16824767628

Committed 08 Aug 2025 07:35AM UTC coverage: 27.748% (-0.03%) from 27.778%

Build # 16824767628

Build Type

Pull #542

github

Committed by

web-flow

Commit Message

Merge 44b890823 into 896cb945d

Pull Request Pull Request #542: feat: Add constructor visability

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0.0

/crates/macros/src/function.rs

use std::collections::HashMap;

use darling::{FromAttributes, ToTokens};
use proc_macro2::{Ident, Span, TokenStream};
use quote::{format_ident, quote};
use syn::spanned::Spanned as _;
use syn::{Expr, FnArg, GenericArgument, ItemFn, PatType, PathArguments, Type, TypePath};

use crate::helpers::get_docs;
use crate::parsing::{PhpRename, RenameRule, Visibility};
use crate::prelude::*;
use crate::syn_ext::DropLifetimes;

pub fn wrap(input: &syn::Path) -> Result<TokenStream> {
    let Some(func_name) = input.get_ident() else {
        bail!(input => "Pass a PHP function name into `wrap_function!()`.");
    };
    let builder_func = format_ident!("_internal_{func_name}");

    Ok(quote! {{
        (<#builder_func as ::ext_php_rs::internal::function::PhpFunction>::FUNCTION_ENTRY)()
    }})
}

#[derive(FromAttributes, Default, Debug)]
#[darling(default, attributes(php), forward_attrs(doc))]
struct PhpFunctionAttribute {
    #[darling(flatten)]
    rename: PhpRename,
    defaults: HashMap<Ident, Expr>,
    optional: Option<Ident>,
    vis: Option<Visibility>,
    attrs: Vec<syn::Attribute>,
}

pub fn parser(mut input: ItemFn) -> Result<TokenStream> {
    let php_attr = PhpFunctionAttribute::from_attributes(&input.attrs)?;
    input.attrs.retain(|attr| !attr.path().is_ident("php"));

    let args = Args::parse_from_fnargs(input.sig.inputs.iter(), php_attr.defaults)?;
    if let Some(ReceiverArg { span, .. }) = args.receiver {
        bail!(span => "Receiver arguments are invalid on PHP functions. See `#[php_impl]`.");
    }

    let docs = get_docs(&php_attr.attrs)?;

    let func = Function::new(
        &input.sig,
        php_attr
            .rename
            .rename(input.sig.ident.to_string(), RenameRule::Snake),
        args,
        php_attr.optional,
        docs,
    );
    let function_impl = func.php_function_impl();

    Ok(quote! {
        #input
        #function_impl
    })
}

#[derive(Debug)]
pub struct Function<'a> {
    /// Identifier of the Rust function associated with the function.
    pub ident: &'a Ident,
    /// Name of the function in PHP.
    pub name: String,
    /// Function arguments.
    pub args: Args<'a>,
    /// Function outputs.
    pub output: Option<&'a Type>,
    /// The first optional argument of the function.
    pub optional: Option<Ident>,
    /// Doc comments for the function.
    pub docs: Vec<String>,
}

#[derive(Debug)]
pub enum CallType<'a> {
    Function,
    Method {
        class: &'a syn::Path,
        receiver: MethodReceiver,
    },
}

/// Type of receiver on the method.
#[derive(Debug)]
pub enum MethodReceiver {
    /// Static method - has no receiver.
    Static,
    /// Class method, takes `&self` or `&mut self`.
    Class,
    /// Class method, takes `&mut ZendClassObject<Self>`.
    ZendClassObject,
}

impl<'a> Function<'a> {
    /// Parse a function.
    ///
    /// # Parameters
    ///
    /// * `sig` - Function signature.
    /// * `name` - Function name in PHP land.
    /// * `args` - Function arguments.
    /// * `optional` - The ident of the first optional argument.
    pub fn new(
        sig: &'a syn::Signature,
        name: String,
        args: Args<'a>,
        optional: Option<Ident>,
        docs: Vec<String>,
    ) -> Self {
        Self {
            ident: &sig.ident,
            name,
            args,
            output: match &sig.output {
                syn::ReturnType::Default => None,
                syn::ReturnType::Type(_, ty) => Some(&**ty),
            },
            optional,
            docs,
        }
    }

    /// Generates an internal identifier for the function.
    pub fn internal_ident(&self) -> Ident {
        format_ident!("_internal_{}", &self.ident)
    }

    /// Generates the function builder for the function.
    pub fn function_builder(&self, call_type: CallType) -> TokenStream {
        let name = &self.name;
        let (required, not_required) = self.args.split_args(self.optional.as_ref());

        // `handler` impl
        let arg_declarations = self
            .args
            .typed
            .iter()
            .map(TypedArg::arg_declaration)
            .collect::<Vec<_>>();

        // `entry` impl
        let required_args = required
            .iter()
            .map(TypedArg::arg_builder)
            .collect::<Vec<_>>();
        let not_required_args = not_required
            .iter()
            .map(TypedArg::arg_builder)
            .collect::<Vec<_>>();

        let returns = self.build_returns();
        let result = self.build_result(call_type, required, not_required);
        let docs = if self.docs.is_empty() {
            quote! {}
        } else {
            let docs = &self.docs;
            quote! {
                .docs(&[#(#docs),*])
            }
        };

        quote! {
            ::ext_php_rs::builders::FunctionBuilder::new(#name, {
                ::ext_php_rs::zend_fastcall! {
                    extern fn handler(
                        ex: &mut ::ext_php_rs::zend::ExecuteData,
                        retval: &mut ::ext_php_rs::types::Zval,
                    ) {
                        use ::ext_php_rs::convert::IntoZval;

