1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2010, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 3, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
19 -- http://www.gnu.org/licenses for a complete copy of the license. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 -- This version of the Style package implements the standard GNAT style
27 -- checking rules. For documentation of these rules, see comments on the
28 -- individual procedures.
30 with Atree; use Atree;
31 with Casing; use Casing;
32 with Csets; use Csets;
33 with Einfo; use Einfo;
34 with Err_Vars; use Err_Vars;
36 with Scans; use Scans;
37 with Sinfo; use Sinfo;
38 with Sinput; use Sinput;
39 with Stylesw; use Stylesw;
41 package body Styleg is
45 Blank_Lines : Nat := 0;
46 -- Counts number of empty lines seen. Reset to zero if a non-empty line
47 -- is encountered. Used to check for trailing blank lines in Check_EOF,
48 -- and for multiple blank lines.
50 Blank_Line_Location : Source_Ptr;
51 -- Remembers location of first blank line in a series. Used to issue an
52 -- appropriate diagnostic if subsequent blank lines or the end of file
55 -----------------------
56 -- Local Subprograms --
57 -----------------------
59 procedure Check_No_Space_After;
60 -- Checks that there is a non-white space character after the current
61 -- token, or white space followed by a comment, or the end of line.
62 -- Issue error message if not.
64 procedure Check_No_Space_Before;
65 -- Check that token is first token on line, or else is not preceded
66 -- by white space. Signal error of space not allowed if not.
68 procedure Check_Separate_Stmt_Lines_Cont;
69 -- Non-inlined continuation of Check_Separate_Stmt_Lines
71 function Determine_Token_Casing return Casing_Type;
72 -- Determine casing of current token
74 procedure Error_Space_Not_Allowed (S : Source_Ptr);
75 -- Posts an error message indicating that a space is not allowed
76 -- at the given source location.
78 procedure Error_Space_Required (S : Source_Ptr);
79 -- Posts an error message indicating that a space is required at
80 -- the given source location.
82 function Is_White_Space (C : Character) return Boolean;
83 pragma Inline (Is_White_Space);
84 -- Returns True for space, HT, VT or FF, False otherwise
86 procedure Require_Following_Space;
87 pragma Inline (Require_Following_Space);
88 -- Require token to be followed by white space. Used only if in GNAT
89 -- style checking mode.
91 procedure Require_Preceding_Space;
92 pragma Inline (Require_Preceding_Space);
93 -- Require token to be preceded by white space. Used only if in GNAT
94 -- style checking mode.
96 ----------------------
97 -- Check_Abs_Or_Not --
98 ----------------------
100 -- In check tokens mode (-gnatyt), ABS/NOT must be followed by a space
102 procedure Check_Abs_Not is
104 if Style_Check_Tokens then
105 if Source (Scan_Ptr) > ' ' then
106 Error_Space_Required (Scan_Ptr);
111 ----------------------
112 -- Check_Apostrophe --
113 ----------------------
115 -- Do not allow space before or after apostrophe
117 procedure Check_Apostrophe is
119 if Style_Check_Tokens then
120 Check_No_Space_After;
122 end Check_Apostrophe;
128 -- In check tokens mode (-gnatys), arrow must be surrounded by spaces
130 procedure Check_Arrow is
132 if Style_Check_Tokens then
133 Require_Preceding_Space;
134 Require_Following_Space;
138 --------------------------
139 -- Check_Attribute_Name --
140 --------------------------
142 -- In check attribute casing mode (-gnatya), attribute names must be
143 -- mixed case, i.e. start with an upper case letter, and otherwise
144 -- lower case, except after an underline character.
146 procedure Check_Attribute_Name (Reserved : Boolean) is
147 pragma Warnings (Off, Reserved);
149 if Style_Check_Attribute_Casing then
150 if Determine_Token_Casing /= Mixed_Case then
151 Error_Msg_SC -- CODEFIX
152 ("(style) bad capitalization, mixed case required");
155 end Check_Attribute_Name;
157 ---------------------------
158 -- Check_Binary_Operator --
159 ---------------------------
161 -- In check token mode (-gnatyt), binary operators other than the special
162 -- case of exponentiation require surrounding space characters.
