Initial creation of sourceware repository

1 files changed, 0 insertions, 1094 deletions

diff --git a/gdb/m2-exp.y b/gdb/m2-exp.y
deleted file mode 100644
index 507e5bc..0000000
--- a/gdb/m2-exp.y
+++ /dev/null
@@ -1,1094 +0,0 @@
-/* YACC grammar for Modula-2 expressions, for GDB.
-   Copyright (C) 1986, 1989, 1990, 1991, 1993, 1994, 1995
-   Free Software Foundation, Inc.
-   Generated from expread.y (now c-exp.y) and contributed by the Department
-   of Computer Science at the State University of New York at Buffalo, 1991.
-
-This file is part of GDB.
-
-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.
-
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
-
-/* Parse a Modula-2 expression from text in a string,
-   and return the result as a  struct expression  pointer.
-   That structure contains arithmetic operations in reverse polish,
-   with constants represented by operations that are followed by special data.
-   See expression.h for the details of the format.
-   What is important here is that it can be built up sequentially
-   during the process of parsing; the lower levels of the tree always
-   come first in the result.
-
-   Note that malloc's and realloc's in this file are transformed to
-   xmalloc and xrealloc respectively by the same sed command in the
-   makefile that remaps any other malloc/realloc inserted by the parser
-   generator.  Doing this with #defines and trying to control the interaction
-   with include files (<malloc.h> and <stdlib.h> for example) just became
-   too messy, particularly when such includes can be inserted at random
-   times by the parser generator. */
-   
-%{
-
-#include "defs.h"
-#include "gdb_string.h"
-#include "expression.h"
-#include "language.h"
-#include "value.h"
-#include "parser-defs.h"
-#include "m2-lang.h"
-#include "bfd.h" /* Required by objfiles.h.  */
-#include "symfile.h" /* Required by objfiles.h.  */
-#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
-
-/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
-   as well as gratuitiously global symbol names, so we can have multiple
-   yacc generated parsers in gdb.  Note that these are only the variables
-   produced by yacc.  If other parser generators (bison, byacc, etc) produce
-   additional global names that conflict at link time, then those parser
-   generators need to be fixed instead of adding those names to this list. */
-
-#define	yymaxdepth m2_maxdepth
-#define	yyparse	m2_parse
-#define	yylex	m2_lex
-#define	yyerror	m2_error
-#define	yylval	m2_lval
-#define	yychar	m2_char
-#define	yydebug	m2_debug
-#define	yypact	m2_pact
-#define	yyr1	m2_r1
-#define	yyr2	m2_r2
-#define	yydef	m2_def
-#define	yychk	m2_chk
-#define	yypgo	m2_pgo
-#define	yyact	m2_act
-#define	yyexca	m2_exca
-#define	yyerrflag m2_errflag
-#define	yynerrs	m2_nerrs
-#define	yyps	m2_ps
-#define	yypv	m2_pv
-#define	yys	m2_s
-#define	yy_yys	m2_yys
-#define	yystate	m2_state
-#define	yytmp	m2_tmp
-#define	yyv	m2_v
-#define	yy_yyv	m2_yyv
-#define	yyval	m2_val
-#define	yylloc	m2_lloc
-#define	yyreds	m2_reds		/* With YYDEBUG defined */
-#define	yytoks	m2_toks		/* With YYDEBUG defined */
-#define yylhs	m2_yylhs
-#define yylen	m2_yylen
-#define yydefred m2_yydefred
-#define yydgoto	m2_yydgoto
-#define yysindex m2_yysindex
-#define yyrindex m2_yyrindex
-#define yygindex m2_yygindex
-#define yytable	 m2_yytable
-#define yycheck	 m2_yycheck
-
-#ifndef YYDEBUG
-#define	YYDEBUG	0		/* Default to no yydebug support */
-#endif
-
-int
-yyparse PARAMS ((void));
-
-static int
-yylex PARAMS ((void));
-
-void
-yyerror PARAMS ((char *));
-
-#if 0
-static char *
-make_qualname PARAMS ((char *, char *));
-#endif
-
-static int
-parse_number PARAMS ((int));
-
-/* The sign of the number being parsed. */
-static int number_sign = 1;
-
-/* The block that the module specified by the qualifer on an identifer is
-   contained in, */
-#if 0
-static struct block *modblock=0;
-#endif
-
-%}
-
-/* Although the yacc "value" of an expression is not used,
-   since the result is stored in the structure being created,
-   other node types do have values.  */
-
-%union
-  {
-    LONGEST lval;
-    ULONGEST ulval;
-    DOUBLEST dval;
-    struct symbol *sym;
-    struct type *tval;
-    struct stoken sval;
-    int voidval;
-    struct block *bval;
-    enum exp_opcode opcode;
-    struct internalvar *ivar;
-
-    struct type **tvec;
-    int *ivec;
-  }
-
-%type <voidval> exp type_exp start set
-%type <voidval> variable
-%type <tval> type
-%type <bval> block 
-%type <sym> fblock 
-
-%token <lval> INT HEX ERROR
-%token <ulval> UINT M2_TRUE M2_FALSE CHAR
-%token <dval> FLOAT
-
-/* Both NAME and TYPENAME tokens represent symbols in the input,
-   and both convey their data as strings.
