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use crate::codegen::program::common::*;
use crate::parser;
use crate::Program;
use heck::CamelCase;
use quote::quote;
pub fn generate(program: &Program) -> proc_macro2::TokenStream {
let ctor_variant = match &program.state {
None => quote! {},
Some(state) => {
let ctor_args: Vec<proc_macro2::TokenStream> = generate_ctor_typed_args(state)
.iter()
.map(|arg| {
format!("pub {}", parser::tts_to_string(arg))
.parse()
.unwrap()
})
.collect();
let strct = {
if ctor_args.is_empty() {
quote! {
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct New;
}
} else {
quote! {
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct New {
#(#ctor_args),*
}
}
}
};
let sighash_arr = sighash_ctor();
let sighash_tts: proc_macro2::TokenStream =
format!("{:?}", sighash_arr).parse().unwrap();
quote! {
/// Instruction arguments to the `#[state]`'s `new`
/// constructor.
#strct
impl anchor_lang::Discriminator for New {
const DISCRIMINATOR: [u8; 8] = #sighash_tts;
}
impl anchor_lang::InstructionData for New {}
impl anchor_lang::Owner for New {
fn owner() -> Pubkey {
ID
}
}
}
}
};
let state_method_variants: Vec<proc_macro2::TokenStream> = match &program.state {
None => vec![],
Some(state) => state
.impl_block_and_methods
.as_ref()
.map(|(_impl_block, methods)| {
methods
.iter()
.map(|method| {
let ix_name_camel: proc_macro2::TokenStream = method
.raw_method
.sig
.ident
.to_string()
.to_camel_case()
.parse()
.unwrap();
let raw_args: Vec<proc_macro2::TokenStream> = method
.args
.iter()
.map(|arg| {
format!("pub {}", parser::tts_to_string(&arg.raw_arg))
.parse()
.unwrap()
})
.collect();
let ix_data_trait = {
let name = method.raw_method.sig.ident.to_string();
let sighash_arr = sighash(SIGHASH_STATE_NAMESPACE, &name);
let sighash_tts: proc_macro2::TokenStream =
format!("{:?}", sighash_arr).parse().unwrap();
quote! {
impl anchor_lang::Discriminator for #ix_name_camel {
const DISCRIMINATOR: [u8; 8] = #sighash_tts;
}
impl anchor_lang::InstructionData for #ix_name_camel {}
impl anchor_lang::Owner for #ix_name_camel {
fn owner() -> Pubkey {
ID
}
}
}
};
// If no args, output a "unit" variant instead of a struct variant.
if method.args.is_empty() {
quote! {
/// Anchor generated instruction.
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct #ix_name_camel;
#ix_data_trait
}
} else {
quote! {
/// Anchor generated instruction.
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct #ix_name_camel {
#(#raw_args),*
}
#ix_data_trait
}
}
})
.collect()
})
.unwrap_or_default(),
};
let variants: Vec<proc_macro2::TokenStream> = program
.ixs
.iter()
.map(|ix| {
let name = &ix.raw_method.sig.ident.to_string();
let ix_name_camel =
proc_macro2::Ident::new(&name.to_camel_case(), ix.raw_method.sig.ident.span());
let raw_args: Vec<proc_macro2::TokenStream> = ix
.args
.iter()
.map(|arg| {
format!("pub {}", parser::tts_to_string(&arg.raw_arg))
.parse()
.unwrap()
})
.collect();
let ix_data_trait = {
let sighash_arr = sighash(SIGHASH_GLOBAL_NAMESPACE, name);
let sighash_tts: proc_macro2::TokenStream =
format!("{:?}", sighash_arr).parse().unwrap();
quote! {
impl anchor_lang::Discriminator for #ix_name_camel {
const DISCRIMINATOR: [u8; 8] = #sighash_tts;
}
impl anchor_lang::InstructionData for #ix_name_camel {}
impl anchor_lang::Owner for #ix_name_camel {
fn owner() -> Pubkey {
ID
}
}
}
};
// If no args, output a "unit" variant instead of a struct variant.
if ix.args.is_empty() {
quote! {
/// Instruction.
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct #ix_name_camel;
#ix_data_trait
}
} else {
quote! {
/// Instruction.
#[derive(AnchorSerialize, AnchorDeserialize)]
pub struct #ix_name_camel {
#(#raw_args),*
}
#ix_data_trait
}
}
})
.collect();
quote! {
/// An Anchor generated module containing the program's set of
/// instructions, where each method handler in the `#[program]` mod is
/// associated with a struct defining the input arguments to the
/// method. These should be used directly, when one wants to serialize
/// Anchor instruction data, for example, when speciying
/// instructions on a client.
pub mod instruction {
use super::*;
/// Instruction struct definitions for `#[state]` methods.
pub mod state {
use super::*;
#ctor_variant
#(#state_method_variants)*
}
#(#variants)*
}
}
}