v1.15.8

Expr is a Go-centric expression language designed to deliver dynamic configurations with unparalleled accuracy,
safety, and speed.

output, err := expr.Eval(`now() - created_at < duration("24h")`, env)

In this release

• Added builtin functions for bit operations. (#496)
• Added support for raw string literals. (#485)

  `raw string`
  

• Fixed type checker panic on embedded pointer to struct field. (#500)
• Removed redundant fields from ast nodes. (#504) (#503)
• Improved Language Definition documentation.

Expr Editor

The Expr Editor is an embeddable code editor written in JavaScript with
full support of Expr language.

v1.15.7

Expr is a Go-centric expression language designed to deliver dynamic configurations with unparalleled accuracy, safety, and speed.

In this release:

• Fixed commutative property for comparison between a value and a pointer. (#490)
• Checker: forbid accessing built-ins and custom functions from $env. (#495)
• Enhanced the number parser to include support for parsing hexadecimal, binary, and octal literals. (#483)
• Added GetSource() method to vm.Program. (#491)

v1.15.6

• New module path expr-lang/epxr ⚠️
• Added expr.WithContext() option to pass context to custom functions.
• Added ast package comments.
• Hidden internal fields in vm.Program.

v1.15.5

• Added ceil(), floor() and round() function.
• Fixed type checker for float arguments.

v1.15.4

• Improved type checking for $env
• Added support for floats in sort() built-in
• Fixed: AST printing for ?? operator
• Fixed: only emit OpEqual{Int,String} for simple types
• Fixed: fetch without OpDeref (#467)
• Docs: categorize Language Definition functions (#452)
• Changed: ast.Node type now is not copied with ast.Patch

v1.15.3

• Added type checks to detect 42 in ["a"] as invalid.

v1.15.2

• Propagate uint32 func argument types in AST (#438)

v1.15.1

• Fixed type checker for the in operator.
• Fixed memory budget calculations for ranges.

v1.15.0

Expr is a Go-centric expression language designed to deliver dynamic configurations with unparalleled accuracy, safety, and speed.

In this release:

• Added support for variables.

  let foo = filter(tweets, .Text contains "foo");
  let name = foo?.Author?.Name ?? "unknown";
  upper(name)

• Added configuration to enable/disable builtin functions.
• Added a bunch of optimizations for builtin function combinations:
  • len(filter()) and map(filter())
  • filter()[0] and filter()[-1]
• Added a bunch of new builtin functions:
  • sort, sortBy
  • groupBy
  • toPairs, fromPairs
  • take, reduce, mean, median.
• Fixed in-range optimization to be only applied to integers.
• Fixed float folding optimization.
• Fixed duration*integer mutliplications.
• Improved language and developer documentation.

Examples:

tweets | filter(.Size < 280) | map(.Content) | join(" -- ")

filter(posts, {
    let span = now() - .CreatedAt;
    let limit = 7 * duration("24h");
    span >= limit
})

v1.14.3

• Fixed builtin type checks for any