remove ast walker

libs/remix-debug/src/source/astWalker.js

-'use strict'
-/**
- * Crawl the given AST through the function walk(ast, callback)
- */
-function AstWalker () {} // eslint-disable-line
-
-/**
- * visit all the AST nodes
- *
- * @param {Object} ast  - AST node
- * @param {Object or Function} callback  - if (Function) the function will be called for every node.
- *                                       - if (Object) callback[<Node Type>] will be called for
- *                                         every node of type <Node Type>. callback["*"] will be called for all other nodes.
- *                                         in each case, if the callback returns false it does not descend into children.
- *                                         If no callback for the current type, children are visited.
- */
-AstWalker.prototype.walk = function (ast, callback) {
-  if (callback instanceof Function) {
-    callback = { '*': callback }
-  }
-  if (!('*' in callback)) {
-    callback['*'] = function () { return true }
-  }
-  const nodes = ast.nodes || (ast.body && ast.body.statements) || ast.declarations || ast.statements
-  if (nodes && ast.initializationExpression) { // 'for' loop handling
-    nodes.push(ast.initializationExpression)
-  }
-  if (manageCallBack(ast, callback) && nodes && nodes.length > 0) {
-    for (let k in nodes) {
-      const child = nodes[k]
-      this.walk(child, callback)
-    }
-  }
-}
-
-/**
- * walk the given @astList
- *
- * @param {Object} sourcesList - sources list (containing root AST node)
- * @param {Function} - callback used by AstWalker to compute response
- */
-AstWalker.prototype.walkAstList = function (sourcesList, callback) {
-  const walker = new AstWalker()
-  for (let k in sourcesList) {
-    walker.walk(sourcesList[k].ast, callback)
-  }
-}
-
-function manageCallBack (node, callback) {
-  if (node.nodeType in callback) {
-    return callback[node.nodeType](node)
-  } else {
-    return callback['*'](node)
-  }
-}
-
-module.exports = AstWalker

libs/remix-debug/test/astwalker.js

-'use strict'
-const tape = require('tape')
-const AstWalker = require('../src/source/astWalker')
-const node = require('./resources/ast')
-
-tape('ASTWalker', function (t) {
-  t.test('ASTWalker.walk', function (st) {
-    st.plan(24)
-    const astwalker = new AstWalker()
-
-    astwalker.walk(node.ast.ast, function (node) {
-      if (node.nodeType === 'ContractDefinition') {
-        checkContract(st, node)
-      }
-      if (node.nodeType === 'FunctionDefinition') {
-        checkSetFunction(st, node)
-      }
-      return true
-    })
-
-    const callback = {}
-    callback.FunctionDefinition = function (node) {
-      st.equal(node.nodeType, 'FunctionDefinition')
-      st.equal(node.name === 'set' || node.name === 'get', true)
-      return true
-    }
-    astwalker.walk(node.ast.ast, callback)
-  })
-})
-
-function checkContract (st, node) {
-  st.equal(node.name, 'test')
-  st.equal(node.nodes[0].name, 'x')
-  st.equal(node.nodes[0].typeDescriptions.typeString, 'int256')
-  st.equal(node.nodes[1].name, 'y')
-  st.equal(node.nodes[1].typeDescriptions.typeString, 'int256')
-  st.equal(node.nodes[2].nodeType, 'FunctionDefinition')
-  st.equal(node.nodes[2].stateMutability, 'nonpayable')
-  st.equal(node.nodes[2].name, 'set')
-  st.equal(node.nodes[2].visibility, 'public')
-}
-
-function checkSetFunction (st, node) {
-  if (node.name === 'set') {
-    st.equal(node.parameters.nodeType, 'ParameterList')
-    st.equal(node.returnParameters.nodeType, 'ParameterList')
-    st.equal(node.body.nodeType, 'Block')
-    st.equal(node.body.statements[0].nodeType, 'ExpressionStatement')
-    checkExpressionStatement(st, node.body.statements[0])
-  }
-}
-
-function checkExpressionStatement (st, node) {
-  st.equal(node.expression.nodeType, 'Assignment')
-  st.equal(node.expression.operator, '=')
-  st.equal(node.expression.typeDescriptions.typeString, 'int256')
-  st.equal(node.expression.leftHandSide.nodeType, 'Identifier')
-  st.equal(node.expression.leftHandSide.name, 'x')
-  st.equal(node.expression.rightHandSide.nodeType, 'Identifier')
-  st.equal(node.expression.rightHandSide.name, '_x')
-}