class Racc::Grammar::PrecedenceDefinitionEnv

Attributes

reverse[R]

Public Class Methods

new(g) click to toggle source

# File racc/grammar.rb, line 366
def initialize(g)
  @grammar = g
  @prechigh_seen = false
  @preclow_seen = false
  @reverse = false
end

Public Instance Methods

higher() click to toggle source

# File racc/grammar.rb, line 375
def higher
  if @prechigh_seen
    raise CompileError, "prechigh used twice"
  end
  @prechigh_seen = true
end

left(*syms) click to toggle source

# File racc/grammar.rb, line 392
def left(*syms)
  @grammar.declare_precedence :Left, syms.map {|s| @grammar.intern(s) }
end

lower() click to toggle source

# File racc/grammar.rb, line 382
def lower
  if @preclow_seen
    raise CompileError, "preclow used twice"
  end
  if @prechigh_seen
    @reverse = true
  end
  @preclow_seen = true
end

nonassoc(*syms) click to toggle source

# File racc/grammar.rb, line 400
def nonassoc(*syms)
  @grammar.declare_precedence :Nonassoc, syms.map {|s| @grammar.intern(s)}
end

right(*syms) click to toggle source

# File racc/grammar.rb, line 396
def right(*syms)
  @grammar.declare_precedence :Right, syms.map {|s| @grammar.intern(s) }
end