Class: TreeHaver::Backends::Psych::Parser

Inherits:
TreeHaver::Base::Parser show all
Defined in:
lib/tree_haver/backends/psych.rb

Overview

Psych parser wrapper

Wraps Psych.parse_stream to provide TreeHaver-compatible parsing.

Examples:

parser = TreeHaver::Backends::Psych::Parser.new
parser.language = Language.yaml
tree = parser.parse(yaml_source)

Instance Attribute Summary

Attributes inherited from TreeHaver::Base::Parser

#language

Instance Method Summary collapse

Methods inherited from TreeHaver::Base::Parser

#backend, #initialize

Constructor Details

This class inherits a constructor from TreeHaver::Base::Parser

Instance Method Details

#parse(source) ⇒ Tree

Parse YAML source code

Parameters:

  • source (String) —

    YAML source to parse

Returns:

  • (Tree) —

    Parsed tree

Raises:

  • (::Psych::SyntaxError) —

    on syntax errors



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# File 'lib/tree_haver/backends/psych.rb', line 137

def parse(source)
  raise 'Language not set' unless language

  Psych.available? or raise 'Psych not available'

  ast = ::Psych.parse_stream(source)
  Tree.new(ast, source)
end

#parse_string(_old_tree, source) ⇒ Tree

Alias for compatibility with tree-sitter API

Parameters:

  • _old_tree (nil) —

    Ignored (Psych doesn't support incremental parsing)

  • source (String) —

    YAML source to parse

Returns:

  • (Tree) —

    Parsed tree



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# File 'lib/tree_haver/backends/psych.rb', line 151

def parse_string(_old_tree, source)
  parse(source)
end