abstract class Crystal::Macros::ASTNode
inherits Reference

This is the base class of all AST nodes. This methods are available to all AST nodes.

Direct known subclasses

Crystal::Macros::Annotation Crystal::Macros::Arg Crystal::Macros::ArrayLiteral Crystal::Macros::Assign Crystal::Macros::BinaryOp Crystal::Macros::Block Crystal::Macros::BoolLiteral Crystal::Macros::Call Crystal::Macros::Case Crystal::Macros::Cast Crystal::Macros::CharLiteral Crystal::Macros::ClassDef Crystal::Macros::ClassVar Crystal::Macros::Def Crystal::Macros::Expressions Crystal::Macros::Generic Crystal::Macros::Global Crystal::Macros::HashLiteral Crystal::Macros::If Crystal::Macros::ImplicitObj Crystal::Macros::InstanceVar Crystal::Macros::IsA Crystal::Macros::Macro Crystal::Macros::MacroId Crystal::Macros::MetaVar Crystal::Macros::MultiAssign Crystal::Macros::NamedArgument Crystal::Macros::NamedTupleLiteral Crystal::Macros::NilableCast Crystal::Macros::NilLiteral Crystal::Macros::Nop Crystal::Macros::NumberLiteral Crystal::Macros::OffsetOf Crystal::Macros::Path Crystal::Macros::ProcLiteral Crystal::Macros::ProcNotation Crystal::Macros::ProcPointer Crystal::Macros::RangeLiteral Crystal::Macros::ReadInstanceVar Crystal::Macros::RegexLiteral Crystal::Macros::Require Crystal::Macros::RespondsTo Crystal::Macros::Splat Crystal::Macros::StringInterpolation Crystal::Macros::StringLiteral Crystal::Macros::SymbolLiteral Crystal::Macros::TupleLiteral Crystal::Macros::TypeDeclaration Crystal::Macros::TypeNode Crystal::Macros::UnaryExpression Crystal::Macros::UninitializedVar Crystal::Macros::Union Crystal::Macros::Var Crystal::Macros::VisibilityModifier Crystal::Macros::When Crystal::Macros::While

Methods

#!=(other : ASTNode) : BoolLiteral

Returns true if this node's textual representation is not the same as the other node.

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#==(other : ASTNode) : BoolLiteral

Returns true if this node's textual representation is the same as the other node.

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#class_name : StringLiteral

Returns a StringLiteral that contains this node's name.

macro test
  {{ "foo".class_name }}
end

puts test # => prints StringLiteral

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#column_number : StringLiteral | NilLiteral

Returns the column number where this node begins. Might return nil if the location is not known.

The first column number in a line is 1.

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#end_column_number : StringLiteral | NilLiteral

Returns the column number where this node ends. Might return nil if the location is not known.

The first column number in a line is 1.

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#end_line_number : StringLiteral | NilLiteral

Returns the line number where this node ends. Might return nil if the location is not known.

The first line number in a file is 1.

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#filename : StringLiteral | NilLiteral

Returns the filename where this node is located. Might return nil if the location is not known.

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#id : MacroId

Returns this node as a MacroId. Useful when you need an identifier out of a StringLiteral, SymbolLiteral, Var or Call.

macro define_method(name, content)
  def {{name.id}}
    {{content}}
  end
end

define_method :foo, 1
define_method "bar", 2
define_method baz, 3

puts foo # => prints 1
puts bar # => prints 2
puts baz # => prints 3

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#line_number : StringLiteral | NilLiteral

Returns the line number where this node begins. Might return nil if the location is not known.

The first line number in a file is 1.

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#raise(message) : NoReturn

Gives a compile-time error with the given message. This will highlight this node in the error message.

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#stringify : StringLiteral

Returns a StringLiteral that contains this node's textual representation. Note that invoking stringify on a string literal will return a StringLiteral that contains a string literal.

macro test
  {{ "foo".stringify }}
end

puts test # prints "foo" (including the double quotes)

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#symbolize : SymbolLiteral

Returns a SymbolLiteral that contains this node's textual representation.

{{ "foo".id.symbolize }} # => :foo

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