164 procedure Check_Binary_Operator is
166 if Style_Check_Tokens then
167 Require_Preceding_Space;
168 Require_Following_Space;
170 end Check_Binary_Operator;
172 ----------------------------
173 -- Check_Boolean_Operator --
174 ----------------------------
176 procedure Check_Boolean_Operator (Node : Node_Id) is
178 function OK_Boolean_Operand (N : Node_Id) return Boolean;
179 -- Returns True for simple variable, or "not X1" or "X1 and X2" or
180 -- "X1 or X2" where X1, X2 are recursively OK_Boolean_Operand's.
182 ------------------------
183 -- OK_Boolean_Operand --
184 ------------------------
186 function OK_Boolean_Operand (N : Node_Id) return Boolean is
188 if Nkind_In (N, N_Identifier, N_Expanded_Name) then
191 elsif Nkind (N) = N_Op_Not then
192 return OK_Boolean_Operand (Original_Node (Right_Opnd (N)));
194 elsif Nkind_In (N, N_Op_And, N_Op_Or) then
195 return OK_Boolean_Operand (Original_Node (Left_Opnd (N)))
197 OK_Boolean_Operand (Original_Node (Right_Opnd (N)));
202 end OK_Boolean_Operand;
204 -- Start of processig for Check_Boolean_Operator
206 if Style_Check_Boolean_And_Or
207 and then Comes_From_Source (Node)
210 Orig : constant Node_Id := Original_Node (Node);
213 if Nkind_In (Orig, N_Op_And, N_Op_Or) then
215 L : constant Node_Id := Original_Node (Left_Opnd (Orig));
216 R : constant Node_Id := Original_Node (Right_Opnd (Orig));
219 -- First OK case, simple boolean constants/identifiers
221 if OK_Boolean_Operand (L)
223 OK_Boolean_Operand (R)
227 -- Second OK case, modular types
229 elsif Is_Modular_Integer_Type (Etype (Node)) then
232 -- Third OK case, array types
234 elsif Is_Array_Type (Etype (Node)) then
237 -- Otherwise we have an error
239 elsif Nkind (Orig) = N_Op_And then
241 ("(style) `AND THEN` required", Sloc (Orig));
244 ("(style) `OR ELSE` required", Sloc (Orig));
250 end Check_Boolean_Operator;
256 -- In check token mode (-gnatyt), box must be preceded by a space or by
257 -- a left parenthesis. Spacing checking on the surrounding tokens takes
258 -- care of the remaining checks.
260 procedure Check_Box is
262 if Style_Check_Tokens then
263 if Prev_Token /= Tok_Left_Paren then
264 Require_Preceding_Space;
273 -- In check token mode (-gnatyt), colon must be surrounded by spaces
275 procedure Check_Colon is
277 if Style_Check_Tokens then
278 Require_Preceding_Space;
279 Require_Following_Space;
283 -----------------------
284 -- Check_Colon_Equal --
285 -----------------------
287 -- In check token mode (-gnatyt), := must be surrounded by spaces
289 procedure Check_Colon_Equal is
291 if Style_Check_Tokens then
292 Require_Preceding_Space;
293 Require_Following_Space;
295 end Check_Colon_Equal;
301 -- In check token mode (-gnatyt), comma must be either the first
302 -- token on a line, or be preceded by a non-blank character.
303 -- It must also always be followed by a blank.
305 procedure Check_Comma is
307 if Style_Check_Tokens then
308 Check_No_Space_Before;
310 if Source (Scan_Ptr) > ' ' then
311 Error_Space_Required (Scan_Ptr);
320 -- In check comment mode (-gnatyc) there are several requirements on the
321 -- format of comments. The following are permissible comment formats:
323 -- 1. Any comment that is not at the start of a line, i.e. where the
324 -- initial minuses are not the first non-blank characters on the
325 -- line must have at least one blank after the second minus or a
326 -- special character as defined in rule 5.
