YamlReference-0.9: Text/Yaml/Reference.bnf
-- ** Spec productions!
--
-- These are copied directly from the spec, with the sprinkling of
-- additional token and decision point directives.
-- 5.1 Character Set
c_printable {- 1 -} = '\x9' / '\xA' / '\xD' / ('\x20', '\x7E')
/ '\x85' / ('\xA0', '\xD7FF') / ('\xE000', '\xFFFD')
/ ('\x10000', '\x10FFFF')
-- 5.2 Character Encodings
c_byte_order_mark {- 2 -} = '\xFEFF' & detect_utf_encoding
-- 5.3 Indicator Characters
c_sequence_entry {- 3 -} = indicator '-'
c_mapping_key {- 4 -} = indicator '?'
c_mapping_value {- 5 -} = indicator ':'
c_collect_entry {- 6 -} = indicator ','
c_sequence_start {- 7 -} = indicator '['
c_sequence_end {- 8 -} = indicator ']'
c_mapping_start {- 9 -} = indicator '{'
c_mapping_end {- 10 -} = indicator '}'
c_comment {- 11 -} = indicator '#'
c_anchor {- 12 -} = indicator '&'
c_alias {- 13 -} = indicator '*'
c_tag {- 14 -} = indicator '!'
c_literal {- 15 -} = indicator '|'
c_folded {- 16 -} = indicator '>'
c_single_quote {- 17 -} = indicator '\''
c_double_quote {- 18 -} = indicator '"'
c_directive {- 19 -} = indicator '%'
c_reserved {- 20 -} = indicator ( '@' / '`' )
c_indicator {- 21 -} = c_sequence_entry / c_mapping_key / c_mapping_value / c_collect_entry
/ c_sequence_start / c_sequence_end / c_mapping_start / c_mapping_end
/ c_comment / c_anchor / c_alias / c_tag
/ c_literal / c_folded / c_single_quote / c_double_quote
/ c_directive / c_reserved
-- 5.4 Line Break Characters
b_line_feed {- 22 -} = '\xA'
b_carriage_return {- 23 -} = '\xD'
b_next_line {- 24 -} = '\x85'
b_line_separator {- 25 -} = '\x2028'
b_paragraph_separator {- 26 -} = '\x2029'
b_char {- 27 -} = b_line_feed / b_carriage_return / b_next_line
/ b_line_separator / b_paragraph_separator
nb_char {- 28 -} = c_printable - b_char
b_specific {- 29 -} = ( b_line_separator / b_paragraph_separator )
& nextLine
b_generic {- 30 -} = ( b_carriage_return & b_line_feed
/ b_carriage_return
/ b_line_feed
/ b_next_line )
& nextLine
b_as_line_feed {- 31 -} = token LineFeed b_generic
b_normalized {- 32 -} = b_as_line_feed / token Break b_specific
b_non_content_generic {- 33 -} = token Continue b_generic
b_non_content_any {- 34 -} = b_non_content_generic / token Continue b_specific
-- 5.5 White Space Characters
s_space {- 35 -} = '\x20'
s_tab {- 36 -} = '\x9'
s_white {- 37 -} = s_space / s_tab
ns_char {- 38 -} = nb_char - s_white
-- 5.6 Miscellaneous Characters
ns_dec_digit {- 39 -} = ('\x30', '\x39')
ns_hex_digit {- 40 -} = ns_dec_digit
/ ('\x41', '\x46') / ('\x61', '\x66')
ns_ascii_letter {- 41 -} = ('\x41', '\x5A') / ('\x61', '\x7A')
