rishi/scryer-prolog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Implementation of the predicate char_type for a subset

Browse Source
This commit is contained in:
notoria
2020-04-22 20:44:10 +02:00
parent e3a7f9eb7a
commit 4b50608642
2 changed files with 98 additions and 47 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/prolog/lib/charsio.pl
View File

@@ -57,10 +57,36 @@ extend_var_list_([V|Vs], N, VarList, NewVarList, VarType) :-
).
char_type(C, T) :-
( var(C) -> throw(error(instantiation_error, char_type/2))
; atom_length(C, 1) -> '$char_type'(C, T)
; throw(error(type_error(in_character, C), char_type/2))
char_type(Char, Type) :-
( var(Char) -> throw(error(instantiation_error, char_type/2))
; atom_length(Char, 1) ->
( ground(Type) -> '$char_type'(Char, Type)
; Type = symbolic_control, '$char_type'(Char, Type)
; Type = layout, '$char_type'(Char, Type)
; Type = symbolic_hexadecimal, Char = x
; Type = octal_digit, '$char_type'(Char, Type)
; Type = binary_digit, '$char_type'(Char, Type)
; Type = hexadecimal_digit, '$char_type'(Char, Type)
; Type = exponent, '$char_type'(Char, Type)
; Type = sign, '$char_type'(Char, Type)
; Type = upper, '$char_type'(Char, Type)
; Type = lower, '$char_type'(Char, Type)
; Type = graphic, '$char_type'(Char, Type)
; Type = alpha, '$char_type'(Char, Type)
; Type = decimal_digit, '$char_type'(Char, Type)
; Type = alnum, '$char_type'(Char, Type)
; Type = meta, '$char_type'(Char, Type)
; Type = solo, '$char_type'(Char, Type)
; Type = prolog, '$char_type'(Char, Type)
; Type = alphabetic, '$char_type'(Char, Type)
; Type = whitespace, '$char_type'(Char, Type)
; Type = control, '$char_type'(Char, Type)
; Type = numeric, '$char_type'(Char, Type)
; Type = ascii, '$char_type'(Char, Type)
; Type = ascii_punctuation, '$char_type'(Char, Type)
; Type = ascii_graphic, '$char_type'(Char, Type)
)
; throw(error(type_error(in_character, Char), char_type/2))
).