328 -- 2. A row of all minuses of any length is permitted (see procedure
329 -- box above in the source of this routine).
331 -- 3. A comment line starting with two minuses and a space, and ending
332 -- with a space and two minuses. Again see the procedure title box
333 -- immediately above in the source.
335 -- 4. A full line comment where two spaces follow the two minus signs.
336 -- This is the normal comment format in GNAT style, as typified by
337 -- the comments you are reading now.
339 -- 5. A full line comment where the first character after the second
340 -- minus is a special character, i.e. a character in the ASCII
341 -- range 16#21#..16#2F# or 16#3A#..16#3F#. This allows special
342 -- comments, such as those generated by gnatprep, or those that
343 -- appear in the SPARK annotation language to be accepted.
345 -- Note: for GNAT internal files (-gnatg switch set on for the
346 -- compilation), the only special sequence recognized and allowed
347 -- is --! as generated by gnatprep.
349 -- 6. In addition, the comment must be properly indented if comment
350 -- indentation checking is active (Style_Check_Indentation non-zero).
351 -- Either the start column must be a multiple of this indentation,
352 -- or the indentation must match that of the next non-blank line.
354 procedure Check_Comment is
358 function Is_Box_Comment return Boolean;
359 -- Returns True if the last two characters on the line are -- which
360 -- characterizes a box comment (as for example follows this spec).
362 function Is_Special_Character (C : Character) return Boolean;
363 -- Determines if C is a special character (see rule 5 above)
365 function Same_Column_As_Next_Non_Blank_Line return Boolean;
366 -- Called for a full line comment. If the indentation of this comment
367 -- matches that of the next non-blank line in the source, then True is
368 -- returned, otherwise False.
374 function Is_Box_Comment return Boolean is
378 -- Do we need to worry about UTF_32 line terminators here ???
381 while Source (S) not in Line_Terminator loop
385 return Source (S - 1) = '-' and then Source (S - 2) = '-';
388 --------------------------
389 -- Is_Special_Character --
390 --------------------------
392 function Is_Special_Character (C : Character) return Boolean is
398 Character'Pos (C) in 16#21# .. 16#2F#
400 Character'Pos (C) in 16#3A# .. 16#3F#;
402 end Is_Special_Character;
404 ----------------------------------------
405 -- Same_Column_As_Next_Non_Blank_Line --
406 ----------------------------------------
408 function Same_Column_As_Next_Non_Blank_Line return Boolean is
412 -- Step to end of line
415 while Source (P) not in Line_Terminator loop
419 -- Step past blanks, and line terminators (UTF_32 case???)
421 while Source (P) <= ' ' and then Source (P) /= EOF loop
427 return Get_Column_Number (Scan_Ptr) = Get_Column_Number (P);
428 end Same_Column_As_Next_Non_Blank_Line;
430 -- Start of processing for Check_Comment
433 -- Can never have a non-blank character preceding the first minus
435 if Style_Check_Comments then
436 if Scan_Ptr > Source_First (Current_Source_File)
437 and then Source (Scan_Ptr - 1) > ' '
439 Error_Msg_S -- CODEFIX
440 ("(style) space required");
444 -- For a comment that is not at the start of the line, the only
445 -- requirement is that we cannot have a non-blank character after
446 -- the second minus sign or a special character.
448 if Scan_Ptr /= First_Non_Blank_Location then
449 if Style_Check_Comments then
450 if Source (Scan_Ptr + 2) > ' '
451 and then not Is_Special_Character (Source (Scan_Ptr + 2))
454 ("(style) space required", Scan_Ptr + 2);
460 -- Case of a comment that is at the start of a line
463 -- First check, must be in appropriately indented column
465 if Style_Check_Indentation /= 0 then
466 if Start_Column rem Style_Check_Indentation /= 0 then
467 if not Same_Column_As_Next_Non_Blank_Line then
468 Error_Msg_S -- CODEFIX
469 ("(style) bad column");
476 -- If we are not checking comments, nothing more to do
478 if not Style_Check_Comments then
482 -- Case of not followed by a blank. Usually wrong, but there are
483 -- some exceptions that we permit.
