50 lines
1.2 KiB
C++
50 lines
1.2 KiB
C++
/* example ex3g/ex3g.cpp
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*
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* @author Roland Conybeare, Jul 2026
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*
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* xo-ppsink port of xo-indentlog/example/ex3, slice E: code location.
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*
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* scope_config::location_enabled appends the scope's source "[file:line]"
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* (captured by XO_ENTER0_). FlatSink doesn't track a column, so it can't
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* right-align -- it falls back to placing the location inline (one space
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* after the banner). See xo-indentlog2/example/ex3g for the right-aligned
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* PrettySink version.
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*/
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#include <xo/ppsink/color.hpp>
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#include <xo/ppsink/scope.hpp>
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#include <xo/ppsink/scope_macros.hpp>
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#include <xo/ppsink/tag.hpp>
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using xo::pp::scope;
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using xo::pp::scope_config;
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using xo::pp::log_level;
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using xo::pp::tag;
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using xo::pp::xtag;
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int
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fib(int n) {
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scope log(XO_ENTER0_(info), tag("n", n));
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int retval = 1;
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if (n >= 2)
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retval = fib(n - 1) + fib(n - 2);
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log.end_scope(tag("n", n), " <-", xtag("retval", retval));
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return retval;
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}
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int
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main(int argc, char ** argv) {
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scope_config::min_log_level = log_level::info;
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scope_config::indent_width = 2;
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scope_config::location_enabled = true; /* append [file:line] (inline, FlatSink) */
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fib(3);
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return 0;
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}
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/* end ex3g.cpp */
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