class `Crystal::Macros::MacroId`
inherits `Crystal::Macros::ASTNode` ¶

A fictitious node representing an identifier like, foo, Bar or something_else.

The parser doesn't create these nodes. Instead, you create them by invoking id on some nodes. For example, invoking id on a StringLiteral returns a MacroId for the string's content. Similarly, invoking ID on a SymbolLiteral, Call, Var and Path returns a MacroId for the node's content.

This allows you to treat strings, symbols, variables and calls uniformly. For example:

macro getter(name)
  def {{name.id}}
    @{{name.id}}
  end
end

getter unicorns
getter :unicorns
getter "unicorns"

All of the above macro calls work because we invoked id, and the generated code looks like this:

def unicorns
  @unicorns
end

If we hadn't used id, the generated code would have been this:

def unicorns
  @unicorns
end

def :unicorns
  @:unicorns
end

def "unicorns"
  @"unicorns"
end

The last two definitions are invalid and so will give a compile-time error.

Methods¶

`#+(other : StringLiteral | CharLiteral) : MacroId` ¶

Similar to String#+.

class Crystal::Macros::MacroId inherits Crystal::Macros::ASTNode ¶

Methods¶

#+(other : StringLiteral | CharLiteral) : MacroId ¶

#=~(range : RegexLiteral) : BoolLiteral ¶

#[](range : RangeLiteral) : MacroId ¶

#capitalize : MacroId ¶

#chars : ArrayLiteral(CharLiteral) ¶

#chomp : MacroId ¶

#downcase : MacroId ¶

#empty? : BoolLiteral ¶

#ends_with?(other : StringLiteral | CharLiteral) : BoolLiteral ¶

#gsub(regex : RegexLiteral, replacement : StringLiteral) : MacroId ¶

#id : MacroId ¶

#includes?(search : StringLiteral | CharLiteral) : BoolLiteral ¶

#lines : ArrayLiteral(StringLiteral) ¶

#size : NumberLiteral ¶

#split(node : ASTNode) : ArrayLiteral(StringLiteral) ¶

#split : ArrayLiteral(StringLiteral) ¶

#starts_with?(other : StringLiteral | CharLiteral) : BoolLiteral ¶

#strip : MacroId ¶

#titleize : MacroId ¶

#tr(from : StringLiteral, to : StringLiteral) : MacroId ¶

#upcase : MacroId ¶

class `Crystal::Macros::MacroId`
inherits `Crystal::Macros::ASTNode` ¶

`#+(other : StringLiteral | CharLiteral) : MacroId` ¶

`#=~(range : RegexLiteral) : BoolLiteral` ¶

`#[](range : RangeLiteral) : MacroId` ¶

`#capitalize : MacroId` ¶

`#chars : ArrayLiteral(CharLiteral)` ¶

`#chomp : MacroId` ¶

`#downcase : MacroId` ¶

`#empty? : BoolLiteral` ¶

`#ends_with?(other : StringLiteral | CharLiteral) : BoolLiteral` ¶

`#gsub(regex : RegexLiteral, replacement : StringLiteral) : MacroId` ¶

`#id : MacroId` ¶

`#includes?(search : StringLiteral | CharLiteral) : BoolLiteral` ¶

`#lines : ArrayLiteral(StringLiteral)` ¶

`#size : NumberLiteral` ¶

`#split(node : ASTNode) : ArrayLiteral(StringLiteral)` ¶

`#split : ArrayLiteral(StringLiteral)` ¶

`#starts_with?(other : StringLiteral | CharLiteral) : BoolLiteral` ¶

`#strip : MacroId` ¶

`#titleize : MacroId` ¶

`#tr(from : StringLiteral, to : StringLiteral) : MacroId` ¶

`#upcase : MacroId` ¶