================================================================================
Byte Order Mark
================================================================================
# Comment only.

--------------------------------------------------------------------------------

(stream
 (comment))

================================================================================
Invalid Byte Order Mark
:error
================================================================================
- Invalid use of BOM

- Inside a document.

--------------------------------------------------------------------------------

================================================================================
Block Structure Indicators
================================================================================
sequence:
- one
- two
mapping:
  ? sky
  : blue
  sea : green

--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_mapping
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (block_node
      (block_sequence
       (block_sequence_item
        (flow_node
         (plain_scalar
          (string_scalar))))
       (block_sequence_item
        (flow_node
         (plain_scalar
          (string_scalar)))))))
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (block_node
      (block_mapping
       (block_mapping_pair
        (flow_node
         (plain_scalar
          (string_scalar)))
        (flow_node
         (plain_scalar
          (string_scalar))))
       (block_mapping_pair
        (flow_node
         (plain_scalar
          (string_scalar)))
        (flow_node
         (plain_scalar
          (string_scalar)))))))))))

================================================================================
Flow Collection Indicators
================================================================================
sequence: [ one, two, ]
mapping: { sky: blue, sea: green }

--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_mapping
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (flow_sequence
       (flow_node
        (plain_scalar
         (string_scalar)))
       (flow_node
        (plain_scalar
         (string_scalar))))))
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (flow_mapping
       (flow_pair
        (flow_node
         (plain_scalar
          (string_scalar)))
        (flow_node
         (plain_scalar
          (string_scalar))))
       (flow_pair
        (flow_node
         (plain_scalar
          (string_scalar)))
        (flow_node
         (plain_scalar
          (string_scalar)))))))))))

================================================================================
Comment Indicator
================================================================================
# Comment only.

--------------------------------------------------------------------------------

(stream
 (comment))

================================================================================
Node Property Indicators
================================================================================
anchored: !local &anchor value
alias: *anchor

--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_mapping
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (tag)
      (anchor
       (anchor_name))
      (plain_scalar
       (string_scalar))))
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (alias
       (alias_name))))))))

================================================================================
Block Scalar Indicators
================================================================================
literal: |
  some
  text
folded: >
  some
  text

--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_mapping
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (block_node
      (block_scalar)))
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (block_node
      (block_scalar)))))))

================================================================================
Quoted Scalar Indicators
================================================================================
single: 'text'
double: "text"

--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_mapping
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (single_quote_scalar)))
    (block_mapping_pair
     (flow_node
      (plain_scalar
       (string_scalar)))
     (flow_node
      (double_quote_scalar)))))))

================================================================================
Directive Indicator
================================================================================
%YAML 1.2
--- text

--------------------------------------------------------------------------------

(stream
 (document
  (yaml_directive
   (yaml_version))
  (flow_node
   (plain_scalar
    (string_scalar)))))

================================================================================
Invalid use of Reserved Indicators
:error
================================================================================
commercial-at: @text
grave-accent: `text

--------------------------------------------------------------------------------

================================================================================
Line Break Characters
================================================================================
|
  Line break (no glyph)
  Line break (glyphed)


--------------------------------------------------------------------------------

(stream
 (document
  (block_node
   (block_scalar))))

================================================================================
Tabs and Spaces
================================================================================
# Tabs and spaces
quoted: "Quoted 	"
block:	|
  void main() {
  	printf("Hello, world!\n");
  }

--------------------------------------------------------------------------------

  (stream
   (comment)
   (document
    (block_node
     (block_mapping
      (block_mapping_pair
       (flow_node
        (plain_scalar
         (string_scalar)))
       (flow_node
        (double_quote_scalar)))
      (block_mapping_pair
       (flow_node
        (plain_scalar
         (string_scalar)))
       (block_node
        (block_scalar)))))))

================================================================================
Escaped Characters
================================================================================
"Fun with \\
\" \a \b \e \f
\n \r \t \v \0
\  \_ \N \L \P
\x41 \u0041 \U00000041"

--------------------------------------------------------------------------------

(stream
 (document
  (flow_node
   (double_quote_scalar
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)
    (escape_sequence)))))

================================================================================
Invalid Escaped Characters
:error
================================================================================
Bad escapes:
  "\c
  \xq-"

--------------------------------------------------------------------------------