Set To Do branch

1 files changed, 0 insertions, 1258 deletions

diff --git a/vendor/gopkg.in/yaml.v3/parserc.go b/vendor/gopkg.in/yaml.v3/parserc.go
deleted file mode 100644
index 268558a..0000000
--- a/vendor/gopkg.in/yaml.v3/parserc.go
+++ /dev/null
@@ -1,1258 +0,0 @@
-//
-// Copyright (c) 2011-2019 Canonical Ltd
-// Copyright (c) 2006-2010 Kirill Simonov
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy of
-// this software and associated documentation files (the "Software"), to deal in
-// the Software without restriction, including without limitation the rights to
-// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-// of the Software, and to permit persons to whom the Software is furnished to do
-// so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-package yaml
-
-import (
-	"bytes"
-)
-
-// The parser implements the following grammar:
-//
-// stream               ::= STREAM-START implicit_document? explicit_document* STREAM-END
-// implicit_document    ::= block_node DOCUMENT-END*
-// explicit_document    ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-// block_node_or_indentless_sequence    ::=
-//                          ALIAS
-//                          | properties (block_content | indentless_block_sequence)?
-//                          | block_content
-//                          | indentless_block_sequence
-// block_node           ::= ALIAS
-//                          | properties block_content?
-//                          | block_content
-// flow_node            ::= ALIAS
-//                          | properties flow_content?
-//                          | flow_content
-// properties           ::= TAG ANCHOR? | ANCHOR TAG?
-// block_content        ::= block_collection | flow_collection | SCALAR
-// flow_content         ::= flow_collection | SCALAR
-// block_collection     ::= block_sequence | block_mapping
-// flow_collection      ::= flow_sequence | flow_mapping
-// block_sequence       ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-// indentless_sequence  ::= (BLOCK-ENTRY block_node?)+
-// block_mapping        ::= BLOCK-MAPPING_START
-//                          ((KEY block_node_or_indentless_sequence?)?
-//                          (VALUE block_node_or_indentless_sequence?)?)*
-//                          BLOCK-END
-// flow_sequence        ::= FLOW-SEQUENCE-START
-//                          (flow_sequence_entry FLOW-ENTRY)*
-//                          flow_sequence_entry?
-//                          FLOW-SEQUENCE-END
-// flow_sequence_entry  ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-// flow_mapping         ::= FLOW-MAPPING-START
-//                          (flow_mapping_entry FLOW-ENTRY)*
-//                          flow_mapping_entry?
-//                          FLOW-MAPPING-END
-// flow_mapping_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-
-// Peek the next token in the token queue.
-func peek_token(parser *yaml_parser_t) *yaml_token_t {
-	if parser.token_available || yaml_parser_fetch_more_tokens(parser) {
-		token := &parser.tokens[parser.tokens_head]
-		yaml_parser_unfold_comments(parser, token)
-		return token
-	}
-	return nil
-}
-
-// yaml_parser_unfold_comments walks through the comments queue and joins all
-// comments behind the position of the provided token into the respective
-// top-level comment slices in the parser.
-func yaml_parser_unfold_comments(parser *yaml_parser_t, token *yaml_token_t) {
-	for parser.comments_head < len(parser.comments) && token.start_mark.index >= parser.comments[parser.comments_head].token_mark.index {
-		comment := &parser.comments[parser.comments_head]
-		if len(comment.head) > 0 {
-			if token.typ == yaml_BLOCK_END_TOKEN {
-				// No heads on ends, so keep comment.head for a follow up token.
-				break
-			}
-			if len(parser.head_comment) > 0 {
-				parser.head_comment = append(parser.head_comment, '\n')
-			}
-			parser.head_comment = append(parser.head_comment, comment.head...)
-		}
-		if len(comment.foot) > 0 {
-			if len(parser.foot_comment) > 0 {
-				parser.foot_comment = append(parser.foot_comment, '\n')
-			}
-			parser.foot_comment = append(parser.foot_comment, comment.foot...)
-		}
-		if len(comment.line) > 0 {
-			if len(parser.line_comment) > 0 {
-				parser.line_comment = append(parser.line_comment, '\n')
-			}
-			parser.line_comment = append(parser.line_comment, comment.line...)
-		}
-		*comment = yaml_comment_t{}
-		parser.comments_head++
-	}
-}
-
-// Remove the next token from the queue (must be called after peek_token).
-func skip_token(parser *yaml_parser_t) {
-	parser.token_available = false
-	parser.tokens_parsed++
-	parser.stream_end_produced = parser.tokens[parser.tokens_head].typ == yaml_STREAM_END_TOKEN
-	parser.tokens_head++
-}
-
-// Get the next event.
-func yaml_parser_parse(parser *yaml_parser_t, event *yaml_event_t) bool {
-	// Erase the event object.
-	*event = yaml_event_t{}
-
-	// No events after the end of the stream or error.
-	if parser.stream_end_produced || parser.error != yaml_NO_ERROR || parser.state == yaml_PARSE_END_STATE {
-		return true
-	}
-
-	// Generate the next event.
-	return yaml_parser_state_machine(parser, event)
-}
-
-// Set parser error.
