matheval::detail::eval_ast< real_t > Class Template Reference

Evaluate the Abstract Syntax Tree. More...

#include <matheval.hpp>

Collaboration diagram for matheval::detail::eval_ast< real_t >:

Public Types
using	result_type = real_t
	Necessary typedef for boost::apply_visitor.
using	symbol_table_t = std::map<std::string, result_type>
	Type of the symbol table.

Public Member Functions
	eval_ast (symbol_table_t sym)
	Constructor.
result_type	operator() (nil) const
	Empty nodes in the tree evaluate to 0.
result_type	operator() (result_type n) const
	Numbers evaluate to themselves.
result_type	operator() (std::string const &c) const
	Variables evaluate to their value in the symbol table.
result_type	operator() (expr_ast< real_t > const &ast) const
	Recursively evaluate the AST.
result_type	operator() (binary_op< real_t > const &tree) const
	Evaluate a binary operator and optionally recurse its operands.
result_type	operator() (unary_op< real_t > const &tree) const
	Evaluate a unary operator and optionally recurse its operand.

Private Attributes
symbol_table_t	st

Detailed Description

template<typename real_t>
class matheval::detail::eval_ast< real_t >

Evaluate the Abstract Syntax Tree.

This visits all the variants of the AST and applies the stored operators.

Definition at line 209 of file matheval.hpp.

Member Typedef Documentation

result_type

template<typename real_t>

using matheval::detail::eval_ast< real_t >::result_type = real_t

Necessary typedef for boost::apply_visitor.

Definition at line 213 of file matheval.hpp.

symbol_table_t

template<typename real_t>

using matheval::detail::eval_ast< real_t >::symbol_table_t = std::map<std::string, result_type>

Type of the symbol table.

Definition at line 216 of file matheval.hpp.

Constructor & Destructor Documentation

eval_ast()

template<typename real_t>

matheval::detail::eval_ast< real_t >::eval_ast ( symbol_table_t sym )

inlineexplicit

Constructor.

Saves the symbol table to apply variables.

Definition at line 222 of file matheval.hpp.

References st.

Member Function Documentation

operator()() [1/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( binary_op< real_t > const & tree ) const

inline

Evaluate a binary operator and optionally recurse its operands.

Definition at line 247 of file matheval.hpp.

References matheval::detail::binary_op< real_t >::lhs, matheval::detail::binary_op< real_t >::op, and matheval::detail::binary_op< real_t >::rhs.

operator()() [2/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( expr_ast< real_t > const & ast ) const

inline

Recursively evaluate the AST.

Definition at line 241 of file matheval.hpp.

References matheval::detail::expr_ast< real_t >::tree.

operator()() [3/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( nil ) const

inline

Empty nodes in the tree evaluate to 0.

Definition at line 225 of file matheval.hpp.

operator()() [4/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( result_type n ) const

inline

Numbers evaluate to themselves.

Definition at line 228 of file matheval.hpp.

operator()() [5/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( std::string const & c ) const

inline

Variables evaluate to their value in the symbol table.

Definition at line 231 of file matheval.hpp.

References c, and st.

operator()() [6/6]

template<typename real_t>

result_type matheval::detail::eval_ast< real_t >::operator() ( unary_op< real_t > const & tree ) const

inline

Evaluate a unary operator and optionally recurse its operand.

Definition at line 256 of file matheval.hpp.

References matheval::detail::unary_op< real_t >::op, and matheval::detail::unary_op< real_t >::rhs.

Member Data Documentation

st

template<typename real_t>

symbol_table_t matheval::detail::eval_ast< real_t >::st

private

Definition at line 264 of file matheval.hpp.

Referenced by eval_ast(), and operator()().

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The documentation for this class was generated from the following file:

• matheval.hpp