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Copy pathast.rs
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1422 lines (1297 loc) · 38.7 KB
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use crate::node::Node;
use fe_common::{Span, Spanned};
use indenter::indented;
use serde::{Deserialize, Serialize};
pub use smol_str::SmolStr;
use std::{
fmt,
fmt::{Formatter, Write},
};
use vec1::Vec1;
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Module {
pub body: Vec<ModuleStmt>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum ModuleStmt {
Pragma(Node<Pragma>),
Use(Node<Use>),
TypeAlias(Node<TypeAlias>),
Contract(Node<Contract>),
Constant(Node<ConstantDecl>),
Struct(Node<Struct>),
Enum(Node<Enum>),
Trait(Node<Trait>),
Impl(Node<Impl>),
Function(Node<Function>),
Attribute(Node<SmolStr>),
ParseError(Span),
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Pragma {
pub version_requirement: Node<SmolStr>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Path {
pub segments: Vec<Node<SmolStr>>,
}
impl Path {
pub fn remove_last(&self) -> Path {
Path {
segments: self.segments[0..self.segments.len() - 1].to_vec(),
}
}
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Use {
pub tree: Node<UseTree>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum UseTree {
Glob {
prefix: Path,
},
Nested {
prefix: Path,
children: Vec<Node<UseTree>>,
},
Simple {
path: Path,
rename: Option<Node<SmolStr>>,
},
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct ConstantDecl {
pub name: Node<SmolStr>,
pub typ: Node<TypeDesc>,
pub value: Node<Expr>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct TypeAlias {
pub name: Node<SmolStr>,
pub typ: Node<TypeDesc>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Contract {
pub name: Node<SmolStr>,
pub fields: Vec<Node<Field>>,
pub body: Vec<ContractStmt>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Struct {
pub name: Node<SmolStr>,
pub fields: Vec<Node<Field>>,
pub functions: Vec<Node<Function>>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Enum {
pub name: Node<SmolStr>,
pub variants: Vec<Node<Variant>>,
pub functions: Vec<Node<Function>>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Trait {
pub name: Node<SmolStr>,
pub functions: Vec<Node<FunctionSignature>>,
pub pub_qual: Option<Span>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Impl {
pub impl_trait: Node<SmolStr>,
pub receiver: Node<TypeDesc>,
pub functions: Vec<Node<Function>>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum TypeDesc {
Unit,
// TODO: replace with `Name(SmolStr)`, or eliminate in favor of `Path`?
Base {
base: SmolStr,
},
Path(Path),
Tuple {
items: Vec1<Node<TypeDesc>>,
},
Generic {
// TODO: when we support user-defined generic types,
// this will have to be a `Path`
base: Node<SmolStr>,
args: Node<Vec<GenericArg>>,
},
SelfType,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum GenericArg {
TypeDesc(Node<TypeDesc>),
Int(Node<usize>),
ConstExpr(Node<Expr>),
}
impl Spanned for GenericArg {
fn span(&self) -> Span {
match self {
GenericArg::TypeDesc(node) => node.span,
GenericArg::Int(node) => node.span,
GenericArg::ConstExpr(node) => node.span,
}
}
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum GenericParameter {
Unbounded(Node<SmolStr>),
Bounded {
name: Node<SmolStr>,
bound: Node<TypeDesc>,
},
}
impl GenericParameter {
pub fn name(&self) -> SmolStr {
self.name_node().kind
}
pub fn name_node(&self) -> Node<SmolStr> {
match self {
GenericParameter::Unbounded(node) => node.clone(),
GenericParameter::Bounded { name, .. } => name.clone(),
}
}
}
impl Spanned for GenericParameter {
fn span(&self) -> Span {
match self {
GenericParameter::Unbounded(node) => node.span,
GenericParameter::Bounded { name, bound } => name.span + bound.span,
}
}
}
/// struct or contract field, with optional 'pub' and 'const' qualifiers
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Field {
pub is_pub: bool,
pub is_const: bool,
pub attributes: Vec<Node<SmolStr>>,
pub name: Node<SmolStr>,
pub typ: Node<TypeDesc>,
pub value: Option<Node<Expr>>,
}
/// Enum variant definition.
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Variant {
pub name: Node<SmolStr>,
pub kind: VariantKind,
}
/// Enum variant kind.
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum VariantKind {
/// Unit variant.
