abstract class Crystal::ASTNode

• Crystal::ASTNode
• Reference
• Object

Overview

Base class for nodes in the grammar.

Direct Known Subclasses

• Crystal::Alias
• Crystal::Annotation
• Crystal::AnnotationDef
• Crystal::Arg
• Crystal::ArrayLiteral
• Crystal::Asm
• Crystal::AsmOperand
• Crystal::Assign
• Crystal::AssignWithRestriction
• Crystal::BinaryOp
• Crystal::Block
• Crystal::BoolLiteral
• Crystal::Call
• Crystal::Case
• Crystal::Cast
• Crystal::CharLiteral
• Crystal::ClassDef
• Crystal::ClassVar
• Crystal::ControlExpression
• Crystal::CStructOrUnionDef
• Crystal::Def
• Crystal::EnumDef
• Crystal::ExceptionHandler
• Crystal::Expressions
• Crystal::Extend
• Crystal::ExternalVar
• Crystal::FileNode
• Crystal::FunDef
• Crystal::Generic
• Crystal::Global
• Crystal::HashLiteral
• Crystal::If
• Crystal::ImplicitObj
• Crystal::Include
• Crystal::InstanceVar
• Crystal::IsA
• Crystal::LibDef
• Crystal::Macro
• Crystal::MacroExpression
• Crystal::MacroFor
• Crystal::MacroId
• Crystal::MacroIf
• Crystal::MacroLiteral
• Crystal::MacroVar
• Crystal::MagicConstant
• Crystal::Metaclass
• Crystal::MetaMacroVar
• Crystal::MetaVar
• Crystal::ModuleDef
• Crystal::MultiAssign
• Crystal::NamedArgument
• Crystal::NamedTupleLiteral
• Crystal::NilableCast
• Crystal::NilLiteral
• Crystal::Nop
• Crystal::NumberLiteral
• Crystal::OffsetOf
• Crystal::OpAssign
• Crystal::Path
• Crystal::Primitive
• Crystal::ProcLiteral
• Crystal::ProcNotation
• Crystal::ProcPointer
• Crystal::RangeLiteral
• Crystal::ReadInstanceVar
• Crystal::RegexLiteral
• Crystal::Require
• Crystal::Rescue
• Crystal::RespondsTo
• Crystal::Select
• Crystal::Self
• Crystal::StringInterpolation
• Crystal::StringLiteral
• Crystal::SymbolLiteral
• Crystal::TupleLiteral
• Crystal::TypeDeclaration
• Crystal::TypeDef
• Crystal::TypeFilteredNode
• Crystal::TypeNode
• Crystal::TypeOf
• Crystal::UnaryExpression
• Crystal::Underscore
• Crystal::UninitializedVar
• Crystal::Union
• Crystal::Unless
• Crystal::Unreachable
• Crystal::Until
• Crystal::Var
• Crystal::VisibilityModifier
• Crystal::When
• Crystal::While
• Crystal::Yield
• Crystal::YieldBlockBinder

Defined in:

Class Method Summary

• .class_desc : String

Instance Method Summary

• #accept(visitor)
• #accept_children(visitor)
• #add_observer(observer)
• #at(node : ASTNode)

  Sets this node's location and end location to those of node, and returns self

• #at(location : Location | Nil)

  Updates this node's location and returns self

• #at_end(node : ASTNode)

  Sets this node's end location to those of node and returns self

• #at_end(end_location : Location | Nil)

  Updates this node's end location and returns self

• #bind(from = nil, &)
• #bind_to(node : ASTNode) : Nil
• #bind_to(nodes : Indexable) : Nil
• #class_desc
• #class_name
• #clone

  Returns a deep copy of this node.

• #dependencies : SmallNodeList
• #doc

  Returns the doc comment attached to this node.

• #doc=(doc)

  Attaches a doc comment to this node.

• #enclosing_call : Call | Nil
• #enclosing_call=(enclosing_call : Call | Nil)
• #end_location : Location | Nil

  The location where this node ends, or nil if the location is not known.

• #end_location=(end_location : Location | Nil)

  The location where this node ends, or nil if the location is not known.

• #false_literal?
• #filtered_by(filter)
• #find_owner_trace(program, owner)
• #freeze_type
• #inspect(io : IO) : Nil

  Appends a String representation of this object which includes its class name, its object address and the values of all instance variables.

• #interpret(method : String, args : Array(ASTNode), named_args : Hash(String, ASTNode) | Nil, block : Crystal::Block | Nil, interpreter : Crystal::MacroInterpreter, name_loc : Location | Nil)
• #interpret_compare(other)
• #length : Int32 | Nil

  Returns the number of lines between start and end locations

• #location : Location | Nil

  The location where this node starts, or nil if the location is not known.

• #location=(location : Location | Nil)

  The location where this node starts, or nil if the location is not known.

• #macro_is_a?(macro_type : MacroType) : Bool
• #map_type(type)
• #name_location
• #name_size
• #no_returns?
• #nop?
• #notify_observers
• #pretty_print(pp)
• #propagate
• #raise(message, inner = nil, exception_type = Crystal::TypeException)
• #raise_frozen_type(freeze_type, invalid_type, from)
• #remove_enclosing_call(enclosing_call)
• #remove_observer(observer)
• #restrict_type_to_freeze_type(freeze_type, type)

  Computes the type resulting from assigning type to freeze_type, in the case where freeze_type is not nil.

• #restriction_of?(other : Underscore, owner, self_free_vars = nil, other_free_vars = nil)
• #restriction_of?(other : ASTNode, owner, self_free_vars = nil, other_free_vars = nil)
• #restriction_of?(other : Type, owner, self_free_vars = nil, other_free_vars = nil)
• #restriction_of?(other, owner, self_free_vars = nil, other_free_vars = nil)
• #set_enclosing_call(enclosing_call)
• #set_type(type : Type)
• #set_type(type : Nil)
• #set_type_from(type, from)
• #simple_literal?
• #single_expression

  It yields itself for any node, but Expressions yields first node if it holds only a node.

• #single_expression?

  It yields nil always.

• #stringify
• #supports_autocast?(number_autocast : Bool = true)

  number_autocast defines if casting numeric expressions to larger ones is enabled

• #symbolize
• #to_macro_id
• #to_s(io : IO, macro_expansion_pragmas = nil, emit_doc = false, emit_location_pragmas : Bool = false) : Nil

  Appends a short String representation of this object which includes its class name and its object address.

• #to_string(context)
• #transform(transformer)
• #true_literal?
• #truthy?
• #type
• #type(*, with_autocast = false)
• #type=(type)
• #type?
• #type_from_dependencies : Type | Nil
• #unbind_from(nodes : Nil)
• #unbind_from(node : ASTNode)
• #unbind_from(nodes : Enumerable(ASTNode))
• #update(from = nil)
• #visibility
• #visibility=(visibility : Visibility)
• #warning(message, inner = nil, exception_type = Crystal::TypeException)
• #wrong_number_of(elements, subject, given, expected)
• #wrong_number_of(elements, given, expected)
• #wrong_number_of_arguments(subject, given, expected)
• #wrong_number_of_message(elements, subject, given, expected)
• #wrong_number_of_message(elements, given, expected)

Class Method Detail

Instance Method Detail

class Person
  def initialize(@name : String, @age : Int32)
  end
end

Person.new("John", 32).inspect # => #<Person:0x10fd31f20 @name="John", @age=32>

class Person
  def initialize(@name : String, @age : Int32)
  end
end

Person.new("John", 32).to_s # => #<Person:0x10a199f20>