Module ryan::parser

The Ryan language per se, with parsing and evaluating functions and the types building the Abstract Syntax Tree.

Structs

• BinaryOperation
  An operation involving two Ryan expressions and a binary operator.
• Block
  A block of Ryan code. This consists of a list of statements and a return expression at the end.
• Dict
  An association of string values to Ryan values.
• ErrorEntry
  An entry of a post-parsing error, logged by ErrorLogger.
• ErrorLogger
  A logger of errors that happen post-parsing. Post parsing always succeeds, even with a list of errors. It’s the whole parsing processing that fails if there are post-parsing errors.
• EvalError
  An error that happens during the execution of a Ryan program.
• Import
  An import statement.
• KeyValue
  An entry of a dictionary expression.
• ListComprehension
  A Python-style list comprehension. This is the nearest thing to for statement that you will get in Ryan.
• MatchDictItem
  A pattern matching a dictionary entry. This can take the form of x, which binds the value associated to the key x to the variable x or x: pattern which bind the value associated with xto another pattern. Of note is that, in this position, pattern cannot be an identifier pattern.
• NotIterable
  Error when the user tries to iterate over non-iterable values.
• NotRepresentable
  An error raised when a Value has no counterpart in JSON, e.g., a type or a pattern match rule.
• ParseError
  A general parsing error.
• PatternMatch
  A pattern match rule introduced by a biding.
• PostfixOperation
  An operation involving a Ryan expression and a postfix operator.
• PrefixOperation
  An operation involving a Ryan expression and a prefix operator.

Enums

• BinaryOperator
  An operation involving two Ryan values.
• Binding
  A binding is a let ... = ...; or a type ... = ...; statement that creates new variables, types and patterns.
• Expression
  Transformations of Ryan values.
• Format
  The way the imported value should be imported into Ryan.
• Literal
  A literal Ryan value.
• Pattern
  An expression expecting a certain structure of a given value and optionally binding variables to selected bits and pieces of this value.
• PostfixOperator
  An operation involving one Ryan value, where the value precedes it.
• PrefixOperator
  An operation involving one Ryan value, where the value follows it.
• Rule
• Type
  The type of a Ryan value.
• TypeExpression
  Ans expression returning a concrete Ryan type.
• Value
  A Ryan value.

Functions

• eval
  Executes a block in a given environment, returning the resulting value.
• parse
  Parses a Ryan string and returns an abstract syntax tree (AST) object, represented by its root, a Block.