Function parseInfix

src/parser/syntaxes/expressions.ts:93–165

(s: ITokenStream, left: Ast.Expression, minBp: number)

}

function parseInfix(s: ITokenStream, left: Ast.Expression, minBp: number): Ast.Expression {
	const startPos = s.getPos();
	const op = s.getTokenKind();
	s.next();

	// 改行のエスケープ
	if (s.is(TokenKind.BackSlash)) {
		s.next();
		s.expect(TokenKind.NewLine);
		s.next();
	}

	if (op === TokenKind.Dot) {
		const name = parseObjectKey(s);
		s.next();

		return NODE('prop', {
			target: left,
			name,
		}, startPos, s.getPos());
	} else {
		const right = parsePratt(s, minBp);
		const endPos = s.getPos();

		switch (op) {
			case TokenKind.Hat: {
				return NODE('pow', { left, right }, startPos, endPos);
			}
			case TokenKind.Asterisk: {
				return NODE('mul', { left, right }, startPos, endPos);
			}
			case TokenKind.Slash: {
				return NODE('div', { left, right }, startPos, endPos);
			}
			case TokenKind.Percent: {
				return NODE('rem', { left, right }, startPos, endPos);
			}
			case TokenKind.Plus: {
				return NODE('add', { left, right }, startPos, endPos);
			}
			case TokenKind.Minus: {
				return NODE('sub', { left, right }, startPos, endPos);
			}
			case TokenKind.Lt: {
				return NODE('lt', { left, right }, startPos, endPos);
			}
			case TokenKind.LtEq: {
				return NODE('lteq', { left, right }, startPos, endPos);
			}
			case TokenKind.Gt: {
				return NODE('gt', { left, right }, startPos, endPos);
			}
			case TokenKind.GtEq: {
				return NODE('gteq', { left, right }, startPos, endPos);
			}
			case TokenKind.Eq2: {
				return NODE('eq', { left, right }, startPos, endPos);
			}