Press n or j to go to the next uncovered block, b, p or k for the previous block.
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438x 799x 799x 1x 1x 1x 1x 1x 5x 5x 5x | import * as Tokens from "../1_lexer/tokens";
import {AbstractToken as Tokens_Token} from "../1_lexer/tokens/abstract_token";
import {Position} from "../../position";
import {TokenNode, ExpressionNode, TokenNodeRegex} from "../nodes";
import {Version, LanguageVersion, ABAPRelease, Release, releaseAtLeast, versionToABAPRelease} from "../../version";
import {IStatementRunnable} from "./statement_runnable";
import {Result} from "./result";
class Regex implements IStatementRunnable {
private readonly regexp: RegExp;
public constructor(r: RegExp) {
this.regexp = r;
}
public listKeywords(): string[] {
return [];
}
public getUsing(): string[] {
return [];
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
if (input.remainingLength() === 0) {
continue;
}
const token = input.peek();
if (this.regexp.test(token.getStr()) === true) {
result.push(input.shift(new TokenNodeRegex(token)));
}
}
return result;
}
public railroad() {
return "Railroad.Terminal(\"" + this.regexp.source.replace(/\\/g, "\\\\").replace(/"/g, "\\\"") + "\")";
}
public toStr() {
return this.regexp.toString();
}
public first() {
return [""];
}
}
class Word implements IStatementRunnable {
private readonly s: string;
public constructor(s: string) {
this.s = s.toUpperCase();
}
public listKeywords(): string[] {
return [this.s];
}
public getUsing(): string[] {
return [];
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
if (input.remainingLength() !== 0
&& input.peek().getUpperStr() === this.s) {
// console.log("match, " + this.s + result.length);
result.push(input.shift(new TokenNode(input.peek())));
}
}
return result;
}
public railroad() {
return "Railroad.Terminal('\"" + this.s + "\"')";
}
public toStr() {
return "\"" + this.s + "\"";
}
public first() {
return [this.s];
}
}
class Token implements IStatementRunnable {
private readonly name: string;
private readonly tokenType: new (p: Position, s: string) => Tokens_Token;
public constructor(t: new (p: Position, s: string) => Tokens_Token) {
this.tokenType = t;
this.name = t.name;
}
public listKeywords(): string[] {
return [];
}
public getUsing(): string[] {
return [];
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
if (input.remainingLength() !== 0
&& input.peek().constructor === this.tokenType) {
result.push(input.shift(new TokenNode(input.peek())));
}
}
return result;
}
public railroad() {
let text = this.name;
const toke: any = Tokens;
for (const token in Tokens) {
if (token.toUpperCase() === this.name && toke[token].railroad) {
text = toke[token].railroad();
break;
}
}
return "Railroad.Terminal('!\"" + text + "\"')";
}
public toStr() {
return "Token \"" + this.name + "\"";
}
public first() {
return [""];
}
}
export enum AlsoIn {
OpenABAP = "OpenABAP",
}
export interface IVerOptions {
also?: AlsoIn;
}
class Vers implements IStatementRunnable {
private readonly release: ABAPRelease;
private readonly runnable: IStatementRunnable;
private readonly also: AlsoIn | undefined;
public constructor(release: ABAPRelease, runnable: IStatementRunnable, also?: AlsoIn) {
this.release = release;
this.runnable = runnable;
this.also = also;
}
public listKeywords(): string[] {
return this.runnable.listKeywords();
}
public run(r: Result[]): Result[] {
if (Combi.isOpenABAP() === true) {
if (this.also === AlsoIn.OpenABAP) { return this.runnable.run(r); }
return releaseAtLeast(Release.v702, this.release) ? this.runnable.run(r) : [];
}
return releaseAtLeast(Combi.getRelease(), this.release) ? this.runnable.run(r) : [];
}
public getUsing(): string[] {
return this.runnable.getUsing();
}
public railroad() {
let text = this.release.abap ?? "Newest";
if (this.also) {
text += " or " + this.also;
}
return "Railroad.Sequence(Railroad.Comment(\"" +
text +
"\", {}), " +
this.runnable.railroad() +
")";
}
public toStr() {
return "Version(" + this.runnable.toStr() + ")";
}
public first() {
return this.runnable.first();
}
}
function langVersionOrdinal(v: LanguageVersion): number {
switch (v) {
case LanguageVersion.KeyUser: return 0;
case LanguageVersion.Cloud: return 1;
case LanguageVersion.Normal: return 2;
