Class: Psych::Nodes::Sequence

Inherits:
Node show all
Defined in:
lib/psych/nodes/sequence.rb

Overview

This class represents a YAML sequence.

A YAML sequence is basically a list, and looks like this:

%YAML 1.1
---
- I am
- a Sequence

A YAML sequence may have an anchor like this:

%YAML 1.1
---
&A [
  "This sequence",
  "has an anchor"
]

A YAML sequence may also have a tag like this:

%YAML 1.1
---
!!seq [
  "This sequence",
  "has a tag"
]

This class represents a sequence in a YAML document. A Psych::Nodes::Sequence node may have 0 or more children. Valid children for this node are:

  • Psych::Nodes::Sequence

  • Psych::Nodes::Mapping

  • Psych::Nodes::Scalar

  • Psych::Nodes::Alias

Constant Summary collapse

ANY =

Any Styles, emitter chooses

0
BLOCK =

Block style sequence

1
FLOW =

Flow style sequence

2

Instance Attribute Summary collapse

Attributes inherited from Node

#children, #end_column, #end_line, #start_column, #start_line

Instance Method Summary collapse

Methods inherited from Node

#alias?, #document?, #each, #mapping?, #scalar?, #stream?, #to_ruby, #yaml

Constructor Details

#initialize(anchor = nil, tag = nil, implicit = true, style = BLOCK) ⇒ Sequence

Create a new object representing a YAML sequence.

anchor is the anchor associated with the sequence or nil. tag is the tag associated with the sequence or nil. implicit a boolean indicating whether or not the sequence was implicitly started. style is an integer indicating the list style.

See Psych::Handler#start_sequence



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# File 'lib/psych/nodes/sequence.rb', line 73

def initialize anchor = nil, tag = nil, implicit = true, style = BLOCK
  super()
  @anchor   = anchor
  @tag      = tag
  @implicit = implicit
  @style    = style
end

Instance Attribute Details

#anchor ⇒ Object

The anchor for this sequence (if any)



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# File 'lib/psych/nodes/sequence.rb', line 52

def anchor
  @anchor
end

#implicit ⇒ Object

Is this sequence started implicitly?



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# File 'lib/psych/nodes/sequence.rb', line 58

def implicit
  @implicit
end

#style ⇒ Object

The sequence style used



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# File 'lib/psych/nodes/sequence.rb', line 61

def style
  @style
end

#tag ⇒ Object

The tag name for this sequence (if any)



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# File 'lib/psych/nodes/sequence.rb', line 55

def tag
  @tag
end

Instance Method Details

#sequence? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/psych/nodes/sequence.rb', line 81

def sequence?; true; end