Class Layout Copyright © 2020 by Stephen C. Dewhurst and Daniel Saks 1 Class Layout Steve Dewhurst Semantics Consulting, Inc. www.stevedewhurst.com 1 Copyright © 2020 by Stephen C. Dewhurst and Daniel Daniel Saks C++ Classes  Only non-static data declarations in a class definition add anything to the size of class objects. class HR { public: ~~~ void terminator(Salary *, Hourly *, Temp *); private: Stephen C. Dewhurst and Daniel Saks 1 7Class Layout Copyright © 2020 by Stephen C. Dewhurst and Daniel Saks 2 sizeof(Class Object)  sizeof applied to the HR class yields the same result as sizeof applied

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.56.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.info.settings

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.55.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.info.settings

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.54.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.info.settings

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui build_requires("gtest/0.1", force_host_context=True) Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.settings.os

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.53.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.info.settings

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.63.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.settings.os

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.64.1 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.settings.os

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui build_requires("gtest/0.1", force_host_context=True) Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.info.settings

tool_requires() to define the legacy build_requires. Listing 3: From: from conans import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.build_requires("nasm/2.15.05") self.bui migration guide to 2.0 Conan Documentation, Release 1.62.0 Listing 4: To: from conan import ConanFile class Pkg(Conanfile): ... def build_requirements(self): self.tool_requires("nasm/2.15.05") self.test_requires("gtest/0 if strictly necessary to fail fast for unsupported configurations. from conan import ConanFile class Pkg(Conanfile): settings = "os", "arch", "compiler" ... def validate(self): if self.settings.os