зеркало из https://github.com/github/ruby.git
100 строки
3.2 KiB
Ruby
100 строки
3.2 KiB
Ruby
# frozen_string_literal: true
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# The Prism Ruby parser.
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#
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# "Parsing Ruby is suddenly manageable!"
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# - You, hopefully
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#
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module Prism
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# There are many files in prism that are templated to handle every node type,
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# which means the files can end up being quite large. We autoload them to make
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# our require speed faster since consuming libraries are unlikely to use all
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# of these features.
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autoload :BasicVisitor, "prism/visitor"
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autoload :Compiler, "prism/compiler"
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autoload :Debug, "prism/debug"
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autoload :DesugarCompiler, "prism/desugar_compiler"
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autoload :Dispatcher, "prism/dispatcher"
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autoload :DotVisitor, "prism/dot_visitor"
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autoload :DSL, "prism/dsl"
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autoload :LexCompat, "prism/lex_compat"
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autoload :LexRipper, "prism/lex_compat"
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autoload :MutationCompiler, "prism/mutation_compiler"
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autoload :NodeInspector, "prism/node_inspector"
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autoload :RipperCompat, "prism/ripper_compat"
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autoload :Pack, "prism/pack"
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autoload :Pattern, "prism/pattern"
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autoload :Serialize, "prism/serialize"
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autoload :Visitor, "prism/visitor"
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# Some of these constants are not meant to be exposed, so marking them as
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# private here.
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private_constant :Debug
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private_constant :LexCompat
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private_constant :LexRipper
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# :call-seq:
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# Prism::lex_compat(source, **options) -> ParseResult
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#
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# Returns a parse result whose value is an array of tokens that closely
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# resembles the return value of Ripper::lex. The main difference is that the
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# `:on_sp` token is not emitted.
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#
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# For supported options, see Prism::parse.
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def self.lex_compat(source, **options)
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LexCompat.new(source, **options).result
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end
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# :call-seq:
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# Prism::lex_ripper(source) -> Array
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#
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# This lexes with the Ripper lex. It drops any space events but otherwise
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# returns the same tokens. Raises SyntaxError if the syntax in source is
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# invalid.
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def self.lex_ripper(source)
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LexRipper.new(source).result
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end
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# :call-seq:
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# Prism::load(source, serialized) -> ParseResult
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#
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# Load the serialized AST using the source as a reference into a tree.
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def self.load(source, serialized)
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Serialize.load(source, serialized)
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end
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# :call-seq:
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# Prism::parse_failure?(source, **options) -> bool
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#
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# Returns true if the source parses with errors.
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def self.parse_failure?(source, **options)
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!parse_success?(source, **options)
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end
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# :call-seq:
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# Prism::parse_file_failure?(filepath, **options) -> bool
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#
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# Returns true if the file at filepath parses with errors.
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def self.parse_file_failure?(filepath, **options)
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!parse_file_success?(filepath, **options)
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end
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end
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require_relative "prism/node"
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require_relative "prism/node_ext"
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require_relative "prism/parse_result"
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require_relative "prism/parse_result/comments"
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require_relative "prism/parse_result/newlines"
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# This is a Ruby implementation of the prism parser. If we're running on CRuby
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# and we haven't explicitly set the PRISM_FFI_BACKEND environment variable, then
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# it's going to require the built library. Otherwise, it's going to require a
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# module that uses FFI to call into the library.
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if RUBY_ENGINE == "ruby" and !ENV["PRISM_FFI_BACKEND"]
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require "prism/prism"
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else
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require_relative "prism/ffi"
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end
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