Works for ISO/IEC JTC1 SC22 WG17
Conformity Testing I: Syntax

(see also all documents, number_chars/2, variable_names/1)

The Query entry below including a newline character at the end is sent as input to read(G_0),G_0. or read(G_0),G_0, read(H_0),H_0. The comment /**/ is replaced by the last preceding entry not containing /**/ .

In all cases where a syntax error is required, an implementation may provide some value as an implementation specific extension due to 5.5.1. However, it turns out that those extensions are frequently incompatible between systems.

Full compliance as well as minor deviations or various valid interpretations of the standard are green.

read/1 is used to read the entire given text. Sometimes, read/1 needs further input or EOF to finish. Such differences are labeled as

Some of the queries below assume that the processor character set (6.5) contains the same collating sequence integers (6.6) as ASCII. Some queries assume 64 bit "double precision" IEEE floats.

#
  		Query 13211-1:1995
²: Cor.2, ³: Cor.3 		IF
V5.1B 		SWI
6.3.18-3* 		YAP
6.3.4 		B
7.8#5 		GNU
1.4.5 		SICStus
4.9β3 		Minerva
2.4 		XSB
5.0.0 		Ciao
1.20.0 		IV
1.4.2 		ECLiPSe
7.0#42 -L iso
** 		Scryer
0.9.3
#QueryCodexIFSWIYAPBGNUSICStusMinervaXSBCiaoIVECLiPSeScryer
number of conforming queries 323/326 259 232 239 243 322 299 228 201 245 273 324 326
recent improvements 8+16 28 60 62 44 53 67 21 new 1
recent regressions 1 4 1 20 2
misinterpretations 1 27 43 26 23 0 0 26 44 28 18 0 0
rejections 2 15 13 15 23 0 0 29 22 4 12 0 0
write syntax deviations 0 4 4 8 6 2 0 21 15 5 3 0 0
extensions 21 34 38 31 2 27 22 44 44 20 2 0
read/1 syntax OK #286 #203 #56 #49 #111 yes yes new #151 #251 #197 #35 yes yes
write_canonical/1 OK yes #18 #227 #227 #172 yes yes new #18 #1, #34 yes new yes yes yes
writeq/1 OK yes ³ #135 #156 #150 #18 #260 yes new #135 #1, #183 223 #135 yes yes
1 writeq('\n'). '\n' OK OK OK OK OK OK OK '
' 		OK new OK OK OK
2 ' syntax err. OK waits waits waits OK waits OK waits OK new waits OK OK
3 ) waits sy._e.(..) OK OK OK OK OK OK OK OK OK sy._e.(..) OK
261 )
'
syntax err. OK waits waits waits waits waits OK waits OK new waits OK OK
4 . syntax err. OK OK OK OK OK new OK OK OK OK OK OK OK
5 writeq(' '). % horiz. tab syntax err. '\t' '\t' '\t' '\t' OK new OK '\t' ' ' '\t' new '\t' OK OK
177 0'\t=0' . % horiz. tab syntax err. succeeds succeeds succeeds succeeds OK new OK succeeds succeeds new succeeds succeeds OK OK
6 writeq('
'). 		syntax err. OK '\n' OK '\n' OK OK OK '
' 		OK new OK OK OK
7 writeq('\
'). % "\\\n" 		'' OK OK new err reg OK new OK OK sy._e.(..) OK OK OK OK OK
8 writeq('\
a'). % "\\\na" 		a OK OK OK new OK new OK OK sy._e.(..) OK OK OK OK OK
9 writeq('a\
b'). % "a\\\nb" 		ab OK OK OK OK new OK OK sy._e.(..) OK OK OK OK OK
10 writeq('a\
 b'). % "a\\\n b" 		'a b' OK ab OK new OK new OK OK sy._e.(..) OK new OK OK OK OK
11 writeq('\ '). syntax err. OK OK new OK new OK new OK OK OK '\\ ' new '' '\\ ' OK OK
193 writeq('\
'). % "\\ \n" 		syntax err. OK OK new OK new OK new OK OK OK '\\
' 		OK new OK OK OK
12 writeq('\ '). % "\\\t" syntax err. OK OK new OK new OK new OK OK OK '\\ ' '' '\\\t' OK OK
13 writeq('\t'). '\t' OK OK OK OK OK OK OK ' ' OK new OK OK OK
14 writeq('\a'). e.g. '\a' OK OK OK OK OK OK '\u0007' '^G' OK new OK OK OK
15 writeq('\7\'). e.g. '\a' OK OK OK new OK OK OK '\u0007' '^G' OK new OK OK OK
16 writeq('\ca'). syntax err. OK a a new OK new OK OK OK '\\ca' new a '\\ca' OK OK
241 writeq('\d'). syntax err. OK OK '\177\' new OK OK '\x7F\' new OK '\\d' new '\177\' new '\\d' OK OK
17 writeq('\e'). syntax err. '\e' '\033\' '\033\' new OK new OK '\x1B\' new '\u001b' '\\e' new '\033\' new '\\e' OK OK
18 writeq('\033\'). e.g. '\33\' or repr. err. '\e' '\033\' '\033\' new '^[' '\x1b\' '\x1B\' new '\u001b' '^[' '\033\' '\x1b\' '\33\' '\x1b\'
301 writeq('\0\'). e.g. '\0\' or repr. err. syn. e. '\000\' '' ' err. '\x0\' '\u0000' '' '' '' '\0\' '\x0\'
19 char_code('\e',C). syntax err. C = 27 C = 27 C = 27 OK new OK C = 27 C = 27 t._e.(c.,..) new C = 27 t._e.(c.,..) OK OK