-func yaml_parser_set_parser_error(parser *yaml_parser_t, problem string, problem_mark yaml_mark_t) bool {
-	parser.error = yaml_PARSER_ERROR
-	parser.problem = problem
-	parser.problem_mark = problem_mark
-	return false
-}
-
-func yaml_parser_set_parser_error_context(parser *yaml_parser_t, context string, context_mark yaml_mark_t, problem string, problem_mark yaml_mark_t) bool {
-	parser.error = yaml_PARSER_ERROR
-	parser.context = context
-	parser.context_mark = context_mark
-	parser.problem = problem
-	parser.problem_mark = problem_mark
-	return false
-}
-
-// State dispatcher.
-func yaml_parser_state_machine(parser *yaml_parser_t, event *yaml_event_t) bool {
-	//trace("yaml_parser_state_machine", "state:", parser.state.String())
-
-	switch parser.state {
-	case yaml_PARSE_STREAM_START_STATE:
-		return yaml_parser_parse_stream_start(parser, event)
-
-	case yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE:
-		return yaml_parser_parse_document_start(parser, event, true)
-
-	case yaml_PARSE_DOCUMENT_START_STATE:
-		return yaml_parser_parse_document_start(parser, event, false)
-
-	case yaml_PARSE_DOCUMENT_CONTENT_STATE:
-		return yaml_parser_parse_document_content(parser, event)
-
-	case yaml_PARSE_DOCUMENT_END_STATE:
-		return yaml_parser_parse_document_end(parser, event)
-
-	case yaml_PARSE_BLOCK_NODE_STATE:
-		return yaml_parser_parse_node(parser, event, true, false)
-
-	case yaml_PARSE_BLOCK_NODE_OR_INDENTLESS_SEQUENCE_STATE:
-		return yaml_parser_parse_node(parser, event, true, true)
-
-	case yaml_PARSE_FLOW_NODE_STATE:
-		return yaml_parser_parse_node(parser, event, false, false)
-
-	case yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE:
-		return yaml_parser_parse_block_sequence_entry(parser, event, true)
-
-	case yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE:
-		return yaml_parser_parse_block_sequence_entry(parser, event, false)
-
-	case yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE:
-		return yaml_parser_parse_indentless_sequence_entry(parser, event)
-
-	case yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE:
-		return yaml_parser_parse_block_mapping_key(parser, event, true)
-
-	case yaml_PARSE_BLOCK_MAPPING_KEY_STATE:
-		return yaml_parser_parse_block_mapping_key(parser, event, false)
-
-	case yaml_PARSE_BLOCK_MAPPING_VALUE_STATE:
-		return yaml_parser_parse_block_mapping_value(parser, event)
-
-	case yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE:
-		return yaml_parser_parse_flow_sequence_entry(parser, event, true)
-
-	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE:
-		return yaml_parser_parse_flow_sequence_entry(parser, event, false)
-
-	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE:
-		return yaml_parser_parse_flow_sequence_entry_mapping_key(parser, event)
-
-	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE:
-		return yaml_parser_parse_flow_sequence_entry_mapping_value(parser, event)
-
-	case yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE:
-		return yaml_parser_parse_flow_sequence_entry_mapping_end(parser, event)
-
-	case yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE:
-		return yaml_parser_parse_flow_mapping_key(parser, event, true)
-
-	case yaml_PARSE_FLOW_MAPPING_KEY_STATE:
-		return yaml_parser_parse_flow_mapping_key(parser, event, false)
-
-	case yaml_PARSE_FLOW_MAPPING_VALUE_STATE:
-		return yaml_parser_parse_flow_mapping_value(parser, event, false)
-
-	case yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE:
-		return yaml_parser_parse_flow_mapping_value(parser, event, true)
-
-	default:
-		panic("invalid parser state")
-	}
-}
-
-// Parse the production:
-// stream   ::= STREAM-START implicit_document? explicit_document* STREAM-END
-//              ************
-func yaml_parser_parse_stream_start(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if token.typ != yaml_STREAM_START_TOKEN {
-		return yaml_parser_set_parser_error(parser, "did not find expected <stream-start>", token.start_mark)
-	}
-	parser.state = yaml_PARSE_IMPLICIT_DOCUMENT_START_STATE
-	*event = yaml_event_t{
-		typ:        yaml_STREAM_START_EVENT,
-		start_mark: token.start_mark,
-		end_mark:   token.end_mark,
-		encoding:   token.encoding,
-	}
-	skip_token(parser)
-	return true
-}
-
-// Parse the productions:
-// implicit_document    ::= block_node DOCUMENT-END*
-//                          *
-// explicit_document    ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-//                          *************************
-func yaml_parser_parse_document_start(parser *yaml_parser_t, event *yaml_event_t, implicit bool) bool {
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	// Parse extra document end indicators.
-	if !implicit {
-		for token.typ == yaml_DOCUMENT_END_TOKEN {
-			skip_token(parser)
-			token = peek_token(parser)
-			if token == nil {
-				return false
-			}
-		}
-	}
-
-	if implicit && token.typ != yaml_VERSION_DIRECTIVE_TOKEN &&
-		token.typ != yaml_TAG_DIRECTIVE_TOKEN &&
-		token.typ != yaml_DOCUMENT_START_TOKEN &&
-		token.typ != yaml_STREAM_END_TOKEN {
-		// Parse an implicit document.
