pub fn load_str(
source: &str,
d: Arc<String>,
module: &mut Module
) -> Result<(), String>Expand description
Loads a source from string.
- source - The name of source file
- d - The data of source file
- module - The module to load the source
Examples found in repository?
examples/call.rs (lines 22-52)
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fn main() {
let mut module = Module::new();
// Add functions to read `a` and `b` from `RustArgs`.
module.add(
Arc::new("a_of".into()),
a_of,
Dfn::nl(vec![Type::Any], Type::F64),
);
module.add(
Arc::new("b_of".into()),
b_of,
Dfn::nl(vec![Type::Any], Type::F64),
);
error(load_str(
"main.dyon",
Arc::new(
r#"
fn add_args(a: f64, b: f64) {
println("add_args:")
println(link {a" + "b" = "a + b})
}
fn add_obj(obj: {}) {
println("add_obj:")
println(link {obj.a" + "obj.b" = "obj.a + obj.b})
}
fn add_rust(obj: any) {
println("add_rust")
a := a_of(obj)
b := b_of(obj)
println(link {a" + "b" = "a + b})
}
add(a, b) = a + b
create_vec(a, b) = (a, b)
id(obj) = clone(obj)
"#
.into(),
),
&mut module,
));
let ref module = Arc::new(module);
let a = 20.0;
let b = 30.0;
// Call with multiple arguments.
let call = Call::new("add_args").arg(a).arg(b);
error(call.run(&mut Runtime::new(), module));
// Call with object.
let call = Call::new("add_obj").arg(Args { a, b });
error(call.run(&mut Runtime::new(), module));
// Call with rust object.
let call = Call::new("add_rust").rust(RustArgs { a, b });
error(call.run(&mut Runtime::new(), module));
// Call function with return value.
let call = Call::new("add").arg(a).arg(b);
match call.run_ret::<f64>(&mut Runtime::new(), module) {
Ok(answer) => {
println!("{}", answer);
}
Err(err) => {
error(Err(err));
}
}
// Call function that returns vec4.
let call = Call::new("create_vec").arg(a).arg(b);
match call.run_vec4::<[f64; 2]>(&mut Runtime::new(), module) {
Ok(answer) => {
println!("{:?}", answer);
}
Err(err) => {
error(Err(err));
}
}
// Call function that returns Rust object.
let call = Call::new("id").rust(RustArgs { a, b });
match call.run_ret::<RustObject>(&mut Runtime::new(), module) {
Ok(answer) => {
println!("{:?}", answer.lock().unwrap().downcast_ref::<RustArgs>());
}
Err(err) => {
error(Err(err));
}
}
}More examples
examples/dyon.rs (line 151)
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fn main() {
let mut file: Option<String> = None;
let mut imports: Vec<Module> = vec![];
let mut module = Module::new();
let mut ctx = String::new();
println!("=== Dyon 0.49 ===");
println!("Type `help` for more information.");
loop {
if let Some(x) = file.as_ref() {
print!("({}) ", x);
}
print!("> ");
let _ = std::io::stdout().flush();
let mut input = String::new();
std::io::stdin().read_line(&mut input).expect("Expected input");
let command = input.trim().to_string();
if command == "\\" {
input = String::new();
let mut empty_lines = 0;
loop {
let mut line = String::new();
std::io::stdin().read_line(&mut line).expect("Expected input");
if line.trim() == "" {
empty_lines += 1;
if empty_lines >= 2 {break}
} else {
if empty_lines > 0 {input.push_str("\n")}
empty_lines = 0;
input.push_str(&line);
}
}
}
match &*command {
"bye" => break,
"ctx" => {
println!("{}", ctx);
continue;
}
"clear" => {
ctx = String::new();
module = Module::new();
file = None;
continue;
}
"help" => {
println!("{}", include_str!("../assets/repl/help.txt"));
continue;
}
"save" => {
if let Some(x) = file.as_ref() {
if std::fs::write(x, &ctx).is_err() {
println!("Saving failed.");
}
} else {
println!("Could not save.\nUse `save \"<file>\"`.");
}
continue;
}
_ if command.starts_with("save ") => {
let new_file = if let Some(x) = json_str(&command[5..]) {x}
else {
println!("Saving failed.");
continue;
};
if std::fs::write(&new_file, &ctx).is_err() {
println!("Saving failed.");
continue;
}
file = Some(new_file);
continue;
}
_ if command.starts_with("load ") => {
println!("Loading...");
let new_file = if let Some(x) = json_str(&command[5..]) {x}
else {
println!("Loading failed.");
continue;
};
println!(" {}", new_file);
ctx = match std::fs::read_to_string(&new_file) {
Ok(x) => x,
Err(_) => {
println!("Could not load {}", new_file);
continue;
}
};
file = Some(new_file);
if reload(&ctx, &mut module, &imports) {
continue;
}
println!("Done!");
continue;
}
_ if command.starts_with("import ") => {
println!("Importing...");
let file = if let Some(x) = json_str(&command[7..]) {x}
else {
println!("Import failed.");
continue;
};
println!(" {}", file);
let mut m = Module::new();
if error(load(&file, &mut m)) {
continue;
}
imports.push(m);
if reload(&ctx, &mut module, &imports) {
continue;
}
println!("Done!");
continue;
}
_ if command.starts_with("call ") => {
let f = if let Some(x) = json_str(&command[5..]) {x}
else {
println!("Could not call function.");
continue;
};
input = format!("{{\n{}()\nreturn\n}}\n", f);
}
"" => {
// Print separator for readability.
print!("\n------------------------------------<o=o");
println!("o=o>------------------------------------\n");
continue;
}
_ => {}
}
let mut sub_module = Module::new();
sub_module.import(&module);
let res = load_str("dyonrepl", Arc::new(input.clone()), &mut sub_module);
if res.is_err() {
// Try evaluation expression.
let code = format!("fn main() {{println({})}}", input);
if error(run_str_with_module("dyonrepl", Arc::new(code), &module)) {
error(res);
}
} else {
println!("{}", input);
ctx.push_str(&input);
if reload(&ctx, &mut module, &imports) {
continue;
}
}
}
}
fn reload(ctx: &str, module: &mut Module, imports: &[Module]) -> bool {
let mut new_module = Module::new();
for m in imports {new_module.import(m)};
if !error(load_str("dyonrep", Arc::new(ctx.into()), &mut new_module)) {
*module = new_module;
false
} else {true}
}
fn run_str_with_module(
source: &str,
d: Arc<String>,
module: &Module,
) -> Result<(), String> {
let mut m = Module::new();
m.import(module);
load_str(source, d, &mut m)?;
let mut runtime = Runtime::new();
runtime.run(&Arc::new(m))?;
Ok(())
}