21 char_code('\d',C). syntax err. OK OK new C = 127 OK new OK C = 127 OK t._e.(c.,..) new C = 127 t._e.(c.,..) OK OK
22 writeq('\u1'). syntax err. OK OK OK new OK new OK OK OK '' new '\001\' '\\u1' OK OK
312 writeq('\u0021'). syntax err. OK ! ! OK OK OK ! ! ! '\\u0021' OK OK
313 put_code(0'\u0021). syntax err. OK ! ! OK OK waits ! ! ! OK OK OK
314 writeq("\u0021"). syntax err. OK [33] [33] OK OK OK [!] [33] [33] '\\u0021' OK OK
315 writeq('\x21\'). ! OK OK OK OK OK OK OK OK new OK OK OK OK
316 writeq('\x0021\'). ! OK OK OK OK OK OK OK OK new OK OK OK OK
23 X = 0'\u1. syntax err. OK OK new OK new OK OK OK OK X = 1 reg X = 1 reg OK OK OK
24 writeq(' syntax err. OK waits waits waits OK new waits OK waits OK new waits OK OK
25 writeq(. syntax err. OK OK OK OK OK new OK OK OK OK OK OK OK
26 '\
''. 		syntax err. OK waits waits new waits OK waits ex._e.(..) waits OK new waits OK OK
210 X = 0'\. syntax err. OK waits waits OK OK new OK OK X = 92. waits X = 92. OK OK
211 X = 0'\. . syntax err. OK OK new OK new OK OK OK OK X = 92. X = 46. OK OK OK
222 writeq((-)-(-)). (-)-(-) (-) - (-) (-)- (-) (-)- (-) OK OK OK (-) - (-) (-) - (-) new OK OK OK OK
223 writeq(((:-):-(:-))). (:-):-(:-) (:-) :- (:-) (:-):- (:-) (:-):- (:-) OK OK OK new (:-) :- (:-) ((:-) :- (:-)) new (:-):- :- OK OK OK
27 writeq((*)=(*)). (*)=(*) (*) = (*) (*)= (*) (*)= (*) new OK new OK OK new (*) = (*) (*) = (*) new * = * OK OK OK
28 writeq([:-,-]). [:-,-] ³ OK OK OK OK new OK OK [(:-),(-)] [(:-),(-)] reg OK OK OK OK
29 writeq(f(*)). f(*) OK OK OK OK new OK OK f((*)) f((*)) reg OK OK OK OK
30 writeq(a*(b+c)). a*(b+c) a * (b + c) a* (b+c) a* (b+c) OK OK OK a * (b + c) a * (b + c) OK OK OK OK
31 writeq(f(;,'|',';;')). f(;,'|',';;') OK OK OK OK new OK OK f((';'),'|',';;') f((';'),'|',';;') OK OK OK OK
32 writeq([.,.(.,.,.)]). ['.','.'('.','.','.')] ³ OK OK OK OK new OK OK OK [('.'),'.'(('.'),
('.'),('.'))] reg 		OK OK OK OK
33 writeq((a :- b,c)). a:-b,c³ a :- b , c OK OK OK OK OK a :- b , c (a :- b,c) OK OK OK OK
34 write_canonical([a]). '.'(a,[])³ OK OK '.'(a, []) new OK new OK OK [a] [a] OK .(a,[]) OK OK
35 writeq('/*'). '/*' OK OK OK new OK OK OK OK OK OK sy._e.(..) OK OK
203 writeq(//*). //* waits OK OK OK new OK OK '//*' OK OK OK OK OK
282 writeq(//*.*/). //*.*/ / OK OK OK OK OK '//*.*/' OK OK OK OK OK
36 writeq('/**'). '/**' OK OK OK new OK OK new OK OK OK OK sy._e.(..) OK OK
37 writeq('*/'). */ OK OK OK OK new OK new OK OK OK OK OK OK OK
38 "\'\`\"" = "'`""". % " succeeds syn. e. OK OK new OK OK OK OK OK new OK OK OK OK
179 "\'\"" = "'""". % " succeeds OK OK OK new OK OK OK OK OK new OK OK OK OK
178 "\`" = "`". succeeds syn. e. OK OK OK OK OK OK OK OK OK OK OK
39 '\'\`\"' = '''`"'. succeeds syn. e. OK OK new OK OK OK OK OK new OK OK OK OK
40 writeq('\'\`\"\"'). e.g. '\'`""' syn. e. OK OK new OK '''`""' OK '\'`\"\"' '''`""' new '''`""' OK OK OK
41 ('\\') = (\). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
42 op(1,xf,xf1).
1xf1 = xf1(1). 		succeeds OK OK new OK OK OK OK OK OK OK OK OK OK
43 X = 0X1. syntax err. OK OK OK new OK OK new OK OK OK OK OK OK OK
44 float(.0). syntax err. OK OK OK OK new OK OK OK succeeds OK OK OK OK
45 op(100,xfx,.).
functor(3 .2,F,A). 		F = ('.'), A = 2. OK OK OK OK new OK OK OK sy._e.(...) OK OK OK OK
46 float(- .0). syntax err. OK OK fails OK new OK OK OK succeeds OK OK OK OK
47 float(1E9). syntax err. succeeds succeeds succeeds OK OK OK succeeds succeeds reg OK OK OK OK
48 integer(1e). syntax err. succeeds OK OK OK OK OK OK OK OK OK OK OK
49 op(9,xf,e9).
1e9 = e9(1). 		succeeds fails fails fails OK OK OK fails fails reg OK OK OK OK
50 op(9,xf,e).
1e-9 = -(e(1),9). 		succeeds fails fails fails OK OK OK fails fails reg OK OK OK OK
51  /**/ 1.0e- 9 = -(e(1.0),9). succeeds fails OK sy._e.(..) reg sy._e.(..) OK OK OK sy._e.(..) OK OK OK OK
204  /**/ writeq(1e). e.g. 1 e 1 OK 1.0 OK OK OK OK sy._e.(..) reg OK OK OK OK
220  /**/ writeq(1.0e). e.g. 1.0 e 1.0 OK OK sy._e.(..) OK OK OK sy._e.(..) OK OK OK OK
52 op(9,xfy,e).
