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Borrow some tricks from inline_python, now we got true interoperability
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,10 +1,9 @@ | ||
| fn main() | ||
| { | ||
| fn main() { | ||
| cxx_build::bridge("src/lib.rs") | ||
| .cpp(true) | ||
| .file("src/vbs.cpp") | ||
| .compile("inline-vbs-backend"); | ||
| println!("cargo:rerun-if-changed=src/lib.rs"); | ||
| println!("cargo:rerun-if-changed=src/vbs.cpp"); | ||
| println!("cargo:rerun-if-changed=include/vbs.h"); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,45 +1,202 @@ | ||
| mod reconstruct; | ||
| /* | ||
| Includes bits of code from the great & almighty Mara Bos and her amazing inline-python project. | ||
| Copyright (c) 2019-2020 Drones for Work B.V. and contributors | ||
| All rights reserved. | ||
| Redistribution and use in source and binary forms, with or without | ||
| modification, are permitted provided that the following conditions are met: | ||
| 1. Redistributions of source code must retain the above copyright notice, this | ||
| list of conditions and the following disclaimer. | ||
| 2. Redistributions in binary form must reproduce the above copyright notice, | ||
| this list of conditions and the following disclaimer in the documentation | ||
| and/or other materials provided with the distribution. | ||
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | ||
| ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | ||
| WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | ||
| DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | ||
| ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | ||
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | ||
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | ||
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | ||
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
| */ | ||
|
|
||
| #![feature(proc_macro_span)] | ||
|
|
||
| use litrs::StringLit; | ||
| use proc_macro::LineColumn; | ||
| use proc_macro::Span; | ||
| use proc_macro2::TokenStream; | ||
| use proc_macro2::{Delimiter, Ident, Spacing, TokenTree}; | ||
| use quote::quote; | ||
| use crate::reconstruct::reconstruct; | ||
| use quote::quote_spanned; | ||
| use std::collections::BTreeMap; | ||
| use std::fmt::Write; | ||
|
|
||
| extern crate proc_macro; | ||
|
|
||
| #[proc_macro] | ||
| pub fn vbs(input: proc_macro::TokenStream) -> proc_macro::TokenStream | ||
| { | ||
| let code = reconstruct(TokenStream::from(input)); | ||
| fn macro_impl(input: TokenStream) -> Result<TokenStream, TokenStream> { | ||
| let mut x = EmbedVbs::new(); | ||
|
|
||
| quote! [::inline_vbs::run_code(#code)].into() | ||
| x.add(input)?; | ||
|
|
||
| let EmbedVbs { | ||
| code, variables, .. | ||
| } = x; | ||
|
|
||
| let varname = variables.keys(); | ||
| let var = variables.values(); | ||
|
|
||
| Ok(quote! { | ||
| { | ||
| #(::inline_vbs::set_variable(#varname, #var).unwrap();)* | ||
| ::inline_vbs::Runner::run_code(#code) | ||
| } | ||
| }) | ||
| } | ||
|
|
||
| #[proc_macro] | ||
| pub fn vbs_(input: proc_macro::TokenStream) -> proc_macro::TokenStream | ||
| { | ||
| let code = reconstruct(TokenStream::from(input)); | ||
| pub fn vbs(input: proc_macro::TokenStream) -> proc_macro::TokenStream { | ||
| proc_macro::TokenStream::from(process_tokens(input)) | ||
| } | ||
|
|
||
| fn process_tokens(input: proc_macro::TokenStream) -> TokenStream { | ||
| match macro_impl(TokenStream::from(input)) { | ||
| Ok(tokens) => tokens, | ||
| Err(tokens) => tokens, | ||
| } | ||
| } | ||
|
|
||
| quote! [::inline_vbs::run_expr(#code)].into() | ||
| #[proc_macro] | ||
| pub fn vbs_(input: proc_macro::TokenStream) -> proc_macro::TokenStream { | ||
| let call = process_tokens(input); | ||
| (quote! { | ||
| { | ||
| let res: Variant = #call; | ||
| res | ||
| } | ||
| }) | ||
| .into() | ||
| } | ||
|
|
||
