Class: Prism::Translation::Parser

Inherits:
Parser::Base
  • Object
show all
Defined in:
lib/prism/translation/parser.rb,
lib/prism/translation/parser/lexer.rb,
lib/prism/translation/parser/rubocop.rb,
lib/prism/translation/parser/compiler.rb

Overview

This class is the entry-point for converting a prism syntax tree into the whitequark/parser gem’s syntax tree. It inherits from the base parser for the parser gem, and overrides the parse* methods to parse with prism and then translate.

Defined Under Namespace

Modules: ProcessedSource Classes: Diagnostic

Constant Summary collapse

Racc_debug_parser =

:nodoc:

false
VERSION_3_3 =

This is the special version number that should be used in rubocop configuration files to trigger using prism.

80_82_73_83_77.33

Instance Method Summary collapse

Instance Method Details

#default_encoding ⇒ Object

The default encoding for Ruby files is UTF-8.



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# File 'lib/prism/translation/parser.rb', line 33

def default_encoding
  Encoding::UTF_8
end

#parse(source_buffer) ⇒ Object

Parses a source buffer and returns the AST.



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# File 'lib/prism/translation/parser.rb', line 41

def parse(source_buffer)
  @source_buffer = source_buffer
  source = source_buffer.source

  offset_cache = build_offset_cache(source)
  result = unwrap(Prism.parse(source, filepath: source_buffer.name), offset_cache)

  build_ast(result.value, offset_cache)
ensure
  @source_buffer = nil
end

#parse_with_comments(source_buffer) ⇒ Object

Parses a source buffer and returns the AST and the source code comments.



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# File 'lib/prism/translation/parser.rb', line 54

def parse_with_comments(source_buffer)
  @source_buffer = source_buffer
  source = source_buffer.source

  offset_cache = build_offset_cache(source)
  result = unwrap(Prism.parse(source, filepath: source_buffer.name), offset_cache)

  [
    build_ast(result.value, offset_cache),
    build_comments(result.comments, offset_cache)
  ]
ensure
  @source_buffer = nil
end

#tokenize(source_buffer, _recover = false) ⇒ Object

Parses a source buffer and returns the AST, the source code comments, and the tokens emitted by the lexer.



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# File 'lib/prism/translation/parser.rb', line 71

def tokenize(source_buffer, _recover = false)
  @source_buffer = source_buffer
  source = source_buffer.source

  offset_cache = build_offset_cache(source)
  result = unwrap(Prism.parse_lex(source, filepath: source_buffer.name), offset_cache)

  program, tokens = result.value

  [
    build_ast(program, offset_cache),
    build_comments(result.comments, offset_cache),
    build_tokens(tokens, offset_cache)
  ]
ensure
  @source_buffer = nil
end

#try_declare_numparam(node) ⇒ Object

Since prism resolves num params for us, we don’t need to support this kind of logic here.



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# File 'lib/prism/translation/parser.rb', line 91

def try_declare_numparam(node)
  node.children[0].match?(/\A_[1-9]\z/)
end

#version ⇒ Object

:nodoc:



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# File 'lib/prism/translation/parser.rb', line 28

def version # :nodoc:
  34
end

#yyerror ⇒ Object

:nodoc:



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# File 'lib/prism/translation/parser.rb', line 37

def yyerror # :nodoc:
end