1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2011, 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 processing for Check_Boolean_Operator
207 if Style_Check_Boolean_And_Or
208 and then Comes_From_Source (Node)
211 Orig : constant Node_Id := Original_Node (Node);
214 if Nkind_In (Orig, N_Op_And, N_Op_Or) then
216 L : constant Node_Id := Original_Node (Left_Opnd (Orig));
217 R : constant Node_Id := Original_Node (Right_Opnd (Orig));
220 -- First OK case, simple boolean constants/identifiers
222 if OK_Boolean_Operand (L)
224 OK_Boolean_Operand (R)
228 -- Second OK case, modular types
230 elsif Is_Modular_Integer_Type (Etype (Node)) then
233 -- Third OK case, array types
235 elsif Is_Array_Type (Etype (Node)) then
238 -- Otherwise we have an error
240 elsif Nkind (Orig) = N_Op_And then
242 ("(style) `AND THEN` required", Sloc (Orig));
245 ("(style) `OR ELSE` required", Sloc (Orig));
251 end Check_Boolean_Operator;
257 -- In check token mode (-gnatyt), box must be preceded by a space or by
258 -- a left parenthesis. Spacing checking on the surrounding tokens takes
259 -- care of the remaining checks.
261 procedure Check_Box is
263 if Style_Check_Tokens then
264 if Prev_Token /= Tok_Left_Paren then
265 Require_Preceding_Space;
274 -- In check token mode (-gnatyt), colon must be surrounded by spaces
276 procedure Check_Colon is
278 if Style_Check_Tokens then
279 Require_Preceding_Space;
280 Require_Following_Space;
284 -----------------------
285 -- Check_Colon_Equal --
286 -----------------------
288 -- In check token mode (-gnatyt), := must be surrounded by spaces
290 procedure Check_Colon_Equal is
292 if Style_Check_Tokens then
293 Require_Preceding_Space;
294 Require_Following_Space;
296 end Check_Colon_Equal;
302 -- In check token mode (-gnatyt), comma must be either the first
303 -- token on a line, or be preceded by a non-blank character.
304 -- It must also always be followed by a blank.
306 procedure Check_Comma is
308 if Style_Check_Tokens then
309 Check_No_Space_Before;
311 if Source (Scan_Ptr) > ' ' then
312 Error_Space_Required (Scan_Ptr);
321 -- In check comment mode (-gnatyc) there are several requirements on the
322 -- format of comments. The following are permissible comment formats:
324 -- 1. Any comment that is not at the start of a line, i.e. where the
325 -- initial minuses are not the first non-blank characters on the
326 -- line must have at least one blank after the second minus or a
327 -- special character as defined in rule 5.
329 -- 2. A row of all minuses of any length is permitted (see procedure
330 -- box above in the source of this routine).
332 -- 3. A comment line starting with two minuses and a space, and ending
333 -- with a space and two minuses. Again see the procedure title box
334 -- immediately above in the source.
336 -- 4. A full line comment where two spaces follow the two minus signs.
337 -- This is the normal comment format in GNAT style, as typified by
338 -- the comments you are reading now.
340 -- 5. A full line comment where the first character after the second
341 -- minus is a special character, i.e. a character in the ASCII
342 -- range 16#21#..16#2F# or 16#3A#..16#3F#. This allows special
343 -- comments, such as those generated by gnatprep, or those that
344 -- appear in the SPARK annotation language to be accepted.
346 -- Note: for GNAT internal files (-gnatg switch set on for the
347 -- compilation), the only special sequence recognized and allowed
348 -- is --! as generated by gnatprep.
350 -- 6. In addition, the comment must be properly indented if comment
351 -- indentation checking is active (Style_Check_Indentation non-zero).
352 -- Either the start column must be a multiple of this indentation,
353 -- or the indentation must match that of the next non-blank line.
355 procedure Check_Comment is
359 function Is_Box_Comment return Boolean;
360 -- Returns True if the last two characters on the line are -- which
361 -- characterizes a box comment (as for example follows this spec).
363 function Is_Special_Character (C : Character) return Boolean;
364 -- Determines if C is a special character (see rule 5 above)
366 function Same_Column_As_Next_Non_Blank_Line return Boolean;
367 -- Called for a full line comment. If the indentation of this comment
368 -- matches that of the next non-blank line in the source, then True is
369 -- returned, otherwise False.
375 function Is_Box_Comment return Boolean is
379 -- Do we need to worry about UTF_32 line terminators here ???
