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/* Copyright 2018, UCAR/Unidata and OPeNDAP, Inc.
See the COPYRIGHT file for more information. */
/*The lines down to DO NOT DELETE ... comment are specific to the C Parser.
They will be commennted out when building a java parser.
*/
%pure-parser
%lex-param {DCEparsestate* parsestate}
%parse-param {DCEparsestate* parsestate}
%{
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include "netcdf.h"
#include "ncbytes.h"
#include "nclist.h"
#include "dceconstraints.h"
#include "dceparselex.h"
%}
/*DO NOT DELETE THIS LINE*/
%token SCAN_WORD
%token SCAN_STRINGCONST
%token SCAN_NUMBERCONST
%start constraints
%%
constraints:
optquestionmark projections
| optquestionmark selections
| optquestionmark projections selections
| /*empty*/
;
optquestionmark: '?' | /*empty*/ ;
projections:
projectionlist {projections(parsestate,$1);}
;
selections:
clauselist {selections(parsestate,$1);}
;
projectionlist:
projection
{$$=projectionlist(parsestate,(Object)null,$1);}
| projectionlist ',' projection
{$$=projectionlist(parsestate,$1,$3);}
;
projection:
segmentlist
{$$=projection(parsestate,$1);}
| function
{$$=$1;}
;
function:
ident '(' ')'
{$$=function(parsestate,$1,null);}
| ident '(' arg_list ')'
{$$=function(parsestate,$1,$3);}
;
segmentlist:
segment
{$$=segmentlist(parsestate,null,$1);}
| segmentlist '.' segment
{$$=segmentlist(parsestate,$1,$3);}
;
segment:
word
{$$=segment(parsestate,$1,null);}
| word rangelist
{$$=segment(parsestate,$1,$2);}
;
rangelist:
range
{$$=rangelist(parsestate,null,$1);}
| rangelist range
{$$=rangelist(parsestate,$1,$2);}
;
range:
'[' number ']'
{$$=range(parsestate,$2,null,null);}
| '[' number ':' number ']'
{$$=range(parsestate,$2,null,$4);}
| '[' number ':' number ':' number ']'
{$$=range(parsestate,$2,$4,$6);}
;
range1: '[' number ']'
{$$ = range1(parsestate,$2);}
;
clauselist:
sel_clause
{$$=clauselist(parsestate,null,$1);}
| clauselist sel_clause
{$$=clauselist(parsestate,$1,$2);}
;
sel_clause:
'&' value rel_op '{' value_list '}'
{$$=sel_clause(parsestate,1,$2,$3,$5);} /*1,2 distinguish cases*/
| '&' value rel_op value
{$$=sel_clause(parsestate,2,$2,$3,$4);}
| '&' boolfunction
{$$=$1;}
;
value_list:
value
{$$=value_list(parsestate,null,$1);}
| value_list ',' value
{$$=value_list(parsestate,$1,$3);}
;
value:
var
{$$=value(parsestate,$1);}
| function
{$$=value(parsestate,$1);}
| constant
{$$=value(parsestate,$1);}
;
constant:
number
{$$=constant(parsestate,$1,SCAN_NUMBERCONST);}
| string
{$$=constant(parsestate,$1,SCAN_STRINGCONST);}
;
var:
indexpath
{$$=var(parsestate,$1);}
;
indexpath:
index
{$$=indexpath(parsestate,null,$1);}
| indexpath '.' index
{$$=indexpath(parsestate,$1,$3);}
;
index:
word
{$$=indexer(parsestate,$1,null);}
| word array_indices
{$$=indexer(parsestate,$1,$2);}
;
array_indices:
range1
{$$=array_indices(parsestate,null,$1);}
| array_indices range1
{$$=array_indices(parsestate,$1,$2);}
;
boolfunction:
ident '(' ')'
{$$=function(parsestate,$1,null);}
| ident '(' arg_list ')'
{$$=function(parsestate,$1,$3);}
;
arg_list:
value
{$$=arg_list(parsestate,null,$1);}
| value_list ',' value
{$$=arg_list(parsestate,$1,$3);}
;
rel_op:
'=' {$$=makeselectiontag(CEO_EQ);}
| '>' {$$=makeselectiontag(CEO_GT);}
| '<' {$$=makeselectiontag(CEO_LT);}
| '!' '=' {$$=makeselectiontag(CEO_NEQ);}
| '>' '=' {$$=makeselectiontag(CEO_GE);}
| '<' '=' {$$=makeselectiontag(CEO_LE);}
| '=' '~' {$$=makeselectiontag(CEO_RE);}
;
ident: word
{$$ = $1;}
;
word: SCAN_WORD
{$$ = checkobject($1);}
;
number: SCAN_NUMBERCONST
{$$ = checkobject($1);}
;
string: SCAN_STRINGCONST
{$$ = checkobject($1);}
;
%%
|
