A Tour of C++ by Bjarne Stroustrup

Author:Bjarne Stroustrup
Language: eng
Format: epub, pdf
Publisher: Pearson Education
Published: 2018-03-13T16:00:00+00:00

9.5 Advice

[1] Use std::string to own character sequences; §9.2; [CG: SL.str.1].

[2] Prefer string operations to C-style string functions; §9.1.

[3] Use string to declare variables and members rather than as a base class; §9.2.

[4] Return strings by value (rely on move semantics); §9.2, §9.2.1.

[5] Directly or indirectly, use substr() to read substrings and replace() to write substrings; §9.2.

[6] A string can grow and shrink, as needed; §9.2.

[7] Use at() rather than iterators or [ ] when you want range checking; §9.2.

[8] Use iterators and [ ] rather than at() when you want to optimize speed; §9.2.

[9] string input doesn’t overflow; §9.2, §10.3.

[10] Use c_str() to produce a C-style string representation of a string (only) when you have to; §9.2.

[11] Use a stringstream or a generic value extraction function (such as to<X>) for numeric conversion of strings; §10.8.

[12] A basic_string can be used to make strings of characters on any type; §9.2.1.

[13] Use the s suffix for string literals meant to be standard-library strings; §9.3 [CG: SL.str.12].

[14] Use string_view as an argument of functions that needs to read character sequences stored in various ways; §9.3 [CG: SL.str.2].

[15] Use gsl::string_span as an argument of functions that needs to write character sequences stored in various ways; §9.3. [CG: SL.str.2] [CG: SL.str.11].

[16] Think of a string_view as a kind of pointer with a size attached; it does not own its characters; §9.3.

[17] Use the sv suffix for string literals meant to be standard-library string_views; §9.3.

[18] Use regex for most conventional uses of regular expressions; §9.4.

[19] Prefer raw string literals for expressing all but the simplest patterns; §9.4.

[20] Use regex_match() to match a complete input; §9.4, §9.4.2.

[21] Use regex_search() to search for a pattern in an input stream; §9.4.1.

[22] The regular expression notation can be adjusted to match various standards; §9.4.2.

[23] The default regular expression notation is that of ECMAScript; §9.4.2.

[24] Be restrained; regular expressions can easily become a write-only language; §9.4.2.

[25] Note that \i allows you to express a subpattern in terms of a previous subpattern; §9.4.2.

[26] Use ? to make patterns “lazy”; §9.4.2.

[27] Use regex_iterators for iterating over a stream looking for a pattern; §9.4.3.

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