/* Definitions for expressions stored in reversed prefix form, for GDB.
- Copyright (C) 1986 Free Software Foundation, Inc.
+ Copyright 1986, 1989, 1992 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#if !defined (EXPRESSION_H)
+#define EXPRESSION_H 1
+
+#ifdef __STDC__
+struct block; /* Forward declaration for prototypes */
+#endif
/* Definitions for saved C expressions. */
enum exp_opcode
{
+ /* Used when it's necessary to pass an opcode which will be ignored,
+ or to catch uninitialized values. */
+ OP_NULL,
+
/* BINOP_... operate on two values computed by following subexpressions,
replacing them by one result value. They take no immediate arguments. */
BINOP_ADD, /* + */
BINOP_MUL, /* * */
BINOP_DIV, /* / */
BINOP_REM, /* % */
+ BINOP_MOD, /* mod (Knuth 1.2.4) */
BINOP_LSH, /* << */
BINOP_RSH, /* >> */
- BINOP_AND, /* && */
- BINOP_OR, /* || */
- BINOP_LOGAND, /* & */
- BINOP_LOGIOR, /* | */
- BINOP_LOGXOR, /* ^ */
+ BINOP_LOGICAL_AND, /* && */
+ BINOP_LOGICAL_OR, /* || */
+ BINOP_BITWISE_AND, /* & */
+ BINOP_BITWISE_IOR, /* | */
+ BINOP_BITWISE_XOR, /* ^ */
BINOP_EQUAL, /* == */
BINOP_NOTEQUAL, /* != */
BINOP_LESS, /* < */
STRUCTOP_MPTR,
/* end of C++. */
- BINOP_END,
+ /* For Modula-2 integer division DIV */
+ BINOP_INTDIV,
BINOP_ASSIGN_MODIFY, /* +=, -=, *=, and so on.
The following exp_element is another opcode,
Then comes another BINOP_ASSIGN_MODIFY,
making three exp_elements in total. */
+ /* Modula-2 standard (binary) procedures*/
+ BINOP_VAL,
+ BINOP_INCL,
+ BINOP_EXCL,
+
+ /* This must be the highest BINOP_ value, for expprint.c. */
+ BINOP_END,
+
/* Operates on three values computed by following subexpressions. */
TERNOP_COND, /* ?: */
+/* Multidimensional subscript operator, such as Modula-2 x[a,b,...].
+ The dimensionality is encoded in the operator, like the number of
+ function arguments in OP_FUNCALL, I.E. <OP><dimension><OP>.
+ The value of the first following subexpression is subscripted
+ by each of the next following subexpressions, one per dimension. */
+
+ MULTI_SUBSCRIPT,
+
/* The OP_... series take immediate following arguments.
After the arguments come another OP_... (the same one)
so that the grouping can be recognized from the end. */
/* UNOP_... operate on one value from a following subexpression
and replace it with a result. They take no immediate arguments. */
UNOP_NEG, /* Unary - */
- UNOP_ZEROP, /* Unary ! */
- UNOP_LOGNOT, /* Unary ~ */
+ UNOP_LOGICAL_NOT, /* Unary ! */
+ UNOP_COMPLEMENT, /* Unary ~ */
UNOP_IND, /* Unary * */
UNOP_ADDR, /* Unary & */
UNOP_PREINCREMENT, /* ++ before an expression */
UNOP_POSTDECREMENT, /* -- after an expression */
UNOP_SIZEOF, /* Unary sizeof (followed by expression) */
+ UNOP_PLUS, /* Unary plus */
+
+ UNOP_CAP, /* Modula-2 standard (unary) procedures */
+ UNOP_CHR,
+ UNOP_ORD,
+ UNOP_ABS,
+ UNOP_FLOAT,
+ UNOP_HIGH,
+ UNOP_MAX,
+ UNOP_MIN,
+ UNOP_ODD,
+ UNOP_TRUNC,
+
+ OP_BOOL, /* Modula-2 builtin BOOLEAN type */
+ OP_M2_STRING, /* Modula-2 string constants */
+
/* STRUCTOP_... operate on a value from a following subexpression
by extracting a structure component specified by a string
that appears in the following exp_elements (as many as needed).
a string, which, of course, is variable length. */
OP_SCOPE,
+ /* OP_TYPE is for parsing types, and used with the "ptype" command
+ so we can look up types that are qualified by scope, either with
+ the GDB "::" operator, or the Modula-2 '.' operator. */
+ OP_TYPE
};
union exp_element
{
enum exp_opcode opcode;
struct symbol *symbol;
- long longconst;
+ LONGEST longconst;
double doubleconst;
char string;
struct type *type;
struct expression
{
+ const struct language_defn *language_defn; /* language it was entered in */
int nelts;
union exp_element elts[1];
};
-struct expression *parse_c_expression ();
-struct expression *parse_c_1 ();
+/* From parse.c */
+
+extern struct expression *
+parse_expression PARAMS ((char *));
+
+extern struct expression *
+parse_exp_1 PARAMS ((char **, struct block *, int));
+
+/* The innermost context required by the stack and register variables
+ we've encountered so far. To use this, set it to NULL, then call
+ parse_<whatever>, then look at it. */
+extern struct block *innermost_block;
+
+/* From expprint.c */
+
+extern void
+print_expression PARAMS ((struct expression *, FILE *));
+
+extern char *
+op_string PARAMS ((enum exp_opcode));
+
+/* To enable dumping of all parsed expressions in a human readable
+ form, define DEBUG_EXPRESSIONS. This is a compile time constant
+ at the moment, since it's not clear that this feature is important
+ enough to include by default. */
+
+#ifdef DEBUG_EXPRESSIONS
+extern void
+dump_expression PARAMS ((struct expression *, FILE *, char *));
+#define DUMP_EXPRESSION(exp,file,note) dump_expression ((exp), (file), (note))
+#else
+#define DUMP_EXPRESSION(exp,file,note) /* Null expansion */
+#endif /* DEBUG_EXPRESSIONS */
+
+#endif /* !defined (EXPRESSION_H) */
projects / binutils-gdb.git / blobdiff