[latex3-commits] [l3svn] r6772 - Only allow the last argument to be empty in l3fp (fixes #320)

noreply at latex-project.org noreply at latex-project.org
Sat Dec 3 04:46:42 CET 2016


Author: bruno
Date: 2016-12-03 04:46:41 +0100 (Sat, 03 Dec 2016)
New Revision: 6772

Modified:
   trunk/l3kernel/l3fp-parse.dtx
   trunk/l3kernel/testfiles/m3expl001.luatex.tlg
   trunk/l3kernel/testfiles/m3expl001.ptex.tlg
   trunk/l3kernel/testfiles/m3expl001.tlg
   trunk/l3kernel/testfiles/m3expl001.uptex.tlg
   trunk/l3kernel/testfiles/m3expl001.xetex.tlg
   trunk/l3kernel/testfiles/m3expl003.luatex.tlg
   trunk/l3kernel/testfiles/m3expl003.ptex.tlg
   trunk/l3kernel/testfiles/m3expl003.tlg
   trunk/l3kernel/testfiles/m3expl003.uptex.tlg
   trunk/l3kernel/testfiles/m3expl003.xetex.tlg
   trunk/l3kernel/testfiles/m3fp-parse002.tlg
   trunk/l3kernel/testfiles/m3fp-rand001.ptex.tlg
   trunk/l3kernel/testfiles/m3fp-rand001.tlg
   trunk/l3kernel/testfiles/m3fp-rand001.uptex.tlg
   trunk/l3kernel/testfiles/m3fp-rand001.xetex.tlg
   trunk/l3kernel/testfiles/m3fp-round002.lvt
   trunk/l3kernel/testfiles/m3fp-round002.tlg
Log:
Only allow the last argument to be empty in l3fp (fixes #320)

The culprit was commit r6750: to allow rand() I had made
multi-argument functions in l3fp allow (and ignore) empty
argument.  Now only the last argument can be empty.


Modified: trunk/l3kernel/l3fp-parse.dtx
===================================================================
--- trunk/l3kernel/l3fp-parse.dtx	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/l3fp-parse.dtx	2016-12-03 03:46:41 UTC (rev 6772)
@@ -1827,28 +1827,12 @@
 %    \end{macrocode}
 % \end{macro}
 %
-% \begin{macro}[aux, EXP, verb]{\@@_parse_prefix_,:Nw}
 % \begin{macro}[aux, EXP]{\@@_parse_prefix_):Nw}
-%   The right parenthesis and the comma can appear as unary prefixes
-%   when an argument of a multi-argument function is missing (for
-%   instance the first and last ones in |max(,1,2,)| or in |rand()|).
-%   In single-argument functions (precedence~$0$ rather than~$1$) forbid
-%   this.
+%   The right parenthesis can appear as unary prefixes when arguments of
+%   a multi-argument function end with a comma, or when there is no
+%   argument, as in |max(1,2,)| or in |rand()|.  In single-argument
+%   functions (precedence~$0$ rather than~$1$) forbid this.
 %    \begin{macrocode}
-\cs_new:cpn { @@_parse_prefix_,:Nw } #1
-  {
-    \if_int_compare:w #1 = \c_one
-      \exp_after:wN \@@_parse_one:Nw
-      \exp_after:wN #1
-    \else:
-      \__msg_kernel_expandable_error:nnn
-        { kernel } { fp-missing-number } { , }
-      \exp_after:wN \c_nan_fp \exp:w \exp_end_continue_f:w
-      \exp_after:wN \@@_parse_infix:NN
-      \exp_after:wN #1
-      \exp_after:wN ,
-    \fi:
-  }
 \cs_new:cpn { @@_parse_prefix_):Nw } #1
   {
     \if_int_compare:w #1 = \c_one
@@ -1861,7 +1845,6 @@
   }
 %    \end{macrocode}
 % \end{macro}
-% \end{macro}
 %
 % \subsubsection{Constants}
 %

Modified: trunk/l3kernel/testfiles/m3expl001.luatex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl001.luatex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl001.luatex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3581,7 +3581,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl001.ptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl001.ptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl001.ptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3572,7 +3572,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl001.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl001.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl001.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3572,7 +3572,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl001.uptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl001.uptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl001.uptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3572,7 +3572,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl001.xetex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl001.xetex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl001.xetex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3579,7 +3579,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl003.luatex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl003.luatex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl003.luatex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3582,7 +3582,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl003.ptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl003.ptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl003.ptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3573,7 +3573,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl003.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl003.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl003.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3573,7 +3573,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl003.uptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl003.uptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl003.uptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3573,7 +3573,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3expl003.xetex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3expl003.xetex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3expl003.xetex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -3580,7 +3580,6 @@
 Defining \__fp_parse_prefix_.:Nw on line ...
 Defining \__fp_parse_prefix_(:Nw on line ...
 Defining \__fp_parse_lparen_after:NwN on line ...
-Defining \__fp_parse_prefix_,:Nw on line ...
 Defining \__fp_parse_prefix_):Nw on line ...
 Defining \__fp_parse_word_inf:N on line ...
 Defining \__fp_parse_word_nan:N on line ...

