Class: Strling::Core::Compiler

Inherits:
Object
  • Object
show all
Defined in:
lib/strling/core/compiler.rb

Overview

Compiler class for transforming AST to IR

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.compile(node) ⇒ IROp

Compile an AST node tree to IR

Parameters:

  • node (Node) —

    The root AST node to compile

Returns:

  • (IROp) —

    The compiled IR root node



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# File 'lib/strling/core/compiler.rb', line 26

def self.compile(node)
  new.compile_node(node)
end

Instance Method Details

#compile_node(node) ⇒ IROp

Compile a single AST node to its IR equivalent

Parameters:

  • node (Node) —

    The AST node to compile

Returns:

  • (IROp) —

    The corresponding IR node



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# File 'lib/strling/core/compiler.rb', line 34

def compile_node(node)
  case node
  when Alt
    IRAlt.new(node.branches.map { |b| compile_node(b) })
  when Seq
    IRSeq.new(node.parts.map { |p| compile_node(p) })
  when Lit
    IRLit.new(node.value)
  when Dot
    IRDot.new
  when Anchor
    IRAnchor.new(node.at)
  when CharClass
    IRCharClass.new(
      node.negated,
      node.items.map { |item| compile_class_item(item) }
    )
  when Quant
    IRQuant.new(
      compile_node(node.child),
      node.min,
      node.max,
      node.mode
    )
  when Group
    IRGroup.new(
      node.capturing,
      compile_node(node.body),
      name: node.name,
      atomic: node.atomic
    )
  when Backref
    IRBackref.new(by_index: node.by_index, by_name: node.by_name)
  when Look
    IRLook.new(node.dir, node.neg, compile_node(node.body))
  else
    raise "Unknown AST node type: #{node.class}"
  end
end