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JavaScript foreign function interface working

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Garen Tyler 2020-12-10 21:53:34 -07:00
parent fb1d42d910
commit ad0e6843b7
8 changed files with 119 additions and 556 deletions
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package-lock.json generated
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"readable-stream": "^2.3.0",
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} }

2
package.json
View File

@ -4,7 +4,7 @@
"description": "Pivot is a new programming language built with Rust by Garen Tyler. Pivot is currently in the alpha stage of development.", "description": "Pivot is a new programming language built with Rust by Garen Tyler. Pivot is currently in the alpha stage of development.",
"main": "test.js", "main": "test.js",
"dependencies": { "dependencies": {
"webassembly": "^0.11.0" "wasi": "0.0.6"
}, },
"devDependencies": {}, "devDependencies": {},
"scripts": { "scripts": {

12
src/ast.rs
View File

@ -26,6 +26,8 @@ pub enum AstNodeKind {
VariableDefinition, VariableDefinition,
VariableDeclaration, VariableDeclaration,
Assign, Assign,
// Import
Import,
// Blank node // Blank node
Null, Null,
} }
@ -191,6 +193,16 @@ impl AstNode {
subnodes: vec![value], subnodes: vec![value],
} }
} }
// Import
pub fn import(num_args: AstNode, returns_value: AstNode, mut fn_path: Vec<AstNode>) -> AstNode {
let mut data = vec![num_args, returns_value];
data.append(&mut fn_path);
AstNode {
kind: AstNodeKind::Import,
value: "import".into(),
subnodes: data,
}
}
// Blank node // Blank node
pub fn null() -> AstNode { pub fn null() -> AstNode {
AstNode { AstNode {

24
src/codegen.rs
View File

@ -154,6 +154,30 @@ impl Wasm for AstNode {
} }
VariableDeclaration => format!("(local ${} i32)", self.value), VariableDeclaration => format!("(local ${} i32)", self.value),
Assign => format!("(set_local ${} {})", self.value, self.subnodes[0].emit(s)), Assign => format!("(set_local ${} {})", self.value, self.subnodes[0].emit(s)),
// Import
Import => {
r#"(import "console" "log" (func $log (param i32)))"#.into()
// let mut out = String::new();
// out += "(import";
// let num_args = self.subnodes[0].clone().value.parse::<u32>().unwrap();
// let returns_value = self.subnodes[1].clone().value.parse::<u32>().unwrap() > 0;
// // (import "console" "log" (func $log (param i32)))
// out += &format!(" \"{}\"", self.subnodes[2].value.clone());
// let mut combined_name = self.subnodes[2].value.clone();
// for path in self.subnodes[3..].iter() {
// out += &format!(" \"{}\"", path.value.clone());
// combined_name += &format!("_{}", path.value.clone());
// }
// out += &format!(" (func ${}", combined_name);
// for _ in 0..num_args {
// out += " (param i32)";
// }
// if returns_value {
// out += " (result i32)";
// }
// out += "))";
// out
}
// Blank node / other // Blank node / other
Null | _ => "".into(), Null | _ => "".into(),
} }

6
src/lib.rs
View File

@ -12,5 +12,9 @@ pub fn compile<T: Into<String>>(src: T) -> Vec<u8> {
pub fn compile_wat<T: Into<String>>(src: T) -> String { pub fn compile_wat<T: Into<String>>(src: T) -> String {
let mut s = SymbolGenerator::new(); let mut s = SymbolGenerator::new();
parse::parse(src).emit(&mut s) let ast = parse::parse(src);
println!("{}", ast);
let wasm = ast.emit(&mut s);
println!("{}", wasm);
wasm
} }