                        #(#arg_declarations)*
                        let result = {
                            #result
                        };

                        if let Err(e) = result.set_zval(retval, false) {
                            let e: ::ext_php_rs::exception::PhpException = e.into();
                            e.throw().expect("Failed to throw PHP exception.");
                        }
                    }
                }
                handler
            })
            #(.arg(#required_args))*
            .not_required()
            #(.arg(#not_required_args))*
            #returns
            #docs
        }
    }

    fn build_returns(&self) -> Option<TokenStream> {
        self.output.cloned().map(|mut output| {
            output.drop_lifetimes();
            quote! {
                .returns(
                    <#output as ::ext_php_rs::convert::IntoZval>::TYPE,
                    false,
                    <#output as ::ext_php_rs::convert::IntoZval>::NULLABLE,
                )
            }
        })
    }

    fn build_result(
        &self,
        call_type: CallType,
        required: &[TypedArg<'_>],
        not_required: &[TypedArg<'_>],
    ) -> TokenStream {
        let ident = self.ident;
        let required_arg_names: Vec<_> = required.iter().map(|arg| arg.name).collect();
        let not_required_arg_names: Vec<_> = not_required.iter().map(|arg| arg.name).collect();

        let arg_accessors = self.args.typed.iter().map(|arg| {
            arg.accessor(|e| {
                quote! {
                    #e.throw().expect("Failed to throw PHP exception.");
                    return;
                }
            })
        });

        match call_type {
            CallType::Function => quote! {
                let parse = ex.parser()
                    #(.arg(&mut #required_arg_names))*
                    .not_required()
                    #(.arg(&mut #not_required_arg_names))*
                    .parse();
                if parse.is_err() {
                    return;
                }

                #ident(#({#arg_accessors}),*)
            },
            CallType::Method { class, receiver } => {
                let this = match receiver {
                    MethodReceiver::Static => quote! {
                        let parse = ex.parser();
                    },
                    MethodReceiver::ZendClassObject | MethodReceiver::Class => quote! {
                        let (parse, this) = ex.parser_method::<#class>();
                        let this = match this {
                            Some(this) => this,
                            None => {
                                ::ext_php_rs::exception::PhpException::default("Failed to retrieve reference to `$this`".into())
                                    .throw()
                                    .unwrap();
                                return;
                            }
                        };
                    },
                };
                let call = match receiver {
                    MethodReceiver::Static => {
                        quote! { #class::#ident(#({#arg_accessors}),*) }
                    }
                    MethodReceiver::Class => quote! { this.#ident(#({#arg_accessors}),*) },
                    MethodReceiver::ZendClassObject => {
                        quote! { #class::#ident(this, #({#arg_accessors}),*) }
                    }
                };
                quote! {
                    #this
                    let parse_result = parse
                        #(.arg(&mut #required_arg_names))*
                        .not_required()
                        #(.arg(&mut #not_required_arg_names))*
                        .parse();
                    if parse_result.is_err() {
                        return;
                    }

                    #call
                }
            }
        }
    }

    /// Generates a struct and impl for the `PhpFunction` trait.
    pub fn php_function_impl(&self) -> TokenStream {
        let internal_ident = self.internal_ident();
        let builder = self.function_builder(CallType::Function);

        quote! {
            #[doc(hidden)]
            #[allow(non_camel_case_types)]
            struct #internal_ident;

            impl ::ext_php_rs::internal::function::PhpFunction for #internal_ident {
                const FUNCTION_ENTRY: fn() -> ::ext_php_rs::builders::FunctionBuilder<'static> = {
                    fn entry() -> ::ext_php_rs::builders::FunctionBuilder<'static>
                    {
                        #builder
                    }
                    entry
                };
            }
        }
    }

    /// Returns a constructor metadata object for this function. This doesn't
    /// check if the function is a constructor, however.
    pub fn constructor_meta(
        &self,
        class: &syn::Path,
        visibility: Option<&Visibility>,
    ) -> TokenStream {
        let ident = self.ident;
        let (required, not_required) = self.args.split_args(self.optional.as_ref());
        let required_args = required
            .iter()
            .map(TypedArg::arg_builder)
            .collect::<Vec<_>>();
        let not_required_args = not_required
            .iter()
            .map(TypedArg::arg_builder)
            .collect::<Vec<_>>();

        let required_arg_names: Vec<_> = required.iter().map(|arg| arg.name).collect();
        let not_required_arg_names: Vec<_> = not_required.iter().map(|arg| arg.name).collect();
        let arg_declarations = self
            .args
            .typed
            .iter()
            .map(TypedArg::arg_declaration)
            .collect::<Vec<_>>();
        let arg_accessors = self.args.typed.iter().map(|arg| {
            arg.accessor(
                |e| quote! { return ::ext_php_rs::class::ConstructorResult::Exception(#e); },
            )
        });
        let variadic = self.args.typed.iter().any(|arg| arg.variadic).then(|| {
            quote! {
                .variadic()
            }
        });
        let docs = &self.docs;
        let flags = visibility.option_tokens();