1.2e 3 = e(X,Y). 		X = 1.2, Y = 3. sy._e.(..) OK new OK sy._e.(..) OK OK OK sy._e.(..) OK OK OK OK
53 writeq(1.0e100). e.g. 1.0e+100 OK OK new OK new OK OK OK OK OK new OK OK OK OK
54 float(1.0ee9). syntax err. OK OK OK OK new OK OK OK OK OK OK OK OK
286 (- (1)) = -(1). succeeds° OK OK OK OK OK OK OK OK OK OK OK OK
287 (- -1) = -(-1). succeeds° OK OK OK OK OK OK OK OK OK OK OK OK
288 (- 1^2) = ^(-1,2). succeeds° OK fails OK OK OK OK OK OK OK OK OK OK
56 integer(- 1). succeeds OK fails OK OK OK new OK OK OK OK OK OK OK
57 integer('-'1). succeeds fails fails OK OK OK OK OK OK OK OK OK OK
58 integer('-' 1). succeeds fails fails OK OK OK new OK OK OK OK OK OK OK
59 integer(- /*.*/1). succeeds OK fails OK OK OK new OK OK OK OK OK OK OK
60 integer(-/*.*/1). syntax err. succeeds OK OK OK OK OK OK OK OK OK OK OK
61 integer('-'/*.*/1). succeeds fails fails OK OK OK new OK OK OK OK OK OK OK
62 atom(-/*.*/-). succeeds fails OK OK OK OK OK OK OK OK OK OK OK
63 op(0,fy,-). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
180  /**/ integer(-1). succeeds OK OK OK new OK OK OK OK OK OK sy._e.(..) OK OK
64  /**/ integer(- 1). succeeds OK sy._e.(..) OK new OK OK new OK OK OK OK sy._e.(..) OK OK
136  /**/ writeq(-(1)). -(1) OK OK OK OK new OK OK OK OK new OK OK OK OK
135 writeq(-(1)). - (1)³ - 1 - 1 OK new OK new OK new OK new - 1 OK new -(1) -1 OK OK
182 writeq(-(-1)). - -1 OK OK OK new - (-1) OK OK new OK - (-1) new -(-1) OK OK OK
183 writeq(-(1^2)). - (1^2)³ - 1 ^ 2 - 1^2 - (1)^2 new OK new OK new OK new - 1 ^ 2 - 1 ^ 2 reg -1^2 -1^2 OK OK
260 writeq(-(a^2)). - (a^2)³ - a ^ 2 -a^2 -a^2 -a^2 -a^2 OK new - a ^ 2 - a ^ 2 reg -a^2 -a^2 OK OK
139 writeq(-((a,b))). - (a,b)³ - (a , b) OK new OK new OK new OK OK new - (a , b) OK new OK OK OK OK
218 writeq(-(1*2)). - (1*2) - (1 * 2) OK new OK - ( (1*2)) OK OK new - (1 * 2) - (1 * 2) new OK OK OK OK
140 writeq(-a). -a - a OK OK OK new OK OK new - a - a OK OK OK OK
184 writeq(-(-)). - (-) OK OK new OK new -(-) OK OK new OK OK new OK OK OK OK
185 writeq(-[-]). -[-] ³ - [-] OK OK OK new OK OK new - [(-)] - [(-)] reg OK OK OK OK
188 writeq(-p(c)). -p(c) - p(c) OK OK OK new OK OK new - p(c) - p(c) OK OK OK OK
189 writeq(-{}). -{} - {} OK OK - {} OK OK new - {} - '{}' OK OK OK OK
190 writeq(-{a}). -{a}³ - {a} OK OK OK new OK OK new - {}(a) ³ - {a} OK OK OK OK
191 writeq(-(-a)). - -a - - a OK OK OK new OK OK new - - a - - a new OK OK OK OK
192 writeq(-(-(-a))). - - -a - - - a OK OK OK new OK OK new - - - a - - - a new OK OK OK OK
216 writeq(-(-(1))). - - (1) - - 1 - - 1 OK new - (- (1)) OK OK new - - 1 OK new - -(1) - -1 OK OK
215 op(100,yfx,~).
writeq(-(1~2~3)). 		- (1~2~3)³ - 1 ~ 2 ~ 3 - 1~2~3 - (1)~2~3
new 		OK new OK new OK new - 1 ~ 2 ~ 3 - 1 ~ 2 ~ 3 -1~2~3 -1~2~3 OK OK
248  /**/ writeq(- (1~2)). - (1~2)³ - 1 ~ 2 - 1~2 - (1)~2 OK OK OK new - 1 ~ 2 - 1 ~ 2 -1~2 -1~2 OK OK
249  /**/ writeq(1~2). 1~2 1 ~ 2 OK OK OK OK OK 1 ~ 2 1 ~ 2 OK OK OK OK
278 op(9,xfy,.), writeq(-[1]). -[1] - [1] OK OK OK OK OK new - 1 '.' [] - [1] OK OK OK OK
279 op(9,xf,'$VAR'), writeq(- '$VAR'(0)). -A ³ - A OK - (0)'$VAR' - (A) OK OK new - A - A new OK -0'$VAR' OK OK
296  /**/ writeq('$VAR'(0)). A OK OK 0 '$VAR' OK OK OK OK OK OK 0'$VAR' OK OK
55 op(1,yf,yf1).
{-1 yf1}={yf1(X)}. 		X = -1. OK OK OK OK OK OK sy._e.(..) OK OK OK OK OK
65 compound(+1). succeeds ² OK fails OK new OK OK OK new OK w.op OK OK OK w.op OK OK
66 compound(+ 1). succeeds ² OK OK OK new OK OK OK new OK w.op OK OK OK w.op OK OK
277 writeq(+1^2). +1^2 ² + 1 ^ 2 1^2 OK OK OK OK + 1 ^ 2 w.op + 1 ^ 2 OK OK w.op OK OK
67 op(0,fy,+).