-		if !yaml_parser_process_directives(parser, nil, nil) {
-			return false
-		}
-		parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE)
-		parser.state = yaml_PARSE_BLOCK_NODE_STATE
-
-		var head_comment []byte
-		if len(parser.head_comment) > 0 {
-			// [Go] Scan the header comment backwards, and if an empty line is found, break
-			//      the header so the part before the last empty line goes into the
-			//      document header, while the bottom of it goes into a follow up event.
-			for i := len(parser.head_comment) - 1; i > 0; i-- {
-				if parser.head_comment[i] == '\n' {
-					if i == len(parser.head_comment)-1 {
-						head_comment = parser.head_comment[:i]
-						parser.head_comment = parser.head_comment[i+1:]
-						break
-					} else if parser.head_comment[i-1] == '\n' {
-						head_comment = parser.head_comment[:i-1]
-						parser.head_comment = parser.head_comment[i+1:]
-						break
-					}
-				}
-			}
-		}
-
-		*event = yaml_event_t{
-			typ:        yaml_DOCUMENT_START_EVENT,
-			start_mark: token.start_mark,
-			end_mark:   token.end_mark,
-
-			head_comment: head_comment,
-		}
-
-	} else if token.typ != yaml_STREAM_END_TOKEN {
-		// Parse an explicit document.
-		var version_directive *yaml_version_directive_t
-		var tag_directives []yaml_tag_directive_t
-		start_mark := token.start_mark
-		if !yaml_parser_process_directives(parser, &version_directive, &tag_directives) {
-			return false
-		}
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_DOCUMENT_START_TOKEN {
-			yaml_parser_set_parser_error(parser,
-				"did not find expected <document start>", token.start_mark)
-			return false
-		}
-		parser.states = append(parser.states, yaml_PARSE_DOCUMENT_END_STATE)
-		parser.state = yaml_PARSE_DOCUMENT_CONTENT_STATE
-		end_mark := token.end_mark
-
-		*event = yaml_event_t{
-			typ:               yaml_DOCUMENT_START_EVENT,
-			start_mark:        start_mark,
-			end_mark:          end_mark,
-			version_directive: version_directive,
-			tag_directives:    tag_directives,
-			implicit:          false,
-		}
-		skip_token(parser)
-
-	} else {
-		// Parse the stream end.
-		parser.state = yaml_PARSE_END_STATE
-		*event = yaml_event_t{
-			typ:        yaml_STREAM_END_EVENT,
-			start_mark: token.start_mark,
-			end_mark:   token.end_mark,
-		}
-		skip_token(parser)
-	}
-
-	return true
-}
-
-// Parse the productions:
-// explicit_document    ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-//                                                    ***********
-//
-func yaml_parser_parse_document_content(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	if token.typ == yaml_VERSION_DIRECTIVE_TOKEN ||
-		token.typ == yaml_TAG_DIRECTIVE_TOKEN ||
-		token.typ == yaml_DOCUMENT_START_TOKEN ||
-		token.typ == yaml_DOCUMENT_END_TOKEN ||
-		token.typ == yaml_STREAM_END_TOKEN {
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-		return yaml_parser_process_empty_scalar(parser, event,
-			token.start_mark)
-	}
-	return yaml_parser_parse_node(parser, event, true, false)
-}
-
-// Parse the productions:
-// implicit_document    ::= block_node DOCUMENT-END*
-//                                     *************
-// explicit_document    ::= DIRECTIVE* DOCUMENT-START block_node? DOCUMENT-END*
-//
-func yaml_parser_parse_document_end(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	start_mark := token.start_mark
-	end_mark := token.start_mark
-
-	implicit := true
-	if token.typ == yaml_DOCUMENT_END_TOKEN {
-		end_mark = token.end_mark
-		skip_token(parser)
-		implicit = false
-	}
-
-	parser.tag_directives = parser.tag_directives[:0]
-
-	parser.state = yaml_PARSE_DOCUMENT_START_STATE
-	*event = yaml_event_t{
-		typ:        yaml_DOCUMENT_END_EVENT,
-		start_mark: start_mark,
-		end_mark:   end_mark,
-		implicit:   implicit,
-	}
-	yaml_parser_set_event_comments(parser, event)
-	if len(event.head_comment) > 0 && len(event.foot_comment) == 0 {
-		event.foot_comment = event.head_comment
-		event.head_comment = nil
-	}
-	return true
-}
-
-func yaml_parser_set_event_comments(parser *yaml_parser_t, event *yaml_event_t) {
-	event.head_comment = parser.head_comment
-	event.line_comment = parser.line_comment
-	event.foot_comment = parser.foot_comment
-	parser.head_comment = nil
-	parser.line_comment = nil
-	parser.foot_comment = nil
-	parser.tail_comment = nil
-	parser.stem_comment = nil
-}
-
-// Parse the productions:
-// block_node_or_indentless_sequence    ::=
-//                          ALIAS
-//                          *****
-//                          | properties (block_content | indentless_block_sequence)?
-//                            **********  *
-//                          | block_content | indentless_block_sequence
-//                            *
-// block_node           ::= ALIAS
-//                          *****
-//                          | properties block_content?
