Class: Gitlab::Ci::Pipeline::Expression::Lexer

Inherits:
Object
  • Object
show all
Includes:
Utils::StrongMemoize
Defined in:
lib/gitlab/ci/pipeline/expression/lexer.rb

Constant Summary collapse

SyntaxError = 
Class.new(Expression::ExpressionError)
LEXEMES = 
[
  Expression::Lexeme::ParenthesisOpen,
  Expression::Lexeme::ParenthesisClose,
  Expression::Lexeme::Variable,
  Expression::Lexeme::String,
  Expression::Lexeme::Pattern,
  Expression::Lexeme::Null,
  Expression::Lexeme::Equals,
  Expression::Lexeme::Matches,
  Expression::Lexeme::NotEquals,
  Expression::Lexeme::NotMatches,
  Expression::Lexeme::And,
  Expression::Lexeme::Or
].freeze
MAX_TOKENS = 
100

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Utils::StrongMemoize

#clear_memoization, #strong_memoize, #strong_memoized?

Constructor Details

#initialize(statement, max_tokens: MAX_TOKENS) ⇒ Lexer

Returns a new instance of Lexer.


33
34
35
36
 
# File 'lib/gitlab/ci/pipeline/expression/lexer.rb', line 33

def initialize(statement, max_tokens: MAX_TOKENS)
  @scanner = StringScanner.new(statement)
  @max_tokens = max_tokens
end

Class Method Details

.lexemes ⇒ Object 


27
28
29
 
# File 'lib/gitlab/ci/pipeline/expression/lexer.rb', line 27

def self.lexemes
  LEXEMES
end

Instance Method Details

#lexemes ⇒ Object 


42
43
44
 
# File 'lib/gitlab/ci/pipeline/expression/lexer.rb', line 42

def lexemes
  tokens.map(&:to_lexeme)
end

#tokens ⇒ Object 


38
39
40
 
# File 'lib/gitlab/ci/pipeline/expression/lexer.rb', line 38

def tokens
  strong_memoize(:tokens) { tokenize }
end