CPPCON 2020 / CPPCON 2020 / MACRO-FREE TESTING MACRO-FREE TESTING WITH C++20 WITH C++20 | | | | HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 HTTPS://BOOST-EXT.GITHUB.IO/UT/CPPCON-2020 KRIS@JUSIAK SINGLE (2K LOC) WITH NO EXTERNAL DEPENDENCIES (2K LOC) WITH NO EXTERNAL DEPENDENCIES MACRO-FREE (✔ ) MACRO-FREE (✔ ) (*) LIMITATIONS MAY APPLY (*) LIMITATIONS MAY APPLY HTTPS://GITHUB.COM/BOOST-EXT/UT SINGLE (2K LOC) WITH NO EXTERNAL DEPENDENCIES (2K LOC) WITH NO EXTERNAL DEPENDENCIES MACRO-FREE (✔ ) MACRO-FREE (✔ ) FEATURES ( FEATURES ( , , , , , , , , , , , , , , ) (*) LIMITATIONS MAY

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS

Communication and synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . 302 24.4 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 24.5 Atomic Operations . For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loop over A, computing 2a^2 + sin(a) for each element a of possible to create a view into a string using the type SubString. More simply, using the @views macro on a block of code converts all string slices into substrings. For example: julia> str = "long string"

Communication and synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . 302 24.4 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303 24.5 Atomic Operations . For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loop over A, computing 2a^2 + sin(a) for each element a of possible to create a view into a string using the type SubString. More simply, using the @views macro on a block of code converts all string slices into substrings. For example: julia> str = "long string"

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loop over A, computing 2a^2 + sin(a) for each element a of

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323 25.3 The @threads Macro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324 25.4 Communication and data-races or setrounding and @big_str, the macro used for big string literals (such as big"0.3"), might not be intuitive, as a consequence of the fact that @big_str is a macro. See the @big_str documentation for For example, if you compute 2 .* A.^2 .+ sin.(A) (or equivalently @. 2A^2 + sin(A), using the @. macro) for an array A, it performs a single loopCHAPTER 6. MATHEMATICAL OPERATIONS AND ELEMENTARY FUNCTIONS