Module: Dms::Tier1

Defined in:
lib/dms/tier1.rb

Defined Under Namespace

Classes: DecoratorCall, DecoratorEntry, DocumentT1, ImportSpec, InlineValueParser, ParamGroup, SingleValueParser, T1Parser

Constant Summary collapse

RESERVED_SIGIL_CHARS =

Reserved decorator sigil characters (tier-0 set, no underscore). ! @ $ % ^ & * | ~ ‘ . , > < ? ; =

"!@$%^&*|~`.,><?;=".chars.to_set.freeze
EXTENDED_PICTOGRAPHIC_RANGES =

Extended_Pictographic=Yes ranges (frozen UCD 15.1), sourced from Rust ref.

[
  [0x00A9, 0x00A9], [0x00AE, 0x00AE], [0x203C, 0x203C], [0x2049, 0x2049],
  [0x2122, 0x2122], [0x2139, 0x2139], [0x2194, 0x2199], [0x21A9, 0x21AA],
  [0x231A, 0x231B], [0x2328, 0x2328], [0x2388, 0x2388], [0x23CF, 0x23CF],
  [0x23E9, 0x23F3], [0x23F8, 0x23FA], [0x24C2, 0x24C2], [0x25AA, 0x25AB],
  [0x25B6, 0x25B6], [0x25C0, 0x25C0], [0x25FB, 0x25FE], [0x2600, 0x2605],
  [0x2607, 0x2612], [0x2614, 0x2685], [0x2690, 0x2705], [0x2708, 0x2712],
  [0x2714, 0x2714], [0x2716, 0x2716], [0x271D, 0x271D], [0x2721, 0x2721],
  [0x2728, 0x2728], [0x2733, 0x2734], [0x2744, 0x2744], [0x2747, 0x2747],
  [0x274C, 0x274C], [0x274E, 0x274E], [0x2753, 0x2755], [0x2757, 0x2757],
  [0x2763, 0x2767], [0x2795, 0x2797], [0x27A1, 0x27A1], [0x27B0, 0x27B0],
  [0x27BF, 0x27BF], [0x2934, 0x2935], [0x2B05, 0x2B07], [0x2B1B, 0x2B1C],
  [0x2B50, 0x2B50], [0x2B55, 0x2B55], [0x3030, 0x3030], [0x303D, 0x303D],
  [0x3297, 0x3297], [0x3299, 0x3299], [0x1F000, 0x1F0FF], [0x1F10D, 0x1F10F],
  [0x1F12F, 0x1F12F], [0x1F16C, 0x1F171], [0x1F17E, 0x1F17F], [0x1F18E, 0x1F18E],
  [0x1F191, 0x1F19A], [0x1F1AD, 0x1F1E5], [0x1F201, 0x1F20F], [0x1F21A, 0x1F21A],
  [0x1F22F, 0x1F22F], [0x1F232, 0x1F23A], [0x1F23C, 0x1F23F], [0x1F249, 0x1F3FA],
  [0x1F400, 0x1F53D], [0x1F546, 0x1F64F], [0x1F680, 0x1F6FF], [0x1F774, 0x1F77F],
  [0x1F7D5, 0x1F7FF], [0x1F80C, 0x1F80F], [0x1F848, 0x1F84F], [0x1F85A, 0x1F85F],
  [0x1F888, 0x1F88F], [0x1F8AE, 0x1F8FF], [0x1F90C, 0x1F93A], [0x1F93C, 0x1F945],
  [0x1F947, 0x1FAFF], [0x1FC00, 0x1FFFD],
].freeze
RANGE_SPECIFIER_PREFIXES =

