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Node

Enum Node 

Source
pub enum Node {
Show 59 variants Pipeline { name: String, params: Vec<String>, body: Vec<SNode>, extends: Option<String>, }, LetBinding { pattern: BindingPattern, type_ann: Option<TypeExpr>, value: Box<SNode>, }, VarBinding { pattern: BindingPattern, type_ann: Option<TypeExpr>, value: Box<SNode>, }, OverrideDecl { name: String, params: Vec<String>, body: Vec<SNode>, }, ImportDecl { path: String, }, SelectiveImport { names: Vec<String>, path: String, }, EnumDecl { name: String, variants: Vec<EnumVariant>, }, StructDecl { name: String, fields: Vec<StructField>, }, InterfaceDecl { name: String, methods: Vec<InterfaceMethod>, }, ImplBlock { type_name: String, methods: Vec<SNode>, }, IfElse { condition: Box<SNode>, then_body: Vec<SNode>, else_body: Option<Vec<SNode>>, }, ForIn { pattern: BindingPattern, iterable: Box<SNode>, body: Vec<SNode>, }, MatchExpr { value: Box<SNode>, arms: Vec<MatchArm>, }, WhileLoop { condition: Box<SNode>, body: Vec<SNode>, }, Retry { count: Box<SNode>, body: Vec<SNode>, }, ReturnStmt { value: Option<Box<SNode>>, }, TryCatch { body: Vec<SNode>, error_var: Option<String>, error_type: Option<TypeExpr>, catch_body: Vec<SNode>, finally_body: Option<Vec<SNode>>, }, FnDecl { name: String, type_params: Vec<TypeParam>, params: Vec<TypedParam>, return_type: Option<TypeExpr>, where_clauses: Vec<WhereClause>, body: Vec<SNode>, is_pub: bool, }, TypeDecl { name: String, type_expr: TypeExpr, }, SpawnExpr { body: Vec<SNode>, }, DurationLiteral(u64), RangeExpr { start: Box<SNode>, end: Box<SNode>, inclusive: bool, }, GuardStmt { condition: Box<SNode>, else_body: Vec<SNode>, }, AskExpr { fields: Vec<DictEntry>, }, DeadlineBlock { duration: Box<SNode>, body: Vec<SNode>, }, YieldExpr { value: Option<Box<SNode>>, }, MutexBlock { body: Vec<SNode>, }, BreakStmt, ContinueStmt, Parallel { count: Box<SNode>, variable: Option<String>, body: Vec<SNode>, }, ParallelMap { list: Box<SNode>, variable: String, body: Vec<SNode>, }, SelectExpr { cases: Vec<SelectCase>, timeout: Option<(Box<SNode>, Vec<SNode>)>, default_body: Option<Vec<SNode>>, }, FunctionCall { name: String, args: Vec<SNode>, }, MethodCall { object: Box<SNode>, method: String, args: Vec<SNode>, }, OptionalMethodCall { object: Box<SNode>, method: String, args: Vec<SNode>, }, PropertyAccess { object: Box<SNode>, property: String, }, OptionalPropertyAccess { object: Box<SNode>, property: String, }, SubscriptAccess { object: Box<SNode>, index: Box<SNode>, }, SliceAccess { object: Box<SNode>, start: Option<Box<SNode>>, end: Option<Box<SNode>>, }, BinaryOp { op: String, left: Box<SNode>, right: Box<SNode>, }, UnaryOp { op: String, operand: Box<SNode>, }, Ternary { condition: Box<SNode>, true_expr: Box<SNode>, false_expr: Box<SNode>, }, Assignment { target: Box<SNode>, value: Box<SNode>, op: Option<String>, }, ThrowStmt { value: Box<SNode>, }, EnumConstruct { enum_name: String, variant: String, args: Vec<SNode>, }, StructConstruct { struct_name: String, fields: Vec<DictEntry>, }, InterpolatedString(Vec<StringSegment>), StringLiteral(String), IntLiteral(i64), FloatLiteral(f64), BoolLiteral(bool), NilLiteral, Identifier(String), ListLiteral(Vec<SNode>), DictLiteral(Vec<DictEntry>), Spread(Box<SNode>), TryOperator { operand: Box<SNode>, }, Block(Vec<SNode>), Closure { params: Vec<TypedParam>, body: Vec<SNode>, },
}
Expand description

AST nodes for the Harn language.

Variants§

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Pipeline

Fields

§name: String
§params: Vec<String>
§body: Vec<SNode>
§extends: Option<String>
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LetBinding

Fields

§type_ann: Option<TypeExpr>
§value: Box<SNode>
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VarBinding

Fields

§type_ann: Option<TypeExpr>
§value: Box<SNode>
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OverrideDecl

Fields

§name: String
§params: Vec<String>
§body: Vec<SNode>
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ImportDecl

Fields

§path: String
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SelectiveImport

Selective import: import { foo, bar } from “module”

Fields

§names: Vec<String>
§path: String
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EnumDecl

Fields

§name: String
§variants: Vec<EnumVariant>
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StructDecl

Fields

§name: String
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InterfaceDecl

Fields

§name: String
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ImplBlock

Impl block: impl TypeName { fn method(self, …) { … } … }

Fields

§type_name: String
§methods: Vec<SNode>
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IfElse