default: return 2;
}
}
class LangVers implements IStatementRunnable {
private readonly langVersion: LanguageVersion;
private readonly runnable: IStatementRunnable;
public constructor(langVersion: LanguageVersion, runnable: IStatementRunnable) {
this.langVersion = langVersion;
this.runnable = runnable;
}
public listKeywords(): string[] {
return this.runnable.listKeywords();
}
public getUsing(): string[] {
return this.runnable.getUsing();
}
public run(r: Result[]): Result[] {
if (langVersionOrdinal(Combi.getLanguageVersion()) <= langVersionOrdinal(this.langVersion)) {
return this.runnable.run(r);
} else {
return [];
}
}
public railroad() {
return "Railroad.Sequence(Railroad.Comment(\"langver=" +
this.langVersion +
"\", {}), " +
this.runnable.railroad() +
")";
}
public toStr() {
return "LangVersion(" + this.runnable.toStr() + ")";
}
public first() {
return this.runnable.first();
}
}
class LangVersNot implements IStatementRunnable {
private readonly langVersion: LanguageVersion;
private readonly runnable: IStatementRunnable;
public constructor(langVersion: LanguageVersion, runnable: IStatementRunnable) {
this.langVersion = langVersion;
this.runnable = runnable;
}
public listKeywords(): string[] {
return this.runnable.listKeywords();
}
public getUsing(): string[] {
return this.runnable.getUsing();
}
public run(r: Result[]): Result[] {
if (langVersionOrdinal(Combi.getLanguageVersion()) > langVersionOrdinal(this.langVersion)) {
return this.runnable.run(r);
} else {
return [];
}
}
public railroad() {
return "Railroad.Sequence(Railroad.Comment(\"not langver=" +
this.langVersion +
"\", {}), " +
this.runnable.railroad() +
")";
}
public toStr() {
return "LanguageVersionNot(" + this.runnable.toStr() + ")";
}
public first() {
return this.runnable.first();
}
}
class OptionalPriority implements IStatementRunnable {
private readonly optional: IStatementRunnable;
public constructor(optional: IStatementRunnable) {
this.optional = optional;
}
public listKeywords(): string[] {
return this.optional.listKeywords();
}
public getUsing(): string[] {
return this.optional.getUsing();
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
const res = this.optional.run([input]);
if (res.length > 1) {
result.push(...res);
} else if (res.length === 0) {
result.push(input);
} else if (res[0].remainingLength() < input.remainingLength()) {
result.push(...res);
} else {
result.push(input);
}
}
return result;
}
public railroad() {
return "Railroad.Optional(" + this.optional.railroad() + ")";
}
public toStr() {
return "opt(" + this.optional.toStr() + ")";
}
public first() {
return [""];
}
}
class Optional implements IStatementRunnable {
private readonly optional: IStatementRunnable;
public constructor(optional: IStatementRunnable) {
this.optional = optional;
}
public listKeywords(): string[] {
return this.optional.listKeywords();
}
public getUsing(): string[] {
return this.optional.getUsing();
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
result.push(input);
const res = this.optional.run([input]);
if (res.length === 1) {
result.push(res[0]);
} else {
result.push(...res);
}
}
return result;
}
public railroad() {
return "Railroad.Optional(" + this.optional.railroad() + ")";
}
public toStr() {
return "opt(" + this.optional.toStr() + ")";
}
public first() {
return [""];
}
}
class Star implements IStatementRunnable {
private readonly sta: IStatementRunnable;
public constructor(sta: IStatementRunnable) {
this.sta = sta;
}
public listKeywords(): string[] {
return this.sta.listKeywords();
}
public getUsing(): string[] {
return this.sta.getUsing();
}
public run(r: Result[]): Result[] {
let result = r;
try {
let res = r;
let input: Result[] = [];
for (;;) {
input = res;
res = this.sta.run(input);
if (res.length === 0) {
break;
}
if (res.length > 1000) {
// avoid stack overflow
result = result.concat(res);
} else if (res.length === 1) {
result.push(res[0]);
} else {
result.push(...res);
}
}
} catch (err) {
if (err instanceof FailStarError) {
return result;
}
throw err;
}
// console.dir(result);
return result;
}
public railroad() {
return "Railroad.ZeroOrMore(" + this.sta.railroad() + ")";
}
public toStr() {
return "star(" + this.sta.toStr() + ")";
}
public first() {
return [""];
}
}