── Semver helpers ──────────────────────────────────────────────────────

%w[^ ~ >= > < <= =].freeze

Class Method Summary collapse

Class Method Details

.call_to_json(call, tag_fn) ⇒ Object 



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# File 'lib/dms/tier1.rb', line 1727

def self.call_to_json(call, tag_fn)
  params_json = call.params.map { |pg| param_group_to_json(pg, tag_fn) }
  {
    "family"     => call.family,
    "fn"         => call.fn_name,
    "ns"         => call.ns,
    "position"   => call.position.to_s,
    "params"     => params_json,
    "params_dec" => []
  }
end

.emit_t1_json(doc_t1, tag_fn) ⇒ Object

── JSON emission ────────────────────────────────────────────────────────



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# File 'lib/dms/tier1.rb', line 1667

def self.emit_t1_json(doc_t1, tag_fn)
  imports_json = doc_t1.imports.map { |imp| import_to_json(imp) }
  body_tagged = tag_fn.call(doc_t1.t0.body)
  decorators_json = doc_t1.decorators.map { |entry| entry_to_json(entry, tag_fn) }

  {
    "tier"       => doc_t1.observed_tier,
    "imports"    => imports_json,
    "body"       => body_tagged,
    "decorators" => decorators_json
  }
end

.emoji_modifier?(cp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 75

def self.emoji_modifier?(cp)
  cp >= 0x1F3FB && cp <= 0x1F3FF
end

.entry_to_json(entry, tag_fn) ⇒ Object 



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# File 'lib/dms/tier1.rb', line 1706

def self.entry_to_json(entry, tag_fn)
  path_json = entry.path.map do |seg|
    if seg.key?("key")
      { "key" => seg["key"] }
    else
      { "index" => seg["index"] }
    end
  end

  calls_json = {}
  entry.calls.each do |sigil, calls|
    calls_json[sigil] = calls.map { |c| call_to_json(c, tag_fn) }
  end

  {
    "path"       => path_json,
    "calls"      => calls_json,
    "comments"   => []
  }
end

.extended_pictographic?(cp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 46

def self.extended_pictographic?(cp)
  return false if cp < 0xA9
  lo = 0
  hi = EXTENDED_PICTOGRAPHIC_RANGES.length - 1
  while lo <= hi
    mid = (lo + hi) / 2
    range_lo, range_hi = EXTENDED_PICTOGRAPHIC_RANGES[mid]
    if cp < range_lo
      hi = mid - 1
    elsif cp > range_hi
      lo = mid + 1
    else
      return true
    end
  end
  false
end

.extract_imports(meta) ⇒ Object

── Import extraction and validation ────────────────────────────────────



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# File 'lib/dms/tier1.rb', line 276

def self.extract_imports(meta)
  raw_list = meta["_dms_imports"]
  return [] if raw_list.nil?

  unless raw_list.is_a?(Array)
    raise DecodeError.new(0, 0, "_dms_imports must be a list")
  end

  specs = []
  # Seen (sigil, ns_repr, family) triples for collision detection
  seen_triples = {}

  raw_list.each_with_index do |entry, idx|
    unless entry.is_a?(Hash)
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}] must be a table")
    end

    # dialect (required string)
    dialect = entry["dialect"]
    case dialect
    when nil
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}] is missing required field 'dialect'")
    when String
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}].dialect must be a non-empty string") if dialect.empty?
    else
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}].dialect must be a string")
    end

    # version (required string, semver, no range specifiers)
    version = entry["version"]
    case version
    when nil
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}] is missing required field 'version'")
    when String
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}].version must be a non-empty string") if version.empty?
      if has_range_specifier?(version)
        raise DecodeError.new(0, 0,
          "range-specifier syntax in version not supported " \
          "(_dms_imports[#{idx}].version \"#{version}\"): write a plain semver string")
      end
      unless valid_semver?(version)
        raise DecodeError.new(0, 0,
          "_dms_imports[#{idx}].version \"#{version}\" is not a valid semver string " \
          "(expected MAJOR.MINOR.PATCH with optional -pre and +build)")
      end
    else
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}].version must be a string")
    end