        quote! {
            ::ext_php_rs::class::ConstructorMeta {
                constructor: {
                    fn inner(ex: &mut ::ext_php_rs::zend::ExecuteData) -> ::ext_php_rs::class::ConstructorResult<#class> {
                        #(#arg_declarations)*
                        let parse = ex.parser()
                            #(.arg(&mut #required_arg_names))*
                            .not_required()
                            #(.arg(&mut #not_required_arg_names))*
                            #variadic
                            .parse();
                        if parse.is_err() {
                            return ::ext_php_rs::class::ConstructorResult::ArgError;
                        }
                        #class::#ident(#({#arg_accessors}),*).into()
                    }
                    inner
                },
                build_fn: {
                    fn inner(func: ::ext_php_rs::builders::FunctionBuilder) -> ::ext_php_rs::builders::FunctionBuilder {
                        func
                            .docs(&[#(#docs),*])
                            #(.arg(#required_args))*
                            .not_required()
                            #(.arg(#not_required_args))*
                            #variadic
                    }
                    inner
                },
                flags: #flags
            }
        }
    }
}

#[derive(Debug)]
pub struct ReceiverArg {
    pub _mutable: bool,
    pub span: Span,
}

#[derive(Debug)]
pub struct TypedArg<'a> {
    pub name: &'a Ident,
    pub ty: Type,
    pub nullable: bool,
    pub default: Option<Expr>,
    pub as_ref: bool,
    pub variadic: bool,
}

#[derive(Debug)]
pub struct Args<'a> {
    pub receiver: Option<ReceiverArg>,
    pub typed: Vec<TypedArg<'a>>,
}

impl<'a> Args<'a> {
    pub fn parse_from_fnargs(
        args: impl Iterator<Item = &'a FnArg>,
        mut defaults: HashMap<Ident, Expr>,
    ) -> Result<Self> {
        let mut result = Self {
            receiver: None,
            typed: vec![],
        };
        for arg in args {
            match arg {
                FnArg::Receiver(receiver) => {
                    if receiver.reference.is_none() {
                        bail!(receiver => "PHP objects are heap-allocated and cannot be passed by value. Try using `&self` or `&mut self`.");
                    } else if result.receiver.is_some() {
                        bail!(receiver => "Too many receivers specified.")
                    }
                    result.receiver.replace(ReceiverArg {
                        _mutable: receiver.mutability.is_some(),
                        span: receiver.span(),
                    });
                }
                FnArg::Typed(PatType { pat, ty, .. }) => {
                    let syn::Pat::Ident(syn::PatIdent { ident, .. }) = &**pat else {
                        bail!(pat => "Unsupported argument.");
                    };

                    // If the variable is `&[&Zval]` treat it as the variadic argument.
                    let default = defaults.remove(ident);
                    let nullable = type_is_nullable(ty.as_ref(), default.is_some())?;
                    let (variadic, as_ref, ty) = Self::parse_typed(ty);
                    result.typed.push(TypedArg {
                        name: ident,
                        ty,
                        nullable,
                        default,
                        as_ref,
                        variadic,
                    });
                }
            }
        }
        Ok(result)
    }

    fn parse_typed(ty: &Type) -> (bool, bool, Type) {
        match ty {
            Type::Reference(ref_) => {
                let as_ref = ref_.mutability.is_some();
                match ref_.elem.as_ref() {
                    Type::Slice(slice) => (
                        // TODO: Allow specifying the variadic type.
                        slice.elem.to_token_stream().to_string() == "& Zval",
                        as_ref,
                        ty.clone(),
                    ),
                    _ => (false, as_ref, ty.clone()),
                }
            }
            Type::Path(TypePath { path, .. }) => {
                let mut as_ref = false;

                // For for types that are `Option<&mut T>` to turn them into
                // `Option<&T>`, marking the Arg as as "passed by reference".
                let ty = path
                    .segments
                    .last()
                    .filter(|seg| seg.ident == "Option")
                    .and_then(|seg| {
                        if let PathArguments::AngleBracketed(args) = &seg.arguments {
                            args.args
                                .iter()
                                .find(|arg| matches!(arg, GenericArgument::Type(_)))
                                .and_then(|ga| match ga {
                                    GenericArgument::Type(ty) => Some(match ty {
                                        Type::Reference(r) => {
                                            let mut new_ref = r.clone();
                                            new_ref.mutability = None;
                                            as_ref = true;
                                            Type::Reference(new_ref)
                                        }
                                        _ => ty.clone(),
                                    }),
                                    _ => None,
                                })
                        } else {
                            None
                        }
                    })
                    .unwrap_or_else(|| ty.clone());
                (false, as_ref, ty.clone())
            }
            _ => (false, false, ty.clone()),
        }
    }