class StarPriority implements IStatementRunnable {
private readonly sta: IStatementRunnable;
public constructor(sta: IStatementRunnable) {
this.sta = sta;
}
public listKeywords(): string[] {
return this.sta.listKeywords();
}
public getUsing(): string[] {
return this.sta.getUsing();
}
public run(r: Result[]): Result[] {
let result: Result[] = r;
let res = r;
// let input: Result[] = [];
let prev: Result[] | undefined;
for (;;) {
// input = res;
res = this.sta.run(res);
if (res.length === 0) {
if (prev !== undefined) {
// console.log("star length: " + prev.length);
let best = Number.MAX_SAFE_INTEGER;
for (const p of prev) {
if (p.remainingLength() < best) {
result = [p];
best = p.remainingLength();
}
}
}
break;
}
prev = res;
}
return result;
}
public railroad() {
return "Railroad.ZeroOrMore(" + this.sta.railroad() + ")";
}
public toStr() {
return "star(" + this.sta.toStr() + ")";
}
public first() {
return [""];
}
}
class Plus implements IStatementRunnable {
private readonly plu: IStatementRunnable;
private readonly sub: Sequence;
public constructor(plu: IStatementRunnable) {
this.plu = plu;
this.sub = new Sequence([this.plu, new Star(this.plu)]);
}
public listKeywords(): string[] {
return this.plu.listKeywords();
}
public getUsing(): string[] {
return this.plu.getUsing();
}
public run(r: Result[]): Result[] {
return this.sub.run(r);
}
public railroad() {
return "Railroad.OneOrMore(" + this.plu.railroad() + ")";
}
public toStr() {
return "plus(" + this.plu.toStr() + ")";
}
public first() {
return this.plu.first();
}
}
class PlusPriority implements IStatementRunnable {
private readonly plu: IStatementRunnable;
private readonly sub: Sequence;
public constructor(plu: IStatementRunnable) {
this.plu = plu;
this.sub = new Sequence([this.plu, new StarPriority(this.plu)]);
}
public listKeywords(): string[] {
return this.plu.listKeywords();
}
public getUsing(): string[] {
return this.plu.getUsing();
}
public run(r: Result[]): Result[] {
return this.sub.run(r);
}
public railroad() {
return "Railroad.OneOrMore(" + this.plu.railroad() + ")";
}
public toStr() {
return "plus(" + this.plu.toStr() + ")";
}
public first() {
return this.plu.first();
}
}
class Sequence implements IStatementRunnable {
private readonly list: IStatementRunnable[];
public constructor(list: IStatementRunnable[]) {
if (list.length < 2) {
throw new Error("Sequence, length error");
}
this.list = list;
}
public listKeywords(): string[] {
const ret: string[] = [];
for (const i of this.list) {
ret.push(...i.listKeywords());
}
return ret;
}
public getUsing(): string[] {
return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
}
public run(r: Result[]): Result[] {
let result: Result[] = [];
for (const input of r) {
let temp = [input];
let match = true;
for (const sequence of this.list) {
temp = sequence.run(temp);
if (temp.length === 0) {
match = false;
break;
}
}
if (match === true) {
if (temp.length > 1000) {
// avoid stack overflow
result = result.concat(temp);
} else if (temp.length === 1) {
result.push(temp[0]);
} else {
result.push(...temp);
}
}
}
return result;
}
public railroad() {
const children = this.list.map((e) => { return e.railroad(); });
return "Railroad.Sequence(" + children.join() + ")";
}
public toStr() {
let ret = "";
for (const i of this.list) {
ret = ret + i.toStr() + ",";
}
return "seq(" + ret + ")";
}
public first() {
return this.list[0].first();
}
}
class WordSequence implements IStatementRunnable {
private readonly stri: string;
private readonly words: IStatementRunnable[] = [];
private readonly seq: Sequence;
public constructor(stri: string) {
this.stri = stri;
const foo = this.stri.replace(/-/g, " - ");
const split = foo.split(" ");
for (const st of split) {
// todo, use Dash token
this.words.push(new Word(st));
}
this.seq = new Sequence(this.words);
}
public listKeywords(): string[] {
return [this.stri.toString()];
}
public getUsing(): string[] {
return [];
}
public run(r: Result[]): Result[] {
return this.seq.run(r);
}
public railroad() {
return "Railroad.Terminal('\"" + this.stri + "\"')";
}
public toStr() {
return "str(" + this.stri + ")";
}
public first() {
return this.words[0].first();
}
}
export abstract class Expression implements IStatementRunnable {
private runnable: IStatementRunnable | undefined = undefined;
