Main issues will be discussed in more detail in the chapter For each environment, the language features and their properties Scoping and allocation issues; 2) Nature of procedure calls, B)Parameter passing mechanisms Focus on the general structure of the environment Note The compiler can only maintain an environment only indirectly It must generate code to perform the necessary maintenance operations during program execution• Main issues will be discussed in more detail in the chapter: – For each environment, the language features and their properties (1) Scoping and allocation issues; (2) Nature of procedure calls; (3) Parameter passing mechanisms • Focus on the general structure of the environment • Note: – The compiler can only maintain an environment only indirectly – It must generate code to perform the necessary maintenance operations during program execution