    # ns (optional string)
    ns_val = entry["ns"]
    ns = case ns_val
         when nil then nil
         when String
           raise DecodeError.new(0, 0, "_dms_imports[#{idx}].ns must be a non-empty string when present") if ns_val.empty?
           ns_val
         else
           raise DecodeError.new(0, 0, "_dms_imports[#{idx}].ns must be a string")
         end

    # bind (optional table: sigil → list of family names)
    bind = {}
    if (bind_val = entry["bind"])
      unless bind_val.is_a?(Hash)
        raise DecodeError.new(0, 0, "_dms_imports[#{idx}].bind must be a table")
      end
      bind_val.each do |sigil, families_val|
        if sigil.empty?
          raise DecodeError.new(0, 0, "_dms_imports[#{idx}].bind has an empty sigil key")
        end
        err = Tier1.validate_sigil_atoms(sigil, idx)
        raise DecodeError.new(0, 0, err) if err
        unless families_val.is_a?(Array)
          raise DecodeError.new(0, 0,
            "_dms_imports[#{idx}].bind[\"#{sigil}\"] must be a list " \
            "(use list form even for a single family)")
        end
        names = families_val.map do |item|
          unless item.is_a?(String)
            raise DecodeError.new(0, 0, "_dms_imports[#{idx}].bind[\"#{sigil}\"] must be a list of strings")
          end
          item
        end
        bind[sigil] = names
      end
    end

    # allow (optional table: family → list of names)
    allow_map = {}
    if (allow_val = entry["allow"])
      unless allow_val.is_a?(Hash)
        raise DecodeError.new(0, 0, "_dms_imports[#{idx}].allow must be a table")
      end
      allow_val.each do |family, names_val|
        allow_map[family] = extract_string_list(names_val, idx, "allow", family)
      end
    end

    # deny (optional table: family → list of names)
    deny_map = {}
    if (deny_val = entry["deny"])
      unless deny_val.is_a?(Hash)
        raise DecodeError.new(0, 0, "_dms_imports[#{idx}].deny must be a table")
      end
      deny_val.each do |family, names_val|
        deny_map[family] = extract_string_list(names_val, idx, "deny", family)
      end
    end

    # allow/deny mutual exclusion
    allow_map.each_key do |family|
      if deny_map.key?(family)
        raise DecodeError.new(0, 0,
          "_dms_imports[#{idx}]: family \"#{family}\" appears in both " \
          "'allow' and 'deny' — they are mutually exclusive for the same family")
      end
    end

    # alias (optional table: family → table: alias → canonical)
    alias_map = {}
    if (alias_val = entry["alias"])
      unless alias_val.is_a?(Hash)
        raise DecodeError.new(0, 0, "_dms_imports[#{idx}].alias must be a table")
      end
      alias_val.each do |family, inner_val|
        unless inner_val.is_a?(Hash)
          raise DecodeError.new(0, 0,
            "_dms_imports[#{idx}].alias[\"#{family}\"] must be a table (alias → canonical)")
        end
        inner_map = {}
        inner_val.each do |alias_name, canonical_val|
          unless canonical_val.is_a?(String)
            raise DecodeError.new(0, 0,
              "_dms_imports[#{idx}].alias[\"#{family}\"][\"#{alias_name}\"] must be a string")
          end
          inner_map[alias_name] = canonical_val
        end
        alias_map[family] = inner_map
      end
    end