-   But a TYPENAME is a string that happens to be defined as a typedef
-   or builtin type name (such as int or char)
-   and a NAME is any other symbol.
-
-   Contexts where this distinction is not important can use the
-   nonterminal "name", which matches either NAME or TYPENAME.  */
-
-%token <sval> STRING
-%token <sval> NAME BLOCKNAME IDENT VARNAME
-%token <sval> TYPENAME
-
-%token SIZE CAP ORD HIGH ABS MIN_FUNC MAX_FUNC FLOAT_FUNC VAL CHR ODD TRUNC
-%token INC DEC INCL EXCL
-
-/* The GDB scope operator */
-%token COLONCOLON
-
-%token <voidval> INTERNAL_VAR
-
-/* M2 tokens */
-%left ','
-%left ABOVE_COMMA
-%nonassoc ASSIGN
-%left '<' '>' LEQ GEQ '=' NOTEQUAL '#' IN
-%left OROR
-%left LOGICAL_AND '&'
-%left '@'
-%left '+' '-'
-%left '*' '/' DIV MOD
-%right UNARY
-%right '^' DOT '[' '('
-%right NOT '~'
-%left COLONCOLON QID
-/* This is not an actual token ; it is used for precedence. 
-%right QID
-*/
-
-
-%%
-
-start   :	exp
-	|	type_exp
-	;
-
-type_exp:	type
-		{ write_exp_elt_opcode(OP_TYPE);
-		  write_exp_elt_type($1);
-		  write_exp_elt_opcode(OP_TYPE);
-		}
-	;
-
-/* Expressions */
-
-exp     :       exp '^'   %prec UNARY
-                        { write_exp_elt_opcode (UNOP_IND); }
-
-exp	:	'-'
-			{ number_sign = -1; }
-		exp    %prec UNARY
-			{ number_sign = 1;
-			  write_exp_elt_opcode (UNOP_NEG); }
-	;
-
-exp	:	'+' exp    %prec UNARY
-		{ write_exp_elt_opcode(UNOP_PLUS); }
-	;
-
-exp	:	not_exp exp %prec UNARY
-			{ write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
-	;
-
-not_exp	:	NOT
-	|	'~'
-	;
-
-exp	:	CAP '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_CAP); }
-	;
-
-exp	:	ORD '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_ORD); }
-	;
-
-exp	:	ABS '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_ABS); }
-	;
-
-exp	: 	HIGH '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_HIGH); }
-	;
-
-exp 	:	MIN_FUNC '(' type ')'
-			{ write_exp_elt_opcode (UNOP_MIN);
-			  write_exp_elt_type ($3);
-			  write_exp_elt_opcode (UNOP_MIN); }
-	;
-
-exp	: 	MAX_FUNC '(' type ')'
-			{ write_exp_elt_opcode (UNOP_MAX);
-			  write_exp_elt_type ($3);
-			  write_exp_elt_opcode (UNOP_MIN); }
-	;
-
-exp	:	FLOAT_FUNC '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_FLOAT); }
-	;
-
-exp	:	VAL '(' type ',' exp ')'
-			{ write_exp_elt_opcode (BINOP_VAL);
-			  write_exp_elt_type ($3);
-			  write_exp_elt_opcode (BINOP_VAL); }
-	;
-
-exp	:	CHR '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_CHR); }
-	;
-
-exp	:	ODD '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_ODD); }
-	;
-
-exp	:	TRUNC '(' exp ')'
-			{ write_exp_elt_opcode (UNOP_TRUNC); }
-	;
-
-exp	:	SIZE exp       %prec UNARY
-			{ write_exp_elt_opcode (UNOP_SIZEOF); }
-	;
-
-
-exp	:	INC '(' exp ')'
-			{ write_exp_elt_opcode(UNOP_PREINCREMENT); }
-	;
-
-exp	:	INC '(' exp ',' exp ')'
-			{ write_exp_elt_opcode(BINOP_ASSIGN_MODIFY);