    /// Splits the typed arguments into two slices:
    ///
    /// 1. Required arguments.
    /// 2. Non-required arguments.
    ///
    /// # Parameters
    ///
    /// * `optional` - The first optional argument. If [`None`], the optional
    ///   arguments will be from the first nullable argument after the last
    ///   non-nullable argument to the end of the arguments.
    pub fn split_args(&self, optional: Option<&Ident>) -> (&[TypedArg<'a>], &[TypedArg<'a>]) {
        let mut mid = None;
        for (i, arg) in self.typed.iter().enumerate() {
            if let Some(optional) = optional {
                if optional == arg.name {
                    mid.replace(i);
                }
            } else if mid.is_none() && arg.nullable {
                mid.replace(i);
            } else if !arg.nullable {
                mid.take();
            }
        }
        match mid {
            Some(mid) => (&self.typed[..mid], &self.typed[mid..]),
            None => (&self.typed[..], &self.typed[0..0]),
        }
    }
}

impl TypedArg<'_> {
    /// Returns a 'clean type' with the lifetimes removed. This allows the type
    /// to be used outside of the original function context.
    fn clean_ty(&self) -> Type {
        let mut ty = self.ty.clone();
        ty.drop_lifetimes();

        // Variadic arguments are passed as slices, so we need to extract the
        // inner type.
        if self.variadic {
            let Type::Reference(reference) = &ty else {
                return ty;
            };

            if let Type::Slice(inner) = &*reference.elem {
                return *inner.elem.clone();
            }
        }

        ty
    }

    /// Returns a token stream containing an argument declaration, where the
    /// name of the variable holding the arg is the name of the argument.
    fn arg_declaration(&self) -> TokenStream {
        let name = self.name;
        let val = self.arg_builder();
        quote! {
            let mut #name = #val;
        }
    }

    /// Returns a token stream containing the `Arg` definition to be passed to
    /// `ext-php-rs`.
    fn arg_builder(&self) -> TokenStream {
        let name = self.name.to_string();
        let ty = self.clean_ty();
        let null = if self.nullable {
            Some(quote! { .allow_null() })
        } else {
            None
        };
        let default = self.default.as_ref().map(|val| {
            let val = val.to_token_stream().to_string();
            quote! {
                .default(#val)
            }
        });
        let as_ref = if self.as_ref {
            Some(quote! { .as_ref() })
        } else {
            None
        };
        let variadic = self.variadic.then(|| quote! { .is_variadic() });
        quote! {
            ::ext_php_rs::args::Arg::new(#name, <#ty as ::ext_php_rs::convert::FromZvalMut>::TYPE)
                #null
                #default
                #as_ref
                #variadic
        }
    }

    /// Get the accessor used to access the value of the argument.
    fn accessor(&self, bail_fn: impl Fn(TokenStream) -> TokenStream) -> TokenStream {
        let name = self.name;
        if let Some(default) = &self.default {
            quote! {
                #name.val().unwrap_or(#default.into())
            }
        } else if self.variadic {
            quote! {
                &#name.variadic_vals()
            }
        } else if self.nullable {
            // Originally I thought we could just use the below case for `null` options, as
            // `val()` will return `Option<Option<T>>`, however, this isn't the case when
            // the argument isn't given, as the underlying zval is null.
            quote! {
                #name.val()
            }
        } else {
            let bail = bail_fn(quote! {
                ::ext_php_rs::exception::PhpException::default(
                    concat!("Invalid value given for argument `", stringify!(#name), "`.").into()
                )
            });
            quote! {
                match #name.val() {
                    Some(val) => val,
                    None => {
                        #bail;
                    }
                }
            }
        }
    }
}

/// Returns true of the given type is nullable in PHP.
// TODO(david): Eventually move to compile-time constants for this (similar to
// FromZval::NULLABLE).
pub fn type_is_nullable(ty: &Type, has_default: bool) -> Result<bool> {
    Ok(match ty {
        syn::Type::Path(path) => {
            has_default
                || path
                    .path
                    .segments
                    .iter()
                    .next_back()
                    .is_some_and(|seg| seg.ident == "Option")
        }
        syn::Type::Reference(_) => false, /* Reference cannot be nullable unless */
        // wrapped in `Option` (in that case it'd be a Path).
        _ => bail!(ty => "Unsupported argument type."),
    })
}

