ShockScript: Patterns

Destructuring patterns may be used in a number of contexts, including variable bindings, try..catch clauses, switch type cases and assignment left-hand sides.

Where applicable, expressions are disambiguated into destructuring patterns, in which case any incompatible or illegal expression results in a syntax error; for example, an expression is disambiguated in a pattern in an assignment whose left-hand side starts with a bracket [ or a brace {.

Syntax

Pattern :
Identifier [when keywords are enabled]
IdentifierName [when keywords are disabled]
ArrayPattern
ObjectPattern

TypedPattern :
Pattern [lookahead ≠ :]
Pattern : TypeExpression