acerix /
cnum
| Total Complexity | 6 |
| Complexity/F | 3 |
| Lines of Code | 57 |
| Function Count | 2 |
| Duplicated Lines | 0 |
| Ratio | 0 % |
| Coverage | 100% |
| Changes | 0 | ||
| 1 | import { Token, TokenType } from "./Token" |
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| 2 | |||
| 3 | interface Identifiers<T> { |
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| 4 | [Key: string]: T; |
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| 5 | } |
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| 6 | |||
| 7 | /** |
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| 8 | * @class Parser |
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| 9 | * @name Parser |
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| 10 | */ |
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| 11 | 2 | export class Parser { |
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| 12 | tokens: Generator<Token> |
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| 13 | 7 | identifiers: Identifiers<string> = {} |
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| 14 | |||
| 15 | /** |
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| 16 | * Initialize a parser from a token generator. |
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| 17 | */ |
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| 18 | constructor(tokens: Generator<Token>) { |
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| 19 | 7 | this.tokens = tokens |
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| 20 | } |
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| 21 | |||
| 22 | /** |
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| 23 | * Evaluate the result. |
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| 24 | */ |
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| 25 | evaluate(): bigint { |
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| 26 | 6 | let n = 0n |
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| 27 | 6 | for(const x of this.tokens) { |
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| 28 | 8 | if (x.type === TokenType.identifier) { |
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| 29 | 3 | if (!(x.s in this.identifiers)) { |
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| 30 | 2 | throw `"${x.s}" is undefined` |
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| 31 | } |
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| 32 | 1 | n += BigInt(this.identifiers[x.s]) |
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| 33 | } |
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| 34 | // else if (x.type === TokenType.separator) { |
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| 35 | // } |
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| 36 | // else if (x.type === TokenType.operator) { |
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| 37 | // if (x.s === '=') { |
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| 38 | // } |
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| 39 | // } |
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| 40 | 5 | else if (x.type === TokenType.literal) { |
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| 41 | 3 | n += BigInt(x.s) |
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| 42 | } |
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| 43 | } |
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| 44 | 4 | return n |
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| 45 | } |
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| 46 | |||
| 47 | /** |
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| 48 | * The text representation. |
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| 49 | */ |
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| 50 | toString(): string { |
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| 51 | 2 | return this.evaluate().toString() |
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| 52 | } |
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| 53 | |||
| 54 | } |
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| 55 | |||
| 56 | export default Parser |
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| 57 |
