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C++ Mathematical Expression Library (ExprTk) https://www.partow.net/p…
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…rogramming/exprtk/index.html
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@ArashPartow
ArashPartow committed Jan 1, 2021
1 parent 93a9f44 commit 772884e
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Showing 26 changed files with 3,105 additions and 2,096 deletions.
3 changes: 3 additions & 0 deletions .circleci/config.yml
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Expand Up @@ -6,6 +6,7 @@ jobs:
- image: gcc:6
steps:
- checkout
- run: c++ --version
- run: make all -j 2
- run: ./exprtk_test

Expand All @@ -14,6 +15,7 @@ jobs:
- image: gcc:7
steps:
- checkout
- run: c++ --version
- run: make all -j 2
- run: ./exprtk_test

Expand All @@ -22,6 +24,7 @@ jobs:
- image: gcc:latest
steps:
- checkout
- run: c++ --version
- run: make all -j 2
- run: ./exprtk_test

Expand Down
2 changes: 1 addition & 1 deletion Makefile
View file
Expand Up @@ -2,7 +2,7 @@
# **************************************************************
# * C++ Mathematical Expression Toolkit Library *
# * *
# * Author: Arash Partow (1999-2020) *
# * Author: Arash Partow (1999-2021) *
# * URL: http://www.partow.net/programming/exprtk/index.html *
# * *
# * Copyright notice: *
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4,161 changes: 2,292 additions & 1,869 deletions exprtk.hpp
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8 changes: 4 additions & 4 deletions exprtk_benchmark.cpp
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Expand Up @@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* ExprTk vs Native Benchmarks *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
Expand Down Expand Up @@ -150,7 +150,7 @@ template <typename T>
bool run_parse_benchmark(exprtk::symbol_table<T>& symbol_table)
{
static const std::size_t rounds = 100000;
exprtk::parser<double> parser;
exprtk::parser<double> parser;
exprtk::expression<double> expression;

expression.register_symbol_table(symbol_table);
Expand Down Expand Up @@ -431,8 +431,8 @@ void perform_file_based_benchmark(const std::string& file_name, const std::size_
}

typedef exprtk::symbol_table<double> symbol_table_t;
typedef exprtk::expression<double> expression_t;
typedef exprtk::parser<double> parser_t;
typedef exprtk::expression<double> expression_t;
typedef exprtk::parser<double> parser_t;

std::deque<expression_t> expression_list;