-//                            ********** *
-//                          | block_content
-//                            *
-// flow_node            ::= ALIAS
-//                          *****
-//                          | properties flow_content?
-//                            ********** *
-//                          | flow_content
-//                            *
-// properties           ::= TAG ANCHOR? | ANCHOR TAG?
-//                          *************************
-// block_content        ::= block_collection | flow_collection | SCALAR
-//                                                               ******
-// flow_content         ::= flow_collection | SCALAR
-//                                            ******
-func yaml_parser_parse_node(parser *yaml_parser_t, event *yaml_event_t, block, indentless_sequence bool) bool {
-	//defer trace("yaml_parser_parse_node", "block:", block, "indentless_sequence:", indentless_sequence)()
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	if token.typ == yaml_ALIAS_TOKEN {
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-		*event = yaml_event_t{
-			typ:        yaml_ALIAS_EVENT,
-			start_mark: token.start_mark,
-			end_mark:   token.end_mark,
-			anchor:     token.value,
-		}
-		yaml_parser_set_event_comments(parser, event)
-		skip_token(parser)
-		return true
-	}
-
-	start_mark := token.start_mark
-	end_mark := token.start_mark
-
-	var tag_token bool
-	var tag_handle, tag_suffix, anchor []byte
-	var tag_mark yaml_mark_t
-	if token.typ == yaml_ANCHOR_TOKEN {
-		anchor = token.value
-		start_mark = token.start_mark
-		end_mark = token.end_mark
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ == yaml_TAG_TOKEN {
-			tag_token = true
-			tag_handle = token.value
-			tag_suffix = token.suffix
-			tag_mark = token.start_mark
-			end_mark = token.end_mark
-			skip_token(parser)
-			token = peek_token(parser)
-			if token == nil {
-				return false
-			}
-		}
-	} else if token.typ == yaml_TAG_TOKEN {
-		tag_token = true
-		tag_handle = token.value
-		tag_suffix = token.suffix
-		start_mark = token.start_mark
-		tag_mark = token.start_mark
-		end_mark = token.end_mark
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ == yaml_ANCHOR_TOKEN {
-			anchor = token.value
-			end_mark = token.end_mark
-			skip_token(parser)
-			token = peek_token(parser)
-			if token == nil {
-				return false
-			}
-		}
-	}
-
-	var tag []byte
-	if tag_token {
-		if len(tag_handle) == 0 {
-			tag = tag_suffix
-			tag_suffix = nil
-		} else {
-			for i := range parser.tag_directives {
-				if bytes.Equal(parser.tag_directives[i].handle, tag_handle) {
-					tag = append([]byte(nil), parser.tag_directives[i].prefix...)
-					tag = append(tag, tag_suffix...)
-					break
-				}
-			}
-			if len(tag) == 0 {
-				yaml_parser_set_parser_error_context(parser,
-					"while parsing a node", start_mark,
-					"found undefined tag handle", tag_mark)
-				return false
-			}
-		}
-	}
-
-	implicit := len(tag) == 0
-	if indentless_sequence && token.typ == yaml_BLOCK_ENTRY_TOKEN {
-		end_mark = token.end_mark
-		parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE
-		*event = yaml_event_t{
-			typ:        yaml_SEQUENCE_START_EVENT,
-			start_mark: start_mark,
-			end_mark:   end_mark,
-			anchor:     anchor,
-			tag:        tag,
-			implicit:   implicit,
-			style:      yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE),
-		}
-		return true
-	}
-	if token.typ == yaml_SCALAR_TOKEN {
-		var plain_implicit, quoted_implicit bool
-		end_mark = token.end_mark
-		if (len(tag) == 0 && token.style == yaml_PLAIN_SCALAR_STYLE) || (len(tag) == 1 && tag[0] == '!') {
-			plain_implicit = true
-		} else if len(tag) == 0 {
-			quoted_implicit = true
-		}
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-
-		*event = yaml_event_t{
-			typ:             yaml_SCALAR_EVENT,
-			start_mark:      start_mark,
-			end_mark:        end_mark,
-			anchor:          anchor,
-			tag:             tag,
-			value:           token.value,
-			implicit:        plain_implicit,
-			quoted_implicit: quoted_implicit,
-			style:           yaml_style_t(token.style),
-		}
-		yaml_parser_set_event_comments(parser, event)
-		skip_token(parser)
-		return true
-	}
-	if token.typ == yaml_FLOW_SEQUENCE_START_TOKEN {
-		// [Go] Some of the events below can be merged as they differ only on style.