compound(+1). 		syntax err. OK fails OK OK new OK OK new OK OK new OK OK OK OK
257 writeq([+{a},+[]]). [+{a},+[]] ² ³ [+ {a},+ []] OK OK [+{a},+ []] OK OK new [+ {}(a),+ []] [+ {a},+ []] OK OK w.op OK OK
68 [(:-)|(:-)]=[:-|:-]. succeeds OK OK OK OK OK new OK OK OK OK OK OK OK
69 X=[a|b,c]. syntax err. X=[a|(b,c)] OK OK OK OK OK OK OK OK OK OK OK
70 op(1000,xfy,','). p._e.(m., o.,',') OK OK OK OK OK OK succeeds OK succeeds OK OK OK
71 op(1001,xfy,','). p._e.(m., o.,',') or
p._e.(c., o.,',') 		OK OK OK OK OK OK succeeds OK OK OK OK OK
72 op(999,xfy,'|'). p._e.(c., o.,'|') ² succeeds OK OK p._e.(m., o.,'|') OK new OK new succeeds OK new succeeds succeeds OK OK
73  /**/ X=[a|b]. X=[a|b]. OK OK OK OK OK OK OK OK X=[a | b] new OK OK OK
285  /**/ X=[(a|b)]. syntax err. X=[a '|' b] X=[(a| b)] X=[(a|b)] X=[(a|b)] X=[(a|b)] X=[(a;b)] OK OK X=[a | b] OK X=[(a|b)] OK
219  /**/ [a|[]]=[a]. succeeds OK OK OK OK OK OK OK OK fails OK OK OK
74  /**/ X=[a|b|c]. syntax err. X=[a|(b|c)] OK OK OK OK OK OK OK X=[a | b | c ] OK OK OK
75 var(a:-b). syntax err. OK fails OK OK OK OK OK OK OK OK OK OK
76 :- = :- . syntax err. OK OK OK succeeds OK succeeds OK OK succeeds OK OK OK
77 - = - . syntax err. OK succeeds OK succeeds OK succeeds OK succeeds succeeds OK OK OK
78 * = * . syntax err. succeeds succeeds succeeds succeeds OK succeeds succeeds succeeds succeeds OK OK OK
79 current_op(200,fy,-). succeeds OK OK OK new OK OK OK OK OK new OK OK OK OK
80 current_op(200,fy,+). succeeds ² OK OK OK OK OK OK fails OK new OK fails OK OK
81 {- - c}={-(-(c))}. succeeds OK OK OK OK new OK OK OK OK new OK OK OK OK
82 (- -) = -(-). syntax err. succeeds succeeds succeeds succeeds OK succeeds succeeds succeeds succeeds OK OK OK
83 (- - -) = -(-(-)). syntax err. succeeds succeeds succeeds succeeds OK succeeds succeeds succeeds succeeds OK OK OK
84 (- - - -) = -(-(-(-))). syntax err. succeeds succeeds succeeds succeeds OK succeeds succeeds succeeds succeeds OK OK OK
85 {:- :- c} = {:-(:-,c)}. syntax err. OK OK succeeds succeeds OK succeeds OK OK succeeds OK OK OK
86 {- = - 1}={(-(=)) - 1}. syntax err. succeeds fails succeeds succeeds OK succeeds succeeds fails succeeds OK OK OK
87 write_canonical((- = - 1)). syntax err. -(-(=),1) =(-,-(1)) -(-(=),1) -(-(=),1) OK -(-(=),1) -(-(=),1) =(-,-1) -(-(=),1) OK OK OK
88 write_canonical((- = -1)). syntax err. -(-(=),1) =(-,-1) -(-(=),1) -(-(=),1) OK -(-(=),1) -(-(=),1) =(-,-1) -(-(=),1) OK OK OK
89 write_canonical((-;)). syntax err. OK OK -(;) -(;) OK -(;) -(';') OK new -(;) OK OK OK
90 write_canonical((-;-)). syntax err. ;(-,-) ;(-,-) OK ;(-,-) OK ;(-,-) OK ';'(-,-) reg ;(-,-) OK OK OK
91 write_canonical((:-;-)). syntax err. ;(:-,-) OK OK ;(:-,-) OK ;(:-,-) OK ';'(:-,-) reg ;(:-,-) OK OK OK
92 [:- -c] = [(:- -c)]. syntax err. OK succeeds fails fails OK fails OK OK fails OK OK OK
93 writeq([a,b|,]). syntax err. OK [a,b|','] OK OK OK OK OK OK OK OK OK OK
94 X ={,}. syntax err. OK X = {','}. OK OK OK OK OK OK OK OK OK OK
95 {1} = {}(1). succeeds OK OK OK OK new OK OK OK OK new OK OK OK OK
96 write_canonical({1}). {}(1) OK OK OK OK new OK OK OK '{}'(1) OK OK OK OK
97 '[]'(1) = [ ](X). X = 1 OK OK OK OK new OK OK OK sy._e.(..) OK OK OK OK
98 X = [] (1). syntax err. OK OK X = [](1) X = [](1) reg OK OK OK OK X = [](1) OK OK OK
99 op(100,yfy,op). d._e.(op._s., yfy) OK OK new OK OK OK OK succ./no eff. OK OK OK OK OK
100 '''' = '\''. succeeds OK OK OK new OK OK OK OK OK new OK OK OK OK
101 a = '\141\'. succeeds OK OK OK new OK new OK OK OK OK new OK OK OK OK
102 a = '\141'. syntax err. OK succeeds OK new OK OK OK OK succeeds waits OK OK OK
103 X = '\141\141'. X = a141 OK OK OK new OK new OK OK OK OK new OK OK OK OK
104 X = '\9'. syntax err. OK OK new OK new OK new OK OK OK X = '\\9' X = '9' X = '\\9' OK OK
105 X = '\N'. syntax err. OK OK new OK new OK new OK OK waits X = '\\N' X = 'N' X = '\\N' OK OK
106 X = '\\' . syntax err. X = (\) X = (\) X = (\) X = (\) OK new X = (\) X = (\) X = (\) X = (\) OK OK OK
107 X = '\77777777777\'. syntax/repr. err. OK OK new OK new OK new OK OK OK waits OK new X = ÿ. OK OK
108 a = '\x61\'. succeeds OK OK OK new OK OK OK OK OK new OK OK OK OK
109 atom_codes('\xG\',Cs). syntax err./waits OK waits OK new OK OK new OK waits waits Cs = [] reg waits OK OK
110 atom_codes('\xG1\',Cs). syntax err./waits OK waits OK new OK OK new waits waits waits new Cs = [1] waits OK OK
111 atom(`). syntax err. succeeds succeeds waits new succeeds OK new waits OK succeeds succeeds waits OK OK
112 atom(`+). syntax err. succeeds succeeds waits new succeeds OK new waits OK succeeds succeeds waits OK OK
297 atom(`
`). 		syntax err. OK OK err OK OK OK OK OK OK OK OK OK
113 X = `a`. syntax err. sy._e.(..) waits X = `a` reg sy._e.(..) X = 'a' OK new OK waits waits OK X = `a` OK
114 integer(0'\'). succeeds OK OK new OK OK OK OK OK OK OK OK OK OK
115 integer(0'''). succeeds OK OK new sy._e.(..) OK OK OK OK OK OK OK OK OK
116 0''' = 0'\'. succeeds OK OK new sy._e.(..) OK new OK OK OK OK new OK OK OK OK
117 integer(0''). syntax err. OK succeeds succeeds OK new OK new OK OK succeeds succeeds OK OK OK
195 op(100,xf,''). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
205  /**/ (0 '') = ''(X). X = 0. OK OK OK OK OK OK OK OK OK OK OK OK
196  /**/ writeq(0 ''). 0 '' or 0'' OK OK 0'' OK new OK OK OK OK new OK new 0'' OK OK
197  /**/ writeq(0''). 0 '' or 0'' sy._e.(..) 39 39 sy._e.(..) OK new OK new sy._e.(..) 39 39 sy._e.(..) OK OK
118 op(100,xfx,''). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
119  /**/ functor(0 ''1, F, A). F = (''), A = 2. OK OK OK OK OK OK OK OK OK OK OK OK
120  /**/ functor(0''1, F, A). F = (''), A = 2. sy._e.(..) sy._e.(..) sy._e.(..) F= -1, A=0 OK OK new sy._e.(..) sy._e.(..) sy._e.(..) sy._e.(..) OK OK
206 op(100,xf,f).
