Trait ExprExt

pub trait ExprExt {
    // Required method
    fn as_expr(&self) -> &Expr;

    // Provided methods
    fn is_immutable_value(&self) -> bool { ... }
    fn is_number(&self) -> bool { ... }
    fn is_str(&self) -> bool { ... }
    fn is_array_lit(&self) -> bool { ... }
    fn is_nan(&self) -> bool { ... }
    fn is_undefined(&self, ctx: &ExprCtx) -> bool { ... }
    fn is_void(&self) -> bool { ... }
    fn is_global_ref_to(&self, ctx: &ExprCtx, id: &str) -> bool { ... }
    fn is_one_of_global_ref_to(&self, ctx: &ExprCtx, ids: &[&str]) -> bool { ... }
    fn as_pure_bool(&self, ctx: &ExprCtx) -> Value<bool> { ... }
    fn cast_to_bool(&self, ctx: &ExprCtx) -> (Purity, Value<bool>) { ... }
    fn cast_to_number(&self, ctx: &ExprCtx) -> (Purity, Value<f64>) { ... }
    fn as_pure_number(&self, ctx: &ExprCtx) -> Value<f64> { ... }
    fn as_pure_string(&self, ctx: &ExprCtx) -> Value<Cow<'_, str>> { ... }
    fn get_type(&self) -> Value<Type> { ... }
    fn is_pure_callee(&self, ctx: &ExprCtx) -> bool { ... }
    fn may_have_side_effects(&self, ctx: &ExprCtx) -> bool { ... }
}

Available on crate features __ecma and __utils only.

Extension methods for Expr.

Required Methods

fn as_expr(&self) -> &Expr

Provided Methods

fn is_immutable_value(&self) -> bool

Returns true if this is an immutable value.

fn is_number(&self) -> bool

fn is_str(&self) -> bool

fn is_array_lit(&self) -> bool

fn is_nan(&self) -> bool

Checks if self is NaN.

fn is_undefined(&self, ctx: &ExprCtx) -> bool

fn is_void(&self) -> bool

fn is_global_ref_to(&self, ctx: &ExprCtx, id: &str) -> bool

Returns true if id references a global object.

fn is_one_of_global_ref_to(&self, ctx: &ExprCtx, ids: &[&str]) -> bool

Returns true if id references a global object.

fn as_pure_bool(&self, ctx: &ExprCtx) -> Value<bool>

Get bool value of self if it does not have any side effects.

fn cast_to_bool(&self, ctx: &ExprCtx) -> (Purity, Value<bool>)

This method emulates the Boolean() JavaScript cast function. Note: unlike getPureBooleanValue this function does not return None for expressions with side-effects.

fn cast_to_number(&self, ctx: &ExprCtx) -> (Purity, Value<f64>)

fn as_pure_number(&self, ctx: &ExprCtx) -> Value<f64>

Emulates javascript Number() cast function.

Note: This method returns Known only if it’s pure.

fn as_pure_string(&self, ctx: &ExprCtx) -> Value<Cow<'_, str>>

Returns Known only if it’s pure.

fn get_type(&self) -> Value<Type>

Apply the supplied predicate against all possible result Nodes of the expression.

fn is_pure_callee(&self, ctx: &ExprCtx) -> bool

fn may_have_side_effects(&self, ctx: &ExprCtx) -> bool

Implementations on Foreign Types

impl ExprExt for Box<Expr>

fn as_expr(&self) -> &Expr

Implementors

impl ExprExt for Expr