class Racc::Grammar::PrecedenceDefinitionEnv

属性

reverse[R]

公共类方法

new(g) 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 368
def initialize(g)
  @grammar = g
  @prechigh_seen = false
  @preclow_seen = false
  @reverse = false
end

公共实例方法

higher() 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 377
def higher
  if @prechigh_seen
    raise CompileError, "prechigh used twice"
  end
  @prechigh_seen = true
end

left(*syms) 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 394
def left(*syms)
  @grammar.declare_precedence :Left, syms.map {|s| @grammar.intern(s) }
end

lower() 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 384
def lower
  if @preclow_seen
    raise CompileError, "preclow used twice"
  end
  if @prechigh_seen
    @reverse = true
  end
  @preclow_seen = true
end

nonassoc(*syms) 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 402
def nonassoc(*syms)
  @grammar.declare_precedence :Nonassoc, syms.map {|s| @grammar.intern(s)}
end

right(*syms) 点击切换源代码

# File racc-1.8.1/lib/racc/grammar.rb, line 398
def right(*syms)
  @grammar.declare_precedence :Right, syms.map {|s| @grammar.intern(s) }
end