1Parsers parsing "a* b* a*" and counting the appearance of the characters. 2This parser is implemented in three different ways: 3- One built with Metaparse 4- One implemented using constexpr functions 5- One built with Metaparse but parsing a subexpression with a constexpr parser: 6 - a* at the beginning is parsed using a Metaparse parser 7 - b* is parsed using a constexpr function 8 - a* at the end is parsed using a Mataparse parser again 9 10This example demonstrates how Metaparse can be combined with parsers using 11constexpr functions. 12 13