-			  write_exp_elt_opcode(BINOP_ADD);
-			  write_exp_elt_opcode(BINOP_ASSIGN_MODIFY); }
-	;
-
-exp	:	DEC '(' exp ')'
-			{ write_exp_elt_opcode(UNOP_PREDECREMENT);}
-	;
-
-exp	:	DEC '(' exp ',' exp ')'
-			{ write_exp_elt_opcode(BINOP_ASSIGN_MODIFY);
-			  write_exp_elt_opcode(BINOP_SUB);
-			  write_exp_elt_opcode(BINOP_ASSIGN_MODIFY); }
-	;
-
-exp	:	exp DOT NAME
-			{ write_exp_elt_opcode (STRUCTOP_STRUCT);
-			  write_exp_string ($3);
-			  write_exp_elt_opcode (STRUCTOP_STRUCT); }
-	;
-
-exp	:	set
-	;
-
-exp	:	exp IN set
-			{ error("Sets are not implemented.");}
-	;
-
-exp	:	INCL '(' exp ',' exp ')'
-			{ error("Sets are not implemented.");}
-	;
-
-exp	:	EXCL '(' exp ',' exp ')'
-			{ error("Sets are not implemented.");}
-
-set	:	'{' arglist '}'
-			{ error("Sets are not implemented.");}
-	|	type '{' arglist '}'
-			{ error("Sets are not implemented.");}
-	;
-
-
-/* Modula-2 array subscript notation [a,b,c...] */
-exp     :       exp '['
-                        /* This function just saves the number of arguments
-			   that follow in the list.  It is *not* specific to
-			   function types */
-                        { start_arglist(); }
-                non_empty_arglist ']'  %prec DOT
-                        { write_exp_elt_opcode (MULTI_SUBSCRIPT);
-			  write_exp_elt_longcst ((LONGEST) end_arglist());
-			  write_exp_elt_opcode (MULTI_SUBSCRIPT); }
-        ;
-
-exp	:	exp '('
-			/* This is to save the value of arglist_len
-			   being accumulated by an outer function call.  */
-			{ start_arglist (); }
-		arglist ')'	%prec DOT
-			{ write_exp_elt_opcode (OP_FUNCALL);
-			  write_exp_elt_longcst ((LONGEST) end_arglist ());
-			  write_exp_elt_opcode (OP_FUNCALL); }
-	;
-
-arglist	:
-	;
-
-arglist	:	exp
-			{ arglist_len = 1; }
-	;
-
-arglist	:	arglist ',' exp   %prec ABOVE_COMMA
-			{ arglist_len++; }
-	;
-
-non_empty_arglist
-        :       exp
-                        { arglist_len = 1; }
-	;
-
-non_empty_arglist
-        :       non_empty_arglist ',' exp %prec ABOVE_COMMA
-     	       	    	{ arglist_len++; }
-     	;
-
-/* GDB construct */
-exp	:	'{' type '}' exp  %prec UNARY
-			{ write_exp_elt_opcode (UNOP_MEMVAL);
-			  write_exp_elt_type ($2);
-			  write_exp_elt_opcode (UNOP_MEMVAL); }
-	;
-
-exp     :       type '(' exp ')' %prec UNARY
-                        { write_exp_elt_opcode (UNOP_CAST);
-			  write_exp_elt_type ($1);
-			  write_exp_elt_opcode (UNOP_CAST); }
-	;
-
-exp	:	'(' exp ')'
-			{ }
-	;
-
-/* Binary operators in order of decreasing precedence.  Note that some
-   of these operators are overloaded!  (ie. sets) */
-
-/* GDB construct */
-exp	:	exp '@' exp
-			{ write_exp_elt_opcode (BINOP_REPEAT); }
-	;
-
-exp	:	exp '*' exp
-			{ write_exp_elt_opcode (BINOP_MUL); }
-	;
-
-exp	:	exp '/' exp
-			{ write_exp_elt_opcode (BINOP_DIV); }
-	;
-
-exp     :       exp DIV exp
