sway-core 0.71.0

Sway core language.
Documentation 
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use std::fmt;

use crate::{
    decl_engine::DeclEngine,
    engine_threading::*,
    language::{
        parsed::*,
        ty::{self, EnumDecl, StructDecl, TyDecl},
        Visibility,
    },
    TypeId,
};
use sway_error::handler::{ErrorEmitted, Handler};

#[derive(Clone, Debug)]
pub enum ResolvedDeclaration {
    Parsed(Declaration),
    Typed(ty::TyDecl),
}

impl DisplayWithEngines for ResolvedDeclaration {
    fn fmt(&self, f: &mut fmt::Formatter<'_>, engines: &Engines) -> fmt::Result {
        match self {
            ResolvedDeclaration::Parsed(decl) => DisplayWithEngines::fmt(decl, f, engines),
            ResolvedDeclaration::Typed(decl) => DisplayWithEngines::fmt(decl, f, engines),
        }
    }
}

impl DebugWithEngines for ResolvedDeclaration {
    fn fmt(&self, f: &mut fmt::Formatter<'_>, engines: &Engines) -> fmt::Result {
        match self {
            ResolvedDeclaration::Parsed(decl) => DebugWithEngines::fmt(decl, f, engines),
            ResolvedDeclaration::Typed(decl) => DebugWithEngines::fmt(decl, f, engines),
        }
    }
}

impl PartialEqWithEngines for ResolvedDeclaration {
    fn eq(&self, other: &Self, ctx: &PartialEqWithEnginesContext) -> bool {
        match (self, other) {
            (ResolvedDeclaration::Parsed(lhs), ResolvedDeclaration::Parsed(rhs)) => {
                lhs.eq(rhs, ctx)
            }
            (ResolvedDeclaration::Typed(lhs), ResolvedDeclaration::Typed(rhs)) => lhs.eq(rhs, ctx),
            // TODO: Right now we consider differently represented resolved declarations to not be
            // equal. This is only used for comparing paths when doing imports, and we will be able
            // to safely remove it once we introduce normalized paths.
            (ResolvedDeclaration::Parsed(_lhs), ResolvedDeclaration::Typed(_rhs)) => false,
            (ResolvedDeclaration::Typed(_lhs), ResolvedDeclaration::Parsed(_rhs)) => false,
        }
    }
}

impl ResolvedDeclaration {
    pub fn is_typed(&self) -> bool {
        match self {
            ResolvedDeclaration::Parsed(_) => false,
            ResolvedDeclaration::Typed(_) => true,
        }
    }

    pub fn resolve_parsed(self, decl_engine: &DeclEngine) -> Declaration {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl,
            ResolvedDeclaration::Typed(ty_decl) => ty_decl
                .get_parsed_decl(decl_engine)
                .expect("expecting valid parsed declaration"),
        }
    }

    pub fn expect_parsed(self) -> Declaration {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl,
            ResolvedDeclaration::Typed(_ty_decl) => panic!(),
        }
    }

    pub fn expect_typed(self) -> ty::TyDecl {
        match self {
            ResolvedDeclaration::Parsed(_) => panic!(),
            ResolvedDeclaration::Typed(ty_decl) => ty_decl,
        }
    }

    pub fn expect_typed_ref(&self) -> &ty::TyDecl {
        match self {
            ResolvedDeclaration::Parsed(_) => panic!(),
            ResolvedDeclaration::Typed(ty_decl) => ty_decl,
        }
    }

    pub(crate) fn to_struct_decl(
        &self,
        handler: &Handler,
        engines: &Engines,
    ) -> Result<ResolvedDeclaration, ErrorEmitted> {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl
                .to_struct_decl(handler, engines)
                .map(|id| ResolvedDeclaration::Parsed(Declaration::StructDeclaration(id))),
            ResolvedDeclaration::Typed(decl) => decl.to_struct_decl(handler, engines).map(|id| {
                ResolvedDeclaration::Typed(TyDecl::StructDecl(StructDecl { decl_id: id }))
            }),
        }
    }

    pub(crate) fn to_enum_decl(
        &self,
        handler: &Handler,
        engines: &Engines,
    ) -> Result<ResolvedDeclaration, ErrorEmitted> {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl
                .to_enum_decl(handler, engines)
                .map(|id| ResolvedDeclaration::Parsed(Declaration::EnumDeclaration(id))),
            ResolvedDeclaration::Typed(decl) => decl
                .to_enum_id(handler, engines)
                .map(|id| ResolvedDeclaration::Typed(TyDecl::EnumDecl(EnumDecl { decl_id: id }))),
        }
    }

    pub(crate) fn visibility(&self, engines: &Engines) -> Visibility {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl.visibility(engines.pe()),
            ResolvedDeclaration::Typed(decl) => decl.visibility(engines.de()),
        }
    }

    pub(crate) fn span(&self, engines: &Engines) -> sway_types::Span {
        match self {
            ResolvedDeclaration::Parsed(decl) => decl.span(engines),
            ResolvedDeclaration::Typed(decl) => decl.span(engines),
        }
    }

    pub(crate) fn return_type(
        &self,
        handler: &Handler,
        engines: &Engines,
    ) -> Result<TypeId, ErrorEmitted> {
        match self {
            ResolvedDeclaration::Parsed(_decl) => unreachable!(),
            ResolvedDeclaration::Typed(decl) => decl.return_type(handler, engines),
        }
    }

    pub(crate) fn is_trait(&self) -> bool {
        match self {
            ResolvedDeclaration::Parsed(decl) => {
                matches!(decl, Declaration::TraitDeclaration(_))
            }
            ResolvedDeclaration::Typed(decl) => {
                matches!(decl, TyDecl::TraitDecl(_))
            }
        }
    }
}