public run(r: Result[]): Result[] {
const results: Result[] = [];
if (this.runnable === undefined) {
this.runnable = this.getRunnable();
}
for (const input of r) {
const temp = this.runnable.run([input]);
for (const t of temp) {
const consumed = input.remainingLength() - t.remainingLength();
if (consumed > 0) {
const re = new ExpressionNode(this);
results.push(t.wrapConsumed(consumed, re));
} else {
results.push(t);
}
}
}
// console.dir(results);
return results;
}
public abstract getRunnable(): IStatementRunnable;
public listKeywords(): string[] {
// do not recurse, all Expressions are evaluated only on first level
return [];
}
public getUsing(): string[] {
return ["expression/" + this.getName()];
}
public getName(): string {
return this.constructor.name;
}
public railroad() {
return "Railroad.NonTerminal('" + this.getName() + "', {href: '#/expression/" + this.getName() + "'})";
}
public toStr() {
return "expression(" + this.getName() + ")";
}
public first() {
return this.getRunnable().first();
}
}
class Permutation implements IStatementRunnable {
private readonly list: IStatementRunnable[];
public constructor(list: IStatementRunnable[]) {
if (list.length < 2) {
throw new Error("Permutation, length error, got " + list.length);
}
this.list = list;
}
public listKeywords(): string[] {
const ret: string[] = [];
for (const i of this.list) {
ret.push(...i.listKeywords());
}
return ret;
}
public getUsing() {
return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
const copy = this.list.slice();
for (let index = 0; index < this.list.length; index++) {
const temp = this.list[index].run(r);
if (temp.length !== 0) {
// match
result.push(...temp);
const left = copy;
left.splice(index, 1);
if (left.length === 1) {
result.push(...left[0].run(temp));
} else {
result.push(...new Permutation(left).run(temp));
}
}
}
return result;
}
public railroad() {
const children = this.list.map((e) => { return e.railroad(); });
return "Railroad.MultipleChoice(0, 'any'," + children.join() + ")";
}
public toStr() {
const children = this.list.map((e) => { return e.toStr(); });
return "per(" + children.join() + ")";
}
public first() {
return [""];
}
}
class FailCombinatorError extends Error {
}
class FailStarError extends Error {
}
class FailCombinator implements IStatementRunnable {
public listKeywords(): string[] {
return [];
}
public getUsing() {
return [];
}
public run(_r: Result[]): Result[] {
throw new FailCombinatorError();
}
public railroad() {
return "Railroad.Terminal('!FailCombinator')";
}
public toStr() {
return "fail()";
}
public first() {
return [];
}
}
// Note that Plus is implemented with Star
class FailStar implements IStatementRunnable {
public listKeywords(): string[] {
return [];
}
public getUsing() {
return [];
}
public run(_r: Result[]): Result[] {
throw new FailStarError();
}
public railroad() {
return "Railroad.Terminal('!FailStar')";
}
public toStr() {
return "fail()";
}
public first() {
return [];
}
}
class Alternative implements IStatementRunnable {
private readonly list: IStatementRunnable[];
public constructor(list: IStatementRunnable[]) {
if (list.length < 2) {
throw new Error("Alternative, length error");
}
this.list = list;
}
public listKeywords(): string[] {
const ret: string[] = [];
for (const i of this.list) {
ret.push(...i.listKeywords());
}
return ret;
}
public getUsing() {
return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const sequ of this.list) {
const temp = sequ.run(r);
if (temp.length === 1) {
result.push(temp[0]);
} else {
result.push(...temp);
}
}
return result;
}
public railroad() {
const children = this.list.map((e) => { return e.railroad(); });
return "Railroad.Choice(0, " + children.join() + ")";
}
public toStr() {
let ret = "";
for (const i of this.list) {
ret = ret + i.toStr() + ",";
}
return "alt(" + ret + ")";
}
public first() {
if (this.list.length !== 2) {
return [""];
}
const f1 = this.list[0].first();
const f2 = this.list[1].first();
if (f1.length === 1 && f1[0] === "") {
return f1;
}
if (f2.length === 1 && f2[0] === "") {
return f2;
}
if (f1.length === 1 && f2.length === 1 && f1[0] === f2[0]) {
return f1;
}
f1.push(...f2);
return f1;
}
}
// prioritized alternative, skip others if match found