ns_word_char {- 42 -} = ns_dec_digit / ns_ascii_letter / '-'
ns_uri_char {- 43 -} = "escape"
^ ( ns_word_char
/ '%' ! "escape" & ns_hex_digit & ns_hex_digit
/ ';' / '/' / '?' / ':' / '@' / '&' / '=' / '+' / '$' / ','
/ '_' / '.' / '!' / '~' / '*' / '\'' / '(' / ')' / '[' / ']' )
ns_tag_char {- 44 -} = ns_uri_char - c_tag
-- 5.7 Escaped Characters
c_escape {- 45 -} = indicator '\\'
ns_esc_null {- 46 -} = meta '0'
ns_esc_bell {- 47 -} = meta 'a'
ns_esc_backspace {- 48 -} = meta 'b'
ns_esc_horizontal_tab {- 49 -} = meta ( 't' / '\x9' )
ns_esc_line_feed {- 50 -} = meta 'n'
ns_esc_vertical_tab {- 51 -} = meta 'v'
ns_esc_form_feed {- 52 -} = meta 'f'
ns_esc_carriage_return {- 53 -} = meta 'r'
ns_esc_escape {- 54 -} = meta 'e'
ns_esc_space {- 55 -} = meta '\x20'
ns_esc_double_quote {- 56 -} = meta '"'
ns_esc_backslash {- 57 -} = meta '\\'
ns_esc_next_line {- 58 -} = meta 'N'
ns_esc_non_breaking_space {- 59 -} = meta '_'
ns_esc_line_separator {- 60 -} = meta 'L'
ns_esc_paragraph_separator {- 61 -} = meta 'P'
ns_esc_8_bit {- 62 -} = indicator 'x' ! "escaped" & meta ( ns_hex_digit % 2 )
ns_esc_16_bit {- 63 -} = indicator 'u' ! "escaped" & meta ( ns_hex_digit % 4 )
ns_esc_32_bit {- 64 -} = indicator 'U' ! "escaped" & meta ( ns_hex_digit % 8 )
c_ns_esc_char {- 65 -} = nest BeginEscape
& c_escape ! "escape"
& "escaped"
^ ( ns_esc_null
/ ns_esc_bell
/ ns_esc_backspace
/ ns_esc_horizontal_tab
/ ns_esc_line_feed
/ ns_esc_vertical_tab
/ ns_esc_form_feed
/ ns_esc_carriage_return
/ ns_esc_escape
/ ns_esc_space
/ ns_esc_double_quote
/ ns_esc_backslash
/ ns_esc_next_line
/ ns_esc_non_breaking_space
/ ns_esc_line_separator
/ ns_esc_paragraph_separator
/ ns_esc_8_bit
/ ns_esc_16_bit
/ ns_esc_32_bit )
& nest EndEscape
-- 6.1 Indentation Spaces
s_indent n {- 66 -} = token Indent ( s_space % n )
s_indent_lt n {- 67 -} = token Indent ( s_space <% n )
s_indent_le n {- 68 -} = token Indent ( s_space <% (n .+ 1) )
-- 6.2 Separation Spaces
s_separate_in_line {- 69 -} = token White ( s_white +) / sol
-- 6.3 Line Prefixes
s_line_prefix n c {- 70 -} = case c of
BlockOut -> s_block_line_prefix n
BlockIn -> s_block_line_prefix n
FlowOut -> s_flow_line_prefix n
FlowIn -> s_flow_line_prefix n
s_block_line_prefix n {- 71 -} = s_indent n
s_flow_line_prefix n {- 72 -} = s_indent n & ( s_separate_in_line ?)
-- 6.4 Empty Lines
l_empty n c {- 73 -} = ( s_line_prefix n c / s_indent_lt n )
& b_normalized
-- 6.5 Comments
c_nb_comment_text {- 74 -} = nest BeginComment
& c_comment & meta ( nb_char *)
& nest EndComment
s_b_comment {- 75 -} = ( s_separate_in_line & ( c_nb_comment_text ?) ?)
