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Scope (programming) - Wikipedia, the free encyclopedia
In computer programming, scope is an enclosing context where values and expressions are associated. Various programming languages have various types of scopes. The type of scope determines what kind...
en.wikipedia.org/wiki/Scope_(programming) |
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The rules that we have just been describing are the details of how Scheme implements “lexical scoping”. This subsection takes a brief diversion to explain ...
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(We can also say that Scheme is statically scoped, rather than dynamically scoped, like some old Lisps.) When you see a variable name in the code, you can tell what variable it refers just to by looking at ... Here references to the established entity can occur only within certain program portions that are lexically (that is,
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Statically scoped languages differ as to whether the scope is limited to the smallest block (including begin/end blocks) containing the identifier's declaration (e.g. C, Perl) or to whole function and procedure bodies (e.g. ECMAScript), or some larger unit of code (e.g. ?). The former is known as static nested scope.
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Aug 31, 2008 ... lexically scoped. (programming) Having the scope of an identifier limited to the block of source code text that declares it -- in the case ...
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Scheme is a lexically scoped language as opposed to using dynamic-scope. With this scope the identifier is fixed at interpretation and or compilation in some region in the source code containing the identifier's declaration.
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The obvious solution is to provide language support for lexically-scoped type variables, an area whose design space has not been systematically explored. Our contribution is to bring together the relevant folk lore, in coherent form, and make it accessible to a much larger community than hitherto.
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(Mnemonic: like \digits.) These variables are all read-only and dynamically scoped to the current BLOCK. ... This variable is read-only and dynamically scoped to the current BLOCK. ... (Mnemonic: be positive and forward looking.) This variable is read-only and dynamically scoped to the current BLOCK.
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Home | Example Publications ... Generated by D2R Server ... rdfs:label Lexically scoped distribution: what you see is what you get. (xsd:string)
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Lexically-scoped LISP dialects offer great flexibility and expressive power. Unfortunately, they tend to be inefficiently implemented, because many interpreter structures such as variable binding environments must be allocated in the heap rather than on the stack.
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