Function isStartCharacter

src/Language/Java.ts:138–141

(codePoint: number)

export const stringEscape = utf16ConcatMap(escapeNonPrintableMapper(isAscii, standardUnicodeHexEscape));

function isStartCharacter(codePoint: number): boolean {
    if (codePoint === 0x5f) return true; // underscore
    return isAscii(codePoint) && isLetter(codePoint);
}

function isPartCharacter(codePoint: number): boolean {
    return isStartCharacter(codePoint) || (isAscii(codePoint) && isDigit(codePoint));