382 while Source (S) not in Line_Terminator loop
386 return Source (S - 1) = '-' and then Source (S - 2) = '-';
389 --------------------------
390 -- Is_Special_Character --
391 --------------------------
393 function Is_Special_Character (C : Character) return Boolean is
399 Character'Pos (C) in 16#21# .. 16#2F#
401 Character'Pos (C) in 16#3A# .. 16#3F#;
403 end Is_Special_Character;
405 ----------------------------------------
406 -- Same_Column_As_Next_Non_Blank_Line --
407 ----------------------------------------
409 function Same_Column_As_Next_Non_Blank_Line return Boolean is
413 -- Step to end of line
416 while Source (P) not in Line_Terminator loop
420 -- Step past blanks, and line terminators (UTF_32 case???)
422 while Source (P) <= ' ' and then Source (P) /= EOF loop
428 return Get_Column_Number (Scan_Ptr) = Get_Column_Number (P);
429 end Same_Column_As_Next_Non_Blank_Line;
431 -- Start of processing for Check_Comment
434 -- Can never have a non-blank character preceding the first minus
436 if Style_Check_Comments then
437 if Scan_Ptr > Source_First (Current_Source_File)
438 and then Source (Scan_Ptr - 1) > ' '
440 Error_Msg_S -- CODEFIX
441 ("(style) space required");
445 -- For a comment that is not at the start of the line, the only
446 -- requirement is that we cannot have a non-blank character after
447 -- the second minus sign or a special character.
449 if Scan_Ptr /= First_Non_Blank_Location then
450 if Style_Check_Comments then
451 if Source (Scan_Ptr + 2) > ' '
452 and then not Is_Special_Character (Source (Scan_Ptr + 2))
455 ("(style) space required", Scan_Ptr + 2);
461 -- Case of a comment that is at the start of a line
464 -- First check, must be in appropriately indented column
466 if Style_Check_Indentation /= 0 then
467 if Start_Column rem Style_Check_Indentation /= 0 then
468 if not Same_Column_As_Next_Non_Blank_Line then
469 Error_Msg_S -- CODEFIX
470 ("(style) bad column");
477 -- If we are not checking comments, nothing more to do
479 if not Style_Check_Comments then
483 -- Case of not followed by a blank. Usually wrong, but there are
484 -- some exceptions that we permit.
486 if Source (Scan_Ptr + 2) /= ' ' then
487 C := Source (Scan_Ptr + 2);
489 -- Case of -- all on its own on a line is OK
495 -- Case of --x, x special character is OK (gnatprep/SPARK/etc.)
496 -- This is not permitted in internal GNAT implementation units
497 -- except for the case of --! as used by gnatprep output.
499 if Is_Special_Character (C) then
503 -- The only other case in which we allow a character after
504 -- the -- other than a space is when we have a row of minus
505 -- signs (case of header lines for a box comment for example).
508 while Source (S) >= ' ' loop
509 if Source (S) /= '-' then
511 or else Style_Check_Comments_Spacing = 1
513 Error_Space_Required (Scan_Ptr + 2);
516 ("(style) two spaces required", Scan_Ptr + 2);
525 -- If we are followed by a blank, then the comment is OK if the
526 -- character following this blank is another blank or a format
527 -- effector, or if the required comment spacing is 1.
529 elsif Source (Scan_Ptr + 3) <= ' '
530 or else Style_Check_Comments_Spacing = 1
534 -- Here is the case where we only have one blank after the two minus
535 -- signs, with Style_Check_Comments_Spacing set to 2, which is an
536 -- error unless the line ends with two minus signs, the case of a
539 elsif not Is_Box_Comment then
540 Error_Space_Required (Scan_Ptr + 3);
549 -- In check token mode (-gnatyt), colon must be surrounded by spaces
551 procedure Check_Dot_Dot is
553 if Style_Check_Tokens then
554 Require_Preceding_Space;
555 Require_Following_Space;
563 -- In check blanks at end mode, check no blank lines precede the EOF
565 procedure Check_EOF is
567 if Style_Check_Blank_Lines then
569 -- We expect one blank line, from the EOF, but no more than one
571 if Blank_Lines = 2 then
573 ("(style) blank line not allowed at end of file",
574 Blank_Line_Location);
576 elsif Blank_Lines >= 3 then
578 ("(style) blank lines not allowed at end of file",
579 Blank_Line_Location);
584 -----------------------------------
585 -- Check_Exponentiation_Operator --
586 -----------------------------------
588 -- No spaces are required for the ** operator in GNAT style check mode
590 procedure Check_Exponentiation_Operator is
593 end Check_Exponentiation_Operator;
599 -- In check horizontal tab mode (-gnatyh), tab characters are not allowed
601 procedure Check_HT is
603 if Style_Check_Horizontal_Tabs then
604 Error_Msg_S -- CODEFIX
605 ("(style) horizontal tab not allowed");
609 -----------------------
610 -- Check_Indentation --
611 -----------------------
613 -- In check indentation mode (-gnatyn for n a digit), a new statement or
614 -- declaration is required to start in a column that is a multiple of the
615 -- indentation amount.