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212 changes: 211 additions & 1 deletion exprtk_functional_test.txt
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Expand Up @@ -8093,4 +8093,214 @@ equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := 2 * abs((1 + xx) + (yy
equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := abs((xx + 1) + (yy + 1)) * 2; sum(xx) == 10^6},true)
equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := abs((1 + xx) + (1 + yy)) * 2; sum(xx) == 10^6},true)
equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := abs((xx + 1) + (1 + yy)) * 2; sum(xx) == 10^6},true)
equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := abs((1 + xx) + (yy + 1)) * 2; sum(xx) == 10^6},true)
equal(~{var xx[10^5] := [-3]; var yy[10^5] := [-4]; xx := abs((1 + xx) + (yy + 1)) * 2; sum(xx) == 10^6},true)
equal('abcd' like 'abcd*' ,true )
equal('abcd' like 'abc*' ,true )
equal('abcd' like 'ab*' ,true )
equal('abcd' like 'a*' ,true )
equal('abcd' like 'abcd?' ,true )
equal('abcd' like 'abc?' ,true )
equal('abcd' like 'abc??' ,true )
equal('abcd' like 'ab???' ,true )
equal('abcd' like 'a????' ,true )
equal('abcd' like '?????' ,true )
equal('a' like 'a*' ,true )
equal('ab' like 'a*' ,true )
equal('abcd' like 'abcd*' ,true )
equal('' like '' ,true )
equal('abcd' like 'abcd' ,true )
equal('abcd' like 'abc*' ,true )
equal('abcd' like '*bcd' ,true )
equal('abcd' like 'abc?' ,true )
equal('abcd' like '?bcd' ,true )
equal('abcd' like 'ab?d' ,true )
equal('abcd' like 'ab*d' ,true )
equal('abcd' like 'a?cd' ,true )
equal('abcd' like 'a*cd' ,true )
equal('abcd' like 'a??d' ,true )
equal('abcd' like 'a*?d' ,true )
equal('abcd' like '*bc*' ,true )
equal('abcd' like '?bc?' ,true )
equal('abcd' like '????' ,true )
equal('abcd' like 'a???' ,true )
equal('abcd' like 'ab??' ,true )
equal('abcd' like 'abc?' ,true )
equal('abcd' like '???d' ,true )
equal('abcd' like '??cd' ,true )
equal('abcd' like '?bcd' ,true )
equal('abcd' like '?b?d' ,true )
equal('abcd' like 'a?c?' ,true )
equal('abcd' like 'a??d' ,true )
equal('abcd' like '?bc?' ,true )
equal('abcd' like 'ab**' ,true )
equal('abcd' like 'ab*?' ,true )
equal('abcd' like 'a***' ,true )
equal('abcd' like '**cd' ,true )
equal('abcd' like '*?cd' ,true )
equal('abcd' like '***d' ,true )
equal('abcd' like '?*?d' ,true )
equal('abcd' like '?*?d' ,true )
equal('abcd' like '*bc*' ,true )
equal('abcd' like '*bc?' ,true )
equal('abcd' like '*b??' ,true )
equal('abcd' like '?bc*' ,true )
equal('abcd' like '??c*' ,true )
equal('abcd' like '*b?*' ,true )
equal('abcd' like '*b*d' ,true )
equal('abcd' like 'a*c*' ,true )
equal('abcd' like '?*cd' ,true )
equal('abcd' like 'ab?*' ,true )
equal('abcd' like 'ab*?' ,true )
equal('abcd' like 'a?*d' ,true )
equal('ab' like 'a*' ,true )
equal('ab' like 'a?' ,true )
equal('a' like 'a*' ,true )
equal('a' like 'a?' ,true )
equal('xalabcd' like '*abcd*' ,true )
equal('xablabcd' like '*abcd*' ,true )
equal('xabclabcd' like '*abcd*' ,true )
equal('aaaaa' like '*aa?' ,true )
equal('abcd' like 'xyzw' ,false)
equal('abcd' like 'xyz' ,false)
equal('abc' like 'xyzw' ,false)
equal('abcd' like 'ab?' ,false)
equal('abcd' like 'a?' ,false)
equal('abcd' ilike 'abcd*' ,true )
equal('abcd' ilike 'abc*' ,true )
equal('abcd' ilike 'ab*' ,true )
equal('abcd' ilike 'a*' ,true )
equal('abcd' ilike 'abcd?' ,true )
equal('abcd' ilike 'abc?' ,true )
equal('abcd' ilike 'abc??' ,true )
equal('abcd' ilike 'ab???' ,true )
equal('abcd' ilike 'a????' ,true )
equal('abcd' ilike '?????' ,true )
equal('a' ilike 'a*' ,true )
equal('ab' ilike 'a*' ,true )
equal('abcd' ilike 'abcd*' ,true )
equal('' ilike '' ,true )
equal('abcd' ilike 'abcd' ,true )
equal('abcd' ilike 'abc*' ,true )
equal('abcd' ilike '*bcd' ,true )
equal('abcd' ilike 'abc?' ,true )
equal('abcd' ilike '?bcd' ,true )
equal('abcd' ilike 'ab?d' ,true )
equal('abcd' ilike 'ab*d' ,true )
equal('abcd' ilike 'a?cd' ,true )
equal('abcd' ilike 'a*cd' ,true )
equal('abcd' ilike 'a??d' ,true )
equal('abcd' ilike 'a*?d' ,true )
equal('abcd' ilike '*bc*' ,true )
equal('abcd' ilike '?bc?' ,true )
equal('abcd' ilike '????' ,true )
equal('abcd' ilike 'a???' ,true )
equal('abcd' ilike 'ab??' ,true )
equal('abcd' ilike 'abc?' ,true )
equal('abcd' ilike '???d' ,true )
equal('abcd' ilike '??cd' ,true )
equal('abcd' ilike '?bcd' ,true )
equal('abcd' ilike '?b?d' ,true )
equal('abcd' ilike 'a?c?' ,true )
equal('abcd' ilike 'a??d' ,true )
equal('abcd' ilike '?bc?' ,true )
equal('abcd' ilike 'ab**' ,true )
equal('abcd' ilike 'ab*?' ,true )
equal('abcd' ilike 'a***' ,true )
equal('abcd' ilike '**cd' ,true )
equal('abcd' ilike '*?cd' ,true )
equal('abcd' ilike '***d' ,true )
equal('abcd' ilike '?*?d' ,true )
equal('abcd' ilike '?*?d' ,true )
equal('abcd' ilike '*bc*' ,true )
equal('abcd' ilike '*bc?' ,true )
equal('abcd' ilike '*b??' ,true )
equal('abcd' ilike '?bc*' ,true )
equal('abcd' ilike '??c*' ,true )
equal('abcd' ilike '*b?*' ,true )
equal('abcd' ilike '*b*d' ,true )
equal('abcd' ilike 'a*c*' ,true )
equal('abcd' ilike '?*cd' ,true )
equal('abcd' ilike 'ab?*' ,true )
equal('abcd' ilike 'ab*?' ,true )
equal('abcd' ilike 'a?*d' ,true )
equal('ab' ilike 'a*' ,true )
equal('ab' ilike 'a?' ,true )
equal('a' ilike 'a*' ,true )
equal('a' ilike 'a?' ,true )
equal('xalabcd' ilike '*abcd*',true )
equal('xablabcd' ilike '*abcd*',true )
equal('xabclabcd' ilike '*abcd*',true )
equal('aaaaa' ilike '*aa?' ,true )
equal('abcd' ilike 'xyzw' ,false)
equal('abcd' ilike 'xyz' ,false)
equal('abc' ilike 'xyzw' ,false)
equal('abcd' ilike 'ab?' ,false)
equal('abcd' ilike 'a?' ,false)