-		end_mark = token.end_mark
-		parser.state = yaml_PARSE_FLOW_SEQUENCE_FIRST_ENTRY_STATE
-		*event = yaml_event_t{
-			typ:        yaml_SEQUENCE_START_EVENT,
-			start_mark: start_mark,
-			end_mark:   end_mark,
-			anchor:     anchor,
-			tag:        tag,
-			implicit:   implicit,
-			style:      yaml_style_t(yaml_FLOW_SEQUENCE_STYLE),
-		}
-		yaml_parser_set_event_comments(parser, event)
-		return true
-	}
-	if token.typ == yaml_FLOW_MAPPING_START_TOKEN {
-		end_mark = token.end_mark
-		parser.state = yaml_PARSE_FLOW_MAPPING_FIRST_KEY_STATE
-		*event = yaml_event_t{
-			typ:        yaml_MAPPING_START_EVENT,
-			start_mark: start_mark,
-			end_mark:   end_mark,
-			anchor:     anchor,
-			tag:        tag,
-			implicit:   implicit,
-			style:      yaml_style_t(yaml_FLOW_MAPPING_STYLE),
-		}
-		yaml_parser_set_event_comments(parser, event)
-		return true
-	}
-	if block && token.typ == yaml_BLOCK_SEQUENCE_START_TOKEN {
-		end_mark = token.end_mark
-		parser.state = yaml_PARSE_BLOCK_SEQUENCE_FIRST_ENTRY_STATE
-		*event = yaml_event_t{
-			typ:        yaml_SEQUENCE_START_EVENT,
-			start_mark: start_mark,
-			end_mark:   end_mark,
-			anchor:     anchor,
-			tag:        tag,
-			implicit:   implicit,
-			style:      yaml_style_t(yaml_BLOCK_SEQUENCE_STYLE),
-		}
-		if parser.stem_comment != nil {
-			event.head_comment = parser.stem_comment
-			parser.stem_comment = nil
-		}
-		return true
-	}
-	if block && token.typ == yaml_BLOCK_MAPPING_START_TOKEN {
-		end_mark = token.end_mark
-		parser.state = yaml_PARSE_BLOCK_MAPPING_FIRST_KEY_STATE
-		*event = yaml_event_t{
-			typ:        yaml_MAPPING_START_EVENT,
-			start_mark: start_mark,
-			end_mark:   end_mark,
-			anchor:     anchor,
-			tag:        tag,
-			implicit:   implicit,
-			style:      yaml_style_t(yaml_BLOCK_MAPPING_STYLE),
-		}
-		if parser.stem_comment != nil {
-			event.head_comment = parser.stem_comment
-			parser.stem_comment = nil
-		}
-		return true
-	}
-	if len(anchor) > 0 || len(tag) > 0 {
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-
-		*event = yaml_event_t{
-			typ:             yaml_SCALAR_EVENT,
-			start_mark:      start_mark,
-			end_mark:        end_mark,
-			anchor:          anchor,
-			tag:             tag,
-			implicit:        implicit,
-			quoted_implicit: false,
-			style:           yaml_style_t(yaml_PLAIN_SCALAR_STYLE),
-		}
-		return true
-	}
-
-	context := "while parsing a flow node"
-	if block {
-		context = "while parsing a block node"
-	}
-	yaml_parser_set_parser_error_context(parser, context, start_mark,
-		"did not find expected node content", token.start_mark)
-	return false
-}
-
-// Parse the productions:
-// block_sequence ::= BLOCK-SEQUENCE-START (BLOCK-ENTRY block_node?)* BLOCK-END
-//                    ********************  *********** *             *********
-//
-func yaml_parser_parse_block_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
-	if first {
-		token := peek_token(parser)
-		if token == nil {
-			return false
-		}
-		parser.marks = append(parser.marks, token.start_mark)
-		skip_token(parser)
-	}
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	if token.typ == yaml_BLOCK_ENTRY_TOKEN {
-		mark := token.end_mark
-		prior_head_len := len(parser.head_comment)
-		skip_token(parser)
-		yaml_parser_split_stem_comment(parser, prior_head_len)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_BLOCK_ENTRY_TOKEN && token.typ != yaml_BLOCK_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE)
-			return yaml_parser_parse_node(parser, event, true, false)
-		} else {
-			parser.state = yaml_PARSE_BLOCK_SEQUENCE_ENTRY_STATE
-			return yaml_parser_process_empty_scalar(parser, event, mark)
-		}
-	}
-	if token.typ == yaml_BLOCK_END_TOKEN {
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-		parser.marks = parser.marks[:len(parser.marks)-1]
-
-		*event = yaml_event_t{
-			typ:        yaml_SEQUENCE_END_EVENT,
-			start_mark: token.start_mark,
-			end_mark:   token.end_mark,
-		}
-
-		skip_token(parser)
-		return true
-	}
-
-	context_mark := parser.marks[len(parser.marks)-1]
-	parser.marks = parser.marks[:len(parser.marks)-1]
-	return yaml_parser_set_parser_error_context(parser,
-		"while parsing a block collection", context_mark,
-		"did not find expected '-' indicator", token.start_mark)
-}
-
-// Parse the productions:
-// indentless_sequence  ::= (BLOCK-ENTRY block_node?)+
-//                           *********** *
-func yaml_parser_parse_indentless_sequence_entry(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	if token.typ == yaml_BLOCK_ENTRY_TOKEN {
-		mark := token.end_mark
-		prior_head_len := len(parser.head_comment)
-		skip_token(parser)
-		yaml_parser_split_stem_comment(parser, prior_head_len)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_BLOCK_ENTRY_TOKEN &&
-			token.typ != yaml_KEY_TOKEN &&
-			token.typ != yaml_VALUE_TOKEN &&
-			token.typ != yaml_BLOCK_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE)
-			return yaml_parser_parse_node(parser, event, true, false)
-		}
-		parser.state = yaml_PARSE_INDENTLESS_SEQUENCE_ENTRY_STATE
-		return yaml_parser_process_empty_scalar(parser, event, mark)
-	}
-	parser.state = parser.states[len(parser.states)-1]
-	parser.states = parser.states[:len(parser.states)-1]
-
-	*event = yaml_event_t{
-		typ:        yaml_SEQUENCE_END_EVENT,
-		start_mark: token.start_mark,
-		end_mark:   token.start_mark, // [Go] Shouldn't this be token.end_mark?