485 if Source (Scan_Ptr + 2) /= ' ' then
486 C := Source (Scan_Ptr + 2);
488 -- Case of -- all on its own on a line is OK
494 -- Case of --x, x special character is OK (gnatprep/SPARK/etc.)
495 -- This is not permitted in internal GNAT implementation units
496 -- except for the case of --! as used by gnatprep output.
498 if Is_Special_Character (C) then
502 -- The only other case in which we allow a character after
503 -- the -- other than a space is when we have a row of minus
504 -- signs (case of header lines for a box comment for example).
507 while Source (S) >= ' ' loop
508 if Source (S) /= '-' then
509 if Is_Box_Comment then
510 Error_Space_Required (Scan_Ptr + 2);
513 ("(style) two spaces required", Scan_Ptr + 2);
522 -- If we are followed by a blank, then the comment is OK if the
523 -- character following this blank is another blank or a format
526 elsif Source (Scan_Ptr + 3) <= ' ' then
529 -- Here is the case where we only have one blank after the two
530 -- minus signs, which is an error unless the line ends with two
531 -- minus signs, the case of a box comment.
533 elsif not Is_Box_Comment then
534 Error_Space_Required (Scan_Ptr + 3);
543 -- In check token mode (-gnatyt), colon must be surrounded by spaces
545 procedure Check_Dot_Dot is
547 if Style_Check_Tokens then
548 Require_Preceding_Space;
549 Require_Following_Space;
557 -- In check blanks at end mode, check no blank lines precede the EOF
559 procedure Check_EOF is
561 if Style_Check_Blank_Lines then
563 -- We expect one blank line, from the EOF, but no more than one
565 if Blank_Lines = 2 then
567 ("(style) blank line not allowed at end of file",
568 Blank_Line_Location);
570 elsif Blank_Lines >= 3 then
572 ("(style) blank lines not allowed at end of file",
573 Blank_Line_Location);
578 -----------------------------------
579 -- Check_Exponentiation_Operator --
580 -----------------------------------
582 -- No spaces are required for the ** operator in GNAT style check mode
584 procedure Check_Exponentiation_Operator is
587 end Check_Exponentiation_Operator;
593 -- In check horizontal tab mode (-gnatyh), tab characters are not allowed
595 procedure Check_HT is
597 if Style_Check_Horizontal_Tabs then
598 Error_Msg_S -- CODEFIX
599 ("(style) horizontal tab not allowed");
603 -----------------------
604 -- Check_Indentation --
605 -----------------------
607 -- In check indentation mode (-gnatyn for n a digit), a new statement or
608 -- declaration is required to start in a column that is a multiple of the
609 -- indentation amount.
611 procedure Check_Indentation is
613 if Style_Check_Indentation /= 0 then
614 if Token_Ptr = First_Non_Blank_Location
615 and then Start_Column rem Style_Check_Indentation /= 0
617 Error_Msg_SC -- CODEFIX
618 ("(style) bad indentation");
621 end Check_Indentation;
623 ----------------------
624 -- Check_Left_Paren --
625 ----------------------
627 -- In tone check mode (-gnatyt), left paren must not be preceded by an
628 -- identifier character or digit (a separating space is required) and
629 -- may never be followed by a space.
631 procedure Check_Left_Paren is
633 if Style_Check_Tokens then
634 if Token_Ptr > Source_First (Current_Source_File)
635 and then Identifier_Char (Source (Token_Ptr - 1))
637 Error_Space_Required (Token_Ptr);
640 Check_No_Space_After;
642 end Check_Left_Paren;
644 ---------------------------
645 -- Check_Line_Max_Length --
646 ---------------------------
648 -- In check max line length mode (-gnatym), the line length must
649 -- not exceed the permitted maximum value.