& b_non_content_any
l_comment {- 76 -} = s_separate_in_line & ( c_nb_comment_text ?) & b_non_content_any
s_l_comments {- 77 -} = ( s_b_comment / sol )
& ( l_comment *)
-- 6.6 Separation Lines
s_separate n c {- 78 -} = case c of
BlockOut -> s_separate_lines n
BlockIn -> s_separate_lines n
FlowOut -> s_separate_lines n
FlowIn -> s_separate_lines n
FlowKey -> s_separate_in_line
s_separate_lines n {- 79 -} = s_l_comments & s_flow_line_prefix n
/ s_separate_in_line
-- 6.7 Line Folding
b_l_folded_specific n c {- 80 -} = token Break b_specific & ( l_empty n c *)
b_l_folded_trimmed n c {- 81 -} = b_non_content_generic & ( l_empty n c +)
b_l_folded_as_space {- 82 -} = token LineFold b_generic
b_l_folded_any n c {- 83 -} = b_l_folded_specific n c
/ b_l_folded_trimmed n c
/ b_l_folded_as_space
s_l_flow_folded n {- 84 -} = ( s_separate_in_line ?) & b_l_folded_any n FlowIn
-- 6.8 Directives
l_directive {- 85 -} = nest BeginDirective
& c_directive
& "directive"
^ ( ns_yaml_directive
/ ns_tag_directive
/ ns_reserved_directive )
& nest EndDirective
& s_l_comments
ns_reserved_directive {- 86 -} = ns_directive_name
& ( s_separate_in_line & ns_directive_parameter *)
ns_directive_name {- 87 -} = meta ( ns_char +)
ns_directive_parameter {- 88 -} = meta ( ns_char +)
-- 6.8.1 Yaml Directives
ns_yaml_directive {- 89 -} = meta [ 'Y', 'A', 'M', 'L' ] ! "directive"
& s_separate_in_line & ns_yaml_version
ns_yaml_version {- 90 -} = meta ( ( ns_dec_digit +) & '.' & ( ns_dec_digit +) )
-- 6.8.2 Tag Directives
ns_tag_directive {- 91 -} = meta [ 'T', 'A', 'G' ] ! "directive"
& s_separate_in_line & c_tag_handle
& s_separate_in_line & ns_tag_prefix
-- 6.8.2.1 Tag Handles
c_tag_handle {- 92 -} = c_named_tag_handle
/ c_secondary_tag_handle
/ c_primary_tag_handle
c_primary_tag_handle {- 93 -} = nest BeginHandle
& c_tag
& nest EndHandle
c_secondary_tag_handle {- 94 -} = nest BeginHandle
& c_tag & c_tag
& nest EndHandle
c_named_tag_handle {- 95 -} = nest BeginHandle
& c_tag & meta ( ns_word_char +) & c_tag
& nest EndHandle
-- 6.8.2.2 Tag Prefixes
ns_tag_prefix {- 96 -} = nest BeginTag
& ( c_ns_local_tag_prefix / ns_global_tag_prefix )
& nest EndTag
c_ns_local_tag_prefix {- 97 -} = c_tag & meta ( ns_uri_char *)
ns_global_tag_prefix {- 98 -} = meta ( ns_tag_char & ( ns_uri_char *) )
-- 6.9 Node Properties
c_ns_properties n c {- 99 -} = nest BeginProperties
& ( ( c_ns_tag_property
& ( s_separate n c & c_ns_anchor_property ?) )
/ ( c_ns_anchor_property
& ( s_separate n c & c_ns_tag_property ?) ) )
& nest EndProperties
-- 6.9.1 Node Tags
c_ns_tag_property {- 100 -} = nest BeginTag
& ( c_verbatim_tag
/ c_ns_shorthand_tag
/ c_non_specific_tag )
& nest EndTag
c_verbatim_tag {- 101 -} = c_tag & indicator '<' & meta ( ns_uri_char +) & indicator '>'
c_ns_shorthand_tag {- 102 -} = c_named_tag_handle & meta ( ns_uri_char +)
/ c_secondary_tag_handle & meta ( ns_uri_char +)
/ c_primary_tag_handle & meta ( ns_tag_char +)
c_non_specific_tag {- 103 -} = c_tag
-- 6.9.2 Node Anchors
c_ns_anchor_property {- 104 -} = nest BeginAnchor
& c_anchor & ns_anchor_name
& nest EndAnchor
ns_anchor_char {- 105 -} = ns_char - ( c_collect_entry / c_sequence_start / c_sequence_end / c_mapping_start / c_mapping_end )
ns_anchor_name {- 106 -} = meta ( ns_anchor_char +)
-- 7.1 Alias Nodes
c_ns_alias_node {- 107 -} = nest BeginAlias
& c_alias ! "node" & ns_anchor_name
& nest EndAlias
-- 7.2 Empty Nodes
e_scalar {- 108 -} = nest BeginScalar & nest EndScalar
e_node {- 109 -} = nest BeginNode & e_scalar & nest EndNode