writeq(0'f'). 		syntax err. OK waits waits 102 OK waits OK 102 OK new waits OK OK
207  /**/ writeq(0'f'f'). e.g. 102 f OK OK OK syn. e. OK OK OK waits OK OK OK OK
209  /**/ writeq(0'ff). 102 f OK OK OK OK OK OK OK OK OK OK OK OK
256  /**/ writeq(0f). 0 f OK OK OK OK OK OK OK OK OK OK OK OK
208 op(100,xf,'f ').
writeq(0 'f '). 		0 'f ' OK OK OK OK new OK new OK OK OK OK 0'f ' OK OK
121 X = 2'1. syntax err. OK X = 1 X = 1 X = 1 OK new waits OK X = 1 X = 1 waits OK OK
122 op(100,xfx,'1').
functor(2'1'y, F, A). 		F = ('1'), A = 2. OK waits waits sy._e.(..) OK OK OK sy._e.(..) sy._e.(..) OK OK OK
262  /**/ functor(2 '1'y, F, A). F = ('1'), A = 2. OK OK OK OK OK OK OK OK OK OK OK OK
123 X =0'\x41\ . X = 65 repr. error OK sy._e.(..) OK new OK OK OK OK new OK OK OK OK
124 X =0'\x41\. X = 65 repr. err. waits waits OK new OK OK OK OK new OK OK OK OK
125 X =0'\x1\. X = 1 repr. err. waits waits OK new OK OK OK OK new OK OK OK OK
127 X is 16'mod'2. X = 0 OK OK new t._e.(..) sy._e.(..) OK OK OK waits OK OK OK OK
128 X is 37'mod'2. X = 1 OK OK new sy._e.(..) t._a.(..) OK OK OK sy._e.(..) OK OK OK OK
129 X is 0'mod'1. syntax err. waits waits waits OK OK new waits OK waits OK new waits. OK OK
130 X is 1'+'1. X = 2 OK OK new t._e.(..) reg sy._e.(..) OK OK OK sy._e.(..) OK OK OK OK
212 X is 1'\
+'1. 		X = 2. OK OK sy._e.(..) waits OK OK sy._e.(..) waits OK OK OK OK
213 X is 0'\
+'1. 		X = 1. repr. err. waits waits sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) sy._e.(..) waits OK OK
259 X = 0'\
+'/*'. %*/1. 		X = 0+1 repr. err. X = 10+'/*'. X = 43 sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) sy._e.(..) sy._e.(..) OK OK
303 X = 0'\
a. 		syntax err. OK OK OK OK OK OK OK X = 97 reg OK OK OK OK
214 X is 0'\ waits repr. err. OK OK OK OK new OK new sy._e.(..) OK OK OK OK OK
126 X = 0'\
.\ 		waits repr. err. sy._e.(..) OK new OK OK OK new sy._e.(..) OK OK OK OK OK
131 op(100,fx,' op'). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
132  /**/ writeq(' op' '1'). ' op' '1' OK OK new OK ' op' '1' OK OK OK OK new OK OK OK OK
133  /**/ writeq(' op'[]). ' op'[] ' op' [] OK ' op' [] ' op' [] OK OK ' op' [] ' op' [] OK OK OK OK
134 op(1,xf,xf1).
writeq({- =xf1}). 		syntax err. {- (=) xf1} { (-)= (xf1)} {- (=)xf1} {-(=)xf1} OK {- ((=)xf1)} {}(- (=) xf1) {(-) = (xf1)} new {- =xf1} OK OK OK
137 writeq(- (a*b)). - (a*b) - (a * b) OK new OK OK new OK OK new - (a * b) - (a * b) new OK OK OK OK
138 writeq(\ (a*b)). \ (a*b) \ (a * b) OK OK OK new OK OK \ (a * b) \ (a * b) new OK OK OK OK
141 current_op(P,xfy,.). fails OK OK P = 999 OK new OK OK OK P = 661 OK OK OK OK
142 op(100,xfy,.). succeeds OK OK OK OK new OK OK OK OK OK OK OK OK
143  /**/ writeq(1 .2). [1|2] OK OK OK OK new OK OK 1 '.' 2 syn. e. OK OK OK OK
144  /**/ writeq([1]). [1] OK OK OK OK OK OK 1 '.' [] OK OK OK OK OK
283  /**/ writeq(-[1]). -[1] - [1] OK OK OK OK OK new - 1 '.' [] - [1] OK OK OK OK
221  /**/ X = 1.e. X = [1|e]. OK OK OK OK OK OK X = 1 '.' e. syn. e. reg OK OK OK OK
258  /**/ writeq(ok).%
1 = X. 		ok X = 1 OK OK OK X = [writeq(
ok)|1] 		OK OK OK OK OK OK OK OK
145 write_canonical('$VAR'(0)). '$VAR'(0) OK OK new OK OK OK OK OK OK OK OK OK OK
146 write_term('$VAR'(0),[]). $VAR(0) OK OK OK A OK new OK OK OK new OK OK OK OK
244 writeq('$VAR'(0)). A ³ OK OK OK OK OK OK OK OK OK OK OK OK
245 writeq('$VAR'(-1)). '$VAR'(-1) OK S_1 OK new OK OK OK OK OK new OK OK OK OK
246 writeq('$VAR'(-2)). '$VAR'(-2) OK S_2 OK new OK OK OK OK OK new OK OK OK OK
247 writeq('$VAR'(x)). '$VAR'(x) OK OK OK new x OK OK new OK OK x OK OK OK
289 writeq('$VAR'('A')). '$VAR'('A') OK A OK new A OK OK OK '$VAR'(A) A OK OK OK
147 op(9,fy,fy),op(9,yf,yf).
