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//
// Hoa
//
//
// @license
//
// New BSD License
//
// Copyright © 2007-2017, Hoa community. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Hoa nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS AND CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Grammar \Hoa\Ruler\Grammar.
//
// Provide grammar for ruler.
//
// @copyright Copyright © 2007-2017 Hoa community.
// @license New BSD License
//
%skip space \s
// Scalars.
%token true (?i)true
%token false (?i)false
%token null (?i)null
// Logical operators
%token not (?i)not\b
%token and (?i)and\b
%token or (?i)or\b
%token xor (?i)xor\b
// Value
%token string ("|')(.*?)(?<!\\)\1
%token float \d+\.\d+
%token integer \d+
%token parenthesis_ \(
%token _parenthesis \)
%token bracket_ \[
%token _bracket \]
%token comma ,
%token dot \.
%token identifier [^\s\(\)\[\],\.]+
#expression:
logical_operation_primary()
logical_operation_primary:
logical_operation_secondary()
( ( ::or:: #or | ::xor:: #xor ) logical_operation_primary() )?
logical_operation_secondary:
operation()
( ::and:: #and logical_operation_secondary() )?
operation:
operand() ( <identifier> logical_operation_primary() #operation )?
operand:
::parenthesis_:: logical_operation_primary() ::_parenthesis::
| value()
value:
::not:: logical_operation_primary() #not
| <true> | <false> | <null> | <float> | <integer> | <string>
| array_declaration()
| chain()
chain:
( variable() | function_call() )
( ( array_access() | object_access() ) #variable_access )*
variable:
<identifier>
#array_access:
::bracket_:: value() ::_bracket::
object_access:
::dot:: ( <identifier> #attribute_access | function_call() #method_access )
#array_declaration:
::bracket_:: value() ( ::comma:: value() )* ::_bracket::
#function_call:
<identifier> ::parenthesis_::
( logical_operation_primary() ( ::comma:: logical_operation_primary() )* )?
::_parenthesis::
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