/// E.g., `Bar` in
///
/// ```fe
/// enum Foo {
/// Bar
/// Baz(u32, i32)
/// }
/// ```
Unit,
/// Tuple variant.
/// E.g., `Baz(u32, i32)` in
///
/// ```fe
/// enum Foo {
/// Bar
/// Baz(u32, i32)
/// }
/// ```
Tuple(Vec<Node<TypeDesc>>),
}
#[allow(clippy::large_enum_variant)]
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum ContractStmt {
Function(Node<Function>),
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct FunctionSignature {
// qualifier order: `pub unsafe fn`
pub pub_: Option<Span>,
pub unsafe_: Option<Span>,
pub name: Node<SmolStr>,
pub generic_params: Node<Vec<GenericParameter>>,
pub args: Vec<Node<FunctionArg>>,
pub return_type: Option<Node<TypeDesc>>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct Function {
pub sig: Node<FunctionSignature>,
pub body: Vec<Node<FuncStmt>>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
#[allow(clippy::large_enum_variant)]
pub enum FunctionArg {
Regular {
mut_: Option<Span>,
label: Option<Node<SmolStr>>,
name: Node<SmolStr>,
typ: Node<TypeDesc>,
},
Self_ {
mut_: Option<Span>,
},
}
impl FunctionArg {
pub fn label_span(&self) -> Option<Span> {
match self {
Self::Regular { label, .. } => label.as_ref().map(|label| label.span),
Self::Self_ { .. } => None,
}
}
pub fn name_span(&self) -> Option<Span> {
match self {
Self::Regular { name, .. } => Some(name.span),
Self::Self_ { .. } => None,
}
}
pub fn typ_span(&self) -> Option<Span> {
match self {
Self::Regular { typ, .. } => Some(typ.span),
Self::Self_ { .. } => None,
}
}
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum FuncStmt {
Return {
value: Option<Node<Expr>>,
},
VarDecl {
mut_: Option<Span>,
target: Node<VarDeclTarget>,
typ: Node<TypeDesc>,
value: Option<Node<Expr>>,
},
ConstantDecl {
name: Node<SmolStr>,
typ: Node<TypeDesc>,
value: Node<Expr>,
},
Assign {
target: Node<Expr>,
value: Node<Expr>,
},
AugAssign {
target: Node<Expr>,
op: Node<BinOperator>,
value: Node<Expr>,
},
For {
target: Node<SmolStr>,
iter: Node<Expr>,
body: Vec<Node<FuncStmt>>,
},
While {
test: Node<Expr>,
body: Vec<Node<FuncStmt>>,
},
If {
test: Node<Expr>,
body: Vec<Node<FuncStmt>>,
or_else: Vec<Node<FuncStmt>>,
},
Match {
expr: Node<Expr>,
arms: Vec<Node<MatchArm>>,
},
Assert {
test: Node<Expr>,
msg: Option<Node<Expr>>,
},
Expr {
value: Node<Expr>,
},
Break,
Continue,
Revert {
error: Option<Node<Expr>>,
},
Unsafe(Vec<Node<FuncStmt>>),
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct MatchArm {
pub pat: Node<Pattern>,
pub body: Vec<Node<FuncStmt>>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum Pattern {
/// Represents a wildcard pattern `_`.
WildCard,
/// Rest pattern. e.g., `..`
Rest,
/// Represents a literal pattern. e.g., `true`.
Literal(Node<LiteralPattern>),
/// Represents tuple destructuring pattern. e.g., `(x, y, z)`.
Tuple(Vec<Node<Pattern>>),
/// Represents unit variant pattern. e.g., `Enum::Unit`.
Path(Node<Path>),
/// Represents tuple variant pattern. e.g., `Enum::Tuple(x, y, z)`.
PathTuple(Node<Path>, Vec<Node<Pattern>>),
/// Represents struct or struct variant destructuring pattern. e.g.,
/// `MyStruct {x: pat1, y: pat2}}`.