-                        { write_exp_elt_opcode (BINOP_INTDIV); }
-        ;
-
-exp	:	exp MOD exp
-			{ write_exp_elt_opcode (BINOP_REM); }
-	;
-
-exp	:	exp '+' exp
-			{ write_exp_elt_opcode (BINOP_ADD); }
-	;
-
-exp	:	exp '-' exp
-			{ write_exp_elt_opcode (BINOP_SUB); }
-	;
-
-exp	:	exp '=' exp
-			{ write_exp_elt_opcode (BINOP_EQUAL); }
-	;
-
-exp	:	exp NOTEQUAL exp
-			{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
-        |       exp '#' exp
-                        { write_exp_elt_opcode (BINOP_NOTEQUAL); }
-	;
-
-exp	:	exp LEQ exp
-			{ write_exp_elt_opcode (BINOP_LEQ); }
-	;
-
-exp	:	exp GEQ exp
-			{ write_exp_elt_opcode (BINOP_GEQ); }
-	;
-
-exp	:	exp '<' exp
-			{ write_exp_elt_opcode (BINOP_LESS); }
-	;
-
-exp	:	exp '>' exp
-			{ write_exp_elt_opcode (BINOP_GTR); }
-	;
-
-exp	:	exp LOGICAL_AND exp
-			{ write_exp_elt_opcode (BINOP_LOGICAL_AND); }
-	;
-
-exp	:	exp OROR exp
-			{ write_exp_elt_opcode (BINOP_LOGICAL_OR); }
-	;
-
-exp	:	exp ASSIGN exp
-			{ write_exp_elt_opcode (BINOP_ASSIGN); }
-	;
-
-
-/* Constants */
-
-exp	:	M2_TRUE
-			{ write_exp_elt_opcode (OP_BOOL);
-			  write_exp_elt_longcst ((LONGEST) $1);
-			  write_exp_elt_opcode (OP_BOOL); }
-	;
-
-exp	:	M2_FALSE
-			{ write_exp_elt_opcode (OP_BOOL);
-			  write_exp_elt_longcst ((LONGEST) $1);
-			  write_exp_elt_opcode (OP_BOOL); }
-	;
-
-exp	:	INT
-			{ write_exp_elt_opcode (OP_LONG);
-			  write_exp_elt_type (builtin_type_m2_int);
-			  write_exp_elt_longcst ((LONGEST) $1);
-			  write_exp_elt_opcode (OP_LONG); }
-	;
-
-exp	:	UINT
-			{
-			  write_exp_elt_opcode (OP_LONG);
-			  write_exp_elt_type (builtin_type_m2_card);
-			  write_exp_elt_longcst ((LONGEST) $1);
-			  write_exp_elt_opcode (OP_LONG);
-			}
-	;
-
-exp	:	CHAR
-			{ write_exp_elt_opcode (OP_LONG);
-			  write_exp_elt_type (builtin_type_m2_char);
-			  write_exp_elt_longcst ((LONGEST) $1);
-			  write_exp_elt_opcode (OP_LONG); }
-	;
-
-
-exp	:	FLOAT
-			{ write_exp_elt_opcode (OP_DOUBLE);
-			  write_exp_elt_type (builtin_type_m2_real);
-			  write_exp_elt_dblcst ($1);
-			  write_exp_elt_opcode (OP_DOUBLE); }
-	;
-
-exp	:	variable
-	;
-
-exp	:	SIZE '(' type ')'	%prec UNARY
-			{ write_exp_elt_opcode (OP_LONG);
-			  write_exp_elt_type (builtin_type_int);
-			  write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
-			  write_exp_elt_opcode (OP_LONG); }
-	;
-
-exp	:	STRING
-			{ write_exp_elt_opcode (OP_M2_STRING);
-			  write_exp_string ($1);
-			  write_exp_elt_opcode (OP_M2_STRING); }
-	;
-
-/* This will be used for extensions later.  Like adding modules. */
-block	:	fblock	
-			{ $$ = SYMBOL_BLOCK_VALUE($1); }
-	;
-
-fblock	:	BLOCKNAME
-			{ struct symbol *sym
-			    = lookup_symbol (copy_name ($1), expression_context_block,
-					     VAR_NAMESPACE, 0, NULL);
-			  $$ = sym;}
-	;
-			     
-
-/* GDB scope operator */
-fblock	:	block COLONCOLON BLOCKNAME
-			{ struct symbol *tem
