/*
* Mesa 3-D graphics library
* Version: 6.6
*
* Copyright (C) 2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file slang_pp_expression.syn
* slang preprocessor expression parser
* \author Michal Krol
*/
/*
* Parses one or two (optional) expressions on literal integer constants. Those expressions come
* from #if #elif and #line directives. The preprocessor already parsed those directives and
* expanded the expression (expressions). All occurences of the operator "defined" are already
* replaced with either "0" or "1" literals.
*/
.syntax expression;
/*
* Those separate individual expressions.
* For #if/#elif case it is: EXP_EXPRESSION ... EXP_END
* For #line case it may be: EXP_EXPRESSION ... EXP_EXPRESSION ... EXP_END
*/
.emtcode EXP_END 0
.emtcode EXP_EXPRESSION 1
.emtcode OP_END 0
.emtcode OP_PUSHINT 1
.emtcode OP_LOGICALOR 2
.emtcode OP_LOGICALAND 3
.emtcode OP_OR 4
.emtcode OP_XOR 5
.emtcode OP_AND 6
.emtcode OP_EQUAL 7
.emtcode OP_NOTEQUAL 8
.emtcode OP_LESSEQUAL 9
.emtcode OP_GREATEREQUAL 10
.emtcode OP_LESS 11
.emtcode OP_GREATER 12
.emtcode OP_LEFTSHIFT 13
.emtcode OP_RIGHTSHIFT 14
.emtcode OP_ADD 15
.emtcode OP_SUBTRACT 16
.emtcode OP_MULTIPLY 17
.emtcode OP_DIVIDE 18
.emtcode OP_MODULUS 19
.emtcode OP_PLUS 20
.emtcode OP_MINUS 21
.emtcode OP_NEGATE 22
.emtcode OP_COMPLEMENT 23
expression
first_expression .and optional_second_expression .and optional_space .and '\0' .emit EXP_END;
first_expression
optional_space .and logical_or_expression .emit EXP_EXPRESSION .and .true .emit OP_END;
optional_second_expression
second_expression .or .true;
second_expression
space .and logical_or_expression .emit EXP_EXPRESSION .and .true .emit OP_END;
logical_or_expression
logical_and_expression .and .loop logical_or_expression_1;
logical_or_expression_1
barbar .and logical_and_expression .and .true .emit OP_LOGICALOR;
logical_and_expression
or_expression .and .loop logical_and_expression_1;
logical_and_expression_1
ampersandampersand .and or_expression .and .true .emit OP_LOGICALAND;
or_expression
xor_expression .and .loop or_expression_1;
or_expression_1
bar .and xor_expression .and .true .emit OP_OR;
xor_expression
and_expression .and .loop xor_expression_1;
xor_expression_1
caret .and and_expression .and .true .emit OP_XOR;
and_expression
equality_expression .and .loop and_expression_1;
and_expression_1
ampersand .and equality_expression .and .true .emit OP_AND;
equality_expression
relational_expression .and .loop equality_expression_1;
equality_expression_1
equality_expression_2 .or equality_expression_3;
equality_expression_2
equalsequals .and relational_expression .and .true .emit OP_EQUAL;
equality_expression_3
bangequals .and relational_expression .and .true .emit OP_NOTEQUAL;
relational_expression
shift_expression .and .loop relational_expression_1;
relational_expression_1
relational_expression_2 .or relational_expression_3 .or relational_expression_4 .or
relational_expression_5;
relational_expression_2
lessequals .and shift_expression .and .true .emit OP_LESSEQUAL;
relational_expression_3
greaterequals .and shift_expression .and .true .emit OP_GREATEREQUAL;
relational_expression_4
less .and shift_expression .and .true .emit OP_LESS;
relational_expression_5
greater .and shift_expression .and .true .emit OP_GREATER;
shift_expression
additive_expression .and .loop shift_expression_1;
shift_expression_1
shift_expression_2 .or shift_expression_3;
shift_expression_2
lessless .and additive_expression .and .true .emit OP_LEFTSHIFT;
shift_expression_3
greatergreater .and additive_expression .and .true .emit OP_RIGHTSHIFT;
additive_expression
multiplicative_expression .and .loop additive_expression_1;
additive_expression_1
additive_expression_2 .or additive_expression_3;
additive_expression_2
plus .and multiplicative_expression .and .true .emit OP_ADD;
additive_expression_3
dash .and multiplicative_expression .and .true .emit OP_SUBTRACT;
multiplicative_expression
unary_expression .and .loop multiplicative_expression_1;
multiplicative_expression_1
multiplicative_expression_2 .or multiplicative_expression_3 .or multiplicative_expression_4;
multiplicative_expression_2
star .and unary_expression .and .true .emit OP_MULTIPLY;
multiplicative_expression_3
slash .and unary_expression .and .true .emit OP_DIVIDE;
multiplicative_expression_4
percent .and unary_expression .and .true .emit OP_MODULUS;
unary_expression
primary_expression .or unary_expression_1 .or unary_expression_2 .or unary_expression_3 .or
unary_expression_4;
unary_expression_1
plus .and unary_expression .and .true .emit OP_PLUS;
unary_expression_2
dash .and unary_expression .and .true .emit OP_MINUS;
unary_expression_3
bang .and unary_expression .and .true .emit OP_NEGATE;
unary_expression_4
tilda .and unary_expression .and .true .emit OP_COMPLEMENT;
primary_expression
intconstant .or primary_expression_1;
primary_expression_1
lparen .and logical_or_expression .and rparen;
intconstant
integer .emit OP_PUSHINT;
integer
integer_dec;
integer_dec
digit_dec .emit 10 .emit * .and .loop digit_dec .emit * .and .true .emit '\0';
digit_dec
'0'-'9';
optional_space
.loop single_space;
space
single_space .and .loop single_space;
single_space
' ' .or '\t';
ampersand
optional_space .and '&' .and optional_space;
ampersandampersand
optional_space .and '&' .and '&' .and optional_space;
bang
optional_space .and '!' .and optional_space;
bangequals
optional_space .and '!' .and '=' .and optional_space;
bar
optional_space .and '|' .and optional_space;
barbar
optional_space .and '|' .and '|' .and optional_space;
caret
optional_space .and '^' .and optional_space;
dash
optional_space .and '-' .and optional_space;
equalsequals
optional_space .and '=' .and '=' .and optional_space;
greater
optional_space .and '>' .and optional_space;
greaterequals
optional_space .and '>' .and '=' .and optional_space;
greatergreater
optional_space .and '>' .and '>' .and optional_space;
less
optional_space .and '<' .and optional_space;
lessequals
optional_space .and '<' .and '=' .and optional_space;
lessless
optional_space .and '<' .and '<' .and optional_space;
lparen
optional_space .and '(' .and optional_space;
percent
optional_space .and '%' .and optional_space;
plus
optional_space .and '+' .and optional_space;
rparen
optional_space .and ')' .and optional_space;
slash
optional_space .and '/' .and optional_space;
star
optional_space .and '*' .and optional_space;
tilda
optional_space .and '~' .and optional_space;