    # Cross-import collision detection
    ns_repr = ns || "<unset>"
    bind.each do |sigil, families|
      families.each do |family|
        triple_key = "#{sigil}|#{ns_repr}|#{family}"
        if (prev_idx = seen_triples[triple_key])
          prev = specs[prev_idx]
          raise DecodeError.new(0, 0,
            "Decorator binding collision on (sigil='#{sigil}', ns=#{ns_repr}, " \
            "family='#{family}'): " \
            "import ##{prev_idx} dialect '#{prev.dialect}' v#{prev.version} and " \
            "import ##{idx} dialect '#{dialect}' v#{version} both bind " \
            "'#{sigil}' → '#{family}'. Resolve by remapping one.")
        end
        seen_triples[triple_key] = idx
      end
    end

    specs << ImportSpec.new(
      dialect: dialect,
      version: version,
      ns: ns,
      bind: bind,
      allow: allow_map,
      deny: deny_map,
      alias_map: alias_map
    )
  end

  specs
end

.extract_string_list(val, idx, field, family) ⇒ Object 



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# File 'lib/dms/tier1.rb', line 449

def self.extract_string_list(val, idx, field, family)
  unless val.is_a?(Array)
    raise DecodeError.new(0, 0, "_dms_imports[#{idx}].#{field}[\"#{family}\"] must be a list")
  end
  val.map do |item|
    unless item.is_a?(String)
      raise DecodeError.new(0, 0, "_dms_imports[#{idx}].#{field}[\"#{family}\"] must be a list of strings")
    end
    item
  end
end

.has_range_specifier?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 269

def self.has_range_specifier?(s)
  trimmed = s.lstrip
  RANGE_SPECIFIER_PREFIXES.any? { |p| trimmed.start_with?(p) }
end

.import_to_json(imp) ⇒ Object 



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# File 'lib/dms/tier1.rb', line 1680

def self.import_to_json(imp)
  bind_json = {}
  imp.bind.each { |sigil, fams| bind_json[sigil] = fams }

  allow_json = {}
  imp.allow.each { |family, names| allow_json[family] = names }

  deny_json = {}
  imp.deny.each { |family, names| deny_json[family] = names }

  alias_json = {}
  imp.alias_map.each do |family, inner|
    alias_json[family] = inner
  end

  {
    "dialect" => imp.dialect,
    "version" => imp.version,
    "ns"      => imp.ns,
    "bind"    => bind_json,
    "allow"   => allow_json,
    "deny"    => deny_json,
    "alias"   => alias_json
  }
end

.lex_sigil_atom_at(s, pos) ⇒ Object

Lex one sigil atom at byte offset ‘pos` in UTF-8 string `s`. Returns byte-length of the atom (1 for ASCII, cluster len for emoji), or nil if no sigil atom here.



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# File 'lib/dms/tier1.rb', line 163

def self.lex_sigil_atom_at(s, pos)
  return nil if pos >= s.bytesize
  b = s.getbyte(pos)
  return nil if b.nil?
  # ASCII reserved sigil char
  if b < 0x80
    return RESERVED_SIGIL_CHARS.include?(b.chr) ? 1 : nil
  end
  # Multi-byte: try emoji cluster
  end_pos = read_reserved_emoji_atom(s, pos)
  return nil if end_pos.nil?
  end_pos - pos
end

.param_group_to_json(pg, tag_fn) ⇒ Object 



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# File 'lib/dms/tier1.rb', line 1739

def self.param_group_to_json(pg, tag_fn)
  case pg.kind
  when :named
    tagged_val = {}
    pg.value.each { |k, v| tagged_val[k] = tag_fn.call(v) }
    { "kind" => "named", "value" => tagged_val }
  when :positional
    { "kind" => "positional", "value" => pg.value.map { |v| tag_fn.call(v) } }
  end
end

.parse(src) ⇒ Object

Parse a DMS source string in tier-1 mode. Returns DocumentT1.



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# File 'lib/dms/tier1.rb', line 547

def self.parse(src)
  T1Parser.new(src).parse
end

.read_reserved_emoji_atom(s, start) ⇒ Object

Read one extended grapheme cluster of reserved-emoji shape starting at byte offset ‘start` in `s` (UTF-8 string). Returns the exclusive end byte offset, or nil if no emoji cluster starts here. Algorithm mirrors Rust read_reserved_emoji_atom exactly.