write_canonical(fy 1 yf). 		fy(yf(1)) OK yf(fy(1)) OK OK OK OK syn. e. OK OK OK OK OK
148  /**/ write_canonical(fy yf). syntax err. fy(yf) fy(yf) fy(yf) fy(yf) OK fy(yf) fy(yf) yf(fy) fy(yf) OK OK OK
149  /**/ writeq(fy(yf(1))). fy 1 yf OK OK OK OK OK OK fy yf(1) OK OK OK OK OK
150  /**/ writeq(yf(fy(1))). (fy 1)yf (fy 1) yf fy 1 yf fy 1 yf OK OK OK yf(fy 1) fy 1 yf reg OK OK OK OK
319  /**/ writeq(yf(fy(yf(fy(1))))). (fy (fy 1)yf)yf (fy (fy 1) yf) yf fy fy 1 yf yf fy fy 1 yf yf OK OK OK yf(fy yf(fy 1)) fy fy 1 yf yf OK OK OK OK
151 op(9,fy,fy),op(9,yfx,yfx).
write_canonical(fy 1 yfx 2). 		fy(yfx(1,2)) OK yfx(fy(1), 2) OK OK OK OK yfx(fy(1), 2) OK OK OK OK OK
152  /**/ writeq(fy(yfx(1,2))). fy 1 yfx 2 OK OK OK OK OK OK OK OK OK OK OK OK
153  /**/ writeq(yfx(fy(1),2)). (fy 1)yfx 2 (fy 1) yfx 2 fy 1 yfx 2 fy 1 yfx 2 OK OK OK fy 1 yfx 2 fy 1 yfx 2 OK OK OK OK
154 op(9,yf,yf),op(9,xfy,xfy).
write_canonical(1 xfy 2 yf). 		xfy(1,yf(2)) OK yf(xfy(1, 2)) OK OK OK OK syn. e. OK OK OK OK OK
155  /**/ writeq(xfy(1,yf(2))). 1 xfy 2 yf OK OK OK OK OK OK 1 xfy yf(2) OK OK OK OK OK
156  /**/ writeq(yf(xfy(1,2))). (1 xfy 2)yf (1 xfy 2) yf 1 xfy 2 yf 1 xfy 2 yf OK OK OK yf(1 xfy 2) 1 xfy 2 yf OK OK OK OK
157 op(0,xfy,:-).
current_op(P,xfx,:-). 		fails OK OK OK p._e.(m., o.,:-) OK OK OK P = 1200 OK OK OK OK
158 op(0,xfy,','). p._e.(m., o.,',') OK OK OK OK OK OK succ./no eff. OK OK OK OK OK
159 op(9,fy,f),op(9,yf,f).
write_canonical(f f 0). 		f(f(0)) OK OK OK OK OK OK OK syn. e. OK OK OK OK
201  /**/ writeq(f(f(0))). e.g. f f 0 OK OK OK 0 f f OK 0 f f OK OK 0 f f OK OK OK
202  /**/ write_canonical(f 0 f). f(f(0)) OK OK OK OK OK OK syn. e. OK OK OK OK OK
160  /**/ write_canonical(0 f f). f(f(0)) OK OK OK OK OK OK syn. e. OK OK OK OK OK
161  /**/ write_canonical(f f). syntax err. f(f) f(f) f(f) f(f) OK f(f) f(f) f(f) f(f) OK OK OK
162 op(9,fy,p),op(9,yfx,p).
write_canonical(1 p p p 2). 		syntax err. OK OK p(p(1,p), 2) p(p(1,p), 2) OK p(p(1,p), 2) OK OK p(p(1,p), 2) OK OK OK
163 op(9,fy,p),op(9,xfy,p).
write_canonical(1 p p p 2). 		p(1, p(p(2))) OK OK OK OK OK OK OK OK OK OK OK OK
164 op(7,fy,p),op(9,yfx,p).
write_canonical(1 p p p 2). 		p(1, p(p(2))) OK OK OK OK new OK OK OK OK new OK OK OK OK
165 atom('.''-''.'). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
166 op(0,xfy,'|'). succeeds OK OK OK new p._e.(m., o.,'|') OK new OK OK OK OK OK OK OK
167  /**/ writeq((a|b)). syntax err. OK OK OK new a|b OK new a;b OK (a;b) OK OK OK OK
168 op(0,xfy,.),op(9,yf,.). succeeds OK OK OK OK new OK OK OK OK OK OK OK OK
169  /**/ writeq(.(.)). ('.')'.' ('.') '.' OK OK ('.') '.' new OK OK new '.'('.') ('.') '.' new '.' '.' OK OK OK
194 op(0,xfy,.),writeq((.)+(.)). '.'+'.' '.' + '.' OK ('.')+ ('.') OK new OK OK '.' + '.' '.' + '.' OK OK OK OK
170 set_prolog_flag(
 double_quotes,chars). 		succeeds OK OK OK OK OK OK OK d._e.(p., d.). OK OK OK OK
171  /**/ writeq("a"). [a] ³ OK OK OK OK OK OK OK [97] [97] OK OK OK
229  /**/ writeq("\z"). syntax err. OK OK OK new OK OK OK OK [92,112] reg [122] OK OK OK
300  /**/ writeq("\0\"). e.g. ['\0\'] syn. e. ['\000\'] [] ['] syn. e. ['\x0\'] ['\u0000'] [] [0] [] OK ['\x0\']
172 X is 10.0** -323, writeq(X). e.g. 1.0e-323 9.8..
e-324 		1.0e-323 1.0e-323 new 0.0 9.8..
e-324 		1.0E-323 1.0E-323 9.8..
e-324 new 		1.0e-323 1.0e-323 9.8..
