class Crygen::Types::Macro

• Crygen::Types::Macro
• Crygen::Interfaces::GeneratorInterface
• Reference
• Object

Overview

A class that generates a macro

macro_type = CGT::Macro.new("example")
macro_type.add_arg("name")
puts macro_type.generate

Output:

macro example(name)
  puts {{ name }}
end

Defined in:

Constructors

• .new(name : String)

Class Method Summary

• .for_loop(name : String, iterator : String, &) : String

  Generates a for loop macro.

• .if(expression : String, &) : String

  Generates an if condition macro.

• .unless(expression : String, &) : String

  Generates an unless condition macro.

• .verbatim(&) : String

  Generates a verbatim macro.

Instance Method Summary

• #add_arg(arg : String) : self

  Adds an argument to the macro.

• #add_body(line : String) : self

  Adds a new line into the macro body.

• #body=(body : String) : self

  Write the macro body.

• #generate : String

  Generates the macro.

• #to_s(io : IO) : Nil

  Generate a macro thanks to #to_s method.

Constructor Detail

Class Method Detail

Crygen::Types::Macro.for_loop("item", "items") do |str, indent|
  str << indent << "puts {{ item }}\n"
end

{% for item in items %}
  puts {{ item }}
{% end %}

Crygen::Types::Macro.if("x > 0") do |str, indent|
  str << indent << "puts \"positive\"\n"
end

{% for item in items %}
  puts "positive"
{% end %}

Crygen::Types::Macro.unless("x > 0") do |str, indent|
  str << indent << "puts \"negative or zero\"\n"
end

{% unless x > 0 %}
  puts \"negative or zero\"
{% end %}

Crygen::Types::Macro.verbatim do |str, indent|
  str << indent << "puts 123\n"
end

{% verbatim do %}
  puts 123
{% end %}

Instance Method Detail

macro_type = CGT::Macro.new("example")
macro_type.add_arg("name")

macro example(name)
end

macro_type = CGT::Macro.new("example")
macro_type.add_arg("name")
macro_type.add_body("puts {{ name }}")

macro example(name)
  puts {{ name }}
end

macro_type = CGT::Macro.new("example")
macro_type.add_arg("name")
macro_type.body = "puts {{ name }}"

macro example(name)
  puts {{ name }}
end