651 procedure Check_Line_Max_Length (Len : Int) is
653 if Style_Check_Max_Line_Length then
654 if Len > Style_Max_Line_Length then
656 ("(style) this line is too long",
657 Current_Line_Start + Source_Ptr (Style_Max_Line_Length));
660 end Check_Line_Max_Length;
662 ---------------------------
663 -- Check_Line_Terminator --
664 ---------------------------
666 -- In check blanks at end mode (-gnatyb), lines may not end with a
669 -- In check form feeds mode (-gnatyf), the line terminator may not
670 -- be either of the characters FF or VT.
672 -- In check DOS line terminators node (-gnatyd), the line terminator
673 -- must be a single LF, without a following CR.
675 procedure Check_Line_Terminator (Len : Int) is
679 -- Length of line (adjusted down for blanks at end of line)
682 -- Reset count of blank lines if first line
684 if Get_Logical_Line_Number (Scan_Ptr) = 1 then
688 -- Check FF/VT terminators
690 if Style_Check_Form_Feeds then
691 if Source (Scan_Ptr) = ASCII.FF then
692 Error_Msg_S -- CODEFIX
693 ("(style) form feed not allowed");
694 elsif Source (Scan_Ptr) = ASCII.VT then
695 Error_Msg_S -- CODEFIX
696 ("(style) vertical tab not allowed");
700 -- Check DOS line terminator
702 if Style_Check_DOS_Line_Terminator then
704 -- Ignore EOF, since we only get called with an EOF if it is the last
705 -- character in the buffer (and was therefore not in the source file),
706 -- since the terminating EOF is added to stop the scan.
708 if Source (Scan_Ptr) = EOF then
711 -- Bad terminator if we don't have an LF
713 elsif Source (Scan_Ptr) /= LF then
714 Error_Msg_S ("(style) incorrect line terminator");
718 -- Remove trailing spaces
721 while L > 0 and then Is_White_Space (Source (S - 1)) loop
726 -- Issue message for blanks at end of line if option enabled
728 if Style_Check_Blanks_At_End and then L < Len then
730 ("(style) trailing spaces not permitted", S);
733 -- Deal with empty (blank) line
737 -- Increment blank line count
739 Blank_Lines := Blank_Lines + 1;
741 -- If first blank line, record location for later error message
743 if Blank_Lines = 1 then
744 Blank_Line_Location := Scan_Ptr;
747 -- Non-blank line, check for previous multiple blank lines
750 if Style_Check_Blank_Lines and then Blank_Lines > 1 then
752 ("(style) multiple blank lines", Blank_Line_Location);
755 -- And reset blank line count
759 end Check_Line_Terminator;
761 --------------------------
762 -- Check_No_Space_After --
763 --------------------------
765 procedure Check_No_Space_After is
769 if Is_White_Space (Source (Scan_Ptr)) then
771 -- Allow one or more spaces if followed by comment
775 if Source (S) = '-' and then Source (S + 1) = '-' then
778 elsif Is_White_Space (Source (S)) then
786 Error_Space_Not_Allowed (Scan_Ptr);
788 end Check_No_Space_After;
790 ---------------------------
791 -- Check_No_Space_Before --
792 ---------------------------
794 procedure Check_No_Space_Before is
796 if Token_Ptr > First_Non_Blank_Location
797 and then Source (Token_Ptr - 1) <= ' '
799 Error_Space_Not_Allowed (Token_Ptr - 1);
801 end Check_No_Space_Before;
803 -----------------------
804 -- Check_Pragma_Name --
805 -----------------------
807 -- In check pragma casing mode (-gnatyp), pragma names must be mixed
808 -- case, i.e. start with an upper case letter, and otherwise lower case,
809 -- except after an underline character.
811 procedure Check_Pragma_Name is
813 if Style_Check_Pragma_Casing then
814 if Determine_Token_Casing /= Mixed_Case then
815 Error_Msg_SC -- CODEFIX
816 ("(style) bad capitalization, mixed case required");
819 end Check_Pragma_Name;
821 -----------------------
822 -- Check_Right_Paren --
823 -----------------------
825 -- In check tokens mode (-gnatyt), right paren must not be immediately
826 -- followed by an identifier character, and must never be preceded by
827 -- a space unless it is the initial non-blank character on the line.