class AlternativePriority implements IStatementRunnable {
private readonly list: IStatementRunnable[];
public constructor(list: IStatementRunnable[]) {
if (list.length < 2) {
throw new Error("Alternative, length error");
}
this.list = list;
}
public listKeywords(): string[] {
const ret: string[] = [];
for (const i of this.list) {
ret.push(...i.listKeywords());
}
return ret;
}
public getUsing() {
return this.list.reduce((a, c) => { return a.concat(c.getUsing()); }, [] as string[]);
}
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const sequ of this.list) {
// console.log(seq.toStr());
const temp = sequ.run(r);
if (temp.length > 0) {
if (temp.length === 1) {
result.push(temp[0]);
} else {
result.push(...temp);
}
break;
}
}
return result;
}
public railroad() {
const children = this.list.map((e) => { return e.railroad(); });
return "Railroad.Choice(0, " + children.join() + ")";
}
public toStr() {
let ret = "";
for (const i of this.list) {
ret = ret + i.toStr() + ",";
}
return "alt(" + ret + ")";
}
public first() {
if (this.list.length !== 2) {
return [""];
}
const f1 = this.list[0].first();
const f2 = this.list[1].first();
if (f1.length === 1 && f1[0] === "") {
return f1;
}
if (f2.length === 1 && f2[0] === "") {
return f2;
}
if (f1.length === 1 && f2.length === 1 && f1[0] === f2[0]) {
return f1;
}
f1.push(...f2);
return f1;
}
}
export class Combi {
// todo, change this class to be instantiated, constructor(runnable) ?
private static release: ABAPRelease = Release.v758;
private static langVer: LanguageVersion = LanguageVersion.Normal;
public static railroad(runnable: IStatementRunnable, complex = false): string {
// todo, move method to graph.js?
let type = "Railroad.Diagram(";
if (complex === true) {
type = "Railroad.ComplexDiagram(";
}
const result = "Railroad.Diagram.INTERNAL_ALIGNMENT = 'left';\n" +
type +
runnable.railroad() +
").toString();";
return result;
}
public static listKeywords(runnable: IStatementRunnable): string[] {
// todo, move these walkers of the syntax tree to some abstraction?
let res = runnable.listKeywords();
// remove duplicates
res = res.filter((x, i, a) => { return a.indexOf(x) === i; });
return res;
}
// assumption: no pragmas supplied in tokens input
public static run(
runnable: IStatementRunnable,
tokens: readonly Tokens_Token[], versionOrRelease: Version | ABAPRelease,
languageVersion: LanguageVersion = LanguageVersion.Normal): (ExpressionNode | TokenNode)[] | undefined {
this.langVer = languageVersion;
if (typeof versionOrRelease === "string") {
this.release = versionToABAPRelease(versionOrRelease);
} else {
this.release = versionOrRelease;
}
const input = new Result(tokens, 0);
try {
const result = runnable.run([input]);
/*
console.log("res: " + result.length);
for (const res of result) {
console.dir(res.getNodes().map(n => n.get().constructor.name));
console.dir(res.getNodes().map(n => n.concatTokens()));
}
*/
for (const res of result) {
if (res.remainingLength() === 0) {
return res.getNodes();
}
}
} catch (err) {
if (err instanceof FailCombinatorError) {
return undefined;
}
throw err;
}
return undefined;
}
public static getRelease(): ABAPRelease {
return this.release;
}
public static getLanguageVersion(): LanguageVersion {
return this.langVer;
}
public static isOpenABAP(): boolean {
return this.release === Release["open-abap"];
}
}
// -----------------------------------------------------------------------------
export function str(s: string): IStatementRunnable {
if (s.indexOf(" ") > 0 || s.indexOf("-") > 0) {
return new WordSequence(s);
} else {
return new Word(s);
}
}
export function regex(r: RegExp): IStatementRunnable {
return new Regex(r);
}
export function tok(t: new (p: Position, s: string) => Tokens_Token): IStatementRunnable {
return new Token(t);
}
const expressionSingletons: {[index: string]: Expression} = {};
const stringSingletons: {[index: string]: IStatementRunnable} = {};
type InputType = (new () => Expression) | string | IStatementRunnable;
function mapInput(s: InputType): IStatementRunnable {
const type = typeof s;
if (type === "string") {
if (stringSingletons[s as string] === undefined) {
stringSingletons[s as string] = str(s as string);
}
return stringSingletons[s as string];
} else if (type === "function") {
// @ts-ignore
