Class: Idl::AryAccessSyntaxNode

Inherits:
Treetop::Runtime::SyntaxNode show all
Defined in:
lib/idl/ast.rb

Overview

this is not used as an AST node; we use it split chained array accesses

For example, it helps us represent

X[rs1][31:0]

Instance Method Summary collapse

Instance Method Details

#to_ast ⇒ AstNode

fix up left recursion

Returns:

  • (AstNode) —

    New tree rooted at the array access



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# File 'lib/idl/ast.rb', line 1462

def to_ast
  var = a.to_ast
  brackets.elements.each do |bracket|
    var =
      if bracket.msb.empty?
        AryElementAccessAst.new(input, interval, var, bracket.lsb.to_ast)
      else
        AryRangeAccessAst.new(input, interval, var,
                              bracket.msb.expression.to_ast, bracket.lsb.to_ast)
      end
  end

  var
end

#to_idl ⇒ String

Return valid IDL representation of the node (and its subtree)

Returns:

  • (String) —

    IDL code for the node



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# File 'lib/idl/ast.rb', line 1478

def to_idl
  if bracket.msb.empty?
    "#{a.to_idl}[#{brackets.lsb.to_idl}]"
  else
    "#{a.to_idl}[#{brackets.msb.to_idl}:#{brackets.lsb.to_idl}]"
  end
end