Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 | 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 20788x 20788x 20788x 20788x 20788x 20788x 20788x 20788x 1x 330x 330x 330x 330x 445x 262x 60x 60x 262x 385x 385x 330x 330x 399x 399x 480x 280x 280x 233x 233x 280x 280x 480x 119x 330x 330x 330x 330x 330x 330x 365x 365x 330x 1x 10462x 10462x 10462x 10462x 10462x 10462x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 31107x 10462x 10462x 9814x 9814x 10462x 10462x 243x 243x 2x 2x 243x 10462x 10462x 380x 380x 380x 10462x 10462x 450x 62x 450x 21x 21x 367x 450x 374x 1904x 7x 7x 1904x 367x 360x 360x 360x 450x 30x 30x 330x 330x 330x 330x 330x 450x 79x 79x 251x 251x 450x 306x 249x 306x 35x 35x 35x 35x 3x 3x 35x 306x 248x 248x 248x 10462x 10462x 1211x 1211x 643x 643x 643x 399x 399x 643x 1211x 1211x 925x 925x 1211x 10462x 10462x 1445x 1445x 1445x 2x 2x 1443x 1445x 1115x 1115x 1443x 1445x 1114x 1114x 714x 714x 714x 714x 714x 1x 714x 713x 713x 713x 268x 268x 268x 445x 714x 714x 1114x 1445x 10462x 10462x 330x 330x 330x 152x 152x 152x 5x 5x 147x 147x 152x 7x 152x 1x 1x 139x 139x 139x 139x 139x 139x 139x 330x 330x 330x 10462x 10462x 140x 140x 140x 140x 2x 2x 138x 138x 140x 829x 12x 12x 829x 138x 138x 829x 126x 126x 126x 10462x 10462x 147x 147x 147x 147x 147x 147x 147x 147x 147x 147x 10462x 10462x 139x 139x 2x 2x 137x 137x 139x 139x 85x 85x 52x 52x 10462x | import {Issue} from "../issue";
import {BasicRuleConfig} from "./_basic_rule_config";
import {IRegistry} from "../_iregistry";
import {IRule, IRuleMetadata, RuleTag} from "./_irule";
import {IObject} from "../objects/_iobject";
import {SyntaxLogic} from "../abap/5_syntax/syntax";
import {ABAPObject} from "../objects/_abap_object";
import {ScopeType} from "../abap/5_syntax/_scope_type";
import {TypedIdentifier, IdentifierMeta} from "../abap/types/_typed_identifier";
import {Interface, Program} from "../objects";
import {ISpaghettiScopeNode} from "../abap/5_syntax/_spaghetti_scope";
import {Identifier} from "../abap/4_file_information/_identifier";
import {EditHelper, IEdit} from "../edit_helper";
import {StatementNode} from "../abap/nodes/statement_node";
import * as Statements from "../abap/2_statements/statements";
import {Comment, Unknown} from "../abap/2_statements/statements/_statement";
import {ReferenceType} from "../abap/5_syntax/_reference";
export class UnusedVariablesConf extends BasicRuleConfig {
/** skip specific names, case insensitive
* @uniqueItems true
*/
public skipNames?: string[] = [];
/** skip parameters from abstract methods */
public skipAbstract: boolean = false;
}
class WorkArea {
private readonly workarea: {id: TypedIdentifier, count: number}[] = [];
public push(id: TypedIdentifier, count = 1) {
for (const w of this.workarea) {
if (id.equals(w.id)) {
return;
}
}
this.workarea.push({id, count});
}
public removeIfExists(id: Identifier | undefined): void {
if (id === undefined) {
return;
}
for (let i = 0; i < this.workarea.length; i++) {
if (id.equals(this.workarea[i].id)) {
this.workarea[i].count--;
if (this.workarea[i].count === 0) {
this.workarea.splice(i, 1);
}
return;
}
}
}
public get() {
return this.workarea;
}
public count(): number {
return this.workarea.length;
}
}
export class UnusedVariables implements IRule {
private conf = new UnusedVariablesConf();
private reg: IRegistry;
private workarea: WorkArea;
public getMetadata(): IRuleMetadata {
return {
key: "unused_variables",
title: "Unused variables",
shortDescription: `Checks for unused variables and constants`,
extendedInformation: `Skips event parameters.
Note that this currently does not work if the source code uses macros.
Unused variables are not reported if the object contains parser or syntax errors.