617 procedure Check_Indentation is
619 if Style_Check_Indentation /= 0 then
620 if Token_Ptr = First_Non_Blank_Location
621 and then Start_Column rem Style_Check_Indentation /= 0
623 Error_Msg_SC -- CODEFIX
624 ("(style) bad indentation");
627 end Check_Indentation;
629 ----------------------
630 -- Check_Left_Paren --
631 ----------------------
633 -- In tone check mode (-gnatyt), left paren must not be preceded by an
634 -- identifier character or digit (a separating space is required) and
635 -- may never be followed by a space.
637 procedure Check_Left_Paren is
639 if Style_Check_Tokens then
640 if Token_Ptr > Source_First (Current_Source_File)
641 and then Identifier_Char (Source (Token_Ptr - 1))
643 Error_Space_Required (Token_Ptr);
646 Check_No_Space_After;
648 end Check_Left_Paren;
650 ---------------------------
651 -- Check_Line_Max_Length --
652 ---------------------------
654 -- In check max line length mode (-gnatym), the line length must
655 -- not exceed the permitted maximum value.
657 procedure Check_Line_Max_Length (Len : Int) is
659 if Style_Check_Max_Line_Length then
660 if Len > Style_Max_Line_Length then
662 ("(style) this line is too long",
663 Current_Line_Start + Source_Ptr (Style_Max_Line_Length));
666 end Check_Line_Max_Length;
668 ---------------------------
669 -- Check_Line_Terminator --
670 ---------------------------
672 -- In check blanks at end mode (-gnatyb), lines may not end with a
675 -- In check form feeds mode (-gnatyf), the line terminator may not
676 -- be either of the characters FF or VT.
678 -- In check DOS line terminators node (-gnatyd), the line terminator
679 -- must be a single LF, without a following CR.
681 procedure Check_Line_Terminator (Len : Int) is
685 -- Length of line (adjusted down for blanks at end of line)
688 -- Reset count of blank lines if first line
690 if Get_Logical_Line_Number (Scan_Ptr) = 1 then
694 -- Check FF/VT terminators
696 if Style_Check_Form_Feeds then
697 if Source (Scan_Ptr) = ASCII.FF then
698 Error_Msg_S -- CODEFIX
699 ("(style) form feed not allowed");
700 elsif Source (Scan_Ptr) = ASCII.VT then
701 Error_Msg_S -- CODEFIX
702 ("(style) vertical tab not allowed");
706 -- Check DOS line terminator
708 if Style_Check_DOS_Line_Terminator then
710 -- Ignore EOF, since we only get called with an EOF if it is the last
711 -- character in the buffer (and was therefore not in the source file),
712 -- since the terminating EOF is added to stop the scan.
714 if Source (Scan_Ptr) = EOF then
717 -- Bad terminator if we don't have an LF
719 elsif Source (Scan_Ptr) /= LF then
720 Error_Msg_S ("(style) incorrect line terminator");
724 -- Remove trailing spaces
727 while L > 0 and then Is_White_Space (Source (S - 1)) loop
732 -- Issue message for blanks at end of line if option enabled
734 if Style_Check_Blanks_At_End and then L < Len then
736 ("(style) trailing spaces not permitted", S);
739 -- Deal with empty (blank) line
743 -- Increment blank line count
745 Blank_Lines := Blank_Lines + 1;
747 -- If first blank line, record location for later error message
749 if Blank_Lines = 1 then
750 Blank_Line_Location := Scan_Ptr;
753 -- Non-blank line, check for previous multiple blank lines
756 if Style_Check_Blank_Lines and then Blank_Lines > 1 then
758 ("(style) multiple blank lines", Blank_Line_Location);
761 -- And reset blank line count
765 end Check_Line_Terminator;
767 --------------------------
768 -- Check_No_Space_After --
769 --------------------------
771 procedure Check_No_Space_After is
775 if Is_White_Space (Source (Scan_Ptr)) then
777 -- Allow one or more spaces if followed by comment
781 if Source (S) = '-' and then Source (S + 1) = '-' then
784 elsif Is_White_Space (Source (S)) then
792 Error_Space_Not_Allowed (Scan_Ptr);
794 end Check_No_Space_After;
796 ---------------------------
797 -- Check_No_Space_Before --
798 ---------------------------
800 procedure Check_No_Space_Before is
802 if Token_Ptr > First_Non_Blank_Location
803 and then Source (Token_Ptr - 1) <= ' '
805 Error_Space_Not_Allowed (Token_Ptr - 1);
807 end Check_No_Space_Before;
809 -----------------------
810 -- Check_Pragma_Name --
811 -----------------------
813 -- In check pragma casing mode (-gnatyp), pragma names must be mixed
814 -- case, i.e. start with an upper case letter, and otherwise lower case,
815 -- except after an underline character.
