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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- S I N F O . C N --
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6 -- --
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7 -- S p e c --
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8 -- --
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145
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9 -- Copyright (C) 1992-2019, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- This child package of Sinfo contains some routines that permit in place
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27 -- alteration of existing tree nodes by changing the value in the Nkind
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28 -- field. Since Nkind functions logically in a manner similar to a variant
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29 -- record discriminant part, such alterations cannot be permitted in a
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30 -- general manner, but in some specific cases, the fields of related nodes
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31 -- have been deliberately laid out in a manner that permits such alteration.
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32
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33 package Sinfo.CN is
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34
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35 procedure Change_Identifier_To_Defining_Identifier (N : in out Node_Id);
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36 -- N must refer to a node of type N_Identifier. This node is modified to
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37 -- be of type N_Defining_Identifier. The scanner always returns identifiers
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38 -- as N_Identifier. The parser then uses this routine to change the node
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39 -- to be a defining identifier where the context demands it. This routine
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40 -- also allocates the necessary extension node. Note that this procedure
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41 -- may (but is not required to) change the Id of the node in question.
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42
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43 procedure Change_Character_Literal_To_Defining_Character_Literal
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44 (N : in out Node_Id);
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45 -- Similar processing for a character literal
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46
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47 procedure Change_Operator_Symbol_To_Defining_Operator_Symbol
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48 (N : in out Node_Id);
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49 -- Similar processing for an operator symbol
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50
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51 procedure Change_Conversion_To_Unchecked (N : Node_Id);
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52 -- Change checked conversion node to unchecked conversion node, clearing
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53 -- irrelevant check flags (other fields in the two nodes are identical)
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54
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55 procedure Change_Operator_Symbol_To_String_Literal (N : Node_Id);
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56 -- The scanner returns any string that looks like an operator symbol as
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57 -- a N_Operator_Symbol node. The parser then uses this procedure to change
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58 -- the node to a normal N_String_Literal node if the context is not one
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59 -- in which an operator symbol is required. There are some cases where the
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60 -- parser cannot tell, in which case this transformation happens later on.
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61
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62 procedure Change_Selected_Component_To_Expanded_Name (N : Node_Id);
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63 -- The parser always generates Selected_Component nodes. The semantics
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64 -- modifies these to Expanded_Name nodes where appropriate. Note that
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65 -- on return the Chars field is set to a copy of the contents of the
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66 -- Chars field of the Selector_Name field.
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67
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68 procedure Change_Name_To_Procedure_Call_Statement (N : Node_Id);
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69 -- Some statements (procedure call statements) are in the form of a name
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70 -- and are parsed as such. This routine takes the scanned name as input
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71 -- and returns the corresponding N_Procedure_Call_Statement.
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72
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73 end Sinfo.CN;
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