PathStruct {
path: Node<Path>,
fields: Vec<(Node<SmolStr>, Node<Pattern>)>,
has_rest: bool,
},
/// Represents or pattern. e.g., `EnumUnit | EnumTuple(_, _, _)`
Or(Vec<Node<Pattern>>),
}
impl Pattern {
pub fn is_rest(&self) -> bool {
matches!(self, Pattern::Rest)
}
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone, Copy)]
pub enum LiteralPattern {
Bool(bool),
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum VarDeclTarget {
Name(SmolStr),
Tuple(Vec<Node<VarDeclTarget>>),
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub enum Expr {
Ternary {
if_expr: Box<Node<Expr>>,
test: Box<Node<Expr>>,
else_expr: Box<Node<Expr>>,
},
BoolOperation {
left: Box<Node<Expr>>,
op: Node<BoolOperator>,
right: Box<Node<Expr>>,
},
BinOperation {
left: Box<Node<Expr>>,
op: Node<BinOperator>,
right: Box<Node<Expr>>,
},
UnaryOperation {
op: Node<UnaryOperator>,
operand: Box<Node<Expr>>,
},
CompOperation {
left: Box<Node<Expr>>,
op: Node<CompOperator>,
right: Box<Node<Expr>>,
},
Attribute {
value: Box<Node<Expr>>,
attr: Node<SmolStr>,
},
Subscript {
value: Box<Node<Expr>>,
index: Box<Node<Expr>>,
},
Call {
func: Box<Node<Expr>>,
generic_args: Option<Node<Vec<GenericArg>>>,
args: Node<Vec<Node<CallArg>>>,
},
List {
elts: Vec<Node<Expr>>,
},
Repeat {
value: Box<Node<Expr>>,
len: Box<Node<GenericArg>>,
},
Tuple {
elts: Vec<Node<Expr>>,
},
Bool(bool),
Name(SmolStr),
Path(Path),
Num(SmolStr),
Str(SmolStr),
Unit,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone)]
pub struct CallArg {
pub label: Option<Node<SmolStr>>,
pub value: Node<Expr>,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone, Copy)]
pub enum BoolOperator {
And,
Or,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone, Copy)]
pub enum BinOperator {
Add,
Sub,
Mult,
Div,
Mod,
Pow,
LShift,
RShift,
BitOr,
BitXor,
BitAnd,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone, Copy)]
pub enum UnaryOperator {
Invert,
Not,
USub,
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Hash, Clone, Copy)]
pub enum CompOperator {
Eq,
NotEq,
Lt,
LtE,
Gt,
GtE,
}
impl Node<Contract> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Struct> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Enum> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Variant> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Trait> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Field> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Node<Function> {
pub fn name(&self) -> &str {
&self.kind.sig.kind.name.kind
}
}
impl Node<FunctionArg> {
pub fn name(&self) -> &str {
match &self.kind {
FunctionArg::Regular { name, .. } => &name.kind,
FunctionArg::Self_ { .. } => "self",
}
}
pub fn name_span(&self) -> Span {
match &self.kind {
FunctionArg::Regular { name, .. } => name.span,
FunctionArg::Self_ { .. } => self.span,
}
}
}
impl Node<TypeAlias> {
pub fn name(&self) -> &str {
&self.kind.name.kind
}
}
impl Spanned for ModuleStmt {
fn span(&self) -> Span {
match self {
ModuleStmt::Pragma(inner) => inner.span,
ModuleStmt::Use(inner) => inner.span,
ModuleStmt::Trait(inner) => inner.span,
ModuleStmt::Impl(inner) => inner.span,
ModuleStmt::TypeAlias(inner) => inner.span,
ModuleStmt::Contract(inner) => inner.span,
ModuleStmt::Constant(inner) => inner.span,
ModuleStmt::Struct(inner) => inner.span,
ModuleStmt::Enum(inner) => inner.span,
ModuleStmt::Function(inner) => inner.span,
ModuleStmt::Attribute(inner) => inner.span,
ModuleStmt::ParseError(span) => *span,
}
}
}
impl Spanned for ContractStmt {
fn span(&self) -> Span {
match self {
ContractStmt::Function(inner) => inner.span,
}
}
}
impl fmt::Display for Module {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let (uses, rest): (Vec<&ModuleStmt>, Vec<&ModuleStmt>) = self
.body
.iter()
.partition(|&stmt| matches!(stmt, ModuleStmt::Use(_) | ModuleStmt::Pragma(_)));
for stmt in &uses {
writeln!(f, "{stmt}")?;
}
if !uses.is_empty() && !rest.is_empty() {
writeln!(f)?;
}
let mut delim = "";
for stmt in rest {
writeln!(f, "{delim}{stmt}")?;
