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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 | 1x 1x 1126x 1x 1126x 1x 35x 81x 81x 81x 80x 80x 81x 81x 80x 80x 81x 81x 18x 18x 18x 81x 5x 5x 5x 5x 81x 69x 2x 1x 17x 32x 32x 32x 32x 32x 130x 965x 105x 875x 6x 1x 1x | import { EventEmitter } from "events"; import { Node, AstNode } from "./index"; export declare interface AstWalker { new(): EventEmitter; } const isObject = function(obj: any): boolean { return obj != null && obj.constructor.name === "Object" } export function isAstNode(node: Record<string, unknown>): boolean { return ( isObject(node) && 'id' in node && 'nodeType' in node && 'src' in node ) } /** * Crawl the given AST through the function walk(ast, callback) */ /** * visit all the AST nodes * * @param {Object} ast - AST node * @return EventEmitter * event('node', <Node Type | false>) will be fired for every node of type <Node Type>. * event('node', "*") will be fired for all other nodes. * in each case, if the event emits false it does not descend into children. * If no event for the current type, children are visited. */ export class AstWalker extends EventEmitter { manageCallback( node: AstNode, callback: Record<string, unknown> | Function // eslint-disable-line @typescript-eslint/ban-types ): any { // FIXME: we shouldn't be doing this callback determination type on each AST node, // since the callback function is set once per walk. // Better would be to store the right one as a variable and // return that. if (node) { if ((node).name in callback) { return callback[(node).name](node); } else { return callback["*"](node); } } if (<AstNode>node) { if ((<AstNode>node).nodeType in callback) { /* istanbul ignore next */ return callback[(<AstNode>node).nodeType](node); } else { /* istanbul ignore next */ return callback["*"](node); } } } normalizeNodes(nodes: AstNode[]): AstNode[] { // Remove null, undefined and empty elements if any nodes = nodes.filter(e => e) // If any element in nodes is array, extract its members const objNodes = [] nodes.forEach(x => { Iif (Array.isArray(x)) objNodes.push(...x) else objNodes.push(x) }); // Filter duplicate nodes using id field const normalizedNodes = [] objNodes.forEach((element) => { const firstIndex = normalizedNodes.findIndex(e => e.id === element.id) Eif(firstIndex == -1) normalizedNodes.push(element) }) return normalizedNodes } getASTNodeChildren(ast: AstNode): AstNode[] { let nodes = ast.nodes // for ContractDefinition || ast.body // for FunctionDefinition, ModifierDefinition, WhileStatement, DoWhileStatement, ForStatement || ast.statements // for Block, YulBlock || ast.members // for StructDefinition, EnumDefinition || ast.overrides // for OverrideSpecifier || ast.parameters // for ParameterList, EventDefinition || ast.declarations // for VariableDeclarationStatement || ast.expression // for Return, ExpressionStatement, FunctionCall, FunctionCallOptions, MemberAccess || ast.components // for TupleExpression || ast.subExpression // for UnaryOperation || ast.eventCall // for EmitStatement || [] // If 'nodes' is not an array, convert it into one, for example: ast.body if(nodes && !Array.isArray(nodes)) { const tempArr = [] tempArr.push(nodes) nodes = tempArr } // To break object referencing nodes = [...nodes] if(ast.nodes && ast.baseContracts?.length) { // for ContractDefinition nodes.push(...ast.baseContracts) } else if (ast.body && ast.overrides && ast.parameters && ast.returnParameters && ast.modifiers) { // for FunctionDefinition nodes.push(ast.overrides) nodes.push(ast.parameters) nodes.push(ast.returnParameters) nodes.push(ast.modifiers) } else if(ast.typeName) { // for VariableDeclaration, NewExpression, ElementaryTypeNameExpression nodes.push(ast.typeName) } else if (ast.body && ast.overrides && ast.parameters) { // for ModifierDefinition nodes.push(ast.overrides) nodes.push(ast.parameters) } else if (ast.modifierName && ast.arguments) { // for ModifierInvocation