-- 7.3.1 Double Quoted Style
nb_double_char {- 110 -} = "escape" ^ ( nb_char - c_escape - c_double_quote / c_ns_esc_char )
ns_double_char {- 111 -} = nb_double_char - s_white
c_double_quoted n c {- 112 -} = nest BeginScalar
& c_double_quote ! "node" & text ( nb_double_text n c ) & c_double_quote
& nest EndScalar
nb_double_text n c {- 113 -} = case c of
FlowOut -> nb_double_multi_line n
FlowIn -> nb_double_multi_line n
FlowKey -> nb_double_one_line
nb_double_one_line {- 114 -} = ( nb_double_char *)
s_l_double_escaped n {- 115 -} = ( s_white *)
& nest BeginEscape
& c_escape ! "escape" & b_non_content_any
& nest EndEscape
& ( l_empty n FlowIn *)
s_l_double_any n {- 116 -} = "escape" ^ ( s_l_double_escaped n / s_l_flow_folded n )
nb_ns_double_in_line {- 117 -} = ( ( s_white *) & ns_double_char *)
s_ns_double_next_line n {- 118 -} = s_l_double_any n
& s_flow_line_prefix n
& ns_double_char & nb_ns_double_in_line
nb_double_multi_line n {- 119 -} = nb_ns_double_in_line
& ( s_ns_double_next_line n *)
& ( s_white *)
-- 7.3.2 Single Quoted Style
c_quoted_quote {- 120 -} = nest BeginEscape
& c_single_quote ! "escape" & meta '\''
& nest EndEscape
nb_single_char {- 121 -} = "escape" ^ ( nb_char - c_single_quote / c_quoted_quote )
ns_single_char {- 122 -} = nb_single_char - s_white
c_single_quoted n c {- 123 -}= nest BeginScalar
& c_single_quote & text ( nb_single_text n c ) & c_single_quote
& nest EndScalar
nb_single_text n c {- 124 -} = case c of
FlowOut -> nb_single_multi_line n
FlowIn -> nb_single_multi_line n
FlowKey -> nb_single_one_line
nb_single_one_line {- 125 -} = ( nb_single_char *)
nb_ns_single_in_line {- 126 -} = ( ( s_white *) & ns_single_char *)
s_ns_single_next_line n {- 127 -} = s_l_flow_folded n
& s_flow_line_prefix n
& ns_single_char & nb_ns_single_in_line
nb_single_multi_line n {- 128 -} = ( nb_ns_single_in_line *)
& ( s_ns_single_next_line n *)
& ( s_white *)
-- 7.3.3 Plain Style
ns_plain_first c {- 129 -} = ns_char - c_indicator
/ ( ':' / '?' / '-' ) & ( ns_char >?)
ns_plain_safe c {- 130 -} = case c of
FlowOut -> ns_plain_safe_out
FlowIn -> ns_plain_safe_in
FlowKey -> ns_plain_safe_in
ns_plain_safe_out {- 131 -} = ns_char - c_mapping_value - c_comment
ns_plain_safe_in {- 132 -}= ns_plain_safe_out - ( c_collect_entry / c_sequence_start / c_sequence_end / c_mapping_start / c_mapping_end )
ns_plain_char c {- 133 -} = ns_plain_safe c
/ ( ns_char <?) & '#'
/ ':' & ( ns_char >?)
nb_plain_char c {- 134 -} = s_white / ns_plain_char c
ns_plain n c {- 135 -} = nest BeginScalar
& text (case c of
FlowOut -> ns_plain_multi_line n c
FlowIn -> ns_plain_multi_line n c
FlowKey -> ns_plain_one_line c)
& nest EndScalar
nb_ns_plain_in_line c {- 136 -} = ( ( s_white *) & ns_plain_char c *)
ns_plain_one_line c {- 137 -} = ns_plain_first c ! "node" & nb_ns_plain_in_line c
s_ns_plain_next_line n c {- 138 -} = s_l_flow_folded n
& s_flow_line_prefix n
& ns_plain_char c & nb_ns_plain_in_line c
ns_plain_multi_line n c {- 139 -} = ns_plain_one_line c & ( s_ns_plain_next_line n c *)
-- 7.4 Flow Collection Styles
in_flow c {- 140 -} = case c of
FlowOut -> FlowIn
FlowIn -> FlowIn
FlowKey -> FlowKey
-- 7.4.1 Flow Sequences
c_flow_sequence n c {- 141 -} = nest BeginSequence
& c_sequence_start ! "node" & ( s_separate n c ?)
& ( ns_s_flow_seq_entries n (in_flow c) ?) & c_sequence_end
& nest EndSequence
ns_s_flow_seq_entries n c {- 142 -} = ns_flow_seq_entry n c & ( s_separate n c ?)
& ( c_collect_entry & ( s_separate n c ?)
