Consider the following code in C++. class string_map { string cached_key; string cached_val; const string complex_lookup(const string key); // body specified elsewhere public: const string operator [] (const string key) { if (key == cached_key) return cached_val; string rtn_val = complex_lookup (key); cached_key = key; cached_val !! %3D rtn_val; %3D return rtn_val; }; Suppose that string_map::operator[] contains the only call to complex_lookup anywhere in the program. Explain why it would be unwise for the programmer to expand that call textually in-line and eliminate the separate function.
Consider the following code in C++. class string_map { string cached_key; string cached_val; const string complex_lookup(const string key); // body specified elsewhere public: const string operator [] (const string key) { if (key == cached_key) return cached_val; string rtn_val = complex_lookup (key); cached_key = key; cached_val !! %3D rtn_val; %3D return rtn_val; }; Suppose that string_map::operator[] contains the only call to complex_lookup anywhere in the program. Explain why it would be unwise for the programmer to expand that call textually in-line and eliminate the separate function.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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![9.2 Consider the following code in C++.
class string_map {
string cached_key;
string cached_val;
const string complex_lookup(const string key);
// body specified elsewhere
public:
const string operator [] (const string key) {
if (key == cached_key) return cached_val;
string rtn_val
cached_key
complex_lookup (key);
key;
%3D
cached_val
rtn_val;
%3D
return rtn_val;
};
Suppose that string_map::operator[] contains the only call to complex_lookup
anywhere in the program. Explain why it would be unwise for the programmer
to expand that call textually in-line and eliminate the separate function.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0eeffc8d-4542-4963-851c-14fc09a64fcf%2Fe34d3099-306e-42d9-a3e4-02da5555cbb9%2Fo06js1e_processed.png&w=3840&q=75)
Transcribed Image Text:9.2 Consider the following code in C++.
class string_map {
string cached_key;
string cached_val;
const string complex_lookup(const string key);
// body specified elsewhere
public:
const string operator [] (const string key) {
if (key == cached_key) return cached_val;
string rtn_val
cached_key
complex_lookup (key);
key;
%3D
cached_val
rtn_val;
%3D
return rtn_val;
};
Suppose that string_map::operator[] contains the only call to complex_lookup
anywhere in the program. Explain why it would be unwise for the programmer
to expand that call textually in-line and eliminate the separate function.
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