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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| use crate::{ | ||
| exec::Executable, | ||
| gc::{Finalize, Trace}, | ||
| syntax::ast::node::{join_nodes, FormalParameter, Node, StatementList}, | ||
| BoaProfiler, Context, JsResult, JsValue, | ||
| }; | ||
| use std::fmt; | ||
|
|
||
| #[cfg(feature = "deser")] | ||
| use serde::{Deserialize, Serialize}; | ||
|
|
||
| /// The `function*` declaration (`function` keyword followed by an asterisk) defines a generator function, | ||
| /// which returns a `Generator` object. | ||
| /// | ||
| /// More information: | ||
| /// - [ECMAScript reference][spec] | ||
| /// - [MDN documentation][mdn] | ||
| /// | ||
| /// [spec]: https://tc39.es/ecma262/#prod-GeneratorDeclaration | ||
| /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/function* | ||
| #[cfg_attr(feature = "deser", derive(Serialize, Deserialize))] | ||
| #[derive(Clone, Debug, Trace, Finalize, PartialEq)] | ||
| pub struct GeneratorDecl { | ||
| name: Box<str>, | ||
| parameters: Box<[FormalParameter]>, | ||
| body: StatementList, | ||
| } | ||
|
|
||
| impl GeneratorDecl { | ||
| /// Creates a new generator declaration. | ||
| pub(in crate::syntax) fn new<N, P, B>(name: N, parameters: P, body: B) -> Self | ||
| where | ||
| N: Into<Box<str>>, | ||
| P: Into<Box<[FormalParameter]>>, | ||
| B: Into<StatementList>, | ||
| { | ||
| Self { | ||
| name: name.into(), | ||
| parameters: parameters.into(), | ||
| body: body.into(), | ||
| } | ||
| } | ||
|
|
||
| /// Gets the name of the generator declaration. | ||
| pub fn name(&self) -> &str { | ||
| &self.name | ||
| } | ||
|
|
||
| /// Gets the list of parameters of the generator declaration. | ||
| pub fn parameters(&self) -> &[FormalParameter] { | ||
| &self.parameters | ||
| } | ||
|
|
||
| /// Gets the body of the generator declaration. | ||
| pub fn body(&self) -> &[Node] { | ||
| self.body.items() | ||
| } | ||
|
|
||
| /// Implements the display formatting with indentation. | ||
| pub(in crate::syntax::ast::node) fn display( | ||
| &self, | ||
| f: &mut fmt::Formatter<'_>, | ||
| indentation: usize, | ||
| ) -> fmt::Result { | ||
| write!(f, "function* {}(", self.name)?; | ||
| join_nodes(f, &self.parameters)?; | ||
| if self.body().is_empty() { | ||
| f.write_str(") {}") | ||
| } else { | ||
| f.write_str(") {\n")?; | ||
| self.body.display(f, indentation + 1)?; | ||
| write!(f, "{}}}", " ".repeat(indentation)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Executable for GeneratorDecl { | ||
| fn run(&self, _context: &mut Context) -> JsResult<JsValue> { | ||
| let _timer = BoaProfiler::global().start_event("GeneratorDecl", "exec"); | ||
| // TODO: Implement GeneratorFunction | ||
| // https://tc39.es/ecma262/#sec-generatorfunction-objects | ||
| Ok(JsValue::undefined()) | ||
| } | ||
| } | ||
|
|
||
| impl From<GeneratorDecl> for Node { | ||
| fn from(decl: GeneratorDecl) -> Self { | ||
| Self::GeneratorDecl(decl) | ||
| } | ||
| } | ||
|
|
||
| impl fmt::Display for GeneratorDecl { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| self.display(f, 0) | ||
| } | ||
| } |
109 changes: 109 additions & 0 deletions
109
boa/src/syntax/ast/node/declaration/generator_expr/mod.rs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| use crate::{ | ||
| exec::Executable, | ||
| gc::{Finalize, Trace}, | ||
