/[ascend]/trunk/base/generic/compiler/syntax.h
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revision 73 by jds, Tue Aug 2 11:20:09 2005 UTC revision 74 by jds, Fri Dec 2 23:33:32 2005 UTC
# Line 1  Line 1 
1  /*  /*
2   *  Syntax Routines   *  Syntax Routines
3   *  by Tom Epperly   *  by Tom Epperly
4   *  Created: 3/22/1990   *  Created: 3/22/1990
# Line 25  Line 25 
25   *  with the program; if not, write to the Free Software Foundation, Inc., 675   *  with the program; if not, write to the Free Software Foundation, Inc., 675
26   *  Mass Ave, Cambridge, MA 02139 USA.  Check the file named COPYING.   *  Mass Ave, Cambridge, MA 02139 USA.  Check the file named COPYING.
27   */   */
28                                        
29  /** @file  /** @file
30   *  Syntax Routines.   *  Syntax Routines.
31   *  These routines support the yacc parsing file ascParse.y.  This module   *  These routines support the yacc parsing file ascParse.y.  This module
# Line 33  Line 33 
33   *  <pre>   *  <pre>
34   *  When #including syntax.h, make sure these files are #included first:   *  When #including syntax.h, make sure these files are #included first:
35   *         #include "utilities/ascConfig.h"   *         #include "utilities/ascConfig.h"
36   *         #include "fractions.h"   *         #include "compiler/fractions.h"
37   *         #include "compiler.h"   *         #include "compiler/compiler.h"
38   *         #include "dimen.h"   *         #include "compiler/dimen.h"
39   *         #include "types.h"   *         #include "compiler/types.h"
40   *         #include "exprs.h"   *         #include "compiler/exprs.h"
41   *         #include "stattypes.h"   *         #include "compiler/stattypes.h"
42   *  </pre>   *  </pre>
43   */   */
44    
# Line 47  Line 47 
47    
48  extern unsigned NumberOfRelOps(struct Expr *ex);  extern unsigned NumberOfRelOps(struct Expr *ex);
49  /**<  /**<
50   *  <!--  unsigned NumberOfRelOps(ex)                                  -->   *  Counts the number of relation operators in the given Expr.
51   *  <!--  struct Expr *ex;                                             -->   *
52   *  Return the number of relation operators in the given Expr.   *  @param ex The expresion to evaluate.
53     *  @return The number of relation operators in ex.
54   */   */
55    
56  extern int IsRelation(struct Expr *ex);  extern int IsRelation(struct Expr *ex);
57  /**<  /**<
58   *  <!--  unsigned IsRelation(ex)                                      -->   *  Tests whether an expression is a real or logical relation.
59   *  <!--  struct Expr *ex;                                             -->   *
60   *  Return 1 in case of a real relation. 0 if logical relation.   *  @param ex The expresion to test.
61     *  @return Returns 1 if ex is a real relation, 0 if a
62     *          logical relation.
63     *  @todo compiler/syntax:IsRelation() notated as broken in source file.
64     *        Fix or remove comment.
65   */   */
66    
67  extern int GetParseRelnsFlag(void);  extern int GetParseRelnsFlag(void);
68  /**<  /**<
69   *  <!--  int GetParseRelnsFlag(void);                                 -->   *  Retrieves the value of the parse relations flag. If this flag is
70   *  Returns the value of the parse relations flag. If this flag is set to   *  non-zero (the default), normal ASCEND relations will be parsed.  
71   *  TRUE, which it is by default, normal ASCEND relations will be parsed;   *  If it is 0, they will not be.  This flag does not affect
72   *  otherwise they will not be. This does not affect external relations.   *  external relations.
73     *
74     *  @return The current value of the parse relations flag.
75   */   */
76    
77  extern void SetParseRelnsFlag(int flag);  extern void SetParseRelnsFlag(int flag);
78  /**<  /**<
79   *  <!--  void SetParseRelnsFlag(flag);                                -->   *  Sets the parse relations flag. Any nonzero integer will
80   *  This function sets the parse relations flag. Any nonzero integer will   *  cause relations to be parsed (see GetParseRelnsFlag()).
81   *  turn the flag on. Later it may be given more meaning.   *  Later it may be given more meaning.
82     *
83     *  @param flag The new value for the parse relations flag.
84   */   */
85    
86  #endif  /* __SYNTAX_H_SEEN__ */  #endif  /* __SYNTAX_H_SEEN__ */
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john.pye@anu.edu.au
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