_makeError

private fn

JsonError _makeError(const(char)[]  src,
       const  size_t line,
       const  size_t column,
       const  size_t index,
       const  JsonErrorCode code,
       const  string msg)

@safe

Build a structured error with a context window.

This function creates a JsonError with position information and a human-readable message that includes a source excerpt showing where the error occurred.

Parameters

`src`	The source input buffer.
`line`	1-based line number where the error occurred.
`column`	1-based column number where the error occurred.
`index`	0-based byte offset into the original input.
`code`	Machine-readable error category.
`msg`	Base error message.

Returns

A JsonError struct with all fields populated.