nodes.push(ast.modifierName) nodes.push(ast.arguments) } else if (ast.parameterTypes && ast.returnParameterTypes) { // for ModifierInvocation nodes.push(ast.parameterTypes) nodes.push(ast.returnParameterTypes) } else if (ast.keyType && ast.valueType) { // for Mapping nodes.push(ast.keyType) nodes.push(ast.valueType) } else if (ast.baseType && ast.length) { // for ArrayTypeName nodes.push(ast.baseType) nodes.push(ast.length) } else if (ast.AST) { // for InlineAssembly nodes.push(ast.AST) } else if (ast.condition && (ast.trueBody || ast.falseBody || ast.body)) { // for IfStatement, WhileStatement, DoWhileStatement nodes.push(ast.condition) nodes.push(ast.trueBody) nodes.push(ast.falseBody) } else if (ast.parameters && ast.block) { // for TryCatchClause nodes.push(ast.block) } else if (ast.externalCall && ast.clauses) { // for TryStatement nodes.push(ast.externalCall) nodes.push(ast.clauses) } else if (ast.body && ast.condition && ast.initializationExpression && ast.loopExpression) { // for ForStatement nodes.push(ast.condition) nodes.push(ast.initializationExpression) nodes.push(ast.loopExpression) } else if (ast.declarations && ast.initialValue) { // for VariableDeclarationStatement nodes.push(ast.initialValue) } else if (ast.condition && (ast.trueExpression || ast.falseExpression)) { // for Conditional nodes.push(ast.condition) nodes.push(ast.trueExpression) nodes.push(ast.falseExpression) } else if (ast.leftHandSide && ast.rightHandSide) { // for Assignment nodes.push(ast.leftHandSide) nodes.push(ast.rightHandSide) } else if (ast.leftExpression && ast.rightExpression) { // for BinaryOperation nodes.push(ast.leftExpression) nodes.push(ast.rightExpression) } else if (ast.expression && (ast.arguments || ast.options)) { // for FunctionCall, FunctionCallOptions nodes.push(ast.arguments ? ast.arguments : ast.options) } else if (ast.baseExpression && (ast.indexExpression || (ast.startExpression && ast.endExpression))) { // for IndexAccess, IndexRangeAccess nodes.push(ast.baseExpression) if(ast.indexExpression) nodes.push(ast.indexExpression) else { nodes.push(ast.startExpression) nodes.push(ast.endExpression) } } return this.normalizeNodes(nodes) } // eslint-disable-next-line @typescript-eslint/ban-types, @typescript-eslint/explicit-module-boundary-types walk(ast: AstNode, callback?: Function | Record<string, unknown>) { if (ast) { const children: AstNode[] = this.getASTNodeChildren(ast) if (callback) { if (callback instanceof Function) { callback = Object({ "*": callback }); } if (!("*" in callback)) { callback["*"] = function() { return true; }; } if (this.manageCallback(ast, callback) && children?.length) { for (const k in children) { const child = children[k]; this.walk(child, callback); } } } else { if (children?.length) { for (const k in children) { const child = children[k]; this.emit("node", child); this.walk(child); } } } } } // eslint-disable-next-line @typescript-eslint/ban-types, @typescript-eslint/explicit-module-boundary-types walkFullInternal(ast: AstNode, callback: Function) { if (isAstNode(ast)) { // console.log(`XXX id ${ast.id}, nodeType: ${ast.nodeType}, src: ${ast.src}`); callback(ast); for (const k of Object.keys(ast)) { // Possible optimization: // if (k in ['id', 'src', 'nodeType']) continue; const astItem = ast[k]; if (Array.isArray(astItem)) { for (const child of astItem) { if (child) { this.walkFullInternal(child, callback); } } } else { this.walkFullInternal(astItem, callback); } } } } // Normalizes parameter callback and calls walkFullInternal // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types walkFull(ast: AstNode, callback: any) { if (isAstNode(ast)) return this.walkFullInternal(ast, callback); } // eslint-disable-next-line @typescript-eslint/ban-types, @typescript-eslint/explicit-module-boundary-types walkAstList(sourcesList: Node, cb?: Function) { if (cb) { if (sourcesList.ast) { this.walk(sourcesList.ast, cb); } } else { if (sourcesList.ast) { this.walk(sourcesList.ast); } } } } |