A switch()-like statement whose cases are string literals.
Declared in <llvm/ADT/StringSwitch.h>
template<
typename T,
typename R = T>
class StringSwitch;The StringSwitch class is a simple form of a switch() statement that determines whether the given string matches one of the given string literals. The template type parameter T is the type of the value that will be returned from the string-switch expression. For example, the following code switches on the name of a color in argv[i]
Color color = StringSwitch<Color>(argv[i])
.Case("red", Red)
.Case("orange", Orange)
.Case("yellow", Yellow)
.Case("green", Green)
.Case("blue", Blue)
.Case("indigo", Indigo)
.Cases({"violet", "purple"}, Violet)
.Default(UnknownColor);
When multiple matches are found, the value of the first match is returned.
| Name | Description |
|---|---|
StringSwitch [constructor] | Constructors |
operator= | Assignment operators |
Case | Match if the subject equals S (case-sensitive) and bind Value. |
CaseLower | Match if the subject equals S (case-insensitive) and bind Value. |
Cases | Match if the subject equals any of CaseStrings and bind Value. |
CasesLower | Match if the subject equals any of CaseStrings case-insensitively. |
Default | Return the matched value, or Value if no case matched. |
DefaultUnreachable | Declare default as unreachable, making sure that all cases were handled. |
EndsWith | Match if the subject ends with S (case-sensitive) and bind Value. |
EndsWithLower | Match if the subject ends with S (case-insensitive) and bind Value. |
Predicate | Match if predicate Pred returns true for the subject and bind Value. |
StartsWith | Match if the subject starts with S (case-sensitive) and bind Value. |
StartsWithLower | Match if the subject starts with S (case-insensitive) and bind Value. |
operator R | Convert to R by returning the match, or abort if none matched. |