diff options
Diffstat (limited to 'gcc/ada/sprint.adb')
| -rw-r--r-- | gcc/ada/sprint.adb | 383 |
1 files changed, 258 insertions, 125 deletions
diff --git a/gcc/ada/sprint.adb b/gcc/ada/sprint.adb index e7c1a6a0de9..ab2b585da58 100644 --- a/gcc/ada/sprint.adb +++ b/gcc/ada/sprint.adb @@ -6,9 +6,9 @@ -- -- -- B o d y -- -- -- --- $Revision: 1.1 $ +-- $Revision$ -- -- --- Copyright (C) 1992-2001, Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2002, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- @@ -28,6 +28,7 @@ with Atree; use Atree; with Casing; use Casing; +with Csets; use Csets; with Debug; use Debug; with Einfo; use Einfo; with Lib; use Lib; @@ -38,7 +39,7 @@ with Output; use Output; with Rtsfind; use Rtsfind; with Sinfo; use Sinfo; with Sinput; use Sinput; -with Sinput.L; use Sinput.L; +with Sinput.D; use Sinput.D; with Snames; use Snames; with Stand; use Stand; with Stringt; use Stringt; @@ -81,6 +82,55 @@ package body Sprint is -- Keep track of freeze indent level (controls blank lines before -- procedures within expression freeze actions) + ------------------------------- + -- Operator Precedence Table -- + ------------------------------- + + -- This table is used to decide whether a subexpression needs to be + -- parenthesized. The rule is that if an operand of an operator (which + -- for this purpose includes AND THEN and OR ELSE) is itself an operator + -- with a lower precedence than the operator (or equal precedence if + -- appearing as the right operand), then parentheses are required. + + Op_Prec : array (N_Subexpr) of Short_Short_Integer := + (N_Op_And => 1, + N_Op_Or => 1, + N_Op_Xor => 1, + N_And_Then => 1, + N_Or_Else => 1, + + N_In => 2, + N_Not_In => 2, + N_Op_Eq => 2, + N_Op_Ge => 2, + N_Op_Gt => 2, + N_Op_Le => 2, + N_Op_Lt => 2, + N_Op_Ne => 2, + + N_Op_Add => 3, + N_Op_Concat => 3, + N_Op_Subtract => 3, + N_Op_Plus => 3, + N_Op_Minus => 3, + + N_Op_Divide => 4, + N_Op_Mod => 4, + N_Op_Rem => 4, + N_Op_Multiply => 4, + + N_Op_Expon => 5, + N_Op_Abs => 5, + N_Op_Not => 5, + + others => 6); + + procedure Sprint_Left_Opnd (N : Node_Id); + -- Print left operand of operator, parenthesizing if necessary + + procedure Sprint_Right_Opnd (N : Node_Id); + -- Print right operand of operator, parenthesizing if necessary + ----------------------- -- Local Subprograms -- ----------------------- @@ -102,8 +152,9 @@ package body Sprint is procedure Indent_End; -- Decrease indentation level - procedure Print_Eol; - -- Terminate current line in line buffer + procedure Print_Debug_Line (S : String); + -- Used to print output lines in Debug_Generated_Code mode (this is used + -- as the argument for a call to Set_Special_Output in package Output). procedure Process_TFAI_RR_Flags (Nod : Node_Id); -- Given a divide, multiplication or division node, check the flags @@ -133,6 +184,9 @@ package body Sprint is -- Like Write_Char, except that if C is non-blank, Set_Debug_Sloc is -- called to ensure that the current node has a proper Sloc set. + procedure Write_Condition_And_Reason (Node : Node_Id); + -- Write Condition and Reason codes of Raise_xxx_Error node + procedure Write_Discr_Specs (N : Node_Id); -- Output discriminant specification for node, which is any of the type -- declarations that can have discriminants. @@ -269,50 +323,37 @@ package body Sprint is end Indent_End; -------- - -- PG -- + -- pg -- -------- - procedure PG (Node : Node_Id) is + procedure pg (Node : Node_Id) is begin Dump_Generated_Only := True; Dump_Original_Only := False; Sprint_Node (Node); - Print_Eol; - end PG; + Write_Eol; + end pg; -------- - -- PO -- + -- po -- -------- - procedure PO (Node : Node_Id) is + procedure po (Node : Node_Id) is begin Dump_Generated_Only := False; Dump_Original_Only := True; Sprint_Node (Node); - Print_Eol; - end PO; + Write_Eol; + end po; - --------------- - -- Print_Eol -- - --------------- + ---------------------- + -- Print_Debug_Line -- + ---------------------- - procedure Print_Eol is + procedure Print_Debug_Line (S : String) is begin - -- If we are writing a debug source file, then grab it from the - -- Output buffer, and reset the column counter (the routines in - -- Output never actually write any output for us in this mode, - -- they just build line images in Buffer). - - if Debug_Generated_Code then - Write_Debug_Line (Buffer (1 .. Natural (Column) - 1), Debug_Sloc); - Column := 1; - - -- In normal mode, we call Write_Eol to write the line normally - - else - Write_Eol; - end if; - end Print_Eol; + Write_Debug_Line (S, Debug_Sloc); + end Print_Debug_Line; --------------------------- -- Process_TFAI_RR_Flags -- @@ -330,16 +371,16 @@ package body Sprint is end Process_TFAI_RR_Flags; -------- - -- PS -- + -- ps -- -------- - procedure PS (Node : Node_Id) is + procedure ps (Node : Node_Id) is begin Dump_Generated_Only := False; Dump_Original_Only := False; Sprint_Node (Node); - Print_Eol; - end PS; + Write_Eol; + end ps; -------------------- -- Set_Debug_Sloc -- @@ -366,13 +407,13 @@ package body Sprint is Col : constant Int := Column; begin - Print_Eol; + Write_Eol; while Col > Column loop Write_Char ('-'); end loop; - Print_Eol; + Write_Eol; end Underline; -- Start of processing for Tree_Dump. @@ -391,13 +432,13 @@ package body Sprint is if Debug_Flag_Z then Debug_Flag_Z := False; - Print_Eol; - Print_Eol; + Write_Eol; + Write_Eol; Write_Str ("Source recreated from tree of Standard (spec)"); Underline; Sprint_Node (Standard_Package_Node); - Print_Eol; - Print_Eol; + Write_Eol; + Write_Eol; end if; if Debug_Flag_S or Dump_Generated_Only or Dump_Original_Only then @@ -418,10 +459,12 @@ package body Sprint is -- If we are generating debug files, setup to write them if Debug_Generated_Code then + Set_Special_Output (Print_Debug_Line'Access); Create_Debug_Source (Source_Index (U), Debug_Sloc); Sprint_Node (Cunit (U)); - Print_Eol; + Write_Eol; Close_Debug_Source; + Set_Special_Output (null); -- Normal output to standard output file @@ -495,6 +538,26 @@ package body Sprint is Indent_End; end Sprint_Indented_List; + --------------------- + -- Sprint_Left_Opnd -- + --------------------- + + procedure Sprint_Left_Opnd (N : Node_Id) is + Opnd : constant Node_Id := Left_Opnd (N); + + begin + if Paren_Count (Opnd) /= 0 + or else Op_Prec (Nkind (Opnd)) >= Op_Prec (Nkind (N)) + then + Sprint_Node (Opnd); + + else + Write_Char ('('); + Sprint_Node (Opnd); + Write_Char (')'); + end if; + end Sprint_Left_Opnd; + ----------------- -- Sprint_Node -- ----------------- @@ -722,9 +785,9 @@ package body Sprint is end if; when N_And_Then => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Str_Sloc (" and then "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_At_Clause => Write_Indent_Str_Sloc ("for "); @@ -1466,9 +1529,9 @@ package body Sprint is end if; when N_In => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Str_Sloc (" in "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Incomplete_Type_Declaration => Write_Indent_Str_Sloc ("type "); @@ -1565,9 +1628,9 @@ package body Sprint is Sprint_Node (Expression (Node)); when N_Not_In => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Str_Sloc (" not in "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Null => Write_Str_With_Col_Check_Sloc ("null"); @@ -1648,108 +1711,108 @@ package body Sprint is when N_Op_Abs => Write_Operator (Node, "abs "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Add => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " + "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_And => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " and "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Concat => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " & "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Divide => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Char (' '); Process_TFAI_RR_Flags (Node); Write_Operator (Node, "/ "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Eq => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " = "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Expon => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " ** "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Ge => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " >= "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Gt => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " > "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Le => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " <= "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Lt => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " < "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Minus => Write_Operator (Node, "-"); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Mod => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); if Treat_Fixed_As_Integer (Node) then Write_Str (" #"); end if; Write_Operator (Node, " mod "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Multiply => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Char (' '); Process_TFAI_RR_Flags (Node); Write_Operator (Node, "* "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Ne => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " /= "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Not => Write_Operator (Node, "not "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Or => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " or "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Plus => Write_Operator (Node, "+"); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Rem => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); if Treat_Fixed_As_Integer (Node) then Write_Str (" #"); end if; Write_Operator (Node, " rem "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Shift => Set_Debug_Sloc; @@ -1762,14 +1825,14 @@ package body Sprint is Write_Char (')'); when N_Op_Subtract => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " - "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Op_Xor => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Operator (Node, " xor "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Operator_Symbol => Write_Name_With_Col_Check_Sloc (Chars (Node)); @@ -1780,9 +1843,9 @@ package body Sprint is Sprint_Opt_Node (Real_Range_Specification (Node)); when N_Or_Else => - Sprint_Node (Left_Opnd (Node)); + Sprint_Left_Opnd (Node); Write_Str_Sloc (" or else "); - Sprint_Node (Right_Opnd (Node)); + Sprint_Right_Opnd (Node); when N_Others_Choice => if All_Others (Node) then @@ -1991,7 +2054,20 @@ package body Sprint is when N_Qualified_Expression => Sprint_Node (Subtype_Mark (Node)); Write_Char_Sloc ('''); - Sprint_Node (Expression (Node)); + + -- Print expression, make sure we have at least one level of + -- parentheses around the expression. For cases of qualified + -- expressions in the source, this is always the case, but + -- for generated qualifications, there may be no explicit + -- parentheses present. + + if Paren_Count (Expression (Node)) /= 0 then + Sprint_Node (Expression (Node)); + else + Write_Char ('('); + Sprint_Node (Expression (Node)); + Write_Char (')'); + end if; when N_Raise_Constraint_Error => @@ -2006,35 +2082,37 @@ package body Sprint is end if; Write_Str_With_Col_Check_Sloc ("[constraint_error"); - - if Present (Condition (Node)) then - Write_Str_With_Col_Check (" when "); - Sprint_Node (Condition (Node)); - end if; - - Write_Char (']'); + Write_Condition_And_Reason (Node); when N_Raise_Program_Error => - Write_Indent; - Write_Str_With_Col_Check_Sloc ("[program_error"); - if Present (Condition (Node)) then - Write_Str_With_Col_Check (" when "); - Sprint_Node (Condition (Node)); + -- This node can be used either as a subexpression or as a + -- statement form. The following test is a reasonably reliable + -- way to distinguish the two cases. + + if Is_List_Member (Node) + and then Nkind (Parent (Node)) not in N_Subexpr + then + Write_Indent; end if; - Write_Char (']'); + Write_Str_With_Col_Check_Sloc ("[program_error"); + Write_Condition_And_Reason (Node); when N_Raise_Storage_Error => - Write_Indent; - Write_Str_With_Col_Check_Sloc ("[storage_error"); - if Present (Condition (Node)) then - Write_Str_With_Col_Check (" when "); - Sprint_Node (Condition (Node)); + -- This node can be used either as a subexpression or as a + -- statement form. The following test is a reasonably reliable + -- way to distinguish the two cases. + + if Is_List_Member (Node) + and then Nkind (Parent (Node)) not in N_Subexpr + then + Write_Indent; end if; - Write_Char (']'); + Write_Str_With_Col_Check_Sloc ("[storage_error"); + Write_Condition_And_Reason (Node); when N_Raise_Statement => Write_Indent_Str_Sloc ("raise "); @@ -2248,7 +2326,7 @@ package body Sprint is Write_Indent_Str_Sloc ("separate ("); Sprint_Node (Name (Node)); Write_Char (')'); - Print_Eol; + Write_Eol; Sprint_Node (Proper_Body (Node)); when N_Task_Body => @@ -2381,7 +2459,7 @@ package body Sprint is when N_Unused_At_Start | N_Unused_At_End => Write_Indent_Str ("***** Error, unused node encountered *****"); - Print_Eol; + Write_Eol; when N_Use_Package_Clause => Write_Indent_Str_Sloc ("use "); @@ -2573,6 +2651,26 @@ package body Sprint is end if; end Sprint_Paren_Comma_List; + ---------------------- + -- Sprint_Right_Opnd -- + ---------------------- + + procedure Sprint_Right_Opnd (N : Node_Id) is + Opnd : constant Node_Id := Right_Opnd (N); + + begin + if Paren_Count (Opnd) /= 0 + or else Op_Prec (Nkind (Opnd)) > Op_Prec (Nkind (N)) + then + Sprint_Node (Opnd); + + else + Write_Char ('('); + Sprint_Node (Opnd); + Write_Char (')'); + end if; + end Sprint_Right_Opnd; + --------------------- -- Write_Char_Sloc -- --------------------- @@ -2586,6 +2684,34 @@ package body Sprint is Write_Char (C); end Write_Char_Sloc; + -------------------------------- + -- Write_Condition_And_Reason -- + -------------------------------- + + procedure Write_Condition_And_Reason (Node : Node_Id) is + Image : constant String := RT_Exception_Code'Image + (RT_Exception_Code'Val + (UI_To_Int (Reason (Node)))); + + begin + if Present (Condition (Node)) then + Write_Str_With_Col_Check (" when "); + Sprint_Node (Condition (Node)); + end if; + + Write_Str (" """); + + for J in 4 .. Image'Last loop + if Image (J) = '_' then + Write_Char (' '); + else + Write_Char (Fold_Lower (Image (J))); + end if; + end loop; + + Write_Str ("""]"); + end Write_Condition_And_Reason; + ------------------------ -- Write_Discr_Specs -- ------------------------ @@ -2756,7 +2882,8 @@ package body Sprint is if Indent_Annull_Flag then Indent_Annull_Flag := False; else - Print_Eol; + Write_Eol; + for J in 1 .. Indent loop Write_Char (' '); end loop; @@ -2909,25 +3036,31 @@ package body Sprint is T : Natural := S'Last; begin - if S (F) = ' ' then - Write_Char (' '); - F := F + 1; - end if; + -- If no overflow check, just write string out, and we are done - if S (T) = ' ' then - T := T - 1; - end if; + if not Do_Overflow_Check (N) then + Write_Str_Sloc (S); + + -- If overflow check, we want to surround the operator with curly + -- brackets, but not include spaces within the brackets. + + else + if S (F) = ' ' then + Write_Char (' '); + F := F + 1; + end if; + + if S (T) = ' ' then + T := T - 1; + end if; - if Do_Overflow_Check (N) then Write_Char ('{'); Write_Str_Sloc (S (F .. T)); Write_Char ('}'); - else - Write_Str_Sloc (S); - end if; - if S (S'Last) = ' ' then - Write_Char (' '); + if S (S'Last) = ' ' then + Write_Char (' '); + end if; end if; end Write_Operator; |
