Class: YARD::Verifier

### Home Classes Methods

### In Files

- lib/yard/verifier.rb

### Parent

Object

### Methods

- ::new
- #add_expressions
- #call
- #expressions=
- #method_missing
- #run

### Files

- LICENSE.txt
- MIT.txt

### Class/Module Index

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- YARD::Tags::AttributeDirective
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- YARD::Tags::DefaultTag
- YARD::Tags::Directive
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- YARD::Tags::Library
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- YARD::Tags::OverloadTag
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- YARD::Tags::RefTagList
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- YARD::Verifier
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No matching classes.

# YARD::Verifier

Similar to a Proc, but runs a set of Ruby expressions using a small DSL to make tag lookups easier.

The syntax is as follows:

- All syntax is Ruby compatible

- `object` (`o` for short) exist to access the object being verified

- +@TAGNAME+ is translated into +object.tag('TAGNAME')+

- +@@TAGNAME+ is translated into +object.tags('TAGNAME')+

- `object` can be omitted as target for method calls (it is implied)

@example Create a verifier to check for objects that don't have @private tags

    verifier = Verifier.new('!@private')
    verifier.call(object) # => true (no @private tag)

@example Create a verifier to find any return tag with an empty description

    Verifier.new('@return.text.empty?')
    # Equivalent to:
    Verifier.new('object.tag(:return).text.empty?')

@example Check if there are any @param tags

    Verifier.new('@@param.empty?')
    # Equivalent to:
    Verifier.new('object.tags(:param).empty?')

@example Using `object` or `o` to look up object attributes directly

    Verifier.new('object.docstring == "hello world"')
    # Equivalent to:
    Verifier.new('o.docstring == "hello world"')

@example Without using `object` or `o`

    Verifier.new('tag(:return).size == 1 || has_tag?(:author)')

@example Specifying multiple expressions

    Verifier.new('@return', '@param', '@yield')
    # Equivalent to:
    Verifier.new('@return && @param && @yield')

### Constants

NILCLASS_METHODS

  @private

### Attributes

expressions[R]

@return [Array<String>] a list of all expressions the verifier checks for @since 0.5.6

o[R]

@return [CodeObjects::Base] the current object being tested

object[R]

@return [CodeObjects::Base] the current object being tested

### Public Class Methods

new(*expressions) click to toggle source

Creates a verifier from a set of expressions

@param [Array<String>] expressions a list of Ruby expressions to

    parse.

    # File lib/yard/verifier.rb, line 47
    def initialize(*expressions)
      @expressions = []
      add_expressions(*expressions)
    end

### Public Instance Methods

add_expressions(*expressions) click to toggle source

Adds a set of expressions and recompiles the verifier

@param [Array<String>] expressions a list of expressions @return [void] @since 0.5.6

    # File lib/yard/verifier.rb, line 57
    def add_expressions(*expressions)
      self.expressions += expressions.flatten
    end

call(object) click to toggle source

Tests the expressions on the object.

@note If the object is a {CodeObjects::Proxy} the result will always be true. @param [CodeObjects::Base] object the object to verify @return [Boolean] the result of the expressions

    # File lib/yard/verifier.rb, line 75
    def call(object)
      return true if object.is_a?(CodeObjects::Proxy)
      modify_nilclass
      @object = object
      retval = __execute ? true : false
      unmodify_nilclass
      retval
    end

expressions=(value) click to toggle source

    # File lib/yard/verifier.rb, line 38
    def expressions=(value)
      @expressions = value
      create_method_from_expressions
    end

method_missing(sym, *args, &block) click to toggle source

Passes any method calls to the object from the {call}

    # File lib/yard/verifier.rb, line 62
    def method_missing(sym, *args, &block)
      if object.respond_to?(sym)
        object.send(sym, *args, &block)
      else
        super
      end
    end

run(list) click to toggle source

Runs a list of objects against the verifier and returns the subset of verified objects.

@param [Array<CodeObjects::Base>] list a list of code objects @return [Array<CodeObjects::Base>] a list of code objects that match

    the verifier.

    # File lib/yard/verifier.rb, line 90
    def run(list)
      list.reject {|item| call(item).is_a?(FalseClass) }
    end

[Validate]

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