829 procedure Check_Right_Paren is
831 if Style_Check_Tokens then
832 if Identifier_Char (Source (Token_Ptr + 1)) then
833 Error_Space_Required (Token_Ptr + 1);
836 Check_No_Space_Before;
838 end Check_Right_Paren;
840 ---------------------
841 -- Check_Semicolon --
842 ---------------------
844 -- In check tokens mode (-gnatyt), semicolon does not permit a preceding
845 -- space and a following space is required.
847 procedure Check_Semicolon is
849 if Style_Check_Tokens then
850 Check_No_Space_Before;
852 if Source (Scan_Ptr) > ' ' then
853 Error_Space_Required (Scan_Ptr);
858 -------------------------------
859 -- Check_Separate_Stmt_Lines --
860 -------------------------------
862 procedure Check_Separate_Stmt_Lines is
864 if Style_Check_Separate_Stmt_Lines then
865 Check_Separate_Stmt_Lines_Cont;
867 end Check_Separate_Stmt_Lines;
869 ------------------------------------
870 -- Check_Separate_Stmt_Lines_Cont --
871 ------------------------------------
873 procedure Check_Separate_Stmt_Lines_Cont is
877 -- Skip past white space
880 while Is_White_Space (Source (S)) loop
884 -- Line terminator is OK
886 if Source (S) in Line_Terminator then
891 elsif Source (S) = '-' and then Source (S + 1) = '-' then
894 -- ABORT keyword is OK after THEN (THEN ABORT case)
896 elsif Token = Tok_Then
897 and then (Source (S + 0) = 'a' or else Source (S + 0) = 'A')
898 and then (Source (S + 1) = 'b' or else Source (S + 1) = 'B')
899 and then (Source (S + 2) = 'o' or else Source (S + 2) = 'O')
900 and then (Source (S + 3) = 'r' or else Source (S + 3) = 'R')
901 and then (Source (S + 4) = 't' or else Source (S + 4) = 'T')
902 and then (Source (S + 5) in Line_Terminator
903 or else Is_White_Space (Source (S + 5)))
907 -- PRAGMA keyword is OK after ELSE
909 elsif Token = Tok_Else
910 and then (Source (S + 0) = 'p' or else Source (S + 0) = 'P')
911 and then (Source (S + 1) = 'r' or else Source (S + 1) = 'R')
912 and then (Source (S + 2) = 'a' or else Source (S + 2) = 'A')
913 and then (Source (S + 3) = 'g' or else Source (S + 3) = 'G')
914 and then (Source (S + 4) = 'm' or else Source (S + 4) = 'M')
915 and then (Source (S + 5) = 'a' or else Source (S + 5) = 'A')
916 and then (Source (S + 6) in Line_Terminator
917 or else Is_White_Space (Source (S + 6)))
921 -- Otherwise we have the style violation we are looking for
924 if Token = Tok_Then then
926 ("(style) no statements may follow THEN on same line", S);
929 ("(style) no statements may follow ELSE on same line", S);
932 end Check_Separate_Stmt_Lines_Cont;
938 -- In check if then layout mode (-gnatyi), we expect a THEN keyword
939 -- to appear either on the same line as the IF, or on a separate line
940 -- after multiple conditions. In any case, it may not appear on the
941 -- line immediately following the line with the IF.
943 procedure Check_Then (If_Loc : Source_Ptr) is
945 if Style_Check_If_Then_Layout then
946 if Get_Physical_Line_Number (Token_Ptr) =
947 Get_Physical_Line_Number (If_Loc) + 1
949 Error_Msg_SC ("(style) misplaced THEN");
954 -------------------------------
955 -- Check_Unary_Plus_Or_Minus --
956 -------------------------------
958 -- In check token mode (-gnatyt), unary plus or minus must not be
959 -- followed by a space.
