A.20 Predefined type predicates


R5RS primary predicates

Type predicate

Description

boolean?

boolean

char?

character

number?

number

pair?

pair

port?

port

procedure?

procedure

string?

string

symbol?

symbol

vector?

vector


R5RS secondary predicates

Type predicate

Description

char-alphabetic?

alphabetic character

char-lower-case?

lower-case character

char-numeric?

numeric character

char-upper-case?

upper-case character

char-whitespace?

whitespace character

complex?

complex number

eof-object?

end-of-file object

even?

even number

exact?

exact number

inexact?

inexact number

input-port?

input port

integer?

integer

list?

list (use cheap-list? for faster processing)

negative?

negative number

null?

null

odd?

odd number

output-port?

output port

positive?

positive number

rational?

rational number

real?

real number

zero?

zero


Guile predicates

Type predicate

Description

hash-table?

hash table


LilyPond scheme predicates

Type predicate

Description

boolean-or-symbol?

boolean or symbol

cheap-list?

list (use this instead of list? for faster processing)

color?

color

fraction?

fraction, as pair

grob-list?

list of grobs

index?

non-negative integer

markup?

markup

markup-command-list?

markup command list

markup-list?

markup list

moment-pair?

pair of moment objects

number-list?

number list

number-or-grob?

number or grob

number-or-markup?

number or markup

number-or-pair?

number or pair

number-or-string?

number or string

number-pair?

pair of numbers

number-pair-list?

list of number pairs

rhythmic-location?

rhythmic location

scheme?

any type

string-or-music?

string or music

string-or-pair?

string or pair

string-or-symbol?

string or symbol

symbol-list?

symbol list

symbol-list-or-music?

symbol list or music

symbol-list-or-symbol?

symbol list or symbol

void?

void


LilyPond exported predicates

Type predicate

Description

ly:book?

book

ly:box?

box

ly:context?

context

ly:context-def?

context definition

ly:context-mod?

context modification

ly:dimension?

dimension, in staff space

ly:dir?

direction

ly:dispatcher?

dispatcher

ly:duration?

duration

ly:event?

post event

ly:font-metric?

font metric

ly:grob?

graphical (layout) object

ly:grob-array?

array of grobs

ly:input-location?

input location

ly:item?

item

ly:iterator?

iterator

ly:lily-lexer?

lily-lexer

ly:lily-parser?

lily-parser

ly:listener?

listener

ly:moment?

moment

ly:music?

music

ly:music-function?

music function

ly:music-list?

list of music objects

ly:music-output?

music output

ly:otf-font?

OpenType font

ly:output-def?

output definition

ly:page-marker?

page marker

ly:pango-font?

pango font

ly:paper-book?

paper book

ly:paper-system?

paper-system Prob

ly:pitch?

pitch

ly:prob?

property object

ly:score?

score

ly:simple-closure?

simple closure

ly:skyline?

skyline

ly:skyline-pair?

pair of skylines

ly:source-file?

source file

ly:spanner?

spanner

ly:spring?

spring

ly:stencil?

stencil

ly:stream-event?

stream event

ly:translator?

translator

ly:translator-group?

translator group

ly:unpure-pure-container?

unpure/pure container


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LilyPond — 記譜法リファレンス v2.18.2 (安定版).