| #[proc_macro] | ||
| pub fn vbs_raw(input: proc_macro::TokenStream) -> proc_macro::TokenStream | ||
| { | ||
| pub fn vbs_raw(input: proc_macro::TokenStream) -> proc_macro::TokenStream { | ||
| let input = input.into_iter().collect::<Vec<_>>(); | ||
|
|
||
| if input.len() != 1 | ||
| { | ||
| if input.len() != 1 { | ||
| let msg = format!("expected exactly one input token, got {}", input.len()); | ||
| return quote! { compile_error!(#msg) }.into(); | ||
| } | ||
|
|
||
| let string_lit = match StringLit::try_from(&input[0]) | ||
| { | ||
| let string_lit = match StringLit::try_from(&input[0]) { | ||
| Err(e) => return e.to_compile_error(), | ||
| Ok(lit) => lit, | ||
| }; | ||
|
|
||
| let code = string_lit.value(); | ||
|
|
||
| quote! [::inline_vbs::run_code(#code)].into() | ||
| } | ||
| } | ||
|
|
||
| struct EmbedVbs { | ||
| pub code: String, | ||
| pub variables: BTreeMap<String, Ident>, | ||
| pub first_indent: Option<usize>, | ||
| pub loc: LineColumn, | ||
| } | ||
|
|
||
| impl EmbedVbs { | ||
| pub fn new() -> Self { | ||
| Self { | ||
| code: String::new(), | ||
| variables: BTreeMap::new(), | ||
| loc: LineColumn { line: 1, column: 0 }, | ||
| first_indent: None, | ||
| } | ||
| } | ||
|
|
||
| fn add_whitespace(&mut self, span: Span, loc: LineColumn) -> Result<(), TokenStream> { | ||
| #[allow(clippy::comparison_chain)] | ||
| if loc.line > self.loc.line { | ||
| while loc.line > self.loc.line { | ||
| self.code.push('\n'); | ||
| self.loc.line += 1; | ||
| } | ||
| let first_indent = *self.first_indent.get_or_insert(loc.column); | ||
| let indent = loc.column.checked_sub(first_indent); | ||
| let indent = indent.ok_or_else( | ||
| || quote_spanned!(span.into() => compile_error!{"Invalid indentation"}), | ||
| )?; | ||
| for _ in 0..indent { | ||
| self.code.push(' '); | ||
| } | ||
| self.loc.column = loc.column; | ||
| } else if loc.line == self.loc.line { | ||
| while loc.column > self.loc.column { | ||
| self.code.push(' '); | ||
| self.loc.column += 1; | ||
| } | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
|
|
||
| pub fn add(&mut self, input: TokenStream) -> Result<(), TokenStream> { | ||
| let mut tokens = input.into_iter(); | ||
|
|
||
| while let Some(token) = tokens.next() { | ||
| let span = token.span().unwrap(); | ||
| self.add_whitespace(span, span.start())?; | ||
|
|
||
| match &token { | ||
| TokenTree::Group(x) => { | ||
| let (start, end) = match x.delimiter() { | ||
| Delimiter::Parenthesis => ("(", ")"), | ||
| Delimiter::Brace => ("{", "}"), | ||
| Delimiter::Bracket => ("[", "]"), | ||
| Delimiter::None => ("", ""), | ||
| }; | ||
| self.code.push_str(start); | ||
| self.loc.column += start.len(); | ||
| self.add(x.stream())?; | ||
| let mut end_loc = token.span().unwrap().end(); | ||
| end_loc.column = end_loc.column.saturating_sub(end.len()); | ||
| self.add_whitespace(span, end_loc)?; | ||
| self.code.push_str(end); | ||
| self.loc.column += end.len(); | ||
| } | ||
| TokenTree::Punct(x) => { | ||
| if x.as_char() == '\'' && x.spacing() == Spacing::Joint { | ||
| let name = if let Some(TokenTree::Ident(name)) = tokens.next() { | ||
| name | ||
| } else { | ||
| unreachable!() | ||
| }; | ||
| let name_str = format!("RUST{}", name); | ||
| self.code.push_str(&name_str); | ||
| self.loc.column += name_str.chars().count() - 4 + 1; | ||
| self.variables.entry(name_str).or_insert(name); | ||
| } else { | ||
| self.code.push(x.as_char()); | ||
| self.loc.column += 1; | ||
| } | ||
| } | ||
| TokenTree::Ident(x) => { | ||
| write!(&mut self.code, "{}", x).unwrap(); | ||
| self.loc = token.span().unwrap().end(); | ||
| } | ||
| TokenTree::Literal(x) => { | ||
| let s = x.to_string(); | ||
| self.code += &s; | ||
| self.loc = token.span().unwrap().end(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| Ok(()) | ||
| } | ||
| } |
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