-	}
-	return true
-}
-
-// Split stem comment from head comment.
-//
-// When a sequence or map is found under a sequence entry, the former head comment
-// is assigned to the underlying sequence or map as a whole, not the individual
-// sequence or map entry as would be expected otherwise. To handle this case the
-// previous head comment is moved aside as the stem comment.
-func yaml_parser_split_stem_comment(parser *yaml_parser_t, stem_len int) {
-	if stem_len == 0 {
-		return
-	}
-
-	token := peek_token(parser)
-	if token == nil || token.typ != yaml_BLOCK_SEQUENCE_START_TOKEN && token.typ != yaml_BLOCK_MAPPING_START_TOKEN {
-		return
-	}
-
-	parser.stem_comment = parser.head_comment[:stem_len]
-	if len(parser.head_comment) == stem_len {
-		parser.head_comment = nil
-	} else {
-		// Copy suffix to prevent very strange bugs if someone ever appends
-		// further bytes to the prefix in the stem_comment slice above.
-		parser.head_comment = append([]byte(nil), parser.head_comment[stem_len+1:]...)
-	}
-}
-
-// Parse the productions:
-// block_mapping        ::= BLOCK-MAPPING_START
-//                          *******************
-//                          ((KEY block_node_or_indentless_sequence?)?
-//                            *** *
-//                          (VALUE block_node_or_indentless_sequence?)?)*
-//
-//                          BLOCK-END
-//                          *********
-//
-func yaml_parser_parse_block_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
-	if first {
-		token := peek_token(parser)
-		if token == nil {
-			return false
-		}
-		parser.marks = append(parser.marks, token.start_mark)
-		skip_token(parser)
-	}
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	// [Go] A tail comment was left from the prior mapping value processed. Emit an event
-	//      as it needs to be processed with that value and not the following key.
-	if len(parser.tail_comment) > 0 {
-		*event = yaml_event_t{
-			typ:          yaml_TAIL_COMMENT_EVENT,
-			start_mark:   token.start_mark,
-			end_mark:     token.end_mark,
-			foot_comment: parser.tail_comment,
-		}
-		parser.tail_comment = nil
-		return true
-	}
-
-	if token.typ == yaml_KEY_TOKEN {
-		mark := token.end_mark
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_KEY_TOKEN &&
-			token.typ != yaml_VALUE_TOKEN &&
-			token.typ != yaml_BLOCK_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_VALUE_STATE)
-			return yaml_parser_parse_node(parser, event, true, true)
-		} else {
-			parser.state = yaml_PARSE_BLOCK_MAPPING_VALUE_STATE
-			return yaml_parser_process_empty_scalar(parser, event, mark)
-		}
-	} else if token.typ == yaml_BLOCK_END_TOKEN {
-		parser.state = parser.states[len(parser.states)-1]
-		parser.states = parser.states[:len(parser.states)-1]
-		parser.marks = parser.marks[:len(parser.marks)-1]
-		*event = yaml_event_t{
-			typ:        yaml_MAPPING_END_EVENT,
-			start_mark: token.start_mark,
-			end_mark:   token.end_mark,
-		}
-		yaml_parser_set_event_comments(parser, event)
-		skip_token(parser)
-		return true
-	}
-
-	context_mark := parser.marks[len(parser.marks)-1]
-	parser.marks = parser.marks[:len(parser.marks)-1]
-	return yaml_parser_set_parser_error_context(parser,
-		"while parsing a block mapping", context_mark,
-		"did not find expected key", token.start_mark)
-}
-
-// Parse the productions:
-// block_mapping        ::= BLOCK-MAPPING_START
-//
-//                          ((KEY block_node_or_indentless_sequence?)?
-//
-//                          (VALUE block_node_or_indentless_sequence?)?)*
-//                           ***** *
-//                          BLOCK-END
-//
-//
-func yaml_parser_parse_block_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if token.typ == yaml_VALUE_TOKEN {
-		mark := token.end_mark
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_KEY_TOKEN &&
-			token.typ != yaml_VALUE_TOKEN &&
-			token.typ != yaml_BLOCK_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_BLOCK_MAPPING_KEY_STATE)
-			return yaml_parser_parse_node(parser, event, true, true)
-		}
-		parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE
-		return yaml_parser_process_empty_scalar(parser, event, mark)
-	}
-	parser.state = yaml_PARSE_BLOCK_MAPPING_KEY_STATE
-	return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
-}
-
-// Parse the productions:
-// flow_sequence        ::= FLOW-SEQUENCE-START
-//                          *******************
-//                          (flow_sequence_entry FLOW-ENTRY)*
-//                           *                   **********
-//                          flow_sequence_entry?
