Metaprogramming: Difference between revisions
Added Arturo implementation
Drkameleon (talk | contribs) (Added Arturo implementation) |
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=={{header|Arturo}}==
Arturo has been designed with flexibility in mind (see: DSL creation) and as different languages of the same heritage (e.g. REBOL, Red, etc) has meta-programming capabilities as part of the language itself.
Let's see some examples:
===Infix Operators===
<lang rebol>sumThemUp: function [x,y][
x+y
]
alias.infix '--> 'sumThemUp
do [
print 3 --> 4
]</lang>
{{out}}
<pre>7</pre>
===Runtime Code Evaluation===
<lang rebol>code: "print 123"
do code</lang>
{{out}}
<pre>123</pre>
===Symbol Creation & Access at Runtime===
<lang rebol>myvar: "iAmAVariable"
let myvar 2
print myvar ; print the name of the variable
print var myvar ; print the value of the variable
print iAmAVariable ; the same</lang>
{{out}}
<pre>iAmAVariable
2
2</pre>
===Data as Code & Code as Data===
<lang rebol>block: [print]
block: block ++ to :integer "34"
print "Here is our code:"
print as.code block
print ""
print "And here's its result:"
do block</lang>
{{out}}
<pre>Here is our code:
[print 34]
And here's its result:
34</pre>
=={{header|C}}==
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