Function yaml_emitter_analyze_scalar

emitterc.go:1255–1406

Check if a scalar is valid.

(emitter *yaml_emitter_t, value []byte)

// Check if a scalar is valid.
func yaml_emitter_analyze_scalar(emitter *yaml_emitter_t, value []byte) bool {
	var (
		block_indicators   = false
		flow_indicators    = false
		line_breaks        = false
		special_characters = false
		tab_characters     = false

		leading_space  = false
		leading_break  = false
		trailing_space = false
		trailing_break = false
		break_space    = false
		space_break    = false

		preceded_by_whitespace = false
		followed_by_whitespace = false
		previous_space         = false
		previous_break         = false
	)

	emitter.scalar_data.value = value

	if len(value) == 0 {
		emitter.scalar_data.multiline = false
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = true
		emitter.scalar_data.single_quoted_allowed = true
		emitter.scalar_data.block_allowed = false
		return true
	}

	if len(value) >= 3 && ((value[0] == '-' && value[1] == '-' && value[2] == '-') || (value[0] == '.' && value[1] == '.' && value[2] == '.')) {
		block_indicators = true
		flow_indicators = true
	}

	preceded_by_whitespace = true
	for i, w := 0, 0; i < len(value); i += w {
		w = width(value[i])
		followed_by_whitespace = i+w >= len(value) || is_blank(value, i+w)

		if i == 0 {
			switch value[i] {
			case '#', ',', '[', ']', '{', '}', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`':
				flow_indicators = true
				block_indicators = true
			case '?', ':':
				flow_indicators = true
				if followed_by_whitespace {
					block_indicators = true
				}
			case '-':
				if followed_by_whitespace {
					flow_indicators = true
					block_indicators = true
				}
			}