solhint/lib/rules/deprecations/constructor-syntax.js

Solidity Code Linter

const BaseDeprecation = require('./base-deprecation')
const TreeTraversing = require('./../../common/tree-traversing')

const traversing = new TreeTraversing()

class ConstructorSyntax extends BaseDeprecation {
  deprecationVersion() {
    return '0.4.22'
  }

  exitFunctionDefinition(ctx) {
    if (this.active) {
      const contract = traversing.findParentType(ctx, 'ContractDefinitionContext')
      const contractName = contract.children[1].getText()
      const functionName = ctx.children[1].getText()
      if (functionName === contractName) {
        this.warn(ctx, 'constructor-syntax', 'Constructors should use the new constructor keyword.')
      }
    }
  }

  exitConstructorDefinition(ctx) {
    if (!this.active) {
      const message = 'Constructor keyword not available before 0.4.22 (' + this.version + ')'
      this.error(ctx, 'constructor-syntax', message)
    }
  }
}

module.exports = ConstructorSyntax