817 procedure Check_Pragma_Name is
819 if Style_Check_Pragma_Casing then
820 if Determine_Token_Casing /= Mixed_Case then
821 Error_Msg_SC -- CODEFIX
822 ("(style) bad capitalization, mixed case required");
825 end Check_Pragma_Name;
827 -----------------------
828 -- Check_Right_Paren --
829 -----------------------
831 -- In check tokens mode (-gnatyt), right paren must not be immediately
832 -- followed by an identifier character, and must never be preceded by
833 -- a space unless it is the initial non-blank character on the line.
835 procedure Check_Right_Paren is
837 if Style_Check_Tokens then
838 if Identifier_Char (Source (Token_Ptr + 1)) then
839 Error_Space_Required (Token_Ptr + 1);
842 Check_No_Space_Before;
844 end Check_Right_Paren;
846 ---------------------
847 -- Check_Semicolon --
848 ---------------------
850 -- In check tokens mode (-gnatyt), semicolon does not permit a preceding
851 -- space and a following space is required.
853 procedure Check_Semicolon is
855 if Style_Check_Tokens then
856 Check_No_Space_Before;
858 if Source (Scan_Ptr) > ' ' then
859 Error_Space_Required (Scan_Ptr);
864 -------------------------------
865 -- Check_Separate_Stmt_Lines --
866 -------------------------------
868 procedure Check_Separate_Stmt_Lines is
870 if Style_Check_Separate_Stmt_Lines then
871 Check_Separate_Stmt_Lines_Cont;
873 end Check_Separate_Stmt_Lines;
875 ------------------------------------
876 -- Check_Separate_Stmt_Lines_Cont --
877 ------------------------------------
879 procedure Check_Separate_Stmt_Lines_Cont is
883 -- Skip past white space
886 while Is_White_Space (Source (S)) loop
890 -- Line terminator is OK
892 if Source (S) in Line_Terminator then
897 elsif Source (S) = '-' and then Source (S + 1) = '-' then
900 -- ABORT keyword is OK after THEN (THEN ABORT case)
902 elsif Token = Tok_Then
903 and then (Source (S + 0) = 'a' or else Source (S + 0) = 'A')
904 and then (Source (S + 1) = 'b' or else Source (S + 1) = 'B')
905 and then (Source (S + 2) = 'o' or else Source (S + 2) = 'O')
906 and then (Source (S + 3) = 'r' or else Source (S + 3) = 'R')
907 and then (Source (S + 4) = 't' or else Source (S + 4) = 'T')
908 and then (Source (S + 5) in Line_Terminator
909 or else Is_White_Space (Source (S + 5)))
913 -- PRAGMA keyword is OK after ELSE
915 elsif Token = Tok_Else
916 and then (Source (S + 0) = 'p' or else Source (S + 0) = 'P')
917 and then (Source (S + 1) = 'r' or else Source (S + 1) = 'R')
918 and then (Source (S + 2) = 'a' or else Source (S + 2) = 'A')
919 and then (Source (S + 3) = 'g' or else Source (S + 3) = 'G')
920 and then (Source (S + 4) = 'm' or else Source (S + 4) = 'M')
921 and then (Source (S + 5) = 'a' or else Source (S + 5) = 'A')
922 and then (Source (S + 6) in Line_Terminator
923 or else Is_White_Space (Source (S + 6)))
927 -- Otherwise we have the style violation we are looking for
930 if Token = Tok_Then then
932 ("(style) no statements may follow THEN on same line", S);
935 ("(style) no statements may follow ELSE on same line", S);
938 end Check_Separate_Stmt_Lines_Cont;
944 -- In check if then layout mode (-gnatyi), we expect a THEN keyword
945 -- to appear either on the same line as the IF, or on a separate line
946 -- after multiple conditions. In any case, it may not appear on the
947 -- line immediately following the line with the IF.
