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Contents
require 'jsduck/js/rkelly_adapter'
require 'jsduck/js/associator'
require 'rkelly'
module JsDuck
module Js
# A JavaScript parser implementation that uses RKelly and adapts
# its output to be the same as the old Esprima parser used to
# produce.
class Parser
ADAPTER = Js::RKellyAdapter.new
def initialize(input, options={})
@input = input
end
# Parses JavaScript source code with RKelly, turns RKelly AST
# into Esprima AST, and associate comments with syntax nodes.
def parse
parser = RKelly::Parser.new
ast = parser.parse(@input)
unless ast
raise syntax_error(parser)
end
ast = ADAPTER.adapt(ast)
# Adjust Program node range
ast["range"] = [0, @input.length-1]
return Js::Associator.new(@input).associate(ast)
end
def syntax_error(parser)
token = parser.stopped_at
if token
"Invalid JavaScript syntax: Unexpected '#{token.value}' on line #{token.range.from.line}"
else
"Invalid JavaScript syntax: Unexpected end of file"
end
end
end
end
end
Version data entries
24 entries across 24 versions & 3 rubygems