120ca87015
git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5000 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d
62 lines
1.7 KiB
Plaintext
62 lines
1.7 KiB
Plaintext
/* Parser for the FreeCAD selection filter language */
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/* (c) 2010 Juergen Riegel LGPL
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/* bison -o SelectionFilter.tab.c SelectionFilter.y */
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/* Represents the many different ways we can access our data */
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%union {
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std::string *string;
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Node_Object *object;
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Node_Slice *slice;
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Node_Block *block;
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int token;
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int number;
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}
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/* Define our terminal symbols (tokens). This should
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match our tokens.l lex file. We also define the node type
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they represent.
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*/
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%token <string> TIDENTIFIER
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%token <token> TSUB TSELECT TCOUNT TSLICE TNAMESPACE
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%token <number> TNUMBER
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/* Define the type of node our nonterminal symbols represent.
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The types refer to the %union declaration above.
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*/
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%type <slice> count
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%type <object> matchline
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%type <string> type subname
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%type <block> matchlines block
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%start filter
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%%
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type : TSELECT TIDENTIFIER { $$ = $2 }
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| TSELECT TIDENTIFIER TNAMESPACE TIDENTIFIER { $$ = new std::string(*$2 + "::" + *$4) }
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subname : { $$ = 0 }
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| TSUB TIDENTIFIER { $$ = $2 }
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count : { $$ = 0 }
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| TCOUNT TNUMBER TSLICE TNUMBER { $$ = new Node_Slice($2,$4) }
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| TCOUNT TNUMBER TSLICE { $$ = new Node_Slice($2) }
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| TCOUNT TNUMBER { $$ = new Node_Slice($2,$2) }
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matchline : type subname count { $$ = new Node_Object($1,$2,$3) }
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matchlines : matchline { $$ = new Node_Block($1); }
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| matchlines matchline { $$ = $1 ; $$->Objects.push_back($2); }
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block : matchlines { $$ = $1 }
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filter: block { TopBlock = $1 }
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;
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%%
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