949 procedure Check_Then (If_Loc : Source_Ptr) is
951 if Style_Check_If_Then_Layout then
952 if Get_Physical_Line_Number (Token_Ptr) =
953 Get_Physical_Line_Number (If_Loc) + 1
955 Error_Msg_SC ("(style) misplaced THEN");
960 -------------------------------
961 -- Check_Unary_Plus_Or_Minus --
962 -------------------------------
964 -- In check token mode (-gnatyt), unary plus or minus must not be
965 -- followed by a space.
967 procedure Check_Unary_Plus_Or_Minus is
969 if Style_Check_Tokens then
970 Check_No_Space_After;
972 end Check_Unary_Plus_Or_Minus;
974 ------------------------
975 -- Check_Vertical_Bar --
976 ------------------------
978 -- In check token mode (-gnatyt), vertical bar must be surrounded by spaces
980 procedure Check_Vertical_Bar is
982 if Style_Check_Tokens then
983 Require_Preceding_Space;
984 Require_Following_Space;
986 end Check_Vertical_Bar;
988 -----------------------
989 -- Check_Xtra_Parens --
990 -----------------------
992 procedure Check_Xtra_Parens (Loc : Source_Ptr) is
994 if Style_Check_Xtra_Parens then
996 ("redundant parentheses?", Loc);
998 end Check_Xtra_Parens;
1000 ----------------------------
1001 -- Determine_Token_Casing --
1002 ----------------------------
1004 function Determine_Token_Casing return Casing_Type is
1006 return Determine_Casing (Source (Token_Ptr .. Scan_Ptr - 1));
1007 end Determine_Token_Casing;
1009 -----------------------------
1010 -- Error_Space_Not_Allowed --
1011 -----------------------------
1013 procedure Error_Space_Not_Allowed (S : Source_Ptr) is
1015 Error_Msg -- CODEFIX
1016 ("(style) space not allowed", S);
1017 end Error_Space_Not_Allowed;
1019 --------------------------
1020 -- Error_Space_Required --
1021 --------------------------
1023 procedure Error_Space_Required (S : Source_Ptr) is
1025 Error_Msg -- CODEFIX
1026 ("(style) space required", S);
1027 end Error_Space_Required;
1029 --------------------
1030 -- Is_White_Space --
1031 --------------------
1033 function Is_White_Space (C : Character) return Boolean is
1035 return C = ' ' or else C = HT;
1042 function Mode_In_Check return Boolean is
1044 return Style_Check and Style_Check_Mode_In;
1051 -- In check end/exit labels mode (-gnatye), always require the name of
1052 -- a subprogram or package to be present on the END, so this is an error.
1054 procedure No_End_Name (Name : Node_Id) is
1056 if Style_Check_End_Labels then
1057 Error_Msg_Node_1 := Name;
1058 Error_Msg_SP -- CODEFIX
1059 ("(style) `END &` required");
1067 -- In check end/exit labels mode (-gnatye), always require the name of
1068 -- the loop to be present on the EXIT when exiting a named loop.
1070 procedure No_Exit_Name (Name : Node_Id) is
1072 if Style_Check_End_Labels then
1073 Error_Msg_Node_1 := Name;
1074 Error_Msg_SP -- CODEFIX
1075 ("(style) `EXIT &` required");
1079 ----------------------------
1080 -- Non_Lower_Case_Keyword --
1081 ----------------------------
1083 -- In check casing mode (-gnatyk), reserved keywords must be spelled
1084 -- in all lower case (excluding keywords range, access, delta and digits
1085 -- used as attribute designators).
1087 procedure Non_Lower_Case_Keyword is
1089 if Style_Check_Keyword_Casing then
1090 Error_Msg_SC -- CODEFIX
1091 ("(style) reserved words must be all lower case");
1093 end Non_Lower_Case_Keyword;
1095 -----------------------------
1096 -- Require_Following_Space --
1097 -----------------------------
1099 procedure Require_Following_Space is
1101 if Source (Scan_Ptr) > ' ' then
1102 Error_Space_Required (Scan_Ptr);
1104 end Require_Following_Space;
1106 -----------------------------
1107 -- Require_Preceding_Space --
1108 -----------------------------
1110 procedure Require_Preceding_Space is
1112 if Token_Ptr > Source_First (Current_Source_File)
1113 and then Source (Token_Ptr - 1) > ' '
1115 Error_Space_Required (Token_Ptr);
1117 end Require_Preceding_Space;