1*b1cdbd2cSJim Jagielski# ************************************************************* 2*b1cdbd2cSJim Jagielski# 3*b1cdbd2cSJim Jagielski# Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski# or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski# distributed with this work for additional information 6*b1cdbd2cSJim Jagielski# regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski# to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski# "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski# with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski# 11*b1cdbd2cSJim Jagielski# http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski# 13*b1cdbd2cSJim Jagielski# Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski# software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski# KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski# specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski# under the License. 19*b1cdbd2cSJim Jagielski# 20*b1cdbd2cSJim Jagielski# ************************************************************* 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim JagielskiBased on the C grammar for arithmetic expressions 23*b1cdbd2cSJim Jagielski================================================= 24*b1cdbd2cSJim Jagielski 25*b1cdbd2cSJim Jagielskinumber_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9' 26*b1cdbd2cSJim Jagielski 27*b1cdbd2cSJim Jagielskinumber_exponent = 'e'|'E' 28*b1cdbd2cSJim Jagielski 29*b1cdbd2cSJim Jagielskibasic_number = basic_number number_digit | number_digit 30*b1cdbd2cSJim Jagielski 31*b1cdbd2cSJim Jagielskinumber = 32*b1cdbd2cSJim Jagielski basic_number | 33*b1cdbd2cSJim Jagielski 34*b1cdbd2cSJim Jagielski basic_number number_exponent basic_number | 35*b1cdbd2cSJim Jagielski basic_number number_exponent '-' basic_number | 36*b1cdbd2cSJim Jagielski basic_number number_exponent '+' basic_number | 37*b1cdbd2cSJim Jagielski 38*b1cdbd2cSJim Jagielski '.' basic_number number_exponent basic_number | 39*b1cdbd2cSJim Jagielski '.' basic_number number_exponent '-' basic_number | 40*b1cdbd2cSJim Jagielski '.' basic_number number_exponent '+' basic_number | 41*b1cdbd2cSJim Jagielski 42*b1cdbd2cSJim Jagielski basic_number '.' number_exponent basic_number | 43*b1cdbd2cSJim Jagielski basic_number '.' number_exponent '-' basic_number | 44*b1cdbd2cSJim Jagielski basic_number '.' number_exponent '+' basic_number | 45*b1cdbd2cSJim Jagielski 46*b1cdbd2cSJim Jagielski basic_number '.' basic_number number_exponent basic_number | 47*b1cdbd2cSJim Jagielski basic_number '.' basic_number number_exponent '-' basic_number | 48*b1cdbd2cSJim Jagielski basic_number '.' basic_number number_exponent '+' basic_number 49*b1cdbd2cSJim Jagielski 50*b1cdbd2cSJim Jagielski 51*b1cdbd2cSJim Jagielskiidentifier = '$'|'pi'|'e'|'X'|'Y'|'Width'|'Height' 52*b1cdbd2cSJim Jagielski ^ ^ ^ ^ ^ 53*b1cdbd2cSJim Jagielski | | | | | 54*b1cdbd2cSJim Jagielski '$' in PPT | | | | 55*b1cdbd2cSJim Jagielski '#ppt_x' in PPT | | | 56*b1cdbd2cSJim Jagielski '#ppt_y' in PPT | | 57*b1cdbd2cSJim Jagielski '#ppt_w' in PPT | 58*b1cdbd2cSJim Jagielski '#ppt_h' in PPT 59*b1cdbd2cSJim Jagielski 60*b1cdbd2cSJim Jagielskiunary_function = 'abs'|'sqrt'|'sin'|'cos'|'tan'|'atan'|'acos'|'asin'|'exp'|'log' 61*b1cdbd2cSJim Jagielskibinary_function = 'min'|'max' 62*b1cdbd2cSJim Jagielski 63*b1cdbd2cSJim Jagielski 64*b1cdbd2cSJim Jagielskibasic_expression = 65*b1cdbd2cSJim Jagielski number | 66*b1cdbd2cSJim Jagielski identifier | 67*b1cdbd2cSJim Jagielski unary_function '(' additive_expression ')' | 68*b1cdbd2cSJim Jagielski binary_function '(' additive_expression ',' additive_expression ')' | 69*b1cdbd2cSJim Jagielski '(' additive_expression ')' 70*b1cdbd2cSJim Jagielski 71*b1cdbd2cSJim Jagielskiunary_expression = '-' basic_expression 72*b1cdbd2cSJim Jagielski 73*b1cdbd2cSJim Jagielskimultiplicative_expression = 74*b1cdbd2cSJim Jagielski basic_expression | 75*b1cdbd2cSJim Jagielski multiplicative_expression '*' basic_expression | 76*b1cdbd2cSJim Jagielski multiplicative_expression '/' basic_expression 77*b1cdbd2cSJim Jagielski 78*b1cdbd2cSJim Jagielskiadditive_expression = 79*b1cdbd2cSJim Jagielski multiplicative_expression | 80*b1cdbd2cSJim Jagielski additive_expression '+' multiplicative_expression | 81*b1cdbd2cSJim Jagielski additive_expression '-' multiplicative_expression 82*b1cdbd2cSJim Jagielski 83