specialvalues_pos_of.mdx

id	keywords	name	summary	category
pos-of	pos of	__POS_OF__	This is the `__POS_OF__` special value.	specialvalues

__POS_OF__(expression) returns a tuple consisting of (position, expression), corresponding to the position of the expression you pass as a parameter here. The position is a tuple consisting of (fileName, lineNumber, columnNumberStart, columnNumberEnd).

It basically provides the same information as __LOC_OF__, but separated into multiple values.

Note: expression refers to any expression, it does not need to be a function.

<CodeTab labels={["ReScript", "JS Output"]}>

letf= () =>Nonelet (pos, f') =__POS_OF__(f) pos->Console.logf'->Console.log

functionf(param){}varpos=["testmodule.res",2,27,28];console.log(pos);console.log(f);varf$p=f;