& ( ns_s_flow_seq_entries n c ?) ?)
ns_flow_seq_entry n c {- 143 -} = "pair" ^ ( ns_flow_pair n c / "node" ^ ns_flow_node n c )
-- 7.4.2 Flow Mappings
c_flow_mapping n c {- 144 -} = nest BeginMapping
& c_mapping_start ! "node" & ( s_separate n c ?)
& ( ns_s_flow_map_entries n (in_flow c) ?) & c_mapping_end
& nest EndMapping
ns_s_flow_map_entries n c {- 145 -} = ns_flow_map_entry n c & ( s_separate n c ?)
& ( c_collect_entry & ( s_separate n c ?)
& ( ns_s_flow_map_entries n c ?) ?)
ns_flow_map_entry n c {- 146 -} = nest BeginPair
& "key" ^ ( c_mapping_key ! "key" & s_separate n c
& ns_flow_map_explicit_entry n c
/ ns_flow_map_implicit_entry n c )
& nest EndPair
ns_flow_map_explicit_entry n c {- 147 -} = ns_flow_map_implicit_entry n c
/ e_node
& e_node
ns_flow_map_implicit_entry n c {- 148 -} = "pair"
^ ( ns_flow_map_yaml_key_entry n c
/ c_ns_flow_map_empty_key_entry n c
/ c_ns_flow_map_json_key_entry n c )
ns_flow_map_yaml_key_entry n c {- 149 -} = ( "node" ^ ns_flow_yaml_node n c ) ! "pair"
& ( ( s_separate n c ?)
& c_ns_flow_map_separate_value n c
/ e_node )
c_ns_flow_map_empty_key_entry n c {- 150 -} = e_node
& c_ns_flow_map_separate_value n c
c_ns_flow_map_separate_value n c {- 151 -} = c_mapping_value ! "pair"
& ( s_separate n c & ns_flow_node n c
/ e_node )
c_ns_flow_map_json_key_entry n c {- 152 -} = ( "node" ^ c_flow_json_node n c ) ! "pair"
& ( ( s_separate n c ?)
& c_ns_flow_map_adjacent_value n c
/ e_node )
c_ns_flow_map_adjacent_value n c {- 153 -} = c_mapping_value ! "pair" & ( ( s_separate n c ?)
& ns_flow_node n c
/ e_node )
ns_flow_pair n c {- 154 -} = nest BeginMapping
& nest BeginPair
& ( c_mapping_key ! "pair" & s_separate n c
& ns_flow_map_explicit_entry n c
/ ns_flow_pair_entry n c )
& nest EndPair
& nest EndMapping
ns_flow_pair_entry n c {- 155 -} = "entry"
^ ( ns_flow_pair_yaml_key_entry n c
/ c_ns_flow_map_empty_key_entry n c
/ c_ns_flow_pair_json_key_entry n c )
ns_flow_pair_yaml_key_entry n c {- 156 -} = ns_s_implicit_yaml_key
& c_ns_flow_map_separate_value n c
c_ns_flow_pair_json_key_entry n c {- 157 -} = c_s_implicit_json_key
& c_ns_flow_map_adjacent_value n c
ns_s_implicit_yaml_key {- 158 -} = ( "node" ^ ( ns_flow_yaml_node na FlowKey )
& ( s_separate_in_line ?) )
`limitedTo` 1024
c_s_implicit_json_key {- 159 -} = ( "node" ^ ( c_flow_json_node na FlowKey )
& ( s_separate_in_line ?) )
`limitedTo` 1024
-- 7.5 Flow Nodes
ns_flow_yaml_content n c {- 160 -} = ns_plain n c
c_flow_json_content n c {- 161 -} = c_flow_sequence n c / c_flow_mapping n c
/ c_single_quoted n c / c_double_quoted n c
ns_flow_content n c {- 162 -} = ns_flow_yaml_content n c / c_flow_json_content n c
ns_flow_yaml_node n c {- 163 -} = nest BeginNode
& ( c_ns_alias_node
/ ns_flow_yaml_content n c
/ ( c_ns_properties n c
& ( s_separate n c & ns_flow_yaml_content n c
/ e_scalar ) ) )
& nest EndNode
c_flow_json_node n c {- 164 -} = nest BeginNode
& ( c_ns_properties n c & s_separate n c ?)