47
src/parse/mod.rs
View File

@ -45,13 +45,53 @@ fn parse_statement(src: String) -> Result<(String, String), String> {
let right_brace = token(r"[}]"); let right_brace = token(r"[}]");
let while_token = token(r"while\b"); let while_token = token(r"while\b");
let var = token(r"var\b"); let var = token(r"var\b");
let number = token(r"[0-9]+").map(|matched| {
Ok(to_string(&AstNode::integer(
matched.parse::<i64>().unwrap(),
))?)
});
let identifier = token(r"[a-zA-Z_][a-zA-Z0-9_]*") let identifier = token(r"[a-zA-Z_][a-zA-Z0-9_]*")
.map(|matched| Ok(to_string(&AstNode::identifier(matched))?)); .map(|matched| Ok(to_string(&AstNode::identifier(matched))?));
let assign = let assign =
token(r"=").map(|_matched| Ok(to_string(&AstNode::assign("".into(), AstNode::null()))?)); token(r"=").map(|_matched| Ok(to_string(&AstNode::assign("".into(), AstNode::null()))?));
let comma = token(r"[,]"); let comma = token(r"[,]");
let period = token(r"[.]");
let expression = Parser::custom(parse_expression); let expression = Parser::custom(parse_expression);
let statement = Parser::custom(parse_statement); let statement = Parser::custom(parse_statement);
let import = token(r"import\b");
// Statement parsers.
let import_statement = import
.clone()
.ignore()
.and(identifier.clone())
.and(
period
.clone()
.ignore()
.and(identifier.clone())
.repeat_range(0..usize::MAX),
)
.and(number.clone())
.and(number.clone())
.and(semicolon.clone().ignore())
.map(|matched| {
let data = from_str::<Vec<String>>(&matched)?;
let import_fn_returns_value = from_str::<AstNode>(&data[1])?;
let data = from_str::<Vec<String>>(&data[0])?;
let num_import_fn_args = from_str::<AstNode>(&data[1])?;
let data = from_str::<Vec<String>>(&data[0])?;
let mut import_fn_path = vec![];
import_fn_path.push(from_str::<AstNode>(&data[0])?);
let data = from_str::<Vec<String>>(&data[1])?;
for d in data {
import_fn_path.push(from_str::<AstNode>(&d)?);
}
Ok(to_string(&AstNode::import(
num_import_fn_args,
import_fn_returns_value,
import_fn_path,
))?)
});
let return_statement = return_token let return_statement = return_token
.clone() .clone()
.ignore() .ignore()
@ -216,6 +256,7 @@ fn parse_statement(src: String) -> Result<(String, String), String> {
}); });
return_statement return_statement
.clone() .clone()
.or(import_statement.clone())
.or(if_statement.clone()) .or(if_statement.clone())
.or(while_statement.clone()) .or(while_statement.clone())
.or(var_statement.clone()) .or(var_statement.clone())
@ -276,9 +317,8 @@ fn parse_expression(src: String) -> Result<(String, String), String> {
AstNode::null(), AstNode::null(),
))?) ))?)
}); });
// Expression parser. // Expression parsers.
let expression = Parser::custom(parse_expression); let expression = Parser::custom(parse_expression);
// Call parser.
let args = expression let args = expression
.clone() .clone()
.and( .and(
@ -316,7 +356,6 @@ fn parse_expression(src: String) -> Result<(String, String), String> {
} }
Ok(to_string(&AstNode::function_call(callee, ast_args))?) Ok(to_string(&AstNode::function_call(callee, ast_args))?)
}); });
// Atom parser.
let atom = call let atom = call
.clone() .clone()
.or(identifier.clone()) .or(identifier.clone())
@ -326,7 +365,6 @@ fn parse_expression(src: String) -> Result<(String, String), String> {
.ignore() .ignore()
.and(expression.clone()) .and(expression.clone())
.and(right_paren.clone().ignore())); .and(right_paren.clone().ignore()));
// Unary operator parsers.
let unary = not.clone().optional().and(atom.clone()).map(|matched| { let unary = not.clone().optional().and(atom.clone()).map(|matched| {
let data = from_str::<Vec<String>>(&matched)?; let data = from_str::<Vec<String>>(&matched)?;
let atom_data = from_str::<AstNode>(&data[1])?; let atom_data = from_str::<AstNode>(&data[1])?;
@ -335,7 +373,6 @@ fn parse_expression(src: String) -> Result<(String, String), String> {
_ => atom_data, _ => atom_data,
})?) })?)
}); });
// Infix operator parsers.
let infix = |operator_parser: Parser, term_parser: Parser| { let infix = |operator_parser: Parser, term_parser: Parser| {
term_parser term_parser
.clone() .clone()

26
test.js
View File

@ -1,5 +1,21 @@
require("webassembly") 'use strict';
.load("out.wasm") const fs = require('fs');
.then(module => { const WASI = require('wasi');
console.log("3 + 2 is " + module.exports.main()); const wasi = new WASI({
}); args: process.argv,
env: process.env,
preopens: {
'/sandbox': __dirname
}
});
const importObject = {
wasi_snapshot_preview1: wasi.wasiImport,
console,
};
(async () => {
const wasm = await WebAssembly.compile(fs.readFileSync('./out.wasm'));
const instance = await WebAssembly.instantiate(wasm, importObject);
instance.exports.main();
})();

5
test.pvt
View File

@ -1,5 +1,4 @@
import log 1 0;
function main() { function main() {
var num1 = 5; log(3);
var num2 = 4;
return num1 * num2;
} }