Function

substring(_:_:_:)

Extracts a substring from a string.

func substring(_ string: any EcoreValue, _ start: any EcoreValue, _ end: any EcoreValue) throws -> EString

Parameters

string: The source string
start: The starting index (1-based, inclusive)
end: The ending index (1-based, exclusive)

Return Value

The extracted substring

Discussion

The substring operation returns a portion of the original string, starting at the specified start index and ending before the end index. Indices are 1-based as per OCL specification.

Examples

let text = "Hello World" as EString
let sub = try substring(text, 1, 5)  // Result: "Hell"
let sub2 = try substring(text, 7, 12)  // Result: "World"