179 lines
2.3 KiB
Plaintext
179 lines
2.3 KiB
Plaintext
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%token QNAME
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%token NAME_COLON_STAR
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%token DOT
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%token DOT_DOT
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%token AT
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%token AXIS_NAME
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%token FUNCTION_NAME
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%token COMMENT
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%token PI
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%token TEXT
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%token NODE
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%token STAR
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%token LPAR
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%token RPAR
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%token LSQB
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%token RSQB
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%token LITERAL
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%token NUMBER
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%token COLON_COLON
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%token DOLLAR_QNAME
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%token SLASH
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%token SLASH_SLASH
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%token VBAR
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%token COMMA
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%token PLUS
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%token MINUS
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%token EQUALS
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%token GT
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%token LT
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%token GTE
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%token LTE
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%token MULTIPLY
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%token AND
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%token OR
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%token MOD
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%token DIV
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%token QUO
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%%
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expr :
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or_expr
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;
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or_expr :
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and_expr
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| or_expr OR and_expr
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;
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and_expr :
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equality_expr
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| and_expr AND equality_expr
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;
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equality_expr :
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relational_expr
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| equality_expr EQUALS relational_expr
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;
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relational_expr :
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additive_expr
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| relational_expr LT additive_expr
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| relational_expr GT additive_expr
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| relational_expr LTE additive_expr
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| relational_expr GTE additive_expr
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;
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additive_expr :
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multiplicative_expr
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| additive_expr PLUS multiplicative_expr
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| additive_expr MINUS multiplicative_expr
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;
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multiplicative_expr :
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unary_expr
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| multiplicative_expr MULTIPLY unary_expr
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| multiplicative_expr DIV unary_expr
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| multiplicative_expr MOD unary_expr
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;
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unary_expr :
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union_expr
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| '-' unary_expr
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;
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union_expr :
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path_expr
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| union_expr VBAR path_expr
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;
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path_expr :
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location_path
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| primary_expr predicates segment
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;
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segment :
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/* empty */
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| SLASH relative_location_path
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| SLASH_SLASH relative_location_path
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;
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location_path :
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relative_location_path
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| absolute_location_path
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;
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absolute_location_path :
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SLASH
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| SLASH relative_location_path
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| SLASH_SLASH relative_location_path
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;
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relative_location_path :
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step
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| relative_location_path SLASH step
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| relative_location_path SLASH_SLASH step
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;
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step :
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axis node_test predicates
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| DOT
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| DOT_DOT
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;
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axis:
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/* empty */
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| AXIS_NAME COLON_COLON
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| AT
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;
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predicates :
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/* empty */
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| predicates LSQB expr RSQB
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;
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primary_expr :
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DOLLAR_QNAME
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| LPAR expr RPAR
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| LITERAL
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| NUMBER
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| function_call
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;
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function_call :
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FUNCTION_NAME LPAR opt_args RPAR
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;
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opt_args :
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/* empty */
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| args
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;
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args :
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expr
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| args COMMA expr
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;
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node_test :
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QNAME
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| STAR
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| NAME_COLON_STAR
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| PI LPAR opt_literal RPAR
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| COMMENT LPAR RPAR
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| TEXT LPAR RPAR
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| NODE LPAR RPAR
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;
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opt_literal :
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/* empty */
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| LITERAL
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;
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