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# File 'lib/dms/tier1.rb', line 83

def self.read_reserved_emoji_atom(s, start)
  return nil if start >= s.bytesize
  # Decode first codepoint
  sub = s.byteslice(start, s.bytesize - start)
  return nil if sub.nil? || sub.empty?
  sub = sub.force_encoding("UTF-8")
  c0 = sub[0]
  return nil if c0.nil?
  cp0 = c0.ord
  return nil unless reserved_emoji_codepoint?(cp0)
  len0 = c0.bytesize
  end_pos = start + len0

  # Regional-indicator pair (GB12/GB13)
  if regional_indicator?(cp0)
    rest = s.byteslice(end_pos, s.bytesize - end_pos)
    if rest && !rest.empty?
      rest = rest.force_encoding("UTF-8")
      c1 = rest[0]
      if c1 && regional_indicator?(c1.ord)
        end_pos += c1.bytesize
      end
    end
    return end_pos
  end

  # GB9/GB9a/GB11 loop
  loop do
    rest = s.byteslice(end_pos, s.bytesize - end_pos)
    break if rest.nil? || rest.empty?
    rest = rest.force_encoding("UTF-8")
    c = rest[0]
    break if c.nil?
    cp = c.ord
    if emoji_modifier?(cp) || cp == 0xFE0F || cp == 0x20E3
      # GB9/GB9a - Extend or SpacingMark
      end_pos += c.bytesize
      next
    end
    if cp == 0x200D
      # GB11 - ZWJ x Extended_Pictographic
      after_zwj = end_pos + c.bytesize
      after = s.byteslice(after_zwj, s.bytesize - after_zwj)
      if after && !after.empty?
        after = after.force_encoding("UTF-8")
        nc = after[0]
        if nc && extended_pictographic?(nc.ord)
          end_pos = after_zwj + nc.bytesize
          next
        end
      end
      # ZWJ not followed by E_P: cluster ends before ZWJ
      break
    end
    break
  end
  end_pos
end

.regional_indicator?(cp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 71

def self.regional_indicator?(cp)
  cp >= 0x1F1E6 && cp <= 0x1F1FF
end

.reserved_emoji_codepoint?(cp) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 64

def self.reserved_emoji_codepoint?(cp)
  return true if cp >= 0x1F1E6 && cp <= 0x1F1FF  # regional indicator
  return true if cp >= 0x1F3FB && cp <= 0x1F3FF  # skin-tone modifier
  return true if cp == 0x20E3                      # keycap combiner
  extended_pictographic?(cp)
end

.resolve_family(sigil, fn_name, ns, imports) ⇒ Object

Resolve a decorator call’s family from imports. Returns [family_name, canonical_fn_name] or raises. Also applies deny-list check.



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# File 'lib/dms/tier1.rb', line 466

def self.resolve_family(sigil, fn_name, ns, imports)
  # Filter imports by ns if specified
  candidate_imports = if ns
                        filtered = imports.select { |imp| imp.ns == ns }
                        if filtered.empty?
                          raise DecodeError.new(0, 0, "unknown namespace '#{ns}'")
                        end
                        filtered
                      else
                        imports
                      end

  # For each import, check families bound to this sigil
  # Apply aliases and allow/deny rules
  accepted = []  # [family_name, canonical_fn_name]

  candidate_imports.each do |imp|
    families = imp.bind[sigil]
    next unless families

    families.each do |family|
      # Apply alias: fn_name might be an alias
      canonical =
        if (family_aliases = imp.alias_map[family])
          family_aliases[fn_name] || fn_name
        else
          fn_name
        end