const name = s.name;
if (expressionSingletons[name] === undefined) {
// @ts-ignore
expressionSingletons[name] = new s();
}
return expressionSingletons[name];
} else {
return s as IStatementRunnable;
}
}
export function seq(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
const list = [mapInput(first), mapInput(second)];
list.push(...rest.map(mapInput));
return new Sequence(list);
}
export function alt(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
const list = [mapInput(first), mapInput(second)];
list.push(...rest.map(mapInput));
return new Alternative(list);
}
export function altPrio(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
const list = [mapInput(first), mapInput(second)];
list.push(...rest.map(mapInput));
return new AlternativePriority(list);
}
export function opt(first: InputType): IStatementRunnable {
return new Optional(mapInput(first));
}
export function optPrio(first: InputType): IStatementRunnable {
return new OptionalPriority(mapInput(first));
}
export function per(first: InputType, second: InputType, ...rest: InputType[]): IStatementRunnable {
const list = [mapInput(first), mapInput(second)];
list.push(...rest.map(mapInput));
return new Permutation(list);
}
export function star(first: InputType): IStatementRunnable {
return new Star(mapInput(first));
}
export function starPrio(first: InputType): IStatementRunnable {
return new StarPriority(mapInput(first));
}
export function plus(first: InputType): IStatementRunnable {
return new Plus(mapInput(first));
}
export function plusPrio(first: InputType): IStatementRunnable {
return new PlusPriority(mapInput(first));
}
function inputToRelease(versionOrRelease: Version | ABAPRelease): ABAPRelease {
if (typeof versionOrRelease === "string") {
return versionToABAPRelease(versionOrRelease);
}
return versionOrRelease;
}
export function ver(versionOrRelease: Version | ABAPRelease, first: InputType, opts: IVerOptions = {}): IStatementRunnable {
return new Vers(inputToRelease(versionOrRelease), mapInput(first), opts.also);
}
export function verLang(langVersion: LanguageVersion, first: InputType): IStatementRunnable {
return new LangVers(langVersion, mapInput(first));
}
export function verNotLang(langVersion: LanguageVersion, first: InputType): IStatementRunnable {
return new LangVersNot(langVersion, mapInput(first));
}
export function failCombinator(): IStatementRunnable {
return new FailCombinator();
}
export function failStar(): IStatementRunnable {
return new FailStar();
}
// Passes through results where the next two tokens do NOT match t1 followed by t2.
class StopBefore2 implements IStatementRunnable {
private readonly t1: string;
private readonly t2: string;
public constructor(t1: string, t2: string) {
this.t1 = t1.toUpperCase();
this.t2 = t2.toUpperCase();
}
public listKeywords(): string[] { return []; }
public getUsing(): string[] { return []; }
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
const next = input.peek();
if (next === undefined) { continue; }
if (next.getUpperStr() === this.t1 && input.peekAt(1)?.getUpperStr() === this.t2) {
continue;
}
result.push(input);
}
return result;
}
public railroad() { return "Railroad.Terminal('stopBefore(" + this.t1 + " " + this.t2 + ")')"; }
public toStr() { return "stopBefore(" + this.t1 + "," + this.t2 + ")"; }
public first() { return [""]; }
}
export function stopBefore(t1: string, t2: string): IStatementRunnable {
return new StopBefore2(t1, t2);
}
class StopBefore1 implements IStatementRunnable {
private readonly words: string[];
public constructor(words: string[]) { this.words = words.map(w => w.toUpperCase()); }
public listKeywords(): string[] { return []; }
public getUsing(): string[] { return []; }
public run(r: Result[]): Result[] {
const result: Result[] = [];
for (const input of r) {
const next = input.peek()?.getUpperStr();
if (next !== undefined && this.words.includes(next)) { continue; }
result.push(input);
}
return result;
}
public railroad() { return "Railroad.Terminal('stopBefore(" + this.words.join("|") + ")')"; }
public toStr() { return "stopBefore(" + this.words.join(",") + ")"; }
public first() { return [""]; }
}
export function stopBefore1(...words: string[]): IStatementRunnable {
return new StopBefore1(words);
}
|