Examples of com.google.dart.engine.ast.DefaultFormalParameter

com.google.dart.engine.ast.DefaultFormalParameter
Instances of the class {@code DefaultFormalParameter} represent a formal parameter with a defaultvalue. There are two kinds of parameters that are both represented by this class: named formal parameters and positional formal parameters.
```
 defaultFormalParameter ::= {@link NormalFormalParameter normalFormalParameter} ('=' {@link Expression defaultValue})? defaultNamedParameter ::= {@link NormalFormalParameter normalFormalParameter} (':' {@link Expression defaultValue})? 
```
@coverage dart.engine.ast

      NodeList<ConstructorInitializer> initializers = declaration.getInitializers();
      ConstructorElementImpl constructor = (ConstructorElementImpl) declaration.getElement();
      constructor.setConstantInitializers(new InitializerCloner().cloneNodeList(initializers));
    } else if (constNode instanceof FormalParameter) {
      if (constNode instanceof DefaultFormalParameter) {
        DefaultFormalParameter parameter = ((DefaultFormalParameter) constNode);
        ParameterElement element = parameter.getElement();
        Expression defaultValue = parameter.getDefaultValue();
        if (defaultValue != null) {
          EvaluationResultImpl result = defaultValue.accept(createConstantVisitor());
          ((ParameterElementImpl) element).setEvaluationResult(result);
        }
      }

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    if (parameters == null) {
      return;
    }
    for (FormalParameter parameter : parameters.getParameters()) {
      if (parameter instanceof DefaultFormalParameter) {
        DefaultFormalParameter defaultParameter = (DefaultFormalParameter) parameter;
        Expression defaultValue = defaultParameter.getDefaultValue();
        if (defaultValue != null) {
          EvaluationResultImpl result = validate(
              defaultValue,
              CompileTimeErrorCode.NON_CONSTANT_DEFAULT_VALUE);
          VariableElementImpl element = (VariableElementImpl) parameter.getElement();

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    boolean result = false;
    FormalParameterList formalParameterList = node.getParameters();
    NodeList<FormalParameter> parameters = formalParameterList.getParameters();
    for (FormalParameter formalParameter : parameters) {
      if (formalParameter instanceof DefaultFormalParameter) {
        DefaultFormalParameter defaultFormalParameter = (DefaultFormalParameter) formalParameter;
        if (defaultFormalParameter.getDefaultValue() != null) {
          errorReporter.reportErrorForNode(
              CompileTimeErrorCode.DEFAULT_VALUE_IN_FUNCTION_TYPE_ALIAS,
              node);
          result = true;
        }

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Related Classes of com.google.dart.engine.ast.DefaultFormalParameter

com.google.dart.engine.internal.constant.ConstantValueComputer

com.google.dart.engine.internal.verifier.ConstantVerifier

com.google.dart.engine.internal.verifier.ErrorVerifier

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