16 lines
391 B
TypeScript
16 lines
391 B
TypeScript
export function is_digit(c: string): boolean {
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return c >= '0' && c <= '9';
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}
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export function is_lowercase(c: string): boolean {
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return c >= 'a' && c <= 'z';
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}
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export function is_uppercase(c: string): boolean {
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return c >= 'A' && c <= 'Z';
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}
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export function is_identifier_char(c: string): boolean {
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return is_lowercase(c) || is_uppercase(c) || is_digit(c) || c === '_';
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}
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