scheme

---

Classes

Scheme	Abjad model of Scheme code.
SchemeParser	SchemeParser mimics how LilyPond's embedded Scheme parser behaves.

class abjad.parsers.scheme.Scheme(value=None)

Abjad model of Scheme code.

---

Attributes Summary

__eq__	Return self==value.
__repr__	Return repr(self).

---

Special methods

overridden __eq__(other)

Return self==value.

overridden __repr__()

Return repr(self).

class abjad.parsers.scheme.SchemeParser(debug=False)

SchemeParser mimics how LilyPond’s embedded Scheme parser behaves.

It parses a single Scheme expression and then stops, by raising a SchemeParserFinishedError.

The parsed expression and its exact length in characters are cached on the SchemeParser instance.

It is intended to be used only in conjunction with LilyPondParser.

---

Attributes Summary

A
DIGIT
HEX
IDENTIFIER
INITIAL
INT
N
REAL
SUBSEQUENT
UNSIGNED
lexer_rules_object	Lexer rules object of Scheme parser.
p_boolean__BOOLEAN	boolean : BOOLEAN
p_constant__boolean	constant : boolean
p_constant__number	constant : number
p_constant__string	constant : string
p_data__EMPTY	data :
p_data__data__datum	data : data datum
p_datum__constant	datum : constant
p_datum__list	datum : list
p_datum__symbol	datum : symbol
p_datum__vector	datum : vector
p_error
p_expression__QUOTE__datum	expression : QUOTE datum
p_expression__constant	expression : constant
p_expression__variable	expression : variable
p_form__expression	form : expression
p_forms__EMPTY	forms :
p_forms__forms__form	forms : forms form
p_list__L_PAREN__data__R_PAREN	list : L_PAREN data R_PAREN
p_list__L_PAREN__data__datum__PERIOD__datum__R_PAREN	list : L_PAREN data datum PERIOD datum R_PAREN
p_number__DECIMAL	number : DECIMAL
p_number__HEXADECIMAL	number : HEXADECIMAL
p_number__INTEGER	number : INTEGER
p_program__forms	program : forms
p_string__STRING	string : STRING
p_symbol__IDENTIFIER	symbol : IDENTIFIER
p_variable__IDENTIFIER	variable : IDENTIFIER
p_vector__HASH__L_PAREN__data__R_PAREN	vector : HASH L_PAREN data R_PAREN
parser_rules_object	Parser rules object of Scheme parser.
start	<program> : <form>*
states
t_BOOLEAN	#(T|F|t|f)
t_DECIMAL
t_HASH	#
t_HEXADECIMAL
t_IDENTIFIER
t_INTEGER
t_L_PAREN	(
t_R_PAREN	)
t_anything	.
t_error
t_ignore
t_newline	n+
t_quote	"
t_quote_440	\[nt\'"]
t_quote_443	[^\""]+
t_quote_446	"
t_quote_456	.
t_quote_error
t_quote_ignore
t_whitespace	[ tr]+
tokens

---

Special methods

(Parser).__call__(string)

Parse string and return result.

---

Methods

p_boolean__BOOLEAN(p)

boolean : BOOLEAN

p_constant__boolean(p)

constant : boolean

p_constant__number(p)

constant : number

p_constant__string(p)

constant : string

p_data__EMPTY(p)

data :

p_data__data__datum(p)

data : data datum

p_datum__constant(p)

datum : constant

p_datum__list(p)

datum : list

p_datum__symbol(p)

datum : symbol

p_datum__vector(p)

datum : vector

p_error(p)

p_expression__QUOTE__datum(p)

expression : QUOTE datum

p_expression__constant(p)

expression : constant

p_expression__variable(p)

expression : variable

p_form__expression(p)

form : expression

p_forms__EMPTY(p)

forms :

p_forms__forms__form(p)

forms : forms form

p_list__L_PAREN__data__R_PAREN(p)

list : L_PAREN data R_PAREN

p_list__L_PAREN__data__datum__PERIOD__datum__R_PAREN(p)

list : L_PAREN data datum PERIOD datum R_PAREN

p_number__DECIMAL(p)

number : DECIMAL

p_number__HEXADECIMAL(p)

number : HEXADECIMAL

p_number__INTEGER(p)

number : INTEGER

p_program__forms(p)

program : forms

p_string__STRING(p)

string : STRING

p_symbol__IDENTIFIER(p)

symbol : IDENTIFIER

p_variable__IDENTIFIER(p)

variable : IDENTIFIER

p_vector__HASH__L_PAREN__data__R_PAREN(p)

vector : HASH L_PAREN data R_PAREN

t_BOOLEAN(t)

#(T|F|t|f)

t_DECIMAL(t)

t_HASH(t)

#

t_HEXADECIMAL(t)

t_IDENTIFIER(t)

t_INTEGER(t)

t_L_PAREN(t)

(

t_R_PAREN(t)

)

t_anything(t)

.

t_error(t)

t_newline(t)

n+

t_quote(t)

"

t_quote_440(t)

\[nt\’”]

t_quote_443(t)

[^\””]+

t_quote_446(t)

"

t_quote_456(t)

.

t_quote_error(t)

t_whitespace(t)

[ tr]+

(Parser).tokenize(string)

Tokenize string and print results.

---

Read-only properties

(Parser).debug

Is true when parser runs in debugging mode.

(Parser).lexer

Gets parser’s PLY Lexer instance.

lexer_rules_object

Lexer rules object of Scheme parser.

(Parser).logger

Gets parser’s logger.

(Parser).logger_path

Gets parser’s logfile output path.

(Parser).output_path

Gets output path for files associated with the parser.

(Parser).parser

Gets parser’s PLY LRParser instance.

parser_rules_object

Parser rules object of Scheme parser.

(Parser).pickle_path

Gets output path for the parser’s pickled parsing tables.