1	use std::collections::HashMap;
2
3	use darling::{FromAttributes, ToTokens};
4	use proc_macro2::{Ident, Span, TokenStream};
5	use quote::{format_ident, quote};
6	use syn::spanned::Spanned as _;
7	use syn::{Expr, FnArg, GenericArgument, ItemFn, PatType, PathArguments, Type, TypePath};
8
9	use crate::helpers::get_docs;
10	use crate::parsing::{PhpRename, RenameRule, Visibility};
11	use crate::prelude::*;
12	use crate::syn_ext::DropLifetimes;
13
14	pub fn wrap(input: &syn::Path) -> Result<TokenStream> {	×
15	let Some(func_name) = input.get_ident() else {	×
16	bail!(input => "Pass a PHP function name into `wrap_function!()`.");	×
17	};
18	let builder_func = format_ident!("_internal_{func_name}");
19
20	Ok(quote! {{
21	(<#builder_func as ::ext_php_rs::internal::function::PhpFunction>::FUNCTION_ENTRY)()
22	}})
23	}
24
25	#[derive(FromAttributes, Default, Debug)]
26	#[darling(default, attributes(php), forward_attrs(doc))]
27	struct PhpFunctionAttribute {
28	#[darling(flatten)]
29	rename: PhpRename,
30	defaults: HashMap<Ident, Expr>,
31	optional: Option<Ident>,
32	vis: Option<Visibility>,
33	attrs: Vec<syn::Attribute>,
34	}
35
36	pub fn parser(mut input: ItemFn) -> Result<TokenStream> {	×
37	let php_attr = PhpFunctionAttribute::from_attributes(&input.attrs)?;	×
38	input.attrs.retain(\|attr\| !attr.path().is_ident("php"));	×
39
40	let args = Args::parse_from_fnargs(input.sig.inputs.iter(), php_attr.defaults)?;	×
41	if let Some(ReceiverArg { span, .. }) = args.receiver {	×
42	bail!(span => "Receiver arguments are invalid on PHP functions. See `#[php_impl]`.");
43	}
44
45	let docs = get_docs(&php_attr.attrs)?;	×
46
47	let func = Function::new(
48	&input.sig,
49	php_attr
50	.rename
51	.rename(input.sig.ident.to_string(), RenameRule::Snake),
52	args,
53	php_attr.optional,
54	docs,
55	);
56	let function_impl = func.php_function_impl();
57
58	Ok(quote! {
59	#input
60	#function_impl
61	})
62	}
63
64	#[derive(Debug)]
65	pub struct Function<'a> {
66	/// Identifier of the Rust function associated with the function.
67	pub ident: &'a Ident,
68	/// Name of the function in PHP.
69	pub name: String,
70	/// Function arguments.
71	pub args: Args<'a>,
72	/// Function outputs.
73	pub output: Option<&'a Type>,
74	/// The first optional argument of the function.
75	pub optional: Option<Ident>,
76	/// Doc comments for the function.
77	pub docs: Vec<String>,
78	}
79
80	#[derive(Debug)]
81	pub enum CallType<'a> {
82	Function,
83	Method {
84	class: &'a syn::Path,
85	receiver: MethodReceiver,
86	},
87	}
88
89	/// Type of receiver on the method.
90	#[derive(Debug)]
91	pub enum MethodReceiver {
92	/// Static method - has no receiver.
93	Static,
94	/// Class method, takes `&self` or `&mut self`.
95	Class,
96	/// Class method, takes `&mut ZendClassObject<Self>`.
97	ZendClassObject,
98	}
99
100	impl<'a> Function<'a> {
101	/// Parse a function.
102	///
103	/// # Parameters
104	///
105	/// * `sig` - Function signature.
106	/// * `name` - Function name in PHP land.
107	/// * `args` - Function arguments.
108	/// * `optional` - The ident of the first optional argument.
109	pub fn new(	×
110	sig: &'a syn::Signature,
111	name: String,
112	args: Args<'a>,
113	optional: Option<Ident>,
114	docs: Vec<String>,
115	) -> Self {
116	Self {
117	ident: &sig.ident,	×
118	name,
119	args,
120	output: match &sig.output {	×
121	syn::ReturnType::Default => None,
122	syn::ReturnType::Type(_, ty) => Some(&**ty),
123	},
124	optional,
125	docs,
126	}
127	}
128
129	/// Generates an internal identifier for the function.
130	pub fn internal_ident(&self) -> Ident {	×
131	format_ident!("_internal_{}", &self.ident)	×
132	}
133
134	/// Generates the function builder for the function.
135	pub fn function_builder(&self, call_type: CallType) -> TokenStream {	×
136	let name = &self.name;	×
137	let (required, not_required) = self.args.split_args(self.optional.as_ref());	×
138
139	// `handler` impl
140	let arg_declarations = self	×
141	.args	×
142	.typed	×
143	.iter()
144	.map(TypedArg::arg_declaration)	×
145	.collect::<Vec<_>>();
146
147	// `entry` impl
148	let required_args = required	×
149	.iter()
150	.map(TypedArg::arg_builder)	×
151	.collect::<Vec<_>>();
152	let not_required_args = not_required	×
153	.iter()
154	.map(TypedArg::arg_builder)	×
155	.collect::<Vec<_>>();
156
157	let returns = self.build_returns();	×
158	let result = self.build_result(call_type, required, not_required);	×
159	let docs = if self.docs.is_empty() {	×
160	quote! {}	×
161	} else {
162	let docs = &self.docs;	×
163	quote! {	×
