1 Old Syntactic Forms
(#%module-begin form ...)
Like #%plain-module-begin from scheme/base, but (require-for-syntax mzscheme) is added to the beginning of the form sequence, thus importing mzscheme into the transformer environment for the module body. (In contrast, scheme/base exports for-syntax minimal transformer support, while scheme exports all of scheme/base for-syntax.)
(#%plain-module-begin form ...)
The same binding as #%plain-module-begin from scheme/base.
(#%plain-lambda formals body ...+)
The same binding as #%plain-lambda in scheme/base. (This binding was not present in version 372 and earlier.)
The same bindings as #%plain-lambda.
The same binding as #%plain-app from scheme/base.
(#%plain-app proc-expr arg-expr ...) (#%plain-app)
The same binding as #%app. (This binding was not present in version 372 and earlier.)
(define id expr) (define (head args) body ...+)
head = id | (head args) args = arg-id ... | arg-id ... . rest-id
Like define in scheme/base, but without support for keyword arguments or optional arguments.
(define-syntax id expr) (define-syntax (head args) body ...+)
(define-for-syntax id expr) (define-for-syntax (head args) body ...+)
Like define-syntax and define-for-syntax in scheme/base, but without support for keyword arguments or optional arguments (i.e., head is as for define).
Like if in scheme/base, but else-expr defaults to (void).
Like cond and case in scheme/base, but else and => are recognized as unbound identifiers, instead of as the scheme/base bindings.
(fluid-let ([id expr] ...) body ...+)
Provides a kind of dynamic binding via mutation of the ids.
The fluid-let form first evaluates each expr to obtain an entry value for each id. As evaluation moves into body, either though normal evaluation or a continuation jump, the current value of each id is swapped with the entry value. On exit from body, then the current value and entry value are swapped again.
(define-struct id-maybe-super (field-id ...) maybe-inspector-expr)
Like define-struct from scheme/base, but with fewer options. Each field is implicitly mutable, and the optional expr is analogous to supplying an #:inspector expression.
(let-struct id-maybe-super (field-id ...) body ...+)
(let () (define-struct id-maybe-super (field-id ...)) body ...+)
Like #%require and #%provide. The -for-syntax, -for-template, and -for-label forms are translated to #%require and #%provide using for-syntax, for-template, and for-label sub-forms, respectively.
(#%datum . datum)
Expands to 'datum, even if datum is a keyword.
(#%top-interaction . form)
The same as #%top-interaction in scheme/base.