Claude
ed62264870
- ast.rs: Full AST for .mrs files (MacroDef, Pattern, OutputBody, TemplateItem) - parser.rs: Hand-written recursive descent parser with line/col error reporting - codegen.rs: Transforms AST to Rust proc macro code using syn/quote/proc_macro2 - main.rs: CLI reads .mrs file, runs parse→codegen, writes to stdout or file - Cargo.toml: Workspace with syn, quote, proc-macro2, prettyplease deps - examples/: hello.mrs, derive_builder.mrs, declare_table.mrs reference examples All three reference examples parse and produce prettyplease-formatted Rust output. Generated code uses syn::parse::Parser closures for structural patterns, quote! for token templates, spread iteration via .iter().map().collect(), and format_ident! for identifier construction. https://claude.ai/code/session_01Tppkab4eLsL21asHGjQJoF
22 lines
646 B
Plaintext
22 lines
646 B
Plaintext
macro derive_builder! {
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struct $name:ident { $($field:ident : $ty:ty),* } => {
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@{
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let builder_name = format_ident!("{}_Builder", name.to_string());
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}
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T~{
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pub struct ${ builder_name } {
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for field in $fields =>
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pub $field.name: Option<$field.ty>,
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}
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impl ${ builder_name } {
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pub fn build(self) -> $name {
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$name {
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for field in $fields =>
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$field.name: self.$field.name.unwrap(),
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}
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}
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}
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}
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}
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}
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