Analyze R7RS library definitions.

A qualified identifier is a triple consisting of a library name, an identifier naming a top-level binding of that library (before renaming), and a syntax object to locate syntax error messages. Returns the Scheme datum representing the R7RS library name wrapped in the syntax object library-name-syntax. If library-name-syntax does not wrap a proper R7RS library name as a Scheme datum, a syntax error object is signaled. If the exception is continued, unwrap-library-name returns #f. Returns a qualified identifier in the library library-name with name symbol and syntax object context. Returns #t if object is a qualified identifier, and #f otherwise. Returns the library name of the qualified-identifier. Returns the name of the qualified-identifier. Returns the syntax object of the qualified-identifier. Analyzes the library with name library-name and declarations declarations. The library-name is a Scheme datum representing an R7RS library name, and the declarations are a list of syntax objects each wrapping a Scheme datum representing an R7RS library declaration. Returns four values: The first value is a mapping that maps all the identifiers exported by the library to their original bindings, which are identified by qualified identifiers. The second value is a mapping that maps all the identifiers imported into the library to their original bindings, which are likewise identified by qualified identifiers. The third value is a set containing the library names of those libraries upon which this library is dependent, directly or indirectly. The fourth value is the library's body, a sequence of syntax objects each wrapping a top-level command or definition. Returns #t if symbol is a feature identifier in the current dynamic environment, and #f otherwise. Returns #t if, in the current dynamic environment, the library with name library-name can be imported, and #f otherwise. Context is either #f or a syntax object that can be referred to if library-exports raises a syntax error object. Returns a mapping that maps all the identifiers exported by the library with name library-name to their original bindings, which are identified by qualified identifiers, or #f if there is no such library known. Context is either #f or a syntax object that can be referred to if library-exports raises a syntax error object. Returns a set containing the library names of those libraries upon which, directly or indirectly the library with name library-name depends. It is an error to invoke library-dependencies on a library name before invoking library-exports upon that name. Returns the current predicate queried when invoking feature-identifier?. This procedure is a parameter object. The initial binding is not specified. Returns the current predicate queried when invoking library-importable?. This procedure is a parameter object. The initial binding is not specified. Returns the current accessor queried when invoking library-exports. This procedure is a parameter object. The initial binding is not specified. Returns the current accessor queried when invoking library-dependencies. This procedure is a parameter object. The initial binding is not specified. Comparator for symbols. Has an ordering predicate and a hash function. Comparator for R7RS library names as Scheme datums. Has an ordering predicate and a hash function. Type-test predicate for library names. Returns #t if object is a Scheme datum representing a library name, and #f otherwise.