-//                          *
-//                          FLOW-SEQUENCE-END
-//                          *****************
-// flow_sequence_entry  ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                          *
-//
-func yaml_parser_parse_flow_sequence_entry(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
-	if first {
-		token := peek_token(parser)
-		if token == nil {
-			return false
-		}
-		parser.marks = append(parser.marks, token.start_mark)
-		skip_token(parser)
-	}
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
-		if !first {
-			if token.typ == yaml_FLOW_ENTRY_TOKEN {
-				skip_token(parser)
-				token = peek_token(parser)
-				if token == nil {
-					return false
-				}
-			} else {
-				context_mark := parser.marks[len(parser.marks)-1]
-				parser.marks = parser.marks[:len(parser.marks)-1]
-				return yaml_parser_set_parser_error_context(parser,
-					"while parsing a flow sequence", context_mark,
-					"did not find expected ',' or ']'", token.start_mark)
-			}
-		}
-
-		if token.typ == yaml_KEY_TOKEN {
-			parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_KEY_STATE
-			*event = yaml_event_t{
-				typ:        yaml_MAPPING_START_EVENT,
-				start_mark: token.start_mark,
-				end_mark:   token.end_mark,
-				implicit:   true,
-				style:      yaml_style_t(yaml_FLOW_MAPPING_STYLE),
-			}
-			skip_token(parser)
-			return true
-		} else if token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE)
-			return yaml_parser_parse_node(parser, event, false, false)
-		}
-	}
-
-	parser.state = parser.states[len(parser.states)-1]
-	parser.states = parser.states[:len(parser.states)-1]
-	parser.marks = parser.marks[:len(parser.marks)-1]
-
-	*event = yaml_event_t{
-		typ:        yaml_SEQUENCE_END_EVENT,
-		start_mark: token.start_mark,
-		end_mark:   token.end_mark,
-	}
-	yaml_parser_set_event_comments(parser, event)
-
-	skip_token(parser)
-	return true
-}
-
-//
-// Parse the productions:
-// flow_sequence_entry  ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                                      *** *
-//
-func yaml_parser_parse_flow_sequence_entry_mapping_key(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if token.typ != yaml_VALUE_TOKEN &&
-		token.typ != yaml_FLOW_ENTRY_TOKEN &&
-		token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
-		parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE)
-		return yaml_parser_parse_node(parser, event, false, false)
-	}
-	mark := token.end_mark
-	skip_token(parser)
-	parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_VALUE_STATE
-	return yaml_parser_process_empty_scalar(parser, event, mark)
-}
-
-// Parse the productions:
-// flow_sequence_entry  ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                                                      ***** *
-//
-func yaml_parser_parse_flow_sequence_entry_mapping_value(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if token.typ == yaml_VALUE_TOKEN {
-		skip_token(parser)
-		token := peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_SEQUENCE_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE)
-			return yaml_parser_parse_node(parser, event, false, false)
-		}
-	}
-	parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_MAPPING_END_STATE
-	return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
-}
-
-// Parse the productions:
-// flow_sequence_entry  ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                                                                      *
-//
-func yaml_parser_parse_flow_sequence_entry_mapping_end(parser *yaml_parser_t, event *yaml_event_t) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	parser.state = yaml_PARSE_FLOW_SEQUENCE_ENTRY_STATE
-	*event = yaml_event_t{
-		typ:        yaml_MAPPING_END_EVENT,
-		start_mark: token.start_mark,
-		end_mark:   token.start_mark, // [Go] Shouldn't this be end_mark?
-	}
-	return true
-}
-
-// Parse the productions:
-// flow_mapping         ::= FLOW-MAPPING-START
-//                          ******************
-//                          (flow_mapping_entry FLOW-ENTRY)*
-//                           *                  **********
-//                          flow_mapping_entry?
-//                          ******************
-//                          FLOW-MAPPING-END
-//                          ****************
-// flow_mapping_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                          *           *** *
-//
-func yaml_parser_parse_flow_mapping_key(parser *yaml_parser_t, event *yaml_event_t, first bool) bool {
-	if first {
-		token := peek_token(parser)
-		parser.marks = append(parser.marks, token.start_mark)
-		skip_token(parser)
-	}
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	if token.typ != yaml_FLOW_MAPPING_END_TOKEN {
-		if !first {
-			if token.typ == yaml_FLOW_ENTRY_TOKEN {
-				skip_token(parser)
-				token = peek_token(parser)
-				if token == nil {
-					return false
-				}
-			} else {
-				context_mark := parser.marks[len(parser.marks)-1]
-				parser.marks = parser.marks[:len(parser.marks)-1]
-				return yaml_parser_set_parser_error_context(parser,
-					"while parsing a flow mapping", context_mark,
-					"did not find expected ',' or '}'", token.start_mark)
-			}
-		}
-
-		if token.typ == yaml_KEY_TOKEN {
-			skip_token(parser)
-			token = peek_token(parser)
-			if token == nil {
-				return false
-			}
-			if token.typ != yaml_VALUE_TOKEN &&
-				token.typ != yaml_FLOW_ENTRY_TOKEN &&
-				token.typ != yaml_FLOW_MAPPING_END_TOKEN {
-				parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_VALUE_STATE)
-				return yaml_parser_parse_node(parser, event, false, false)
-			} else {
-				parser.state = yaml_PARSE_FLOW_MAPPING_VALUE_STATE
-				return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
-			}
-		} else if token.typ != yaml_FLOW_MAPPING_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_EMPTY_VALUE_STATE)
-			return yaml_parser_parse_node(parser, event, false, false)
-		}
-	}
-
-	parser.state = parser.states[len(parser.states)-1]
-	parser.states = parser.states[:len(parser.states)-1]
-	parser.marks = parser.marks[:len(parser.marks)-1]
-	*event = yaml_event_t{
-		typ:        yaml_MAPPING_END_EVENT,
-		start_mark: token.start_mark,
-		end_mark:   token.end_mark,
-	}
-	yaml_parser_set_event_comments(parser, event)
-	skip_token(parser)
-	return true
-}
-
-// Parse the productions:
-// flow_mapping_entry   ::= flow_node | KEY flow_node? (VALUE flow_node?)?