Errors found in INCLUDES are reported for the main program.`,
tags: [RuleTag.Quickfix],
pragma: "##NEEDED",
pseudoComment: "EC NEEDED",
badExample: `DATA: BEGIN OF blah1,
test TYPE string,
test2 TYPE string,
END OF blah1.`,
goodExample: `DATA: BEGIN OF blah2 ##NEEDED,
test TYPE string,
test2 TYPE string,
END OF blah2.`,
};
}
public getConfig() {
return this.conf;
}
public setConfig(conf: UnusedVariablesConf) {
this.conf = conf;
if (this.conf.skipNames === undefined) {
this.conf.skipNames = [];
}
}
public initialize(reg: IRegistry) {
this.reg = reg;
return this;
}
public run(obj: IObject): Issue[] {
if (!(obj instanceof ABAPObject)) {
return [];
} else if (obj instanceof Interface) { // todo, how to handle interfaces?
return [];
}
for (const file of obj.getABAPFiles()) {
for (const statement of file.getStatements()) {
if (statement.get() instanceof Unknown) {
return []; // contains parser errors
}
}
}
// dont report unused variables when there are syntax errors
const syntax = new SyntaxLogic(this.reg, obj).run();
if (syntax.issues.length > 0) {
return []; // contains syntax errors
}
this.workarea = new WorkArea();
const top = syntax.spaghetti.getTop();
this.buildWorkarea(top, obj);
if (this.workarea.count() === 0) {
return this.buildIssues(obj); // exit early if all variables are used
}
this.findUses(top, obj);
for (const o of this.reg.getObjects()) {
if (o === obj) {
continue;
} else if (o instanceof ABAPObject) {
if (this.reg.isDependency(o)) {
continue; // do not search in dependencies
}
const syntax = new SyntaxLogic(this.reg, o).run();
this.findUses(syntax.spaghetti.getTop(), o);
if (this.workarea.count() === 0) {
return this.buildIssues(obj); // exit early if all variables are used
}
}
}
return this.buildIssues(obj);
}
private findUses(node: ISpaghettiScopeNode, obj: ABAPObject): void {
for (const r of node.getData().references) {
if (r.referenceType === ReferenceType.DataReadReference
|| r.referenceType === ReferenceType.DataWriteReference
|| r.referenceType === ReferenceType.TypeReference) {
this.workarea.removeIfExists(r.resolved);
}
}
for (const c of node.getChildren()) {
this.findUses(c, obj);
}
}
private buildWorkarea(node: ISpaghettiScopeNode, obj: ABAPObject): void {
const stype = node.getIdentifier().stype;
if (stype === ScopeType.OpenSQL) {
return;
}
for (const c of node.getChildren()) {
this.buildWorkarea(c, obj);
}
if (stype !== ScopeType.BuiltIn) {
const vars = node.getData().vars;
for (const name in vars) {
const meta = vars[name].getMeta();
if (this.conf.skipNames
&& this.conf.skipNames.length > 0
&& this.conf.skipNames.some((a) => a.toUpperCase() === name)) {
continue;
} else if (this.conf.skipAbstract === true && meta.includes(IdentifierMeta.Abstract)) {
continue;
} else if (name === "ME"
|| name === "SUPER"
|| meta.includes(IdentifierMeta.SelectionScreenTab)
|| meta.includes(IdentifierMeta.EventParameter)) {
// todo, workaround for "me" and "super", these should somehow be typed to built-in
continue;
}
const isInline = meta.includes(IdentifierMeta.InlineDefinition);
this.workarea.push(vars[name], isInline ? 2 : 1);
}
}
}
private buildIssues(obj: ABAPObject): Issue[] {
const ret: Issue[] = [];
for (const w of this.workarea.get()) {
const filename = w.id.getFilename();
if (this.reg.isFileDependency(filename) === true) {
continue;
} else if (obj instanceof Program === false && obj.containsFile(filename) === false) {
continue;
}
const statement = this.findStatement(w.id);
if (statement?.getPragmas().map(t => t.getStr()).includes(this.getMetadata().pragma + "")) {
continue;
} else if (this.suppressedbyPseudo(statement, w.id, obj)) {
continue;
}
const name = w.id.getName();
const message = "Variable \"" + name.toLowerCase() + "\" not used";
const fix = this.buildFix(w.id, obj);
ret.push(Issue.atIdentifier(w.id, message, this.getMetadata().key, this.conf.severity, fix));
}
return ret;
}
private suppressedbyPseudo(statement: StatementNode | undefined, v: TypedIdentifier, obj: ABAPObject): boolean {
if (statement === undefined) {
return false;
}
const file = obj.getABAPFileByName(v.getFilename());
if (file === undefined) {
return false;
}
let next = false;
for (const s of file.getStatements()) {
if (next === true && s.get() instanceof Comment) {
return s.concatTokens().includes(this.getMetadata().pseudoComment + "");
}
if (s === statement) {
next = true;
}
}
return false;
}
private findStatement(v: TypedIdentifier): StatementNode | undefined {
const file = this.reg.getFileByName(v.getFilename());
if (file === undefined) {
return undefined;
}
const object = this.reg.findObjectForFile(file);
if (!(object instanceof ABAPObject)) {
return undefined;
}
const abapfile = object.getABAPFileByName(v.getFilename());
if (abapfile === undefined) {
return undefined;
}
const statement = EditHelper.findStatement(v.getToken(), abapfile);
return statement;
}
private buildFix(v: TypedIdentifier, obj: ABAPObject): IEdit | undefined {
const file = obj.getABAPFileByName(v.getFilename());
if (file === undefined) {
return undefined;
}
const statement = EditHelper.findStatement(v.getToken(), file);
if (statement === undefined) {
return undefined;
} else if (statement.get() instanceof Statements.Data) {
return EditHelper.deleteStatement(file, statement);
}
return undefined;
}
} |