Documentation

Serialize a Pattern Subject to gram notation.

Converts a Pattern Subject data structure into its gram notation string representation. The output follows the gram notation specification: - Patterns with elements use subject syntax: `[attributes | elements]` - Patterns without elements use node syntax: (attributes)

Examples

Simple node (no elements):

>>> import Pattern.Core (Pattern(..))
>>> import Subject.Core (Subject(..), Symbol(..))
>>> import Data.Set (Set)
>>> import qualified Data.Set as Set
>>> let s = Subject (Symbol "n") (Set.fromList ["Person"]) empty
>>> let p = Pattern { value = s, elements = [] }
>>> toGram p
"(n:Person)"

Node with properties (no elements):

>>> import Data.Map (fromList)
>>> import Subject.Value (VString)
>>> let s = Subject (Symbol "n") (Set.fromList ["Person"]) (fromList [("name", VString "Alice")])
>>> let p = Pattern { value = s, elements = [] }
>>> toGram p
"(n:Person {name:\"Alice\"})"

Subject with nested elements:

>>> let inner1 = Pattern (Subject (Symbol "a") Set.empty empty) []
>>> let inner2 = Pattern (Subject (Symbol "b") Set.empty empty) []
>>> let outer = Pattern (Subject (Symbol "g") Set.empty empty) [inner1, inner2]
>>> toGram outer
"[g | a, b]"

Character threshold for codefence serialization.

Strings with length greater than this value will be serialized using codefence format (triple-backticks). Length is measured as total character count including newline characters.

Strings of this length or fewer use standard quote-delimited format.

Examples

>>> codefenceThreshold
120

>>> length "short string" <= codefenceThreshold
True