-			    = lookup_symbol (copy_name ($3), $1,
-					     VAR_NAMESPACE, 0, NULL);
-			  if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
-			    error ("No function \"%s\" in specified context.",
-				   copy_name ($3));
-			  $$ = tem;
-			}
-	;
-
-/* Useful for assigning to PROCEDURE variables */
-variable:	fblock
-			{ write_exp_elt_opcode(OP_VAR_VALUE);
-			  write_exp_elt_block (NULL);
-			  write_exp_elt_sym ($1);
-			  write_exp_elt_opcode (OP_VAR_VALUE); }
-	;
-
-/* GDB internal ($foo) variable */
-variable:	INTERNAL_VAR
-	;
-
-/* GDB scope operator */
-variable:	block COLONCOLON NAME
-			{ struct symbol *sym;
-			  sym = lookup_symbol (copy_name ($3), $1,
-					       VAR_NAMESPACE, 0, NULL);
-			  if (sym == 0)
-			    error ("No symbol \"%s\" in specified context.",
-				   copy_name ($3));
-
-			  write_exp_elt_opcode (OP_VAR_VALUE);
-			  /* block_found is set by lookup_symbol.  */
-			  write_exp_elt_block (block_found);
-			  write_exp_elt_sym (sym);
-			  write_exp_elt_opcode (OP_VAR_VALUE); }
-	;
-
-/* Base case for variables. */
-variable:	NAME
-			{ struct symbol *sym;
-			  int is_a_field_of_this;
-
- 			  sym = lookup_symbol (copy_name ($1),
-					       expression_context_block,
-					       VAR_NAMESPACE,
-					       &is_a_field_of_this,
-					       NULL);
-			  if (sym)
-			    {
-			      if (symbol_read_needs_frame (sym))
-				{
-				  if (innermost_block == 0 ||
-				      contained_in (block_found, 
-						    innermost_block))
-				    innermost_block = block_found;
-				}
-
-			      write_exp_elt_opcode (OP_VAR_VALUE);
-			      /* We want to use the selected frame, not
-				 another more inner frame which happens to
-				 be in the same block.  */
-			      write_exp_elt_block (NULL);
-			      write_exp_elt_sym (sym);
-			      write_exp_elt_opcode (OP_VAR_VALUE);
-			    }
-			  else
-			    {
-			      struct minimal_symbol *msymbol;
-			      register char *arg = copy_name ($1);
-
-			      msymbol =
-				lookup_minimal_symbol (arg, NULL, NULL);
-			      if (msymbol != NULL)
-				{
-				  write_exp_msymbol
-				    (msymbol,
-				     lookup_function_type (builtin_type_int),
-				     builtin_type_int);
-				}
-			      else if (!have_full_symbols () && !have_partial_symbols ())
-				error ("No symbol table is loaded.  Use the \"symbol-file\" command.");
-			      else
-				error ("No symbol \"%s\" in current context.",
-				       copy_name ($1));
-			    }
-			}
-	;
-
-type
-	:	TYPENAME
-			{ $$ = lookup_typename (copy_name ($1),
-						expression_context_block, 0); }
-
-	;
-
-%%
-
-#if 0  /* FIXME! */
-int
-overflow(a,b)
-   long a,b;
-{
-   return (MAX_OF_TYPE(builtin_type_m2_int) - b) < a;
-}
-
-int
-uoverflow(a,b)
-   unsigned long a,b;
-{
-   return (MAX_OF_TYPE(builtin_type_m2_card) - b) < a;
-}
-#endif /* FIXME */
-
-/* Take care of parsing a number (anything that starts with a digit).
