65 lines
2.6 KiB
HTML
65 lines
2.6 KiB
HTML
---
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layout: site
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title: Crystal and Ruby, Ruby and Crystal
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---
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<div class="content">
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<div class="container theme">
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<div class="row vspace30">
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<div class="span2 center">
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</div>
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<div class="span4 center">
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<h3><span>The three Rubies</span></h3>
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</div>
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<div class="span4 center">
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<h3><span>and Crystal</span></h3>
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</div>
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</div>
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<div class="row vspace10">
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<div class="span4">
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<h4>Syntax</h4>
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<h5>and meaning</h5>
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<blockquote><p> Pure OO, blocks, closures,clean syntax, simple but consistant, open classes<br/></p></blockquote>
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<p> Just to name a few of the great features of the ruby syntax and it's programming model. <br/>
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Syntax is an abstract thing, as far as i know there is no ebnf or similar definition of it.
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Also as far as i know there is only the mri which is considered the only source of how ruby works. <br/>
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With more vm's appearing this is changing and the mpsec is apparently catching up. <br/>
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As we are just starting we focus on oo consistency and implement only essential features.
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</p>
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</div>
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<div class="span4">
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<h4>Vm</h4>
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<h5>Crystal</h5>
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<blockquote><p> The heart of the crystal-vm project is crystal, the virtual machine <br /></p></blockquote>
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<p>Crystal is written in 100% ruby</p>
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<p>Crystal uses an existing ruby to bootstrap itself</p>
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<p>Crystal generates native code, and ( with 1+2) creates a native ruby virtual machine. </p>
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<p>Crystal does not interpret, it parses and compiles (just making sure that's clear)</p>
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<p>Crystal uses a statically typed value based core with rtti and oo syntax to achieve this
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(think c++ with ruby syntax)</p>
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</div>
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<div class="span4">
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<h4>Core Library </h4>
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<h5>Parfait</h5>
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<blockquote><p> Ruby has core and std lib, with a slightly unclear distinction.
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Parfait is a minimalistic core library on which this could be built.
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</p></blockquote>
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<p>
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Stdlib, as Libc , have grown over the decades to provide overlapping and sometimes inconsistant features, most
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of which can and should be outside such a standard component.
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</p>
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<p> Crystal considers only that core which can not be suplied though an external gem, this is called
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Parfait. It only provides Array and String and an ability to access
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the operating system, in 100% ruby.</p>
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<p>Full ruby stdlib compliance is not an initial project goal, but may be achieved through external libraries</p>
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</div>
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</div>
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</div>
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</div>
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