25cbd8b591
* wiggle-generate: paramaterize library on module path to runtime This change makes no functional difference to users who only use the wiggle crate. Add a parameter to the `Names` constructor that determines the module that runtime components (e.g. GuestPtr, GuestError etc) of wiggle come from. For `wiggle` users this is just `quote!(wiggle)`, but other libraries which consume wiggle-generate may wrap and re-export wiggle under some other path, and not want their consumers to have to know about the wiggle dependency, e.g. `quote!(my_crate::some_path::wiggle)`. * wiggle-generate,macro: move more logic into macro better for code reuse elsewhere
77 lines
2.0 KiB
Rust
77 lines
2.0 KiB
Rust
pub mod config;
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mod funcs;
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mod lifetimes;
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mod module_trait;
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mod names;
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mod types;
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use proc_macro2::TokenStream;
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use quote::quote;
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use lifetimes::anon_lifetime;
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pub use config::Config;
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pub use funcs::define_func;
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pub use module_trait::define_module_trait;
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pub use names::Names;
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pub use types::define_datatype;
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pub fn generate(doc: &witx::Document, names: &Names) -> TokenStream {
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// TODO at some point config should grow more ability to configure name
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// overrides.
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let rt = names.runtime_mod();
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let types = doc.typenames().map(|t| define_datatype(&names, &t));
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let guest_error_methods = doc.error_types().map(|t| {
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let typename = names.type_ref(&t, anon_lifetime());
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let err_method = names.guest_error_conversion_method(&t);
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quote!(fn #err_method(&self, e: #rt::GuestError) -> #typename;)
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});
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let guest_error_conversion = quote! {
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pub trait GuestErrorConversion {
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#(#guest_error_methods)*
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}
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};
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let modules = doc.modules().map(|module| {
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let modname = names.module(&module.name);
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let trait_name = names.trait_name(&module.name);
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let fs = module
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.funcs()
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.map(|f| define_func(&names, &f, quote!(#trait_name)));
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let modtrait = define_module_trait(&names, &module);
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let ctx_type = names.ctx_type();
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quote!(
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pub mod #modname {
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use super::#ctx_type;
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use super::types::*;
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#(#fs)*
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#modtrait
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}
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)
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});
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quote!(
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pub mod types {
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#(#types)*
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#guest_error_conversion
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}
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#(#modules)*
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)
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}
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pub fn generate_metadata(doc: &witx::Document, names: &Names) -> TokenStream {
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let rt = names.runtime_mod();
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let doc_text = &format!("{}", doc);
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quote! {
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pub mod metadata {
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pub const DOC_TEXT: &str = #doc_text;
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pub fn document() -> #rt::witx::Document {
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#rt::witx::parse(DOC_TEXT).unwrap()
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}
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}
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}
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}
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