164	.docs(&[#(#docs),*])	×
165	}
166	};
167
168	quote! {	×
169	::ext_php_rs::builders::FunctionBuilder::new(#name, {	×
170	::ext_php_rs::zend_fastcall! {	×
171	extern fn handler(	×
172	ex: &mut ::ext_php_rs::zend::ExecuteData,	×
173	retval: &mut ::ext_php_rs::types::Zval,	×
174	) {
175	use ::ext_php_rs::convert::IntoZval;	×
176
177	#(#arg_declarations)*	×
178	let result = {	×
179	#result	×
180	};
181
182	if let Err(e) = result.set_zval(retval, false) {	×
183	let e: ::ext_php_rs::exception::PhpException = e.into();	×
184	e.throw().expect("Failed to throw PHP exception.");	×
185	}
186	}
187	}
188	handler	×
189	})
190	#(.arg(#required_args))*	×
191	.not_required()	×
192	#(.arg(#not_required_args))*	×
193	#returns	×
194	#docs	×
195	}
196	}
197
198	fn build_returns(&self) -> Option<TokenStream> {	×
199	self.output.cloned().map(\|mut output\| {	×
200	output.drop_lifetimes();	×
201	quote! {	×
202	.returns(	×
203	<#output as ::ext_php_rs::convert::IntoZval>::TYPE,	×
204	false,	×
205	<#output as ::ext_php_rs::convert::IntoZval>::NULLABLE,	×
206	)
207	}
208	})
209	}
210
211	fn build_result(	×
212	&self,
213	call_type: CallType,
214	required: &[TypedArg<'_>],
215	not_required: &[TypedArg<'_>],
216	) -> TokenStream {
217	let ident = self.ident;	×
218	let required_arg_names: Vec<_> = required.iter().map(\|arg\| arg.name).collect();	×
219	let not_required_arg_names: Vec<_> = not_required.iter().map(\|arg\| arg.name).collect();	×
220
221	let arg_accessors = self.args.typed.iter().map(\|arg\| {	×
222	arg.accessor(\|e\| {	×
223	quote! {	×
224	#e.throw().expect("Failed to throw PHP exception.");	×
225	return;	×
226	}
227	})
228	});
229
230	match call_type {	×
231	CallType::Function => quote! {	×
232	let parse = ex.parser()	×
233	#(.arg(&mut #required_arg_names))*	×
234	.not_required()	×
235	#(.arg(&mut #not_required_arg_names))*	×
236	.parse();	×
237	if parse.is_err() {	×
238	return;	×
239	}
240
241	#ident(#({#arg_accessors}),*)	×
242	},
243	CallType::Method { class, receiver } => {	×
244	let this = match receiver {	×
245	MethodReceiver::Static => quote! {	×
246	let parse = ex.parser();	×
247	},
248	MethodReceiver::ZendClassObject \| MethodReceiver::Class => quote! {	×
249	let (parse, this) = ex.parser_method::<#class>();	×
250	let this = match this {	×
251	Some(this) => this,	×
252	None => {	×
253	::ext_php_rs::exception::PhpException::default("Failed to retrieve reference to `$this`".into())	×
254	.throw()	×
255	.unwrap();	×
256	return;	×
257	}
258	};
259	},
260	};
261	let call = match receiver {	×
262	MethodReceiver::Static => {	×
263	quote! { #class::#ident(#({#arg_accessors}),*) }	×
264	}
265	MethodReceiver::Class => quote! { this.#ident(#({#arg_accessors}),*) },	×
266	MethodReceiver::ZendClassObject => {	×
267	quote! { #class::#ident(this, #({#arg_accessors}),*) }	×
268	}
269	};
270	quote! {	×
271	#this	×
272	let parse_result = parse	×
273	#(.arg(&mut #required_arg_names))*	×
274	.not_required()	×
275	#(.arg(&mut #not_required_arg_names))*	×
276	.parse();	×
277	if parse_result.is_err() {	×
278	return;	×
279	}
280
281	#call	×
282	}
283	}
284	}
285	}
286
287	/// Generates a struct and impl for the `PhpFunction` trait.
288	pub fn php_function_impl(&self) -> TokenStream {	×
289	let internal_ident = self.internal_ident();	×
290	let builder = self.function_builder(CallType::Function);	×
291
292	quote! {	×
293	#[doc(hidden)]	×
294	#[allow(non_camel_case_types)]	×
295	struct #internal_ident;	×
296
297	impl ::ext_php_rs::internal::function::PhpFunction for #internal_ident {	×
298	const FUNCTION_ENTRY: fn() -> ::ext_php_rs::builders::FunctionBuilder<'static> = {	×
299	fn entry() -> ::ext_php_rs::builders::FunctionBuilder<'static>	×
300	{
301	#builder	×
302	}
303	entry	×
304	};
305	}
306	}
307	}
308
309	/// Returns a constructor metadata object for this function. This doesn't
310	/// check if the function is a constructor, however.
NEW 311	pub fn constructor_meta(	×
312	&self,
313	class: &syn::Path,
314	visibility: Option<&Visibility>,
315	) -> TokenStream {
316	let ident = self.ident;	×
317	let (required, not_required) = self.args.split_args(self.optional.as_ref());	×
318	let required_args = required	×
319	.iter()
320	.map(TypedArg::arg_builder)	×
321	.collect::<Vec<_>>();
322	let not_required_args = not_required	×
323	.iter()
324	.map(TypedArg::arg_builder)	×
325	.collect::<Vec<_>>();
326
327	let required_arg_names: Vec<_> = required.iter().map(\|arg\| arg.name).collect();	×
328	let not_required_arg_names: Vec<_> = not_required.iter().map(\|arg\| arg.name).collect();	×
