Function throwError

lib/json6.js:303–305

( leader, c )

			let retval = 0;

			function throwError( leader, c ) {
				throw new Error( `${leader} '${String.fromCodePoint( c )}' unexpected at ${n} (near '${buf.substr(n>4?(n-4):0,n>4?3:(n-1))}[${String.fromCodePoint( c )}]${buf.substr(n, 10)}') [${pos.line}:${pos.col}]`);
			}

			function RESET_VAL()  {
				val.value_type = VALUE_UNSET;