-   Set yylval and return the token type; update lexptr.
-   LEN is the number of characters in it.  */
-
-/*** Needs some error checking for the float case ***/
-
-static int
-parse_number (olen)
-     int olen;
-{
-  register char *p = lexptr;
-  register LONGEST n = 0;
-  register LONGEST prevn = 0;
-  register int c,i,ischar=0;
-  register int base = input_radix;
-  register int len = olen;
-  int unsigned_p = number_sign == 1 ? 1 : 0;
-
-  if(p[len-1] == 'H')
-  {
-     base = 16;
-     len--;
-  }
-  else if(p[len-1] == 'C' || p[len-1] == 'B')
-  {
-     base = 8;
-     ischar = p[len-1] == 'C';
-     len--;
-  }
-
-  /* Scan the number */
-  for (c = 0; c < len; c++)
-  {
-    if (p[c] == '.' && base == 10)
-      {
-	/* It's a float since it contains a point.  */
-	yylval.dval = atof (p);
-	lexptr += len;
-	return FLOAT;
-      }
-    if (p[c] == '.' && base != 10)
-       error("Floating point numbers must be base 10.");
-    if (base == 10 && (p[c] < '0' || p[c] > '9'))
-       error("Invalid digit \'%c\' in number.",p[c]);
- }
-
-  while (len-- > 0)
-    {
-      c = *p++;
-      n *= base;
-      if( base == 8 && (c == '8' || c == '9'))
-	 error("Invalid digit \'%c\' in octal number.",c);
-      if (c >= '0' && c <= '9')
-	i = c - '0';
-      else
-	{
-	  if (base == 16 && c >= 'A' && c <= 'F')
-	    i = c - 'A' + 10;
-	  else
-	     return ERROR;
-	}
-      n+=i;
-      if(i >= base)
-	 return ERROR;
-      if(!unsigned_p && number_sign == 1 && (prevn >= n))
-	 unsigned_p=1;		/* Try something unsigned */
-      /* Don't do the range check if n==i and i==0, since that special
-	 case will give an overflow error. */
-      if(RANGE_CHECK && n!=i && i)
-      {
-	 if((unsigned_p && (unsigned)prevn >= (unsigned)n) ||
-	    ((!unsigned_p && number_sign==-1) && -prevn <= -n))
-	    range_error("Overflow on numeric constant.");
-      }
-	 prevn=n;
-    }
-
-  lexptr = p;
-  if(*p == 'B' || *p == 'C' || *p == 'H')
-     lexptr++;			/* Advance past B,C or H */
-
-  if (ischar)
-  {
-     yylval.ulval = n;
-     return CHAR;
-  }
-  else if ( unsigned_p && number_sign == 1)
-  {
-     yylval.ulval = n;
-     return UINT;
-  }
-  else if((unsigned_p && (n<0))) {
-     range_error("Overflow on numeric constant -- number too large.");
-     /* But, this can return if range_check == range_warn.  */
-  }
-  yylval.lval = n;
-  return INT;
-}
-
-
-/* Some tokens */
-
-static struct
-{
-   char name[2];
-   int token;
-} tokentab2[] =
-{
-    { {'<', '>'},    NOTEQUAL 	},
-    { {':', '='},    ASSIGN	},
-    { {'<', '='},    LEQ	},
-    { {'>', '='},    GEQ	},
-    { {':', ':'},    COLONCOLON },
-
-};
-
-/* Some specific keywords */
-
-struct keyword {
-   char keyw[10];
-   int token;
-};
-
-static struct keyword keytab[] =
-{
-    {"OR" ,   OROR	 },
-    {"IN",    IN         },/* Note space after IN */
-    {"AND",   LOGICAL_AND},
-    {"ABS",   ABS	 },
-    {"CHR",   CHR	 },
-    {"DEC",   DEC	 },
-    {"NOT",   NOT	 },
-    {"DIV",   DIV    	 },
-    {"INC",   INC	 },