329	let arg_declarations = self	×
330	.args	×
331	.typed	×
332	.iter()
333	.map(TypedArg::arg_declaration)	×
334	.collect::<Vec<_>>();
335	let arg_accessors = self.args.typed.iter().map(\|arg\| {	×
336	arg.accessor(	×
337	\|e\| quote! { return ::ext_php_rs::class::ConstructorResult::Exception(#e); },	×
338	)
339	});
340	let variadic = self.args.typed.iter().any(\|arg\| arg.variadic).then(\|\| {	×
341	quote! {	×
342	.variadic()	×
343	}
344	});
345	let docs = &self.docs;	×
NEW 346	let flags = visibility.option_tokens();	×
347
348	quote! {	×
349	::ext_php_rs::class::ConstructorMeta {	×
350	constructor: {	×
351	fn inner(ex: &mut ::ext_php_rs::zend::ExecuteData) -> ::ext_php_rs::class::ConstructorResult<#class> {	×
352	#(#arg_declarations)*	×
353	let parse = ex.parser()	×
354	#(.arg(&mut #required_arg_names))*	×
355	.not_required()	×
356	#(.arg(&mut #not_required_arg_names))*	×
357	#variadic	×
358	.parse();	×
359	if parse.is_err() {	×
360	return ::ext_php_rs::class::ConstructorResult::ArgError;	×
361	}
362	#class::#ident(#({#arg_accessors}),*).into()	×
363	}
364	inner	×
365	},
366	build_fn: {	×
367	fn inner(func: ::ext_php_rs::builders::FunctionBuilder) -> ::ext_php_rs::builders::FunctionBuilder {	×
368	func	×
369	.docs(&[#(#docs),*])	×
370	#(.arg(#required_args))*	×
371	.not_required()	×
372	#(.arg(#not_required_args))*	×
373	#variadic	×
374	}
375	inner	×
376	},
NEW 377	flags: #flags	×
378	}
379	}
380	}
381	}
382
383	#[derive(Debug)]
384	pub struct ReceiverArg {
385	pub _mutable: bool,
386	pub span: Span,
387	}
388
389	#[derive(Debug)]
390	pub struct TypedArg<'a> {
391	pub name: &'a Ident,
392	pub ty: Type,
393	pub nullable: bool,
394	pub default: Option<Expr>,
395	pub as_ref: bool,
396	pub variadic: bool,
397	}
398
399	#[derive(Debug)]
400	pub struct Args<'a> {
401	pub receiver: Option<ReceiverArg>,
402	pub typed: Vec<TypedArg<'a>>,
403	}
404
405	impl<'a> Args<'a> {
406	pub fn parse_from_fnargs(	×
407	args: impl Iterator<Item = &'a FnArg>,
408	mut defaults: HashMap<Ident, Expr>,
409	) -> Result<Self> {
410	let mut result = Self {
411	receiver: None,
412	typed: vec![],	×
413	};
414	for arg in args {	×
415	match arg {	×
416	FnArg::Receiver(receiver) => {	×
417	if receiver.reference.is_none() {	×
418	bail!(receiver => "PHP objects are heap-allocated and cannot be passed by value. Try using `&self` or `&mut self`.");	×
419	} else if result.receiver.is_some() {	×
420	bail!(receiver => "Too many receivers specified.")	×
421	}
422	result.receiver.replace(ReceiverArg {	×
423	_mutable: receiver.mutability.is_some(),	×
424	span: receiver.span(),	×
425	});
426	}
427	FnArg::Typed(PatType { pat, ty, .. }) => {	×
428	let syn::Pat::Ident(syn::PatIdent { ident, .. }) = &**pat else {	×
429	bail!(pat => "Unsupported argument.");	×
430	};
431
432	// If the variable is `&[&Zval]` treat it as the variadic argument.
433	let default = defaults.remove(ident);	×
434	let nullable = type_is_nullable(ty.as_ref(), default.is_some())?;	×
435	let (variadic, as_ref, ty) = Self::parse_typed(ty);	×
436	result.typed.push(TypedArg {	×
437	name: ident,	×
438	ty,	×
439	nullable,	×
440	default,	×
441	as_ref,	×
442	variadic,	×
443	});
444	}
445	}
446	}
447	Ok(result)	×
448	}
449
450	fn parse_typed(ty: &Type) -> (bool, bool, Type) {	×
451	match ty {	×
452	Type::Reference(ref_) => {	×
453	let as_ref = ref_.mutability.is_some();	×
454	match ref_.elem.as_ref() {	×
455	Type::Slice(slice) => (	×
456	// TODO: Allow specifying the variadic type.
457	slice.elem.to_token_stream().to_string() == "& Zval",	×
458	as_ref,	×
459	ty.clone(),	×
460	),
461	_ => (false, as_ref, ty.clone()),	×
462	}
463	}
464	Type::Path(TypePath { path, .. }) => {	×
465	let mut as_ref = false;	×
466
467	// For for types that are `Option<&mut T>` to turn them into
468	// `Option<&T>`, marking the Arg as as "passed by reference".
469	let ty = path	×
470	.segments	×
471	.last()
472	.filter(\|seg\| seg.ident == "Option")	×
473	.and_then(\|seg\| {	×
474	if let PathArguments::AngleBracketed(args) = &seg.arguments {	×
475	args.args	×
476	.iter()	×
477	.find(\|arg\| matches!(arg, GenericArgument::Type(_)))	×
478	.and_then(\|ga\| match ga {	×
479	GenericArgument::Type(ty) => Some(match ty {	×
480	Type::Reference(r) => {	×
481	let mut new_ref = r.clone();	×
482	new_ref.mutability = None;	×
483	as_ref = true;	×
484	Type::Reference(new_ref)	×
485	}
486	_ => ty.clone(),	×
487	}),
488	_ => None,	×
489	})
490	} else {
491	None	×
492	}
493	})
494	.unwrap_or_else(\|\| ty.clone());	×