      # Apply deny list
      if (deny_list = imp.deny[family])
        next if deny_list.include?(canonical)
      end

      # Apply allow list
      if (allow_list = imp.allow[family])
        next unless allow_list.include?(canonical)
      end

      accepted << [family, canonical]
    end
  end

  if accepted.empty?
    # Check if sigil is bound at all in any import
    sigil_bound = candidate_imports.any? { |imp| imp.bind.key?(sigil) }
    unless sigil_bound
      raise DecodeError.new(0, 0,
        "name '#{fn_name}' not found in any family bound to sigil '#{sigil}'")
    end
    # Sigil IS bound but fn_name was filtered out (denied or not allowed).
    # Check deny against all imports for the deny_rejected test.
    candidate_imports.each do |imp|
      families = imp.bind[sigil]
      next unless families
      families.each do |family|
        canonical = fn_name
        if (family_aliases = imp.alias_map[family])
          canonical = family_aliases[fn_name] || fn_name
        end
        if (deny_list = imp.deny[family])
          if deny_list.include?(canonical)
            raise DecodeError.new(0, 0,
              "decorator '#{fn_name}' is denied by family '#{family}' deny list")
          end
        end
      end
    end
    # Filtered by allow list — also an error
    raise DecodeError.new(0, 0,
      "name '#{fn_name}' not found in any family bound to sigil '#{sigil}'")
  end

  # Use first accepted
  accepted.first
end

.sigil_atom_start_at?(s, pos) ⇒ Boolean

Returns true if the character at byte offset ‘pos` in UTF-8 string `s` starts a sigil atom (ASCII reserved char OR reserved emoji codepoint).

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 144

def self.sigil_atom_start_at?(s, pos)
  return false if pos >= s.bytesize
  b = s.getbyte(pos)
  return false if b.nil?
  # ASCII reserved sigil
  return true if RESERVED_SIGIL_CHARS.include?(b.chr)
  # Multi-byte: check if it's a reserved emoji codepoint
  return false if b < 0x80
  sub = s.byteslice(pos, s.bytesize - pos)
  return false if sub.nil? || sub.empty?
  sub = sub.force_encoding("UTF-8")
  c = sub[0]
  return false if c.nil?
  reserved_emoji_codepoint?(c.ord)
end

.valid_semver?(s) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/dms/tier1.rb', line 243

def self.valid_semver?(s)
  # Drop build metadata
  s = s.split("+", 2).first
  # Split pre-release
  core_str, pre_str = s.split("-", 2)
  parts = core_str.split(".", -1)
  return false unless parts.length == 3
  parts.each do |p|
    return false if p.empty?
    return false if p.length > 1 && p.start_with?("0")
    return false unless p.match?(/\A\d+\z/)
  end
  if pre_str
    return false if pre_str.empty?
    pre_str.split(".").each do |id|
      return false if id.empty?
      if id.match?(/\A\d+\z/)
        return false if id.length > 1 && id.start_with?("0")
      else
        return false unless id.match?(/\A[A-Za-z0-9\-]+\z/)
      end
    end
  end
  true
end

.validate_sigil_atoms(sigil, idx) ⇒ Object

Validate that a sigil string consists of valid sigil atoms only. Returns nil on success, error message string on failure.



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# File 'lib/dms/tier1.rb', line 179

def self.validate_sigil_atoms(sigil, idx)
  s = sigil.encode("UTF-8") rescue sigil
  pos = 0
  while pos < s.bytesize
    atom_len = lex_sigil_atom_at(s, pos)
    if atom_len.nil?
      # Decode the char at pos for the error message
      sub = s.byteslice(pos, s.bytesize - pos).force_encoding("UTF-8")
      c = sub[0] || "?"
      if c == "_"
        return "_dms_imports[#{idx}].bind key \"#{sigil}\" (or containing '_') " \
          "is invalid: underscore is not in the tier-0 reserved decorator sigil set"
      end
      return "_dms_imports[#{idx}].bind key \"#{sigil}\" contains '#{c}' " \
        "which is not in the tier-0 reserved decorator sigil set " \
        "nor in the Reserved Emoji Set"
    end
    pos += atom_len
  end
  nil
end