e-324 		OK
173 1.0e-323=:=10.0** -323. succeeds re._e.(num.) OK new OK OK OK OK OK OK fails OK OK OK
174 -1 = -0x1. succeeds OK OK OK OK OK OK OK OK OK OK OK OK
175 T = t(0b1,0o1,0x1). T = t(1,1,1) OK OK OK OK OK OK OK OK OK OK OK OK
176 X is 0b1mod 2. X = 1 OK OK OK OK OK OK OK OK OK OK OK OK
217 op(1105,xfy,'|'). succeeds OK OK OK p._e.(m., o.,'|') OK OK OK OK OK OK OK OK
181  /**/ writeq((a-->b,c|d)). a-->b,c|d² ³ a --> b , c '|' d OK new OK new OK OK OK new syn. e. (a --> b,c;d) a-->b,c | d sy._e.(..) OK OK
322  /**/ write_canonical((a|b;c)). '|'(a,;(b,c)) OK OK OK OK OK OK sy. e. ';'(a,';'(b,c)) OK sy._e.(..) OK OK
323  /**/ write_canonical((a;b|c)). '|'(;(a,b),c) OK OK OK OK OK OK new sy. e. ';'(a,';'(b,c)) OK sy._e.(..) OK OK
290  /**/ writeq([(a|b)]). [(a|b)] ³ [(a '|' b)] OK OK OK OK OK syn. e. [(a;b)] [(a | b)] sy._e.(..) OK OK
317  /**/ writeq([a,(b,c)|[]]). [a,(b,c)] [a,(b , c)] [a, (b,c)] OK OK OK OK [a,(b , c)] OK new OK OK OK OK
186 X/* /*/=7. X = 7 OK waits OK new OK OK OK OK OK OK OK OK OK
187 X/*/*/=7. X = 7 OK waits OK new OK OK OK OK OK OK OK OK OK
198 atom($-). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
199 atom(-$). succeeds OK OK OK fails OK OK OK OK OK OK OK OK
200 op(900, fy, [$]).
write_canonical($a+b). 		$(+(a,b)) OK OK OK +('$a',b) OK OK OK OK OK OK OK OK
224 \ . ex._e.(..) OK OK OK OK OK OK OK OK OK u.((\)/0) OK OK
225 char_code(C,0), writeq(C). '\0\' or rep._e. rep._e. '\000\' '' rep._e. rep._e. '\x0\' '\u0000' '' de._e. '' '\0\' '\x0\'
250 writeq('\0\'). rep._e. or '\0\' sy._e.(..) '\000\' '' ' sy._e.(..) '\x0\' '\u0000' '' d._e. '' '\0\' '\x0\'
226 write_canonical(_+_). e.g. +(_1,_2) +(_164,
_165) 		+(_,_) +(_,_) +(_2f0,
_314) 		+(_23,
_24) 		+(_430,
_448) 		+(_583,
_657) 		+(_h164,
_h173) 		+(_5692,
_5705) 		+(_905,
_906) 		+(_62,
_63) 		+(_36,
_37)
227 write_canonical(B+B). e.g. +(_1,
_1) 		+(_164,
_164) 		+(A,A) +(A,A) +(_338,
_338) 		+(_23,
_23) 		+(_430,
_430) 		+(_583,
_583) 		+(_h164,
_h164) 		+(_5692,
_5692) 		+(_259,
_259) 		+(_61,
_61) 		+(_36,
_36)
228 writeq(0'\z). syntax err. OK OK -1 OK OK OK OK OK 122 OK OK OK
230 char_code('\^',X). syntax err. OK OK OK OK OK OK OK t._e.(..) X = 94 t._e.(..) OK OK
231 writeq(0'\c). syntax err. OK 99 OK OK OK OK OK OK OK OK OK OK
232 writeq(0'\ ). syntax err. OK OK 32 OK OK OK OK 92 OK 92 OK OK
233 writeq(nop (1)). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK
234 op(400,fx,f).
writeq(f/*.*/(1,2)). 		f (1,2)³ OK OK OK OK OK OK f (1 , 2) OK new OK OK OK OK
235  /**/ writeq(1 = f). syntax err. 1 = (f) 1= (f) 1= (f) 1=(f) OK 1=(f) 1 = (f) 1 = (f) new 1=(f) OK OK OK
236 write_canonical(a- - -b). -(a,-(-(b))) OK OK OK OK OK OK OK OK new OK OK OK OK
237 op(699,xf,>). p._e.(c.,op,>) OK succeeds succeeds succeeds OK succeeds succeeds OK new succeeds OK OK OK
238  /**/ writeq(>(>(a),b)). >(a)>b >(a) > b a> > b a> >b (a>)>b OK (a>)>b >(a >,b) >(a) > b (a>)>b OK OK OK
239  /**/ write_canonical(a> >b). syntax err. OK syntax err. >(>(a),b) syntax err. OK >(>(a),b) syntax err. OK new >(>(a),b) OK OK OK
242  /**/ write_canonical(a> =b). syntax err. OK syntax err. =(>(a),b) syntax err. OK =(>(a),b) =(>(a),b) OK new =(>(a),b) OK OK OK
243  /**/ write_canonical((a>,b)). syntax err. OK ','(>(a),b) ','(>(a),b) syntax err. OK ','(>(a),b) ','(>(a),b) OK new ','(>(a),b) OK OK OK
240  /**/ write_canonical(a>). syntax err. OK >(a) >(a) syntax err. OK >(a) syntax err. OK new >(a) OK OK OK
251 op(9,yfx,[bop,bo,b,op,xor]).
