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sexpr.ts
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sexpr.ts
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import { Token } from 'tinypratt'
export interface SExpr extends Array<string | (string & Token) | SExpr> {
[n: number]: string | (string & Token) | SExpr
}
export const S = (p: string | (string & Token) | SExpr, x = 0): string => {
return Array.isArray(p)
? p.length
? Array.isArray(p[0])
? p.map(e => '\n' + S(e, x + 2)).join(' ') // TODO: ident
: `${' '.repeat(x)}(${p[0]} ${
p
.slice(1)
.map(e => (Array.isArray(e) ? '\n' : '') + S(e, x + 2))
.join(' ')
})`
: ''
: p
}
export const S0 = (p: string | (string & Token) | SExpr): string => {
return Array.isArray(p)
? p.length
? Array.isArray(p[0])
? p.map(x => S0(x)).join(' ')
: `(${p[0]} ${
p
.slice(1)
.map(e => S0(e))
.join(' ')
})`
: ''
: p
}