An example of applying variadic templates to C code
summary
Shows replacing repetitive SQLite bind calls for inserting rows into Student and Teacher tables (Teacher example has three columns) by using variadic templates to collect arguments and either a recursive pack expansion or a single-line parameter pack trick. Demonstrates migrating the recursive binds to a one-line expansion that returns a throwaway initializer and then to a C++17 fold expression version with no byproduct. Code compiles and the example works with the C-style SQLite API.
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