uCalc API Version: 5.7.0-preview.1 Released: 7/30/2026

Warning

uCalc API Preview Release Notice:This preview documentation describes the intended behavior of the API. It is not fully accurate or complete.The current preview build contains incomplete features, unoptimized performance, and is subject to breaking changes.Use of the preview version in your production code is not recommended.

ContextSwitch(Tokens, string, int32, string, int32)

Method

Product: 

Transformer Library

Class: 

Tokens

Sets a token pattern that will cause a temporary switch to another token list with configurable insertion points

Syntax

ContextSwitch(Tokens, string, int32, string, int32)

Parameters

OtherTokenGroup
Tokens
Other token list to switch to
StartToken
string
Regex pattern that triggers the context switch
InsertionPointA
int32
(Default = -1)
Where in the token list to insert the new token
EndToken
string
(Default = "")
Regex pattern that causes a return to the original token list
InsertionPointB
int32
(Default = -1)
Where in the other token list (a copy of it) to insert the ending token

Return

Tokens

Current token list

Remarks

[revisit]This causes a context switch to happen when a given token pattern is reached. This is useful for instance if are parsing source code, and you want comments to be parsed based on a different set of tokens from the rest of the code.

This version of the function lets you decide where in the token list to insert the context switching token.

Examples