-    {"MAX",   MAX_FUNC	 },
-    {"MIN",   MIN_FUNC	 },
-    {"MOD",   MOD	 },
-    {"ODD",   ODD	 },
-    {"CAP",   CAP	 },
-    {"ORD",   ORD	 },
-    {"VAL",   VAL	 },
-    {"EXCL",  EXCL	 },
-    {"HIGH",  HIGH       },
-    {"INCL",  INCL	 },
-    {"SIZE",  SIZE       },
-    {"FLOAT", FLOAT_FUNC },
-    {"TRUNC", TRUNC	 },
-};
-
-
-/* Read one token, getting characters through lexptr.  */
-
-/* This is where we will check to make sure that the language and the operators used are
-   compatible  */
-
-static int
-yylex ()
-{
-  register int c;
-  register int namelen;
-  register int i;
-  register char *tokstart;
-  register char quote;
-
- retry:
-
-  tokstart = lexptr;
-
-
-  /* See if it is a special token of length 2 */
-  for( i = 0 ; i < (int) (sizeof tokentab2 / sizeof tokentab2[0]) ; i++)
-     if(STREQN(tokentab2[i].name, tokstart, 2))
-     {
-	lexptr += 2;
-	return tokentab2[i].token;
-     }
-
-  switch (c = *tokstart)
-    {
-    case 0:
-      return 0;
-
-    case ' ':
-    case '\t':
-    case '\n':
-      lexptr++;
-      goto retry;
-
-    case '(':
-      paren_depth++;
-      lexptr++;
-      return c;
-
-    case ')':
-      if (paren_depth == 0)
-	return 0;
-      paren_depth--;
-      lexptr++;
-      return c;
-
-    case ',':
-      if (comma_terminates && paren_depth == 0)
-	return 0;
-      lexptr++;
-      return c;
-
-    case '.':
-      /* Might be a floating point number.  */
-      if (lexptr[1] >= '0' && lexptr[1] <= '9')
-	break;			/* Falls into number code.  */
-      else
-      {
-	 lexptr++;
-	 return DOT;
-      }
-
-/* These are character tokens that appear as-is in the YACC grammar */
-    case '+':
-    case '-':
-    case '*':
-    case '/':
-    case '^':
-    case '<':
-    case '>':
-    case '[':
-    case ']':
-    case '=':
-    case '{':
-    case '}':
-    case '#':
-    case '@':
-    case '~':
-    case '&':
-      lexptr++;
-      return c;
-
-    case '\'' :
-    case '"':
-      quote = c;
-      for (namelen = 1; (c = tokstart[namelen]) != quote && c != '\0'; namelen++)
-	if (c == '\\')
-	  {
-	    c = tokstart[++namelen];
-	    if (c >= '0' && c <= '9')
-	      {
-		c = tokstart[++namelen];
-		if (c >= '0' && c <= '9')
-		  c = tokstart[++namelen];
-	      }
-	  }
-      if(c != quote)
-	 error("Unterminated string or character constant.");
-      yylval.sval.ptr = tokstart + 1;
-      yylval.sval.length = namelen - 1;
-      lexptr += namelen + 1;
-
-      if(namelen == 2)  	/* Single character */
-      {
-	   yylval.ulval = tokstart[1];
-	   return CHAR;
-      }
-      else
-	 return STRING;
-    }
-
-  /* Is it a number?  */
-  /* Note:  We have already dealt with the case of the token '.'.
-     See case '.' above.  */
-  if ((c >= '0' && c <= '9'))
-    {
-      /* It's a number.  */
-      int got_dot = 0, got_e = 0;
-      register char *p = tokstart;
-      int toktype;
-
-      for (++p ;; ++p)
-	{
-	  if (!got_e && (*p == 'e' || *p == 'E'))
-	    got_dot = got_e = 1;
-	  else if (!got_dot && *p == '.')
