runtime/syntax/testdir/input/yaml.yaml

%YAML 1.2
%TAG !      tag:yaml.org,2002: # primary tag handle
%TAG !!     tag:yaml.org,2002: # secondary tag handle
%TAG !yaml! tag:yaml.org,2002: # named tag handle
---
- !str 0      # primary tag handle
- !!str 0     # secondary tag handle
- !yaml!str 0 # named tag handle
---

boolean: [false, true, FALSE, TRUE, False, True]
null: [null, ~,]
integer: [12345, -12_345, +12_345]
float: [
  12345.15, -12_345.15, +12_345.15, 1.23015e+3,
  -12_345.15e+10, +12_345.15e-10, 1.234_515e-10
]
binary: [0b101010, -0b1010_1010, +0b1010_1010]
octal: [0777, 0o777, +0777, -0o777]
hexadecimal: [0xFEFF_0000, -0xabcd_ef00, +0x1234_5678]
sexagesimal: [10:20:30, -19:29:39, +19:29:39]
infinity: [.inf, -.Inf, +.INF]
not a number: [.nan, .NaN, .NAN]

plain strings:
  - a b c
  - a:b & c @ d# e * f # comment
  - {{ f(' ') }} #8234
double quoted strings:
  - ""
  - "a b c": "d e f" # comment
  - "\\\"\a\b\f\n\r\t\v\0\_\ \N\L\P\x41\u0041\U00000041"
single quoted strings:
  - ''
  - 'a b c': 'd e f' # comment
  - 'a''b''c'

block folded string: >
  foo
  bar: 1

    baz: null

  "qux"
block literal string: |
  foo
  bar: 1

    baz: null

  'qux'

chomping strings:
  - block folded string: >- # comment
      foo
      bar: 1
  - block literal string: |+ # comment
      foo
      bar: 1
  - |- #11517
      foo "\"
      bar: 1
block indentation indicator:
  - block folded string: >1 # comment
     foo
     bar: 1
  - block literal string: |1- # comment
     foo
     bar: 1
  - |-1 # comment
     foo
     bar: 1

flow collection:
  empty sequence: []
  empty mapping: {}
  flow sequence: [foo, bar, baz]
  flow mapping: {foo: bar, baz: qux}
  flow string:
    foo
    bar
    baz
  "double quoted \" string": "
    foo
    bar
    baz"
  'single quoted '' string': '
    foo
    bar
    baz'
  inside block mapping:
    foo: {bar: baz}
    bar: ["foo": {baz: qux}]
  flow:collection: [foo # comment
    , {bar: [{ # comment
      baz:
      '
        qux # not comment
      ' # comment
    }]}]

explicit mapping:
  ? foo # comment
  : bar # comment
  ? - foo
    - bar
  : - baz
    - qux
  ? [1, 2, 3]
  : ? 1
    : one
    ? 2
    : - ? 3
        : three
      - {?4: four, ? 5: five, ? # comment
        6: # comment
        {7:seven}}

mapping merge:
  foo: &foo
    bar: baz
  bar:
    <<: *foo
    baz: &bar
      foo: [*foo]
    qux:
      <<: [*foo, *bar]
  baz: {<<: *foo, qux: [{<< : *foo}]}