Scope modifiers: Difference between revisions
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SqrtNegInf (talk | contribs) m →{{header|Raku}}: Fix comments: Perl 6 --> Raku |
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Here, <code>std-cat</code> refers to the concatenation function from the standard |
Here, <code>std-cat</code> refers to the concatenation function from the standard |
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library, not the locally declared constant by that name. |
library, not the locally declared constant by that name. |
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=={{header|Wren}}== |
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Wren uses lexical scoping and has no scope modifiers as such. |
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However, instance and static fields of a class always begin respectively with one underscore or two underscores (nothing else can) and are always private to the class. |
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In the following example, the attempt to access the private field is picked up at compile time (Wren has a single-pass 'bytecode' compiler) and so the penultimate line, although OK, doesn't print. |
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<lang ecmascript>class MyClass { |
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construct new(a) { |
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_a = a // creates an instance field _a automatically |
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} |
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a { _a } // allow public access to the field |
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} |
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var mc = MyClass.new(3) |
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System.print(mc.a) // fine |
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System.print(mc._a) // can't access _a directly as its private to the class</lang> |
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{{out}} |
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<pre> |
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$ wren scope_modifiers.wren |
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[./scope_modifiers line 10] Error at '_a': Expect method name after '.'. |
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</pre> |
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=={{header|zkl}}== |
=={{header|zkl}}== |