h3 id="sec:summary-lib-dcgbasics">F.2.12 library(dcgbasics)

alpha_to_lower//1	Read a letter (class =alpha=) and return it as a lowercase letter.
atom//1	Generate codes of Atom.
blank//0	Take next =space= character from input.
blanks//0	Skip zero or more white-space characters.
blanks_to_nl//0	Take a sequence of blank//0 codes if blanks are followed by a newline or end of the input.
csym//1	Recognise a C symbol according to the‘csymf` and‘csym` code type classification provided by the C library.
digit//1	Number processing.
digits//1	Number processing.
eol//0	Matches end-of-line.
eos//0	Matches end-of-input.
float//1	Process a floating point number.
integer//1	Number processing.
nonblank//1	Code is the next non-blank (=graph=) character.
nonblanks//1	Take all =graph= characters.
number//1	Generate extract a number.
prolog_var_name//1	Matches a Prolog variable name.
remainder//1	Unify List with the remainder of the input.
string//1	Take as few as possible tokens from the input, taking one more each time on backtracking.
string_without//2	Take as many codes from the input until the next character code appears in the list EndCodes.
white//0	Take next =white= character from input.
whites//0	Skip white space _inside_ a line.
xdigit//1	True if the next code is a hexdecimal digit with Weight.
xdigits//1	List of weights of a sequence of h