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n < m) 'n < m'; else 'n >= m'; }; (s == 'n < m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n > m) 'n <= m'; else 'n > m'; }; (s == 'n > m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n < m) 'n < m'; else 'n >' + '= m'; }; (s == 'n < m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n < m) 'n ' + '< m'; else 'n >= m'; }; (s == 'n < m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n > m) 'n <= m'; else 'n ' + '> m'; }; (s == 'n > m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; if (n > m) 'n <' + '= m'; else 'n > m'; }; (s == 'n > m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; var r0 := 'n < m'; var r1 := 'n >= m'; if (n < m) r0; else r1; }; (s == 'n < m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; var r0 := 'n < m'; var r1 := 'n >= m'; if (n < m) r0 + ''; else r1 + ''; }; (s == 'n < m')})
equal(true, ~{var s := ~{var n := 1; var m := 2; var r0 := 'n < m'; var r1 := 'n >= m'; if (n < m) '' + r0; else '' + r1; }; (s == 'n < m')})
equal(111,~{var n:=1; switch { case n > 0: 111; default: 222; }})
equal(222,~{var n:=0; switch { case n > 0: 111; default: 222; }})
equal(111,~{var n:=0; switch { case true : 111; default: 222; }})
equal(222,~{var n:=0; switch { case false: 111; default: 222; }})
equal(111,~{var n:=1; switch { default: 222; case n > 0: 111; }})
equal(222,~{var n:=0; switch { default: 222; case n > 0: 111; }})
equal(111,~{var n:=0; switch { default: 222; case true : 111; }})
equal(222,~{var n:=0; switch { default: 222; case false: 111; }})
equal(111,~{var n:=1; switch { case n == 1: 111; case n == 2: 222; default: 333; }})
equal(111,~{var n:=1; switch { case n == 1: 111; default: 333; case n == 2: 222; }})
equal(111,~{var n:=1; switch { default: 333; case n == 1: 111; case n == 2: 222; }})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; if (1 < 2, v0, v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; if (1 > 2, v0, v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; if (1 < 2, v0 - v1, v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; if (1 > 2, v0 - v1, v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; if (x_ < y_, v0, v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; if (x_ > y_, v0, v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; if (x_ < y_, v0 - v1, v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; if (x_ > y_, v0 - v1, v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; if (1 < 2, v0, v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; if (1 > 2, v0, v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; if (1 < 2, v0 - v1, v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; if (1 > 2, v0 - v1, v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; if (x_ < y_, v0, v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; if (x_ > y_, v0, v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; if (x_ < y_, v0 - v1, v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; if (x_ > y_, v0 - v1, v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; (if (1 < 2) v0; else v1;) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; (if (1 > 2) v0; else v1;) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; (if (1 < 2) v0 - v1; else v1 - v0;) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; (if (1 > 2) v0 - v1; else v1 - v0;) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; (if (x_ < y_) v0; else v1;) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; (if (x_ > y_) v0; else v1;) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; (if (x_ < y_) v0 - v1; else v1 - v0;) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; (if (x_ > y_) v0 - v1; else v1 - v0;) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; (if (1 < 2) v0; else v1;) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; (if (1 > 2) v0; else v1;) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; (if (1 < 2) v0 - v1; else v1 - v0;) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; (if (1 > 2) v0 - v1; else v1 - v0;) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; (if (x_ < y_) v0; else v1;) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; (if (x_ > y_) v0; else v1;) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; (if (x_ < y_) v0 - v1; else v1 - v0;) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; (if (x_ > y_) v0 - v1; else v1 - v0;) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; ((1 < 2) ? v0 : v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; ((1 > 2) ? v0 : v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; ((1 < 2) ? v0 - v1 : v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; ((1 > 2) ? v0 - v1 : v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; ((x_ < y_) ? v0 : v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; ((x_ > y_) ? v0 : v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; ((x_ < y_) ? v0 - v1 : v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[3] := {7,8,9}; var x_ := 1; var y_ := 2; ((x_ > y_) ? v0 - v1 : v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; ((1 < 2) ? v0 : v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; ((1 > 2) ? v0 : v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; ((1 < 2) ? v0 - v1 : v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; ((1 > 2) ? v0 - v1 : v1 - v0) == (v1 - v0)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; ((x_ < y_) ? v0 : v1) == v0})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; ((x_ > y_) ? v0 : v1) == v1})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; ((x_ < y_) ? v0 - v1 : v1 - v0) == (v0 - v1)})
equal(true,~{var v0[3] := {1,2,3}; var v1[4] := {6,7,8,9}; var x_ := 1; var y_ := 2; ((x_ > y_) ? v0 - v1 : v1 - v0) == (v1 - v0)})
6 changes: 3 additions & 3 deletions exprtk_simple_example_01.cpp
View file
Expand Up @@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 1 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
Expand All @@ -26,8 +26,8 @@ template <typename T>
void trig_function()
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;