| syntax::ast::node::{join_nodes, FormalParameter, Node, StatementList}, | ||
| Context, JsResult, JsValue, | ||
| }; | ||
| use std::fmt; | ||
|
|
||
| #[cfg(feature = "deser")] | ||
| use serde::{Deserialize, Serialize}; | ||
|
|
||
| /// The `function*` keyword can be used to define a generator function inside an expression. | ||
| /// | ||
| /// More information: | ||
| /// - [ECMAScript reference][spec] | ||
| /// - [MDN documentation][mdn] | ||
| /// | ||
| /// [spec]: https://tc39.es/ecma262/#prod-GeneratorExpression | ||
| /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/function* | ||
| #[cfg_attr(feature = "deser", derive(Serialize, Deserialize))] | ||
| #[derive(Clone, Debug, Trace, Finalize, PartialEq)] | ||
| pub struct GeneratorExpr { | ||
| name: Option<Box<str>>, | ||
| parameters: Box<[FormalParameter]>, | ||
| body: StatementList, | ||
| } | ||
|
|
||
| impl GeneratorExpr { | ||
| /// Creates a new generator expression | ||
| pub(in crate::syntax) fn new<N, P, B>(name: N, parameters: P, body: B) -> Self | ||
| where | ||
| N: Into<Option<Box<str>>>, | ||
| P: Into<Box<[FormalParameter]>>, | ||
| B: Into<StatementList>, | ||
| { | ||
| Self { | ||
| name: name.into(), | ||
| parameters: parameters.into(), | ||
| body: body.into(), | ||
| } | ||
| } | ||
|
|
||
| /// Gets the name of the generator declaration. | ||
| pub fn name(&self) -> Option<&str> { | ||
| self.name.as_ref().map(Box::as_ref) | ||
| } | ||
|
|
||
| /// Gets the list of parameters of the generator declaration. | ||
| pub fn parameters(&self) -> &[FormalParameter] { | ||
| &self.parameters | ||
| } | ||
|
|
||
| /// Gets the body of the generator declaration. | ||
| pub fn body(&self) -> &StatementList { | ||
| &self.body | ||
| } | ||
|
|
||
| /// Implements the display formatting with indentation. | ||
| pub(in crate::syntax::ast::node) fn display( | ||
| &self, | ||
| f: &mut fmt::Formatter<'_>, | ||
| indentation: usize, | ||
| ) -> fmt::Result { | ||
| f.write_str("function*")?; | ||
| if let Some(ref name) = self.name { | ||
| write!(f, " {}", name)?; | ||
| } | ||
| f.write_str("(")?; | ||
| join_nodes(f, &self.parameters)?; | ||
| f.write_str(") ")?; | ||
| self.display_block(f, indentation) | ||
| } | ||
|
|
||
| /// Displays the generator's body. This includes the curly braces at the start and end. | ||
| /// This will not indent the first brace, but will indent the last brace. | ||
| pub(in crate::syntax::ast::node) fn display_block( | ||
| &self, | ||
| f: &mut fmt::Formatter<'_>, | ||
| indentation: usize, | ||
| ) -> fmt::Result { | ||
| if self.body().items().is_empty() { | ||
| f.write_str("{}") | ||
| } else { | ||
| f.write_str("{\n")?; | ||
| self.body.display(f, indentation + 1)?; | ||
| write!(f, "{}}}", " ".repeat(indentation)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Executable for GeneratorExpr { | ||
| fn run(&self, _context: &mut Context) -> JsResult<JsValue> { | ||
| // TODO: Implement GeneratorFunction | ||
| // https://tc39.es/ecma262/#sec-generatorfunction-objects | ||
| Ok(JsValue::undefined()) | ||
| } | ||
| } | ||
|
|
||
| impl fmt::Display for GeneratorExpr { | ||
| fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { | ||
| self.display(f, 0) | ||
| } | ||
| } | ||
|
|
||
| impl From<GeneratorExpr> for Node { | ||
| fn from(expr: GeneratorExpr) -> Self { | ||
| Self::GeneratorExpr(expr) | ||
| } | ||
| } |
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