Modified: trunk/l3kernel/testfiles/m3fp-parse002.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-parse002.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-parse002.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -150,9 +150,36 @@
 TEST 7: Extra or missing arguments
 ============================================================
 > min()=inf.
-> max(, \c_space_tl ,,)=-inf.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+> max(, \c_space_tl ,,)=nan.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            Unexpected comma: extra arguments ignored.
 l. ...  }
 The control sequence at the end of the top line

Modified: trunk/l3kernel/testfiles/m3fp-rand001.ptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-rand001.ptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-rand001.ptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -70,7 +70,7 @@
 ============================================================
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
-                           Random numbers unavailable
+                           Missing number before ','.
 l. ...  }
 The control sequence at the end of the top line
 of your error message was never \def'ed. If you have
@@ -97,6 +97,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           rand() expects between 0 and 0 arguments.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            randint() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line

Modified: trunk/l3kernel/testfiles/m3fp-rand001.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-rand001.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-rand001.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -44,6 +44,15 @@
 ============================================================
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            rand() expects between 0 and 0 arguments.
 l. ...  }
 The control sequence at the end of the top line
@@ -62,6 +71,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           rand() expects between 0 and 0 arguments.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            randint() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line
@@ -150,10 +168,10 @@
 misspelled it (e.g., `\hobx'), type `I' and the correct
 spelling (e.g., `I\hbox'). Otherwise just continue,
 and I'll forget about whatever was undefined.
-0.5455874475799493
 nan
 nan
 nan
+nan
 1
 nan
 nan

Modified: trunk/l3kernel/testfiles/m3fp-rand001.uptex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-rand001.uptex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-rand001.uptex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -70,7 +70,7 @@
 ============================================================
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
-                           Random numbers unavailable
+                           Missing number before ','.
 l. ...  }
 The control sequence at the end of the top line
 of your error message was never \def'ed. If you have
@@ -97,6 +97,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           rand() expects between 0 and 0 arguments.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            randint() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line

Modified: trunk/l3kernel/testfiles/m3fp-rand001.xetex.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-rand001.xetex.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-rand001.xetex.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -70,7 +70,7 @@
 ============================================================
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
-                           Random numbers unavailable
+                           Missing number before ','.
 l. ...  }
 The control sequence at the end of the top line
 of your error message was never \def'ed. If you have
@@ -97,6 +97,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           rand() expects between 0 and 0 arguments.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            randint() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line

Modified: trunk/l3kernel/testfiles/m3fp-round002.lvt
===================================================================
--- trunk/l3kernel/testfiles/m3fp-round002.lvt	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-round002.lvt	2016-12-03 03:46:41 UTC (rev 6772)
@@ -25,18 +25,22 @@
     \fp_to_tl:n { round(1, -inf) } \NEWLINE
     \fp_to_tl:n { round(1, 1e999) } \NEWLINE
     \fp_to_tl:n { round(1, -1e999) } \NEWLINE
+    \fp_to_tl:n { round(,4) } \NEWLINE
     \fp_to_tl:n { trunc() } \NEWLINE
     \fp_to_tl:n { trunc(0.1) } \NEWLINE
     \fp_to_tl:n { trunc(0.1, 1.2) } \NEWLINE
     \fp_to_tl:n { trunc(1, 2, 3) } \NEWLINE
+    \fp_to_tl:n { trunc(,4) } \NEWLINE
     \fp_to_tl:n { ceil() } \NEWLINE
     \fp_to_tl:n { ceil(0.1) } \NEWLINE
     \fp_to_tl:n { ceil(0.1, 1.2) } \NEWLINE
     \fp_to_tl:n { ceil(1, 2, 3) } \NEWLINE
+    \fp_to_tl:n { ceil(,4) } \NEWLINE
     \fp_to_tl:n { floor() } \NEWLINE
     \fp_to_tl:n { floor(0.1) } \NEWLINE
     \fp_to_tl:n { floor(0.1, 1.2) } \NEWLINE
     \fp_to_tl:n { floor(1, 2, 3) } \NEWLINE
+    \fp_to_tl:n { floor(,4) } \NEWLINE
   }
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Modified: trunk/l3kernel/testfiles/m3fp-round002.tlg
===================================================================
--- trunk/l3kernel/testfiles/m3fp-round002.tlg	2016-11-28 15:13:25 UTC (rev 6771)
+++ trunk/l3kernel/testfiles/m3fp-round002.tlg	2016-12-03 03:46:41 UTC (rev 6772)
@@ -51,6 +51,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            trunc() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line
@@ -78,6 +87,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            ceil() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line
@@ -105,6 +123,15 @@
 and I'll forget about whatever was undefined.
 ! Undefined control sequence.
 <argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
                            floor() expects between 1 and 2 arguments.
 l. ...  }
 The control sequence at the end of the top line
@@ -130,6 +157,15 @@
 misspelled it (e.g., `\hobx'), type `I' and the correct
 spelling (e.g., `I\hbox'). Otherwise just continue,
 and I'll forget about whatever was undefined.
+! Undefined control sequence.
+<argument> \LaTeX3 error: 
+                           Missing number before ','.
+l. ...  }
+The control sequence at the end of the top line
+of your error message was never \def'ed. If you have
+misspelled it (e.g., `\hobx'), type `I' and the correct
+spelling (e.g., `I\hbox'). Otherwise just continue,
+and I'll forget about whatever was undefined.
 nan
 0
 nan
@@ -141,17 +177,21 @@
 1
 0
 nan
+nan
 0
 nan
 nan
 nan
+nan
 1
 nan
 nan
 nan
+nan
 0
 nan
 nan
+nan
 ============================================================
 ============================================================
 TEST 2: Rounding with third argument



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