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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

This commit is contained in:
Arash Partow 2012-05-04 21:24:14 +10:00
parent d7b199bdbd
commit 386e3e19d1
3 changed files with 454 additions and 443 deletions
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866
exprtk.hpp
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File diff suppressed because it is too large Load Diff

13
exprtk_test.cpp
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@ -814,8 +814,8 @@ inline bool run_test01()
test_xy<T>("2x + 3y == 2*x + 3*y" ,T(2.0),T(3.0),T(1.0)),
test_xy<T>("2(x + y) == 2*x + 2*y" ,T(2.0),T(3.0),T(1.0)),
test_xy<T>(" (x + y)3 == 3*x + 3*y" ,T(2.0),T(3.0),T(1.0)),
test_xy<T>("(x+y^3/7) == (x+(y*y*y)/7)",T(2.0),T(3.0),T(1.0)),
test_xy<T>("(1-x^3+y^2*7) == (1-(x*x*x)+(y*y)*7)",T(2.0),T(3.0),T(1.0)),
test_xy<T>("equal(x+y^3/7,x+(y*y*y)/7)",T(2.0),T(3.0),T(1.0)),
test_xy<T>("equal(1-x^3+y^2*7,1-(x*x*x)+(y*y)*7)",T(2.0),T(3.0),T(1.0)),
test_xy<T>("equal( x^0,1)",T(12.34),T(0.0),T(1.0)),
test_xy<T>("equal( x^1,x)",T(12.34),T(0.0),T(1.0)),
test_xy<T>("equal( x^2,x*x)",T(12.34),T(0.0),T(1.0)),
@ -1615,6 +1615,9 @@ inline bool run_test10()
}
};
static const std::size_t rounds = 1000;
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_variable("x", x);
symbol_table.add_variable("y", y);
@ -1684,6 +1687,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
myfunc<T> mf;
@ -1713,6 +1717,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_stringvar("i",i);
symbol_table.add_stringvar("j",j);
@ -1782,6 +1787,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_variable("x", x);
symbol_table.add_variable("y", y);
@ -1826,6 +1832,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_variable("x", x);
symbol_table.add_variable("y", y);
@ -1870,6 +1877,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_stringvar( "i", i);
symbol_table.add_stringvar( "j", j);
@ -1914,6 +1922,7 @@ inline bool run_test10()
}
}
for (std::size_t r = 0; r < rounds; ++r)
{
symbol_table.add_stringvar("i", i);
symbol_table.add_stringvar("j", j);

18
readme.txt
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@ -51,17 +51,18 @@ and the ability to evaluate strings within expressions.
(1) exprtk_disable_string_capabilities
(2) exprtk_disable_cardinal_pow_optimisation
(3) exprtk_disable_extended_optimisations
(4) exprtk_disable_extended_operator_optimizations
(1) "exprtk_disable_string_capabilities"
If defined, the macro will disable all string processing capabilities.
When defined, if an expression containing a string or string related
action is encountered, a compilation error will be raised by the
action is encountered, a compilation error will be raised by the
parser.
(2) "exprtk_disable_cardinal_pow_optimisation"
If defined, the macro will disable the special case regarding
exponentiation of a variable to an integer constant (where the
constant is <= 25). Defining this variable may be desirable if the
constant is <= 60). Defining this variable may be desirable if the
error magnitude of the results using this special case are intolerable
with regards to the precision required. When defined, the pow function
used for all other powers will be invoked.
@ -77,6 +78,19 @@ also be noted that some of the third tier optimisations are also
available through the predefined 'special functions', however these
require that expressions utilize them explicitly.
(4) "exprtk_disable_extended_operator_optimizations"
By default most of the mathematical operators are included as part of
the optimisation process. However if this macro is defined, then only
the basic mathematical operators (+,-,*,/,^) will be included.
(5) "exprtk_lean_and_mean"
The default mode of ExprTk is lean and mean. This macro encompasses
both modes [3] and [4].
(6) "exprtk_lean_and_mean_numeric_only"
The mode when this macro is defined, is 'lean and mean' coupled with
all string capabilities disabled [1].
[FILES]
(00) Makefile