& c_flow_json_content n c
& nest EndNode
ns_flow_node n c {- 165 -} = nest BeginNode
& ( c_ns_alias_node
/ ns_flow_content n c
/ ( c_ns_properties n c
& ( s_separate n c & ns_flow_content n c
/ e_scalar ) ) )
& nest EndNode
-- 8.1.1 Block Scalar Headers
c_b_block_header n {- 166 -} = "header"
^ ( do m <- c_indentation_indicator n
t <- c_chomping_indicator
( s_white / b_char ) ?! "header"
s_b_comment
result (m, t)
/ do t <- c_chomping_indicator
m <- c_indentation_indicator n
s_b_comment
result (m, t) )
-- 8.1.1.1 Block Indentation Indicator
c_indentation_indicator n {- 167 -} = indicator ( ns_dec_digit - '0' ) & asInteger
/ detect_scalar_indentation n
detect_scalar_indentation n = peek $ ( nb_char *)
& ( b_non_content_any & ( l_empty n BlockIn *) ?)
& count_spaces (-n)
count_spaces n = (s_space & count_spaces (n .+ 1))
/ result (max 1 n)
-- 8.1.1.2 Chomping Indicator
c_chomping_indicator {- 168 -} = indicator '-' & result Strip
/ indicator '+' ! "header" & result Keep
/ result Clip
b_chomped_last t {- 169 -} = case t of
Strip -> nest EndScalar & b_non_content_any
Clip -> b_normalized & nest EndScalar
Keep -> b_normalized
l_chomped_empty n t {- 170 -} = case t of
Strip -> l_strip_empty n
Clip -> l_strip_empty n
Keep -> l_keep_empty n
l_strip_empty n {- 171 -} = ( s_indent_le n & b_non_content_any *)
& ( l_trail_comments n ?)
l_keep_empty n {- 172 -} = ( l_empty n BlockIn *)
& nest EndScalar
& ( l_trail_comments n ?)
l_trail_comments n {- 173 -} = s_indent_lt n & c_nb_comment_text & b_non_content_any
& ( l_comment *)
-- 8.1.2 Literal Style
c_l__literal n {- 174 -} = do nest BeginScalar
indicator '|'
(m, t) <- c_b_block_header n
text ( l_literal_content (n .+ m) t )
l_nb_literal_text n {- 175 -} = ( l_empty n BlockIn *)
& s_indent n & ( nb_char +)
b_nb_literal_next n {- 176 -} = b_normalized
& l_nb_literal_text n
l_literal_content n t {- 177 -} = ( l_nb_literal_text n & ( b_nb_literal_next n *)
& b_chomped_last t ?)
& l_chomped_empty n t
-- 8.1.3 Folded Style
c_l__folded n {- 178 -} = do nest BeginScalar
indicator '>'
(m, t) <- c_b_block_header n
text ( l_folded_content (n .+ m) t )
s_nb_folded_text n {- 179 -} = s_indent n & ns_char ! "fold" & ( nb_char *)
l_nb_folded_lines n {- 180 -} = s_nb_folded_text n
& ( b_l_folded_any n BlockIn & s_nb_folded_text n *)
s_nb_spaced_text n {- 181 -} = s_indent n & s_white ! "fold" & ( nb_char *)
b_l_spaced n {- 182 -} = b_normalized
& ( l_empty n BlockIn *)
l_nb_spaced_lines n {- 183 -} = s_nb_spaced_text n
& ( b_l_spaced n & s_nb_spaced_text n *)
l_nb_same_lines n {- 184 -} = ( l_empty n BlockIn *)
& "fold" ^ ( l_nb_folded_lines n / l_nb_spaced_lines n )
l_nb_diff_lines n {- 185 -} = l_nb_same_lines n
& ( b_normalized & l_nb_same_lines n *)
l_folded_content n t {- 186 -} = ( l_nb_diff_lines n & b_chomped_last t ?)