delim = "\n";
}
Ok(())
}
}
impl fmt::Display for ModuleStmt {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
ModuleStmt::Pragma(node) => write!(f, "{}", node.kind),
ModuleStmt::Use(node) => write!(f, "{}", node.kind),
ModuleStmt::Trait(node) => write!(f, "{}", node.kind),
ModuleStmt::Impl(node) => write!(f, "{}", node.kind),
ModuleStmt::TypeAlias(node) => write!(f, "{}", node.kind),
ModuleStmt::Contract(node) => write!(f, "{}", node.kind),
ModuleStmt::Constant(node) => write!(f, "{}", node.kind),
ModuleStmt::Struct(node) => write!(f, "{}", node.kind),
ModuleStmt::Enum(node) => write!(f, "{}", node.kind),
ModuleStmt::Function(node) => write!(f, "{}", node.kind),
ModuleStmt::Attribute(node) => writeln!(f, "#{}", node.kind),
ModuleStmt::ParseError(span) => {
write!(f, "# PARSE ERROR: {}..{}", span.start, span.end)
}
}
}
}
impl fmt::Display for Pragma {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "pragma {}", self.version_requirement.kind)
}
}
impl fmt::Display for Use {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
// TODO pub use
write!(f, "use {}", self.tree.kind)
}
}
impl fmt::Display for UseTree {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
UseTree::Glob { prefix } => write!(f, "{prefix}::*"),
UseTree::Simple { path, rename } => {
if let Some(rename) = rename {
write!(f, "{} as {}", path, rename.kind)
} else {
write!(f, "{path}")
}
}
UseTree::Nested { prefix, children } => {
write!(f, "{}::{{{}}}", prefix, node_comma_joined(children))
}
}
}
}
impl fmt::Display for Path {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let joined_names = self
.segments
.iter()
.map(|name| name.kind.as_ref())
.collect::<Vec<_>>()
.join("::");
write!(f, "{joined_names}")?;
Ok(())
}
}
impl fmt::Display for ConstantDecl {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let ConstantDecl {
name,
typ,
value,
pub_qual,
} = self;
if pub_qual.is_some() {
write!(f, "pub ")?;
}
write!(f, "const {}: {} = {}", name.kind, typ.kind, value.kind)
}
}
impl fmt::Display for Trait {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
writeln!(f, "trait {}:", self.name.kind)?;
Ok(())
}
}
impl fmt::Display for Impl {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
writeln!(
f,
"impl {} for {}",
self.impl_trait.kind, self.receiver.kind
)?;
Ok(())
}
}
impl fmt::Display for TypeAlias {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let TypeAlias {
name,
typ,
pub_qual,
} = self;
if pub_qual.is_some() {
write!(f, "pub ")?;
}
write!(f, "type {} = {}", name.kind, typ.kind)
}
}
impl fmt::Display for Contract {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let Contract {
name,
fields,
body,
pub_qual,
} = self;
if pub_qual.is_some() {
write!(f, "pub ")?;
}
write!(f, "contract {} {{", name.kind)?;
if !fields.is_empty() {
for field in fields {
writeln!(f)?;
write!(indented(f), "{}", field.kind)?;
}
writeln!(f)?;
}
if !body.is_empty() {
writeln!(f)?;
write!(indented(f), "{}", double_line_joined(body))?;
writeln!(f)?;
}
write!(f, "}}")
}
}
impl fmt::Display for Struct {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let Struct {
name,
fields,
functions,
pub_qual,
} = self;
if pub_qual.is_some() {
write!(f, "pub ")?;
}
write!(f, "struct {} ", name.kind)?;
write!(f, "{{")?;
write_nodes_line_wrapped(&mut indented(f), fields)?;
if !self.fields.is_empty() && !functions.is_empty() {
writeln!(f)?;
}
if !functions.is_empty() {
writeln!(indented(f), "{}", double_line_joined(functions))?;
}
write!(f, "}}")
}
}
impl fmt::Display for Enum {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let Enum {
name,
variants,
functions,
pub_qual,
} = self;
if pub_qual.is_some() {
write!(f, "pub ")?;
}
write!(f, "enum {} ", name.kind)?;
write!(f, "{{")?;
write_nodes_line_wrapped(&mut indented(f), variants)?;
if !functions.is_empty() {
writeln!(indented(f), "{}", double_line_joined(functions))?;
}
write!(f, "}}")
}
}
impl fmt::Display for TypeDesc {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