const std::string expression_string =
"clamp(-1.0,sin(2 * pi * x) + cos(x / 2 * pi),+1.0)";
Expand Down
6 changes: 3 additions & 3 deletions exprtk_simple_example_02.cpp
View file
Expand Up @@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 2 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
Expand All @@ -26,8 +26,8 @@ template <typename T>
void square_wave()
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;

const std::string expr_string =
"a*(4/pi)*"
Expand Down
6 changes: 3 additions & 3 deletions exprtk_simple_example_03.cpp
View file
Expand Up @@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 3 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
Expand All @@ -26,8 +26,8 @@ template <typename T>
void polynomial()
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;

const std::string expression_string =
"25x^5 - 35x^4 - 15x^3 + 40x^2 - 15x + 1";
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12 changes: 6 additions & 6 deletions exprtk_simple_example_04.cpp
View file
Expand Up @@ -3,7 +3,7 @@
* C++ Mathematical Expression Toolkit Library *
* *
* Simple Example 4 *
* Author: Arash Partow (1999-2020) *
* Author: Arash Partow (1999-2021) *
* URL: http://www.partow.net/programming/exprtk/index.html *
* *
* Copyright notice: *
Expand All @@ -25,11 +25,11 @@
template <typename T>
void fibonacci()
{
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::function_compositor<T> compositor_t;
typedef typename compositor_t::function function_t;
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
typedef exprtk::function_compositor<T> compositor_t;
typedef typename compositor_t::function function_t;

compositor_t compositor;

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