66 lines
1.4 KiB
Ruby
66 lines
1.4 KiB
Ruby
# frozen_string_literal: true
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module Rpl
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module Lang
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class Dictionary
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attr_reader :vars,
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:local_vars_layers
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def initialize
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@parser = Parser.new
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@words = {}
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@vars = {}
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@local_vars_layers = []
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end
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def add( name, implementation )
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@words[ name ] = implementation
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end
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def add_var( name, implementation )
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@vars[ name ] = implementation
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end
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def remove_vars( names )
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names.each { |name| @vars.delete( name ) }
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end
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def remove_var( name )
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remove_vars( [name] )
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end
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def remove_all_vars
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@vars = {}
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end
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def add_local_vars_layer
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@local_vars_layers << {}
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end
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def add_local_var( name, implementation )
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@local_vars_layers.last[ name ] = implementation
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end
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def remove_local_vars( names )
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names.each { |name| @local_vars_layers.last.delete( name ) }
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end
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def remove_local_var( name )
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remove_local_vars( [name] )
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end
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def remove_local_vars_layer
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@local_vars_layers.pop
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end
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def lookup( name )
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local_var = @local_vars_layers.reverse.find { |layer| layer[ name ] }
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word = local_var.nil? ? nil : local_var[name]
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word ||= @vars[ name ]
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word ||= @words[ name ]
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word
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end
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end
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end
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end
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