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Add switch expression.

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Stephen Chung
2020-11-13 18:32:18 +08:00
parent 7d1b971b39
commit 55b4907f19
19 changed files with 547 additions and 252 deletions
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30
doc/src/language/dynamic.md
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@@ -12,27 +12,19 @@ Use `type_of()` to Get Value Type
Because [`type_of()`] a `Dynamic` value returns the type of the actual value,
it is usually used to perform type-specific actions based on the actual value's type.
```rust
```c
let mystery = get_some_dynamic_value();
if type_of(mystery) == "i64" {
print("Hey, I got an integer here!");
} else if type_of(mystery) == "f64" {
print("Hey, I got a float here!");
} else if type_of(mystery) == "string" {
print("Hey, I got a string here!");
} else if type_of(mystery) == "bool" {
print("Hey, I got a boolean here!");
} else if type_of(mystery) == "array" {
print("Hey, I got an array here!");
} else if type_of(mystery) == "map" {
print("Hey, I got an object map here!");
} else if type_of(mystery) == "Fn" {
print("Hey, I got a function pointer here!");
} else if type_of(mystery) == "TestStruct" {
print("Hey, I got the TestStruct custom type here!");
} else {
print("I don't know what this is: " + type_of(mystery));
switch mystery {
"i64" => print("Hey, I got an integer here!"),
"f64" => print("Hey, I got a float here!"),
"string" => print("Hey, I got a string here!"),
"bool" => print("Hey, I got a boolean here!"),
"array" => print("Hey, I got an array here!"),
"map" => print("Hey, I got an object map here!"),
"Fn" => print("Hey, I got a function pointer here!"),
"TestStruct" => print("Hey, I got the TestStruct custom type here!"),
_ => print("I don't know what this is: " + type_of(mystery))
}
```