資料來源 : Free On-Line Dictionary of Computing
lexical scope
(Or "static scope") In a lexically scoped
language, the {scope} of an {identifier} is fixed at {compile
time} to some region in the {source code} containing the
identifier's declaration. This means that an identifier is
only accessible within that region (including procedures
declared within it).
This contrasts with {dynamic scope} where the scope depends on
the nesting of {procedure} and {function} calls at {run time}.
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. ?), or some
larger unit of code (e.g. ?). The former is known as {static
nested scope}.
(2001-09-07)