Enforced immutability: Difference between revisions
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Note that the <code>CONSTANT:</code> word does nothing to enforce immutability on the object it places on the stack, as it is functionally equivalent to a standard word definition with stack effect <code>( -- obj )</code>. |
Note that the <code>CONSTANT:</code> word does nothing to enforce immutability on the object it places on the stack, as it is functionally equivalent to a standard word definition with stack effect <code>( -- obj )</code>. |
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=={{header|Forth}}== |
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Forth has constant, 2constant and fconstant for creating named constants. This can only be done for global scoped objects, not for function parameters. |
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<lang Forth> |
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256 constant one-hex-dollar |
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s" Hello world" 2constant hello \ "hello" holds the address and length of an anonymous string. |
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3.14159265 fconstant pi |
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</lang> |
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=={{header|Fortran}}== |
=={{header|Fortran}}== |
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