make_expression.md

jsoncons::jmespath::make_expression

#include <jsoncons_ext/jmespath/jmespath.hpp>

template <typename Json>
jmespath_expression<Json> make_expression(const json::string_view_type& expr);        (until 1.0.0)
                                                                                 (1)
template <typename Json>
jmespath_expression<Json> make_expression(const Json::string_view_type& expr,         (since 1.0.0)
    const custom_functions<Json>& funcs = custom_functions<Json>());

template <typename Json>
jmespath_expression<Json> make_expression(const json::string_view_type& expr,    (2)
    std::error_code& ec);                                                        

template <typename Json>
jmespath_expression<Json> make_expression(const Json::string_view_type& expr,    (3)   (since 1.0.0)  
    const custom_functions<Json>& funcs,
    std::error_code& ec)

Returns a compiled JMESPath expression for later evaluation.

Parameters

expr	JMESPath expression
funcs	Custom functions
ec	out-parameter for reporting errors in the non-throwing overload

Return value

Returns a jmespath_expression object that represents the JMESPath expression.

Exceptions

(1) Throws a jmespath_error if JMESPath compilation fails.

(2) Sets the out-parameter ec to the jmespath_error_category if JMESPath compilation fails.