Class: Fmt::Parser

Inherits:

Object

• Object
• Fmt::Parser

Defined in:

lib/fmt/parsers/parser.rb

Overview

Responsible for parsing various inputs and returning an AST (Abstract Syntax Tree)

Mechanics are similar to an ETL pipeline (Extract, Transform, Load), however, parsers only handle extracting and transforming.

Loading is handled by AST processors (Models)

See Also:

• lib/fmt/models/

Direct Known Subclasses

ArgumentsParser, EmbedParser, MacroParser, PipelineParser, TemplateParser

Constant Summary

Cache =

: Fmt::LRUCache – local in-memory cache

Fmt::LRUCache.new

Class Method Summary

• .esc(value) ⇒ Object

  Escapes a string for use in a regular expression.

Instance Method Summary

• #parse ⇒ Object

  Parses input passed to the constructor and returns an AST (Abstract Syntax Tree).

Class Method Details

.esc(value) ⇒ Object

Escapes a string for use in a regular expression

# File 'lib/fmt/parsers/parser.rb', line 19

def self.esc(value) = Regexp.escape(value.to_s)

Instance Method Details

#parse ⇒ Object

Note:

Subclasses must implement the extract and transform methods

Parses input passed to the constructor and returns an AST (Abstract Syntax Tree)

1. Extract components

2. Transform to AST

# File 'lib/fmt/parsers/parser.rb', line 29

def parse
  extract.then { transform(**_1) }
end