Fields

§condition: Box<SNode>
§then_body: Vec<SNode>
§else_body: Option<Vec<SNode>>
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ForIn

Fields

§iterable: Box<SNode>
§body: Vec<SNode>
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MatchExpr

Fields

§value: Box<SNode>
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WhileLoop

Fields

§condition: Box<SNode>
§body: Vec<SNode>
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Retry

Fields

§count: Box<SNode>
§body: Vec<SNode>
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ReturnStmt

Fields

§value: Option<Box<SNode>>
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TryCatch

Fields

§body: Vec<SNode>
§error_var: Option<String>
§error_type: Option<TypeExpr>
§catch_body: Vec<SNode>
§finally_body: Option<Vec<SNode>>
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FnDecl

Fields

§name: String
§type_params: Vec<TypeParam>
§params: Vec<TypedParam>
§return_type: Option<TypeExpr>
§where_clauses: Vec<WhereClause>
§body: Vec<SNode>
§is_pub: bool
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TypeDecl

Fields

§name: String
§type_expr: TypeExpr
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SpawnExpr

Fields

§body: Vec<SNode>
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DurationLiteral(u64)

Duration literal: 500ms, 5s, 30m, 2h

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RangeExpr

Range expression: start upto end (exclusive) or start thru end (inclusive)

Fields

§start: Box<SNode>
§end: Box<SNode>
§inclusive: bool
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GuardStmt

Guard clause: guard condition else { body }

Fields

§condition: Box<SNode>
§else_body: Vec<SNode>
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AskExpr

Ask expression: ask { system: “…”, user: “…”, … }

Fields

§fields: Vec<DictEntry>
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DeadlineBlock

Deadline block: deadline DURATION { body }

Fields

§duration: Box<SNode>
§body: Vec<SNode>
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YieldExpr

Yield expression: yields control to host, optionally with a value.

Fields

§value: Option<Box<SNode>>
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MutexBlock

Mutex block: mutual exclusion for concurrent access.

Fields

§body: Vec<SNode>
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BreakStmt

Break out of a loop.

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ContinueStmt

Continue to next loop iteration.

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Parallel

Fields

§count: Box<SNode>
§variable: Option<String>
§body: Vec<SNode>
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ParallelMap

Fields

§list: Box<SNode>
§variable: String
§body: Vec<SNode>
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SelectExpr

Fields

§timeout: Option<(Box<SNode>, Vec<SNode>)>
§default_body: Option<Vec<SNode>>
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FunctionCall

Fields

§name: String
§args: Vec<SNode>
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MethodCall

Fields

§object: Box<SNode>
§method: String
§args: Vec<SNode>
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OptionalMethodCall

Optional method call: obj?.method(args) — returns nil if obj is nil.

Fields

§object: Box<SNode>
§method: String
§args: Vec<SNode>
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PropertyAccess

Fields

§object: Box<SNode>
§property: String
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OptionalPropertyAccess

Optional chaining: obj?.property — returns nil if obj is nil.

Fields

§object: Box<SNode>
§property: String
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SubscriptAccess

Fields

§object: Box<SNode>
§index: Box<SNode>
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SliceAccess

Fields

§object: Box<SNode>
§start: Option<Box<SNode>>
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BinaryOp

Fields

§left: Box<SNode>
§right: Box<SNode>
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UnaryOp

Fields

§operand: Box<SNode>
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Ternary

Fields

§condition: Box<SNode>
§true_expr: Box<SNode>
§false_expr: Box<SNode>
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Assignment

Fields

§target: Box<SNode>
§value: Box<SNode>
§op: Option<String>

None = plain =, Some(“+”) = +=, etc.

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ThrowStmt

Fields

§value: Box<SNode>
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EnumConstruct

Enum variant construction: EnumName.Variant(args)

Fields

§enum_name: String
§variant: String
§args: Vec<SNode>
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StructConstruct

Struct construction: StructName { field: value, … }

Fields

§struct_name: String
§fields: Vec<DictEntry>
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InterpolatedString(Vec<StringSegment>)

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StringLiteral(String)

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IntLiteral(i64)

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FloatLiteral(f64)

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BoolLiteral(bool)

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NilLiteral

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Identifier(String)

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ListLiteral(Vec<SNode>)

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DictLiteral(Vec<DictEntry>)

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Spread(Box<SNode>)

Spread expression ...expr inside list/dict literals.

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TryOperator

Try operator: expr? — unwraps Result.Ok or propagates Result.Err.

Fields

§operand: Box<SNode>
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Block(Vec<SNode>)

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Closure

Fields

§params: Vec<TypedParam>
§body: Vec<SNode>

Trait Implementations§

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impl Clone for Node

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fn clone(&self) -> Node

Returns a duplicate of the value. Read more
1.0.0 · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Node

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for Node

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fn eq(&self, other: &Node) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for Node

Auto Trait Implementations§

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impl Freeze for Node

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impl RefUnwindSafe for Node

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impl Send for Node

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impl Sync for Node

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impl Unpin for Node

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impl UnsafeUnpin for Node

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impl UnwindSafe for Node

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.