coops-utils | chickadee

Returns a copy of the object INSTANCE, except where an INITFORM overrides an existing SLOT value of the INSTANCE. The copy is a shallow copy that shares values with INSTANCE.

make-copy is a generic-procedure specializing the first argument.

Describe

coops object internals.

Usage

(import coops-describe)

describe-object

describe-object INSTANCE #!optional OUT current-output-portprocedure

Prints information about the INSTANCE to the output-port OUT.

describe-object is a generic-procedure specializing the first argument.

A more detailed print-object for use in a REPL.

describe-object-slot

(describe-object-slot INSTANCE SLOT [NAME-MAXLEN 32 [OUT (current-output-port)]])procedure

Prints information about the INSTANCE's SLOT to the output-port OUT. Does not append a (newline).

NAME-MAXLEN is the maximum number of single-width characters in a slotname.

Introspection

coops predicates and read accessors.

Some TinyCLOS inspired property readers.

Usage

(import coops-introspection)

instance-of?

instance-of? OBJECT CLASSprocedure: Is OBJECT an instance of the CLASS?

class?

class? OBJECTprocedure: Is OBJECT an instance of the <standard-class>?

check-class LOC OBJ #!optional ARGNAMprocedure
error-class LOC OBJ #!optional ARGNAMprocedure

instance?

instance? OBJECTprocedure: Is OBJECT an instance of a basic class. Neither an instance of the <standard-class> or a primitive such as boolean or vector?

check-instance LOC OBJ #!optional ARGNAMprocedure
error-instance LOC OBJ #!optional ARGNAMprocedure

primitive-instance?

primitive-instance? OBJECTprocedure

Is OBJECT an instance of the <primitive-object> class or #t?

Note #t is the default class, without the coops-primitive-objects module.

generic?

generic? OBJECTprocedure: Synonym for generic-procedure?.

check-generic LOC OBJ #!optional ARGNAMprocedure
error-generic LOC OBJ #!optional ARGNAMprocedure

method?

method? OBJECTprocedure

Is OBJECT a method of a generic-procedure?

Only useful in the context of a generic-*-methods procedure result.

check-method LOC OBJ #!optional ARGNAMprocedure
error-method LOC OBJ #!optional ARGNAMprocedure

class-precedence-list

class-precedence-list CLASSprocedure: Returns the superclasses of CLASS.

class-slots

class-slots CLASSprocedure: Returns the slot names of CLASS.

class-direct-supers

class-direct-supers CLASSprocedure: Returns the uninherited superclasses of CLASS.

class-direct-slots

class-direct-slots CLASSprocedure: Returns the uninherited slot names of CLASS.

generic-anonymous?

generic-anonymous? GENERICprocedure: Is GENERIC an unnamed generic-procedure.

generic-name

generic-name GENERICprocedure: Returns the name of GENERIC. The name is #f for an anonymous generic procedure.

generic-specialized-arguments

generic-specialized-arguments GENERICprocedure: The arguments that GENERIC is specialized upon.

generic-primary-methods

generic-primary-methods GENERICprocedure: Returns the list of #:primary methods for GENERIC.

generic-before-methods

generic-before-methods GENERICprocedure: Returns the list of #:before methods for GENERIC.

generic-after-methods

generic-after-methods GENERICprocedure: Returns the list of #:after methods for GENERIC.

generic-around-methods

generic-around-methods GENERICprocedure: Returns the list of #:around methods for GENERIC.

method-specializers

method-specializers METHODprocedure

Returns the classes that specialize METHOD.

Throws an assertion error when slot not actually list.

method-procedure

method-procedure METHODprocedure

Returns the procedure for METHOD.

Throws an assertion error when slot not actually procedure.

Examples

(import coops coops-introspection)

(define (print-methods generic)
  (for-each
    (lambda (m)
      (print
        (generic-name generic)
        " specialized by " (method-specializers m)
        " as " (method-procedure m)))
    (generic-primary-methods generic)) )

Requirements

srfi 1 srfi 13 type-checks coops

test test-utils

Bugs and Limitations

The introspection API is brittle, especially the generics portion.

Suggested only for use during REPL development with coops.

Repository

This egg is hosted on the CHICKEN Subversion repository:

https://anonymous@code.call-cc.org/svn/chicken-eggs/release/5/coops-utils

If you want to check out the source code repository of this egg and you are not familiar with Subversion, see this page.

Version history

2.3.0: Depends on coops:1.4. Fix signatures.
2.2.4: Stronger signatures. Fix closure access.
2.2.3: Use format.
2.2.2: Fix signatures, new test-runner.
2.2.1: Use check-errors basic.
2.2.0: make-copy is generic.
2.1.5: Fix method?, instance? & primitive-instance?.
2.1.4: make-copy uses fresh slots.
2.1.3: Bug #1700.
2.1.2: method-specializers & method-procedure type matches documentation.
2.1.1: Fix signatures.
2.1.0: describe in own module.
2.0.0: CHICKEN 5 release.

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