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# frozen_string_literal: true
module SlimLint
# Temple engine used to generate a {Sexp} parse tree for use by linters.
#
# We omit a lot of the filters that are in {Slim::Engine} because they result
# in information potentially being removed from the parse tree (since some
# Sexp abstractions are optimized/removed or otherwise transformed). In order
# for linters to be useful, they need to operate on the original parse tree.
#
# The other key task this engine accomplishes is converting the Array-based
# S-expressions into {SlimLint::Sexp} objects, which have a number of helper
# methods that makes working with them easier. It also annotates these
# {SlimLint::Sexp} objects with line numbers so it's easy to cross reference
# with the original source code.
class Engine < Temple::Engine
filter :Encoding
filter :RemoveBOM
# Parse into S-expression using Slim parser
use Slim::Parser
# Converts Array-based S-expressions into SlimLint::Sexp objects
use SlimLint::Filters::SexpConverter
# Annotates Sexps with line numbers
use SlimLint::Filters::InjectLineNumbers
# Parses the given source code into a Sexp.
#
# @param source [String] source code to parse
# @return [SlimLint::Sexp] parsed Sexp
def parse(source)
call(source)
rescue ::Slim::Parser::SyntaxError => e
# Convert to our own exception type to isolate from upstream changes
error = SlimLint::Exceptions::ParseError.new(e.error,
e.file,
e.line,
e.lineno,
e.column)
raise error
end
end
end
Version data entries
21 entries across 21 versions & 1 rubygems