495	(false, as_ref, ty.clone())	×
496	}
497	_ => (false, false, ty.clone()),	×
498	}
499	}
500
501	/// Splits the typed arguments into two slices:
502	///
503	/// 1. Required arguments.
504	/// 2. Non-required arguments.
505	///
506	/// # Parameters
507	///
508	/// * `optional` - The first optional argument. If [`None`], the optional
509	/// arguments will be from the first nullable argument after the last
510	/// non-nullable argument to the end of the arguments.
511	pub fn split_args(&self, optional: Option<&Ident>) -> (&[TypedArg<'a>], &[TypedArg<'a>]) {	×
512	let mut mid = None;	×
513	for (i, arg) in self.typed.iter().enumerate() {	×
514	if let Some(optional) = optional {	×
515	if optional == arg.name {	×
516	mid.replace(i);	×
517	}
518	} else if mid.is_none() && arg.nullable {	×
519	mid.replace(i);	×
520	} else if !arg.nullable {	×
521	mid.take();	×
522	}
523	}
524	match mid {	×
525	Some(mid) => (&self.typed[..mid], &self.typed[mid..]),	×
526	None => (&self.typed[..], &self.typed[0..0]),	×
527	}
528	}
529	}
530
531	impl TypedArg<'_> {
532	/// Returns a 'clean type' with the lifetimes removed. This allows the type
533	/// to be used outside of the original function context.
534	fn clean_ty(&self) -> Type {	×
535	let mut ty = self.ty.clone();	×
536	ty.drop_lifetimes();	×
537
538	// Variadic arguments are passed as slices, so we need to extract the
539	// inner type.
540	if self.variadic {	×
541	let Type::Reference(reference) = &ty else {	×
542	return ty;	×
543	};
544
545	if let Type::Slice(inner) = &*reference.elem {	×
546	return *inner.elem.clone();
547	}
548	}
549
550	ty	×
551	}
552
553	/// Returns a token stream containing an argument declaration, where the
554	/// name of the variable holding the arg is the name of the argument.
555	fn arg_declaration(&self) -> TokenStream {	×
556	let name = self.name;	×
557	let val = self.arg_builder();	×
558	quote! {	×
559	let mut #name = #val;
560	}
561	}
562
563	/// Returns a token stream containing the `Arg` definition to be passed to
564	/// `ext-php-rs`.
565	fn arg_builder(&self) -> TokenStream {	×
566	let name = self.name.to_string();	×
567	let ty = self.clean_ty();	×
568	let null = if self.nullable {	×
569	Some(quote! { .allow_null() })	×
570	} else {
571	None	×
572	};
573	let default = self.default.as_ref().map(\|val\| {	×
574	let val = val.to_token_stream().to_string();	×
575	quote! {	×
576	.default(#val)
577	}
578	});
579	let as_ref = if self.as_ref {	×
580	Some(quote! { .as_ref() })	×
581	} else {
582	None	×
583	};
584	let variadic = self.variadic.then(\|\| quote! { .is_variadic() });	×
585	quote! {	×
586	::ext_php_rs::args::Arg::new(#name, <#ty as ::ext_php_rs::convert::FromZvalMut>::TYPE)
587	#null
588	#default
589	#as_ref
590	#variadic
591	}
592	}
593
594	/// Get the accessor used to access the value of the argument.
595	fn accessor(&self, bail_fn: impl Fn(TokenStream) -> TokenStream) -> TokenStream {	×
596	let name = self.name;	×
597	if let Some(default) = &self.default {	×
598	quote! {	×
599	#name.val().unwrap_or(#default.into())	×
600	}
601	} else if self.variadic {	×
602	quote! {	×
603	&#name.variadic_vals()	×
604	}
605	} else if self.nullable {	×
606	// Originally I thought we could just use the below case for `null` options, as
607	// `val()` will return `Option<Option<T>>`, however, this isn't the case when
608	// the argument isn't given, as the underlying zval is null.
609	quote! {	×
610	#name.val()	×
611	}
612	} else {
613	let bail = bail_fn(quote! {	×
614	::ext_php_rs::exception::PhpException::default(	×
615	concat!("Invalid value given for argument `", stringify!(#name), "`.").into()	×
616	)
617	});
618	quote! {	×
619	match #name.val() {	×
620	Some(val) => val,	×
621	None => {	×
622	#bail;	×
623	}
624	}
625	}
626	}
627	}
628	}
629
630	/// Returns true of the given type is nullable in PHP.
631	// TODO(david): Eventually move to compile-time constants for this (similar to
632	// FromZval::NULLABLE).
633	pub fn type_is_nullable(ty: &Type, has_default: bool) -> Result<bool> {	×
634	Ok(match ty {	×
635	syn::Type::Path(path) => {	×
636	has_default
637	\|\| path	×
638	.path	×
639	.segments	×
640	.iter()	×
641	.next_back()
642	.is_some_and(\|seg\| seg.ident == "Option")	×
643	}
644	syn::Type::Reference(_) => false, /* Reference cannot be nullable unless */	×
645	// wrapped in `Option` (in that case it'd be a Path).
646	_ => bail!(ty => "Unsupported argument type."),	×
647	})
648	}

davidcole1340 / ext-php-rs / 16824767628

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