Some experimentation
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@ -4,6 +4,9 @@ version = "0.1.0"
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authors = ["greg <greg.shuflin@protonmail.com>"]
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[dependencies]
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quote = "0.5.2"
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syn = { version = "0.13.1", features = ["full"] }
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[lib]
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proc-macro = true
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@ -1,15 +1,71 @@
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#![feature(proc_macro)]
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extern crate proc_macro;
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#[macro_use]
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extern crate syn;
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#[macro_use]
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extern crate quote;
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use proc_macro::TokenStream;
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use syn::{Expr, Lit, ExprLit};
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use syn::punctuated::Punctuated;
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use syn::synom::Synom;
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fn tok() -> String {
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"ONE THING FROM A MACRO|".to_string()
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}
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fn pars() -> String {
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"ANOTHER MACRO THING|".to_string()
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}
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#[proc_macro]
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pub fn compiler_pass_sequence(input: TokenStream) -> TokenStream {
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r#"
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fn new_execute(&mut self, input: &str, _options: &EvalOptions) -> FinishedComputation {
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let mut evaluation = UnfinishedComputation::default();
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evaluation.output(Err("this comes at ye from the macro".to_string()))
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/*
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for token_tree in input {
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//println!("ITEM: {:?}", token_tree.kind);
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match token_tree.kind {
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TokenNode::Literal(l) => println!("{:?}", l),
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_ => ()
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}
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}
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"#.parse().unwrap()
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*/
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let mut contained_strings = Vec::new();
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let input: Expr = syn::parse(input).unwrap();
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match input {
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Expr::Array(array) => {
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for item in array.elems {
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if let Expr::Lit(ExprLit { lit: Lit::Str(s), ..}) = item {
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contained_strings.push(s.value());
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} else {
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panic!("BAD INPUT");
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}
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}
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},
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_ => panic!("BAD INPUT"),
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}
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let mut from_macro = String::new();
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for item in contained_strings {
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if item == "tok" {
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from_macro.push_str(tok().as_ref());
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}
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if item == "pars" {
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from_macro.push_str(pars().as_ref());
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}
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}
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let output = quote! {
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fn new_execute(&mut self, input: &str, _options: &EvalOptions) -> FinishedComputation {
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let mut evaluation = UnfinishedComputation::default();
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evaluation.output(Err(#from_macro.to_string()))
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}
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};
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output.into()
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}
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/* #[compiler_pass(<name of pass>*/
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@ -43,7 +43,7 @@ impl Schala {
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impl ProgrammingLanguageInterface for Schala {
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schala_codegen::compiler_pass_sequence!("tok", "pars", "exec");
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schala_codegen::compiler_pass_sequence!(["tok"]);
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fn get_language_name(&self) -> String {
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"Schala".to_string()
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