Method scan

src/backend/function-tracer.js:123–306

* Recursively scans AST for declarations and functions, and add them to their respective context * @param ast

(ast)

   * @param ast
   */
  scan(ast) {
    if (!ast) return;
    if (Array.isArray(ast)) {
      for (let i = 0; i < ast.length; i++) {
        this.scan(ast[i]);
      }
      return;
    }
    switch (ast.type) {
      case 'Program':
        this.useFunctionContext(() => {
          this.scan(ast.body);
        });
        break;
      case 'BlockStatement':
        this.newContext(() => {
          this.scan(ast.body);
        });
        break;
      case 'AssignmentExpression':
      case 'LogicalExpression':
        this.scan(ast.left);
        this.scan(ast.right);
        break;
      case 'BinaryExpression':
        this.scan(ast.left);
        this.scan(ast.right);
        break;
      case 'UpdateExpression':
        if (ast.operator === '++') {
          const declaration = this.getDeclaration(ast.argument.name);
          if (declaration) {
            declaration.suggestedType = 'Integer';
          }
        }
        this.scan(ast.argument);
        break;
      case 'UnaryExpression':
        this.scan(ast.argument);
        break;
      case 'VariableDeclaration':
        if (ast.kind === 'var') {
          this.useFunctionContext(() => {
            ast.declarations = utils.normalizeDeclarations(ast);
            this.scan(ast.declarations);
          });
        } else {
          ast.declarations = utils.normalizeDeclarations(ast);
          this.scan(ast.declarations);
        }
        break;
      case 'VariableDeclarator': {
        const { currentContext } = this;
        const inForLoopInit = this.hasState(states.inForLoopInit);
        const declaration = {
          ast: ast,
          context: currentContext,
          name: ast.id.name,