TypeDesc::Unit => write!(f, "()"),
TypeDesc::Base { base } => write!(f, "{base}"),
TypeDesc::Path(path) => write!(f, "{path}"),
TypeDesc::Tuple { items } => {
if items.len() == 1 {
write!(f, "({},)", items[0].kind)
} else {
write!(f, "({})", node_comma_joined(items))
}
}
TypeDesc::Generic { base, args } => {
write!(f, "{}<{}>", base.kind, comma_joined(args.kind.iter()))
}
TypeDesc::SelfType => write!(f, "Self"),
}
}
}
impl fmt::Display for GenericParameter {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
GenericParameter::Unbounded(name) => write!(f, "{}", name.kind),
GenericParameter::Bounded { name, bound } => write!(f, "{}: {}", name.kind, bound.kind),
}
}
}
impl fmt::Display for GenericArg {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
GenericArg::TypeDesc(node) => write!(f, "{}", node.kind),
GenericArg::Int(node) => write!(f, "{}", node.kind),
GenericArg::ConstExpr(node) => write!(f, "{{ {} }}", node.kind),
}
}
}
impl fmt::Display for Field {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
if self.is_pub {
write!(f, "pub ")?;
}
if self.is_const {
write!(f, "const ")?;
}
write!(f, "{}: {}", self.name.kind, self.typ.kind)
}
}
impl fmt::Display for Variant {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.name.kind)?;
match &self.kind {
VariantKind::Unit => Ok(()),
VariantKind::Tuple(elts) => {
write!(f, "({})", node_comma_joined(elts))
}
}
}
}
impl fmt::Display for ContractStmt {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
ContractStmt::Function(node) => write!(f, "{}", node.kind),
}
}
}
impl fmt::Display for Node<Function> {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
self.kind.fmt(f)
}
}
impl fmt::Display for Function {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
let FunctionSignature {
pub_,
unsafe_,
name,
generic_params,
args,
return_type,
} = &self.sig.kind;
if pub_.is_some() {
write!(f, "pub ")?;
}
if unsafe_.is_some() {
write!(f, "unsafe ")?;
}
write!(f, "fn {}", name.kind)?;
if !generic_params.kind.is_empty() {
write!(f, "<{}>", comma_joined(generic_params.kind.iter()))?;
}
write!(f, "({})", node_comma_joined(args))?;
if let Some(return_type) = return_type.as_ref() {
write!(f, " -> {}", return_type.kind)?;
}
write!(f, " {{")?;
write_nodes_line_wrapped(&mut indented(f), &self.body)?;
write!(f, "}}")
}
}
impl fmt::Display for FunctionArg {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
FunctionArg::Regular {
mut_,
label,
name,
typ,
} => {
if mut_.is_some() {
write!(f, "mut ")?
}
if let Some(label) = label {
write!(f, "{} ", label.kind)?
}
write!(f, "{}: {}", name.kind, typ.kind)
}
FunctionArg::Self_ { mut_ } => {
if mut_.is_some() {
write!(f, "mut ")?;
}
write!(f, "self")
}
}
}
}
impl fmt::Display for FuncStmt {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match self {
FuncStmt::Return { value } => {
if let Some(value) = value {
write!(f, "return {}", value.kind)
} else {
write!(f, "return")
}
}
FuncStmt::VarDecl {
mut_,
target,
typ,
value,
} => {
let mut_ = if mut_.is_some() { "mut " } else { "" };
if let Some(value) = value {
write!(
f,
"let {}{}: {} = {}",
mut_, target.kind, typ.kind, value.kind
)
} else {
write!(f, "let {}{}: {}", mut_, target.kind, typ.kind)
}
}
FuncStmt::ConstantDecl { name, typ, value } => {
write!(f, "const {}: {} = {}", name.kind, typ.kind, value.kind)
}
FuncStmt::Assign { target, value } => write!(f, "{} = {}", target.kind, value.kind),
FuncStmt::AugAssign { target, op, value } => {
write!(f, "{} {}= {}", target.kind, op.kind, value.kind)
}
FuncStmt::For { target, iter, body } => {
write!(f, "for {} in {} {{", target.kind, iter.kind)?;
write_nodes_line_wrapped(&mut indented(f), body)?;
write!(f, "}}")
}
FuncStmt::While { test, body } => {
write!(f, "while {} {{", test.kind)?;
write_nodes_line_wrapped(&mut indented(f), body)?;
write!(f, "}}")
}
FuncStmt::If {
test,
body,
or_else,
} => {
write!(f, "if {} {{", test.kind)?;
write_nodes_line_wrapped(&mut indented(f), body)?;
if or_else.is_empty() {
write!(f, "}}")