-//                                   *                  ***** *
-//
-func yaml_parser_parse_flow_mapping_value(parser *yaml_parser_t, event *yaml_event_t, empty bool) bool {
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-	if empty {
-		parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE
-		return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
-	}
-	if token.typ == yaml_VALUE_TOKEN {
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-		if token.typ != yaml_FLOW_ENTRY_TOKEN && token.typ != yaml_FLOW_MAPPING_END_TOKEN {
-			parser.states = append(parser.states, yaml_PARSE_FLOW_MAPPING_KEY_STATE)
-			return yaml_parser_parse_node(parser, event, false, false)
-		}
-	}
-	parser.state = yaml_PARSE_FLOW_MAPPING_KEY_STATE
-	return yaml_parser_process_empty_scalar(parser, event, token.start_mark)
-}
-
-// Generate an empty scalar event.
-func yaml_parser_process_empty_scalar(parser *yaml_parser_t, event *yaml_event_t, mark yaml_mark_t) bool {
-	*event = yaml_event_t{
-		typ:        yaml_SCALAR_EVENT,
-		start_mark: mark,
-		end_mark:   mark,
-		value:      nil, // Empty
-		implicit:   true,
-		style:      yaml_style_t(yaml_PLAIN_SCALAR_STYLE),
-	}
-	return true
-}
-
-var default_tag_directives = []yaml_tag_directive_t{
-	{[]byte("!"), []byte("!")},
-	{[]byte("!!"), []byte("tag:yaml.org,2002:")},
-}
-
-// Parse directives.
-func yaml_parser_process_directives(parser *yaml_parser_t,
-	version_directive_ref **yaml_version_directive_t,
-	tag_directives_ref *[]yaml_tag_directive_t) bool {
-
-	var version_directive *yaml_version_directive_t
-	var tag_directives []yaml_tag_directive_t
-
-	token := peek_token(parser)
-	if token == nil {
-		return false
-	}
-
-	for token.typ == yaml_VERSION_DIRECTIVE_TOKEN || token.typ == yaml_TAG_DIRECTIVE_TOKEN {
-		if token.typ == yaml_VERSION_DIRECTIVE_TOKEN {
-			if version_directive != nil {
-				yaml_parser_set_parser_error(parser,
-					"found duplicate %YAML directive", token.start_mark)
-				return false
-			}
-			if token.major != 1 || token.minor != 1 {
-				yaml_parser_set_parser_error(parser,
-					"found incompatible YAML document", token.start_mark)
-				return false
-			}
-			version_directive = &yaml_version_directive_t{
-				major: token.major,
-				minor: token.minor,
-			}
-		} else if token.typ == yaml_TAG_DIRECTIVE_TOKEN {
-			value := yaml_tag_directive_t{
-				handle: token.value,
-				prefix: token.prefix,
-			}
-			if !yaml_parser_append_tag_directive(parser, value, false, token.start_mark) {
-				return false
-			}
-			tag_directives = append(tag_directives, value)
-		}
-
-		skip_token(parser)
-		token = peek_token(parser)
-		if token == nil {
-			return false
-		}
-	}
-
-	for i := range default_tag_directives {
-		if !yaml_parser_append_tag_directive(parser, default_tag_directives[i], true, token.start_mark) {
-			return false
-		}
-	}
-
-	if version_directive_ref != nil {
-		*version_directive_ref = version_directive
-	}
-	if tag_directives_ref != nil {
-		*tag_directives_ref = tag_directives
-	}
-	return true
-}
-
-// Append a tag directive to the directives stack.
-func yaml_parser_append_tag_directive(parser *yaml_parser_t, value yaml_tag_directive_t, allow_duplicates bool, mark yaml_mark_t) bool {
-	for i := range parser.tag_directives {
-		if bytes.Equal(value.handle, parser.tag_directives[i].handle) {
-			if allow_duplicates {
-				return true
-			}
-			return yaml_parser_set_parser_error(parser, "found duplicate %TAG directive", mark)
-		}
-	}
-
-	// [Go] I suspect the copy is unnecessary. This was likely done
-	// because there was no way to track ownership of the data.
-	value_copy := yaml_tag_directive_t{
-		handle: make([]byte, len(value.handle)),
-		prefix: make([]byte, len(value.prefix)),
-	}
-	copy(value_copy.handle, value.handle)
-	copy(value_copy.prefix, value.prefix)
-	parser.tag_directives = append(parser.tag_directives, value_copy)
-	return true
-}