lambda fiddle

Table of Contents

About Lambda-Fiddle

Lambda-fiddle is a collection of utilities to process lambda-lists. Mostly useful in contexts where you want a macro that uses lambda-lists in some fashion but need more precise processing.

How To

Included are --for each standard lambda-list part-- a remove-*-part and *-lambda-var/s function that remove the specified part or extract the associated variable/s, respectively. These are all based on the more generale collect-for-keyword and exclude-for-keyword functions that will scan the given lambda-list for the keyword and collect accordingly. The generalised functions may also be useful if you plan to include your own non-standard keywords.

(lambda-fiddle:remove-aux-part '(foo bar &key baz &aux (something else) altogether))
(lambda-fiddle:aux-lambda-vars '(foo bar &key baz &aux (something else) altogether))

Additionally, there is split-lambda-list and its macro partner with-destructured-lambda-list that split the lambda-list into all its parts and return/bind them accordingly, allowing for easy access.

(lambda-fiddle:split-lambda-list '(&whole wide world &key roles))
(lambda-fiddle:with-destructured-lambda-list (:required req) '(foo bar &optional baz)
  req)

System Information

Definition Index

• LAMBDA-FIDDLE

  • ORG.SHIRAKUMO.LAMBDA-FIDDLE

  No documentation provided.

  • EXTERNAL SPECIAL-VARIABLE

    *LAMBDA-KEYWORDS*

    Source

    List of all standard lambda-keywords.

  • EXTERNAL SPECIAL-VARIABLE

    *SINGLE-ARGUMENT-KEYWORDS*

    Source

    List of all standard lambda-keywords that only allow one argument.

  • EXTERNAL FUNCTION

    AUX-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Returns all auxiliary variables of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    BODY-LAMBDA-VAR

    • LAMBDA-LIST
    • &REST

    Source

    Returns the body variable of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    COLLECT-FOR-KEYWORD

    • KEYWORD
    • LAMBDA-LIST
    • &KEY
    • SPANNING
    • &REST

    Source

    Returns a fresh list of elements listed after the KEYWORD in the lambda-list.
    If SPANNING is T, it includes everything up until the next keyword, otherwise only one token each.

  • EXTERNAL FUNCTION

    CONSTRUCT-LAMBDA-LIST

    • &KEY
    • WHOLE
    • ENVIRONMENT
    • REQUIRED
    • OPTIONAL
    • REST
    • BODY
    • KEY
    • ALLOW-OTHER-KEYS
    • AUX
    • &REST

    Source

    Construct a lambda-list out of the given parts.

  • EXTERNAL FUNCTION

    ENVIRONMENT-LAMBDA-VAR

    • LAMBDA-LIST
    • &REST

    Source

    Returns the environment variable of the lambda-list

  • EXTERNAL FUNCTION

    EXCLUDE-FOR-KEYWORD

    • KEYWORD
    • LAMBDA-LIST
    • &KEY
    • SPANNING
    • &REST

    Source

    Returns a fresh lambda-list but without the parts identified by KEYWORD.
    If SPANNING is T, it excludes everything up until the next keyword, otherwise only one token each.

  • EXTERNAL FUNCTION

    EXTRACT-ALL-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Extracts all variable bindings from the lambda-list, including the present-p ones.

  • EXTERNAL FUNCTION

    EXTRACT-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Extracts the symbols that name the variables in the lambda-list.

  • EXTERNAL FUNCTION

    FLATTEN-LAMBDA-LIST

    • LAMBDA-LIST
    • &REST

    Source

    Flattens the lambda-list by replacing all lists within it with their respective first symbol.
    This also properly flattens inner lambda-lists of macro-lambda-lists.

  • EXTERNAL FUNCTION

    FLATTEN-METHOD-LAMBDA-LIST

    • LAMBDA-LIST
    • &REST

    Source

    Flattens the lambda-list by replacing all lists within it with their respective first symbol.
    Unlike FLATTEN-LAMBDA-LIST, this works for method lambda lists.

  • EXTERNAL FUNCTION

    KEY-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Returns all keyword variables of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    LAMBDA-KEYWORD-P

    • SYMBOL
    • &REST

    Source

    Returns the symbol if it is a lambda-keyword symbol (the &-options).

  • EXTERNAL FUNCTION

    OPTIONAL-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Returns all optional variables of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    REMOVE-AUX-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &aux part.

  • EXTERNAL FUNCTION

    REMOVE-BODY-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &body part.

  • EXTERNAL FUNCTION

    REMOVE-ENVIRONMENT-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &environment part.

  • EXTERNAL FUNCTION

    REMOVE-KEY-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &key part (also removing &allow-other-keys if present).

  • EXTERNAL FUNCTION

    REMOVE-OPTIONAL-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &optional part.

  • EXTERNAL FUNCTION

    REMOVE-REQUIRED-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the required variables part.

  • EXTERNAL FUNCTION

    REMOVE-REST-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &rest part.

  • EXTERNAL FUNCTION

    REMOVE-WHOLE-PART

    • LAMBDA-LIST
    • &REST

    Source

    Returns a fresh lambda-list without the &whole part.

  • EXTERNAL FUNCTION

    REQUIRED-LAMBDA-VARS

    • LAMBDA-LIST
    • &REST

    Source

    Returns all required variables of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    REST-LAMBDA-VAR

    • LAMBDA-LIST
    • &REST

    Source

    Returns the rest variable of the ordinary-lambda-list.

  • EXTERNAL FUNCTION

    SINGLE-ARGUMENT-KEYWORD-P

    • SYMBOL
    • &REST

    Source

    Returns the symbol if it is a single-argument-keyword symbol.

  • EXTERNAL FUNCTION

    SPLIT-LAMBDA-LIST

    • LAMBDA-LIST
    • &REST

    Source

    Splits the lambda-list into its individual definition parts. Returns a list of values as follows:
     ((REQUIRED*) WHOLE ENVIRONMENT (OPTIONAL*) REST BODY (KEY*) (AUX*))

  • EXTERNAL FUNCTION

    WHOLE-LAMBDA-VAR

    • LAMBDA-LIST
    • &REST

    Source

    Returns the &whole variable of the lambda-list.

  • EXTERNAL MACRO

    WITH-DESTRUCTURED-LAMBDA-LIST

    • &REST
    • PARTS
    • &KEY
    • WHOLE
    • ENVIRONMENT
    • REQUIRED
    • OPTIONAL
    • REST
    • BODY
    • KEY
    • AUX
    • &ALLOW-OTHER-KEYS
    • &REST
    • EXPRESSION
    • &BODY
    • FORMS
    • &REST

    Source

    Destructures the given EXPRESSION into its lambda-list parts.