Class: Patm::Pattern::Hash
Instance Method Summary
collapse
#&, #[], build_from, #compile, #opt, #opt?, #rest?
Constructor Details
#initialize(hash, exact) ⇒ Hash
Returns a new instance of Hash.
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# File 'lib/patm.rb', line 120
def initialize(hash, exact)
@pat = hash
@exact = exact
@non_opt_count = @pat.values.count{|v| !v.opt? }
end
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Instance Method Details
#compile_internal(free_index, target_name = "_obj") ⇒ Object
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# File 'lib/patm.rb', line 138
def compile_internal(free_index, target_name = "_obj")
i = free_index
ctxs = []
src = []
ctxs << [@pat]
i += 1
pat = "_ctx[#{free_index}]"
src << "#{target_name}.is_a?(::Hash)"
src << "#{target_name}.size >= #{@non_opt_count}"
if @exact
src << "#{target_name}.keys.all?{|k| #{pat}.has_key?(k) }"
end
tname = "#{target_name}_elm"
@pat.each do|k, v|
key_src, c, i = Util.compile_value(k, i)
ctxs << c
s, c, i = v.compile_internal(i, tname)
body =
if s
"(#{tname} = #{target_name}[#{key_src}]; #{s})"
else
"true"
end
src <<
if v.opt?
"(!#{target_name}.has_key?(#{key_src}) || #{body})"
else
"(#{target_name}.has_key?(#{key_src}) && #{body})"
end
ctxs << c
end
[
src.join(" &&\n"),
ctxs.flatten(1),
i,
]
end
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#execute(match, obj) ⇒ Object
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# File 'lib/patm.rb', line 125
def execute(match, obj)
return false unless obj.is_a?(::Hash)
obj.size >= @non_opt_count &&
(!@exact || obj.keys.all?{|k| @pat.has_key?(k) }) &&
@pat.all? {|k, pat|
if obj.has_key?(k)
pat.execute(match, obj[k])
else
pat.opt?
end
}
end
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#inspect ⇒ Object
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# File 'lib/patm.rb', line 137
def inspect; @pat.inspect; end
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