961 procedure Check_Unary_Plus_Or_Minus is
963 if Style_Check_Tokens then
964 Check_No_Space_After;
966 end Check_Unary_Plus_Or_Minus;
968 ------------------------
969 -- Check_Vertical_Bar --
970 ------------------------
972 -- In check token mode (-gnatyt), vertical bar must be surrounded by spaces
974 procedure Check_Vertical_Bar is
976 if Style_Check_Tokens then
977 Require_Preceding_Space;
978 Require_Following_Space;
980 end Check_Vertical_Bar;
982 -----------------------
983 -- Check_Xtra_Parens --
984 -----------------------
986 procedure Check_Xtra_Parens (Loc : Source_Ptr) is
988 if Style_Check_Xtra_Parens then
990 ("redundant parentheses?", Loc);
992 end Check_Xtra_Parens;
994 ----------------------------
995 -- Determine_Token_Casing --
996 ----------------------------
998 function Determine_Token_Casing return Casing_Type is
1000 return Determine_Casing (Source (Token_Ptr .. Scan_Ptr - 1));
1001 end Determine_Token_Casing;
1003 -----------------------------
1004 -- Error_Space_Not_Allowed --
1005 -----------------------------
1007 procedure Error_Space_Not_Allowed (S : Source_Ptr) is
1009 Error_Msg -- CODEFIX
1010 ("(style) space not allowed", S);
1011 end Error_Space_Not_Allowed;
1013 --------------------------
1014 -- Error_Space_Required --
1015 --------------------------
1017 procedure Error_Space_Required (S : Source_Ptr) is
1019 Error_Msg -- CODEFIX
1020 ("(style) space required", S);
1021 end Error_Space_Required;
1023 --------------------
1024 -- Is_White_Space --
1025 --------------------
1027 function Is_White_Space (C : Character) return Boolean is
1029 return C = ' ' or else C = HT;
1036 function Mode_In_Check return Boolean is
1038 return Style_Check and Style_Check_Mode_In;
1045 -- In check end/exit labels mode (-gnatye), always require the name of
1046 -- a subprogram or package to be present on the END, so this is an error.
1048 procedure No_End_Name (Name : Node_Id) is
1050 if Style_Check_End_Labels then
1051 Error_Msg_Node_1 := Name;
1052 Error_Msg_SP -- CODEFIX
1053 ("(style) `END &` required");
1061 -- In check end/exit labels mode (-gnatye), always require the name of
1062 -- the loop to be present on the EXIT when exiting a named loop.
1064 procedure No_Exit_Name (Name : Node_Id) is
1066 if Style_Check_End_Labels then
1067 Error_Msg_Node_1 := Name;
1068 Error_Msg_SP -- CODEFIX
1069 ("(style) `EXIT &` required");
1073 ----------------------------
1074 -- Non_Lower_Case_Keyword --
1075 ----------------------------
1077 -- In check casing mode (-gnatyk), reserved keywords must be spelled
1078 -- in all lower case (excluding keywords range, access, delta and digits
1079 -- used as attribute designators).
1081 procedure Non_Lower_Case_Keyword is
1083 if Style_Check_Keyword_Casing then
1084 Error_Msg_SC -- CODEFIX
1085 ("(style) reserved words must be all lower case");
1087 end Non_Lower_Case_Keyword;
1089 -----------------------------
1090 -- Require_Following_Space --
1091 -----------------------------
1093 procedure Require_Following_Space is
1095 if Source (Scan_Ptr) > ' ' then
1096 Error_Space_Required (Scan_Ptr);
1098 end Require_Following_Space;
1100 -----------------------------
1101 -- Require_Preceding_Space --
1102 -----------------------------
1104 procedure Require_Preceding_Space is
1106 if Token_Ptr > Source_First (Current_Source_File)
1107 and then Source (Token_Ptr - 1) > ' '
1109 Error_Space_Required (Token_Ptr);
1111 end Require_Preceding_Space;