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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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 9361x 9361x 9361x 9361x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 27933x 9361x 9361x 8898x 8898x 9361x 9361x 216x 216x 9361x 9361x 246x 246x 246x 19x 19x 227x 227x 246x 246x 227x 227x 246x 1314x 1314x 1300x 1300x 14x 14x 1314x 1314x 1314x 10x 10x 1314x 227x 227x 227x 9361x 9361x 9361x 9361x 11x 13x 13x 2x 2x 11x 11x 11x 11x 11x 11x 9361x 9361x 9361x 11x 31x 31x 10x 31x 2x 21x 1x 1x 31x 10x 10x 9361x 9361x | import {Issue} from "../issue";
import * as Statements from "../abap/2_statements/statements";
import * as Expressions from "../abap/2_statements/expressions";
import {ABAPRule} from "./_abap_rule";
import {BasicRuleConfig} from "./_basic_rule_config";
import {Version} from "../version";
import {IRuleMetadata, RuleTag} from "./_irule";
import {StatementNode} from "../abap/nodes";
import {Comment} from "../abap/2_statements/statements/_statement";
import {ABAPFile} from "../abap/abap_file";
import {ABAPObject} from "../objects/_abap_object";
export class UseLineExistsConf extends BasicRuleConfig {
}
export class UseLineExists extends ABAPRule {
private conf = new UseLineExistsConf();
public getMetadata(): IRuleMetadata {
return {
key: "use_line_exists",
title: "Use line_exists",
shortDescription: `Use line_exists, from 740sp02 and up`,
extendedInformation: `
https://github.com/SAP/styleguides/blob/main/clean-abap/CleanABAP.md#prefer-line_exists-to-read-table-or-loop-at
Not reported if the READ TABLE statement contains BINARY SEARCH.`,
tags: [RuleTag.Upport, RuleTag.Styleguide, RuleTag.SingleFile],
badExample: `READ TABLE my_table TRANSPORTING NO FIELDS WITH KEY key = 'A'.
IF sy-subrc = 0.
ENDIF.`,
goodExample: `IF line_exists( my_table[ key = 'A' ] ).
ENDIF.`,
};
}
public getConfig() {
return this.conf;
}
public setConfig(conf: UseLineExistsConf) {
this.conf = conf;
}
public runParsed(file: ABAPFile, obj: ABAPObject) {
const issues: Issue[] = [];
if (obj.getType() === "INTF") {
return [];
}
const vers = this.reg.getConfig().getVersion();
if (vers === Version.OpenABAP) {
return [];
} else if (vers < Version.v740sp02 && vers !== Version.Cloud) {
return [];
}
const statements = file.getStatements();
for (let i = 0; i < statements.length; i++) {
const statement = statements[i];
if (!(statement.get() instanceof Statements.ReadTable)) {
continue;
}
const concat = statement.concatTokens().toUpperCase();
if (concat.includes(" TRANSPORTING NO FIELDS") === true
&& concat.includes(" BINARY SEARCH") === false
&& this.checksSubrc(i, statements) === true
&& this.usesTabix(i, statements) === false) {
issues.push(Issue.atStatement(file, statement, "Use line_exists", this.getMetadata().key, this.conf.severity));
}
}
return issues;
}
///////////////////////
private checksSubrc(index: number, statements: readonly StatementNode[]): boolean {
for (let i = index + 1; i < statements.length; i++) {
const statement = statements[i];
if (statement.get() instanceof Comment) {
continue;
}
for (const c of statement.findAllExpressions(Expressions.Cond)) {
for (const s of c.findAllExpressions(Expressions.Source)) {
if (s.concatTokens().toUpperCase() === "SY-SUBRC") {
return true;
}
}
}
return false;
}
return false;
}
// this is a heuristic, data flow analysis is required to get the correct result
private usesTabix(index: number, statements: readonly StatementNode[]): boolean {
for (let i = index + 1; i < index + 5; i++) {
const statement = statements[i];
if (statement === undefined) {
break;
} else if (statement.get() instanceof Comment) {
continue;
} else if (statement.concatTokens().toUpperCase().includes(" SY-TABIX")) {
return true;
}
}
return false;
}
} |