writeq(0bop 2). 		0 bop 2 OK sy._e.(..) 0 op 2 sy._e.(..) OK new OK new sy._e.(..) 0 op 2 OK OK OK OK
263  /**/ writeq(0 bop 2). 0 bop 2 OK OK OK OK OK OK OK OK OK OK OK OK
252  /**/ writeq(0bo 2). 0 bo 2 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK OK OK OK
253  /**/ writeq(0b 2). 0 b 2 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK OK OK OK
254  /**/ writeq(0op 2). 0 op 2 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK OK OK OK
255  /**/ writeq(0xor 2). 0 xor 2 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK sy._e.(..) OK OK
264 writeq('^`'). '^`' ^` ^` ^` OK OK OK OK ^` ^` OK OK OK
265 op(9,yf,[b2,o8]). succeeds OK OK OK OK OK OK OK OK OK OK OK OK
266  /**/ writeq(0b2). 0 b2 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK OK OK OK
267  /**/ writeq(0o8). 0 o8 OK sy._e.(..) sy._e.(..) sy._e.(..) OK new OK new sy._e.(..) sy._e.(..) OK OK OK OK
268 op(500, xfy, {}). p._e.(c.,o.,{}) ² succ succ. reg OK new OK new OK new OK new succ OK new succ succ OK OK
269 writeq('\b\r\f\t\n'). '\b\r\f\t\n' OK OK OK OK OK OK OK '
' 		OK new OK OK OK
270 get_char(C). %a C = ' ' C = '%' C = '%' C = '%' C = '%' OK new OK OK C = '%' reg C = '%' OK OK OK
271 get_char(C).%a C = '%' C = '\n' + C = '\n' + C = '\n' + waits OK OK OK waits reg C = '\n' + OK OK OK
272 writeq(0B1). syntax err. OK OK OK 1 OK OK OK OK OK OK OK OK
274 op(20,fx,--),writeq(--(a)). --a OK OK OK OK OK OK -- a -- a OK OK OK OK
275  /**/ op(0,fy,--),writeq(--(a)). --(a) OK OK OK --a OK OK OK -- a OK OK OK OK
276 writeq(0xamod 2). 10 mod 2 OK OK OK OK OK OK OK OK OK OK OK OK
280 writeq(00'+'1). 0+1 0 + 1 waits waits sy._e.(..) OK OK 0 + 1 sy._e.(..) OK OK OK OK
281 writeq(00'a). syntax err. OK OK 97 97 OK OK OK 97 OK waits OK OK
284 writeq('\^J'). syntax err. OK OK '\t' OK OK OK OK '\\^J' '\n' new '\\^J' OK OK
291 writeq([(a,b)]). [(a,b)] [(a , b)] OK OK OK OK OK [(a , b)] OK OK OK OK OK
292 writeq(1= \\). 1= \\ OK OK OK OK OK OK 1 = \\ 1 = \\ OK OK OK OK
293 writeq((,)). syntax err. OK ',' OK OK OK OK OK OK OK OK OK OK
294 writeq({[}). syntax err. OK OK OK OK OK OK OK OK OK {'['} OK OK
295 writeq({(}). syntax err. OK OK OK OK OK OK OK OK OK {'('} OK OK
298 writeq([a,b|c]). [a,b|c] OK OK OK OK OK OK OK OK OK OK [a, b|c] OK
299 (\+ (a,b)) = \+(T). T = (a,b) OK OK OK OK OK OK OK OK OK OK OK OK
302 [] = '[]'. succeeds OK OK OK OK OK OK OK OK OK OK OK OK
304 op(300,fy,~). writeq(~ (a=b)). ~ (a=b) ~ (a = b) OK OK OK OK OK ~ (a = b) ~ (a = b) OK OK ~ (a = b) OK
305 writeq(\ (a=b)). \ (a=b) \ (a = b) OK OK OK OK OK \ (a = b) \ (a = b) OK OK \ (a = b) OK
306 writeq(+ (a=b)). + (a=b) + (a = b) OK OK OK OK OK + (a = b) + (a = b) OK OK w.op + (a = b) OK
307 writeq([/*.*/]). [] OK OK OK OK OK OK OK OK OK OK OK OK
308 writeq(.+). .+ OK OK OK OK OK OK OK OK OK OK OK OK
309 writeq({a,b}). {a,b} {a , b} OK OK OK OK OK {}((a , b)) {(a,b)} reg OK OK OK OK
310 writeq({\+ (}). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK
311 writeq(\+ (()). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK
318 writeq(+((1*2)^3)). + (1*2)^3 + (1 * 2) ^ 3 OK OK OK OK OK + (1 * 2) ^ 3 w.op + (1 * 2) ^ 3 new OK +(1*2)^3 w.op OK OK
327 writeq(-((1*2)^3)). - ((1*2)^3) - (1 * 2) ^ 3 - (1*2)^3 - (1*2)^3 - ( (1*2)^3) - (1*2)^3 OK - (1 * 2) ^ 3 - (1 * 2) ^ 3 - (1*2)^3 -((1*2)^3) OK OK
320 writeq([a|\+2]). [a|\+2] [a|\+ 2] OK OK OK OK OK [a|\+ 2] OK OK OK OK OK
321 writeq((a)(b)). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK
324 writeq('%'). '%' OK OK OK OK OK OK OK OK OK OK OK OK
325 writeq({[y}]). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK
326 (>)(1,2). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK new
328 Finis (). syntax err. OK OK OK OK OK OK OK OK OK OK OK OK

Remarks

/**/requires preceding test without /**/
² including Cor.2 (from approved DTC2)
³ including Cor.3 (from approved WDCor.3)
° most recent finds, for WDCor4
XXXlicense expired
*more recent versions are not considered for conformity reasons
**default mode non-conforming, but optional iso and iso_strict mode (5.1 e) (since 7.0 2018-01)
+Requires an extra newline as input
w.opRequires extra operator declaration
@@@not yet tested (difficult reproduction)
n/anot applicable (for parser only)
#71 There are two possible errors:
permission_error(modify, operator, ',') due to 8.14.3.3 j
permission_error(create, operator, ',') due to 8.14.3.3 l which applies because Priority 1001 for comma is invalid due to 6.3.4.3.
#28.14.1.1 defines when a syntax error may be produced. There are actually two possibilities: Syntax errors on the token level and on the syntax level. Syntax level errors may only be produced when an end token (6.4.8) is encountered. But syntax errors on the token level have to be identified earlier on since the end token (6.4.8) must be identified in 8.14.1.1 i.
#275In step 8.14.3.1 d it is tested
d) If Op is not currently an operator with the same
operator class (prefix, infix or postfix) as Op_specifier, ...
and in case it is an operator:
e) The operator property of Op with the same class as
Op_specifier is removed, so that Op is no longer an
operator of that class,
Now, will an operator declared as fx be removed with fy or not? Note:
3.162 specifier (of an operator): One of the atoms fx,
fy, xfx, xfy, yfx, xf or yf. A specifier denotes the
class and associativity of an operator (see 6.3.4).
3.31 class (of an operator): The class of an operator
defines whether it is a prefix, infix, or postfix operator
(see 6.3.4).
3.11 associativity (of an operator): Property of being
non-associative, right-associative, or left-associative (see
6.3.4, table 4).
Table 4 — Specifiers for operators
Specifier Class Associativity
fxprefix non-associative
fyprefix right-associative
xfxinfix non-associative
xfyinfix right-associative
yfxinfix left-associative
xf postfix non-associative
yf postfix left-associative

Deleted cases

20: Subsumed by #18
273: Left out

History

2010-11-04: start
2010-11-14: revision 1.1
2010-11-26: revision 1.11
2011-05-25: revision 1.66
2017-08-07: revision 1.209 renamed to conformity_testing
2023-07-25: revision 1.250
Version Control
Validated HTML