-	    got_dot = 1;
-	  else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
-		   && (*p == '-' || *p == '+'))
-	    /* This is the sign of the exponent, not the end of the
-	       number.  */
-	    continue;
-	  else if ((*p < '0' || *p > '9') &&
-		   (*p < 'A' || *p > 'F') &&
-		   (*p != 'H'))  /* Modula-2 hexadecimal number */
-	    break;
-	}
-	toktype = parse_number (p - tokstart);
-        if (toktype == ERROR)
-	  {
-	    char *err_copy = (char *) alloca (p - tokstart + 1);
-
-	    memcpy (err_copy, tokstart, p - tokstart);
-	    err_copy[p - tokstart] = 0;
-	    error ("Invalid number \"%s\".", err_copy);
-	  }
-	lexptr = p;
-	return toktype;
-    }
-
-  if (!(c == '_' || c == '$'
-	|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
-    /* We must have come across a bad character (e.g. ';').  */
-    error ("Invalid character '%c' in expression.", c);
-
-  /* It's a name.  See how long it is.  */
-  namelen = 0;
-  for (c = tokstart[namelen];
-       (c == '_' || c == '$' || (c >= '0' && c <= '9')
-	|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
-       c = tokstart[++namelen])
-    ;
-
-  /* The token "if" terminates the expression and is NOT
-     removed from the input stream.  */
-  if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
-    {
-      return 0;
-    }
-
-  lexptr += namelen;
-
-  /*  Lookup special keywords */
-  for(i = 0 ; i < (int) (sizeof(keytab) / sizeof(keytab[0])) ; i++)
-     if(namelen == strlen(keytab[i].keyw) && STREQN(tokstart,keytab[i].keyw,namelen))
-	   return keytab[i].token;
-
-  yylval.sval.ptr = tokstart;
-  yylval.sval.length = namelen;
-
-  if (*tokstart == '$')
-    {
-      write_dollar_variable (yylval.sval);
-      return INTERNAL_VAR;
-    }
-
-  /* Use token-type BLOCKNAME for symbols that happen to be defined as
-     functions.  If this is not so, then ...
-     Use token-type TYPENAME for symbols that happen to be defined
-     currently as names of types; NAME for other symbols.
-     The caller is not constrained to care about the distinction.  */
- {
-
-
-    char *tmp = copy_name (yylval.sval);
-    struct symbol *sym;
-
-    if (lookup_partial_symtab (tmp))
-      return BLOCKNAME;
-    sym = lookup_symbol (tmp, expression_context_block,
-			 VAR_NAMESPACE, 0, NULL);
-    if (sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
-      return BLOCKNAME;
-    if (lookup_typename (copy_name (yylval.sval), expression_context_block, 1))
-      return TYPENAME;
-
-    if(sym)
-    {
-       switch(sym->aclass)
-       {
-       case LOC_STATIC:
-       case LOC_REGISTER:
-       case LOC_ARG:
-       case LOC_REF_ARG:
-       case LOC_REGPARM:
-       case LOC_REGPARM_ADDR:
-       case LOC_LOCAL:
-       case LOC_LOCAL_ARG:
-       case LOC_BASEREG:
-       case LOC_BASEREG_ARG:
-       case LOC_CONST:
-       case LOC_CONST_BYTES:
-       case LOC_OPTIMIZED_OUT:
-	  return NAME;
-
-       case LOC_TYPEDEF:
-	  return TYPENAME;
-
-       case LOC_BLOCK:
-	  return BLOCKNAME;
-
-       case LOC_UNDEF:
-	  error("internal:  Undefined class in m2lex()");
-
-       case LOC_LABEL:
-       case LOC_UNRESOLVED:
-	  error("internal:  Unforseen case in m2lex()");
-       }
-    }
-    else
-    {
-       /* Built-in BOOLEAN type.  This is sort of a hack. */
-       if(STREQN(tokstart,"TRUE",4))
-       {
-	  yylval.ulval = 1;
-	  return M2_TRUE;
-       }
-       else if(STREQN(tokstart,"FALSE",5))
-       {
-	  yylval.ulval = 0;
-	  return M2_FALSE;
-       }
-    }
-
-    /* Must be another type of name... */
-    return NAME;
- }
-}
-
-#if 0		/* Unused */
-static char *
-make_qualname(mod,ident)
-   char *mod, *ident;
-{
-   char *new = malloc(strlen(mod)+strlen(ident)+2);
-
-   strcpy(new,mod);
-   strcat(new,".");
-   strcat(new,ident);
-   return new;
-}
-#endif  /* 0 */
-
-void
-yyerror (msg)
-     char *msg;
-{
-  error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);
-}