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Questions tagged [string-literals]

String literals concern the syntactic representation of literal constant strings in C, C++ and others.

C and C++ have several ways to represent strings in code. They include the basic double quoted "Hello, World!". Strings can be concatenated "as" " follows". C++-0X has added new encodings u"Hello" for UTF16 (char16_t), U"world" for UTF32 (char32_t) is addition to L"long" for wchar_t. There are rules for concatenating different encodings.

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Insert text with single quotes in PostgreSQL

I have a table test(id,name). I need to insert values like: user's log, 'my user', customer's. insert into test values (1,'user's log'); insert into test values (2,''my users''); insert into test values (3,'customer's'); I am getting an error…
MAHI
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C++ multiline string literal

Is there any way to have multi-line plain-text, constant literals in C++, à la Perl? Maybe some parsing trick with #includeing a file? I can't think of one, but boy, that would be nice. I know it'll be in C++0x.
rlbond
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How to add percent sign to NSString

I want to have a percentage sign in my string after a digit. Something like this: 75%. How can I have this done? I tried: [NSString stringWithFormat:@"%d\%", someDigit]; But it didn't work for me.
Ilya Suzdalnitski
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How to split a string literal across multiple lines in C / Objective-C?

I have a pretty long sqlite query: const char *sql_query = "SELECT statuses.word_id FROM lang1_words, statuses WHERE statuses.word_id = lang1_words.word_id ORDER BY lang1_words.word ASC"; How can I break it in a number of lines to make it easier to…
Ilya Suzdalnitski
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How should I write a Windows path in a Python string literal?

Suppose I need to refer to the path C:\meshes\as. If I try writing that directly, like "C:\meshes\as", I encounter problems - either some exception, or the path just doesn't work. Is this because \ is acting as an escape character? How should I…
Gareth
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Single quotes vs. double quotes in C or C++

When should I use single quotes and double quotes in C or C++ programming?
Vishwanath Dalvi
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Difference between string object and string literal

What is the difference between String str = new String("abc"); and String str = "abc";
user395617
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python: SyntaxError: EOL while scanning string literal

I have the above-mentioned error in s1="some very long string............" Does anyone know what I am doing wrong?
Alex Gordon
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String literals: Where do they go?

I am interested in where string literals get allocated/stored. I did find one intriguing answer here, saying: Defining a string inline actually embeds the data in the program itself and cannot be changed (some compilers allow this by a smart trick,…
Chris Cooper
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What is the r#""# operator in Rust?

I saw the operator r#"" in Rust but I can't find what it does. It came in handy for creating JSON: let var1 = "test1"; let json = r#"{"type": "type1", "type2": var1}"#; println!("{}", json) // => {"type2": "type1", "type2": var1} What's the name of…
Incerteza
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How to use Macro argument as string literal?

I am trying to figure out how to write a macro that will pass both a string literal representation of a variable name along with the variable itself into a function. For example given the following function. void do_something(string name, int…
Ian
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How to define string literal union type from constants in Typescript

I know I can define string union types to restrict variables to one of the possible string values: type MyType = 'first' | 'second' let myVar:MyType = 'first' I need to construct a type like that from constant strings, e.g: const MY_CONSTANT =…
Can Poyrazoğlu
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Computing length of a C string at compile time. Is this really a constexpr?

I'm trying to compute the length of a string literal at compile time. To do so I'm using following code: #include int constexpr length(const char* str) { return *str ? 1 + length(str + 1) : 0; } int main() { printf("%d %d",…
Mircea Ispas
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"Life-time" of a string literal in C

Wouldn't the pointer returned by the following function be inaccessible? char *foo(int rc) { switch (rc) { case 1: return("one"); case 2: return("two"); default: …
user113454
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Why do (only) some compilers use the same address for identical string literals?

https://godbolt.org/z/cyBiWY I can see two 'some' literals in assembler code generated by MSVC, but only one with clang and gcc. This leads to totally different results of code execution. static const char *A = "some"; static const char *B =…
Eugene Kosov
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