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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 461401x 461401x 461401x 461401x 461401x 461401x 65354x 65354x 461401x 1x 1x 3215533x 3215533x 1x 1x 396047x 396047x 396047x 396047x 1x 1x 527132x 527132x 1x 1x 768844x 768844x 1x 1x 371352x 371352x 1x 1x 4235901x 4235901x 1x 1x | import {AbstractToken} from "../1_lexer/tokens/abstract_token";
import {ExpressionNode} from "../nodes/expression_node";
import {TokenNode} from "../nodes/token_node";
export class Result {
private readonly tokens: readonly AbstractToken[];
private readonly tokenIndex: number;
private nodes: (ExpressionNode | TokenNode)[] | undefined;
public constructor(tokens: readonly AbstractToken[], tokenIndex: number, nodes?: (ExpressionNode | TokenNode)[]) {
// tokens: all tokens, from the tokenIndex = not yet matched
// nodes: matched tokens
this.tokens = tokens;
this.tokenIndex = tokenIndex;
this.nodes = nodes;
if (this.nodes === undefined) {
this.nodes = [];
}
}
public peek(): AbstractToken {
return this.tokens[this.tokenIndex];
}
public shift(node: ExpressionNode | TokenNode): Result {
const cp = this.nodes!.slice();
cp.push(node);
return new Result(this.tokens, this.tokenIndex + 1, cp);
}
public popNode(): ExpressionNode | TokenNode | undefined {
return this.nodes!.pop();
}
public getNodes(): (ExpressionNode | TokenNode)[] {
return this.nodes!;
}
public setNodes(n: (ExpressionNode | TokenNode)[]): void {
this.nodes = n;
}
public remainingLength(): number {
return this.tokens.length - this.tokenIndex;
}
} |