OpenUI.Parser.Expression (OpenUI v0.1.1)

Parses tokens into an expression tree (language.md, sections 1.5 and 1.6) by precedence climbing, and classifies statements (section 2.1).

Like the lexer, parsing never fails: a token that cannot start an operand reads as null, a missing closer is assumed, and tokens left after a complete expression are dropped.

Summary

Types

ast()

Functions

parse(tokens)

Parses one expression from tokens.

parse_statement(source)

Parses the source of one statement. Returns nil when the text does not have the name = expression shape.

Types

ast()

@type ast() ::
  {:string, String.t()}
  | {:number, number()}
  | {:boolean, boolean()}
  | :null
  | {:array, [ast()]}
  | {:object, [{String.t(), ast()}]}
  | {:ref, String.t()}
  | {:state, String.t()}
  | {:component, String.t(), [ast()]}
  | {:call, String.t(), [ast()]}
  | {:binary, String.t(), ast(), ast()}
  | {:unary, String.t(), ast()}
  | {:ternary, ast(), ast(), ast()}
  | {:member, ast(), String.t()}
  | {:index, ast(), ast()}
  | {:assign, String.t(), ast()}
  | {:unresolved, String.t()}
  | {:runtime_ref, String.t(), :query | :mutation}

Functions

parse(tokens)

@spec parse([OpenUI.Parser.Lexer.token()]) :: ast()

Parses one expression from tokens.

parse_statement(source)

@spec parse_statement(String.t()) :: OpenUI.Statement.t() | nil

Parses the source of one statement. Returns nil when the text does not have the name = expression shape.