+}
+
+__halt_compiler();
+Interactive Praspel shell.