& l_chomped_empty n t
-- 8.2.1 Block Sequences
detect_collection_indentation n = peek $ ( l_comment* ) & count_spaces (-n)
detect_inline_indentation = peek $ count_spaces 0
l__block_sequence n {- 187 -} = do m <- detect_collection_indentation n
( nest BeginSequence
& ( s_indent (n .+ m) & c_l_block_seq_entry (n .+ m) +)
& nest EndSequence )
c_l_block_seq_entry n {- 188 -} = c_sequence_entry ! "node" & s_l__block_indented n BlockIn
s_l__block_indented n c {- 189 -} = do m <- detect_inline_indentation
( s_indent m
& "node"
^ ( ns_l_in_line_sequence (n .+ 1 .+ m)
/ ns_l_in_line_mapping (n .+ 1 .+ m) ) )
/ s_l__block_node n c
/ e_node & s_l_comments
ns_l_in_line_sequence n {- 190 -} = nest BeginNode
& nest BeginSequence
& c_l_block_seq_entry n
& ( s_indent n & c_l_block_seq_entry n *)
& nest EndSequence
& nest EndNode
-- 8.2.2 Block Mappings
l__block_mapping n = {- 191 -} do m <- detect_collection_indentation n
( nest BeginMapping
& ( s_indent (n .+ m) & ns_l_block_map_entry (n .+ m) +)
& nest EndMapping )
ns_l_block_map_entry n {- 192 -} = nest BeginPair
& ( c_l_block_map_explicit_entry n
/ ns_l_block_map_implicit_entry n )
& nest EndPair
c_l_block_map_explicit_entry n {- 193 -} = c_l_block_map_explicit_key n
& ( l_block_map_explicit_value n
/ e_node )
c_l_block_map_explicit_key n {- 194 -} = c_mapping_key ! "node" & s_l__block_indented n BlockOut
l_block_map_explicit_value n {- 195 -} = s_indent n & c_mapping_value & s_l__block_indented n BlockOut
ns_l_block_map_implicit_entry n {- 196 -} = ( ns_s_block_map_implicit_key
/ e_node )
& c_l_block_map_implicit_value n
ns_s_block_map_implicit_key {- 197 -} = c_s_implicit_json_key / ns_s_implicit_yaml_key
c_l_block_map_implicit_value n {- 198 -} = c_mapping_value ! "node" & ( s_l__block_node n BlockOut
/ e_node & s_l_comments )
ns_l_in_line_mapping n {-199 -} = nest BeginNode
& nest BeginMapping
& ns_l_block_map_entry n
& ( s_indent n & ns_l_block_map_entry n *)
& nest EndMapping
& nest EndNode
-- 8.2.3 Block Nodes
s_l__block_node n c {- 200 -} = s_l__block_in_block n c / s_l__flow_in_block n
s_l__flow_in_block n {- 201 -} = s_separate (n .+ 1) FlowOut
& ns_flow_node (n .+ 1) FlowOut & s_l_comments
s_l__block_in_block n c {- 202 -} = nest BeginNode
& ( s_l__block_scalar n c / s_l__block_collection n c )
& nest EndNode
s_l__block_scalar n c {- 203 -} = s_separate (n .+ 1) c
& ( c_ns_properties (n .+ 1) c & s_separate (n .+ 1) c ?)
& ( c_l__literal n / c_l__folded n )
s_l__block_collection n c {- 204 -} = ( s_separate (n .+ 1) c & c_ns_properties (n .+ 1) c & ( s_l_comments >? ) ?)
& s_l_comments
& ( l__block_sequence (seq_spaces n c)
/ l__block_mapping n )
seq_spaces n c {- 205 -} = case c of
BlockOut -> n .- 1
BlockIn -> n
-- Document:
c_document_start {- 206 -} = token DocumentStart [ '-', '-', '-' ]
c_document_end {- 207 -} = token DocumentEnd [ '.', '.', '.' ]
l_forbidden {- 208 -} = sol
& ( c_document_start / c_document_end )
& ( b_char / s_white / eof )
l_document_prefix {- 209 -} = ( c_byte_order_mark ?) & ( l_comment *)
l_document_suffix {- 210 -} = c_document_end & s_l_comments
l_implicit_document {- 211 -} = nest BeginDocument
& s_l__block_node (-1) BlockIn
`forbidding` l_forbidden
& nest EndDocument
l_explicit_document {- 212 -} = nest BeginDocument
& ( l_directive ! "doc" *)
& c_document_start ! "doc"
& "node" ^ ( l_implicit_document
/ e_node & s_l_comments )
& nest EndDocument
l_leading_document {- 213 -} = l_document_prefix
& "doc" ^ ( l_explicit_document
/ "node" ^ ( l_implicit_document
/ empty ) )
l_following_document {- 214 -} = l_document_prefix
& "doc" ^ ( l_explicit_document
/ empty )
-- Stream:
l_documents {- 215 -} = l_leading_document
& ( l_following_document *)
l_yaml_stream {- 216 -} = nest BeginStream
& l_documents
& ( l_document_suffix & l_documents *)
& nest EndStream