Description
Here is a small example which fails to run as expected:
#include <iostream>
#include <map>
#include <jinja2cpp/template.h>
#include <jinja2cpp/template_env.h>
int main(int argc, char *argv[])
{
jinja2::TemplateEnv tplEnv;
tplEnv.AddGlobal("global_var", jinja2::Value("foo"));
{
jinja2::Template tpl(&tplEnv);
tpl.Load("Hello {{ global_var }}!!!");
std::string result = tpl.RenderAsString(jinja2::ValuesMap{}).value();
std::cout << result << std::endl;
}
{
jinja2::Template tpl(&tplEnv);
tpl.Load("Hello {{ global_var }}!!!");
std::string result = tpl.RenderAsString(jinja2::ValuesMap{}).value();
std::cout << result << std::endl;
}
return 0;
}The output is:
Hello foo!!!
Hello !!!
I displayed the content of the Globals before and after the first rendering, using that code:
tplEnv.ApplyGlobals([](jinja2::ValuesMap &map) {
for (const auto& [key, val] : map) {
std::cout << "-> tplenv " << key << " " << val.asString() << std::endl;
}
});Here is the result:
-> tplenv global_var foo
Hello foo!!!
-> tplenv global_var
Hello !!!
So, something is removing the content of the global vars, which is annoying because currently it means that globals have to be "reloaded" before a call to Render...
Note that MakeCallable globals are still present and working after a call to Render:
#include <iostream>
#include <map>
#include <jinja2cpp/template.h>
#include <jinja2cpp/template_env.h>
#include <jinja2cpp/user_callable.h>
int main(int argc, char *argv[])
{
jinja2::TemplateEnv tplEnv;
tplEnv.AddGlobal("global_var", jinja2::Value("foo"));
tplEnv.AddGlobal("global_fn", jinja2::MakeCallable([]() { return "bar"; }));
{
jinja2::Template tpl(&tplEnv);
tpl.Load("Hello {{ global_var }} {{ global_fn() }}!!!");
std::string result = tpl.RenderAsString(jinja2::ValuesMap{}).value();
std::cout << result << std::endl;
}
{
jinja2::Template tpl(&tplEnv);
tpl.Load("Hello {{ global_var }} {{ global_fn() }}!!!");
std::string result = tpl.RenderAsString(jinja2::ValuesMap{}).value();
std::cout << result << std::endl;
}
return 0;
}returns:
Hello foo bar!!!
Hello bar!!!