Begin writing GUI

Cargo.toml

@@ -45,6 +45,19 @@ tracing-error = "0.2.0"
 tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 tree-sitter = "0.20.10"
 tui-textarea = { version = "0.4.0", features = ["search"] }
+egui = "0.24.1"
+eframe = { version = "0.24.1", default-features = false, features = [
+    "default_fonts", # Embed the default egui fonts.
+    "glow",          # Use the glow rendering backend. Alternative: "wgpu".
+    "persistence",   # Enable restoring app state when restarting the app.
+] }
+log = "0.4"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+env_logger = "0.10"
+
+[target.'cfg(target_arch = "wasm32")'.dependencies]
+wasm-bindgen-futures = "0.4"
 
 [build-dependencies]
 cc = "1.0"

src/abstract_tree/assignment.rs

@@ -46,8 +46,8 @@ impl AbstractTree for Assignment {
             "-=" => AssignmentOperator::MinusEqual,
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "=, += or -=",
+                    expected: "=, += or -=".to_string(),
-                    actual: operator_node.kind(),
+                    actual: operator_node.kind().to_string(),
                     location: operator_node.start_position(),
                     relevant_source: source[operator_node.byte_range()].to_string(),
                 })

src/abstract_tree/expression.rs

@@ -53,8 +53,9 @@ impl AbstractTree for Expression {
             }
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "value_node, identifier, index, math, logic, function_call or yield",
+                    expected: "value_node, identifier, index, math, logic, function_call or yield"
-                    actual: child.kind(),
+                        .to_string(),
+                    actual: child.kind().to_string(),
                     location: child.start_position(),
                     relevant_source: source[child.byte_range()].to_string(),
                 })

src/abstract_tree/for.rs

@@ -23,8 +23,8 @@ impl AbstractTree for For {
             "async for" => true,
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "for or async for",
+                    expected: "for or async for".to_string(),
-                    actual: for_node.kind(),
+                    actual: for_node.kind().to_string(),
                     location: for_node.start_position(),
                     relevant_source: source[for_node.byte_range()].to_string(),
                 })

src/abstract_tree/function_expression.rs

@@ -37,8 +37,8 @@ impl AbstractTree for FunctionExpression {
             )?)),
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "identifier, function call, value or index",
+                    expected: "identifier, function call, value or index".to_string(),
-                    actual: child.kind(),
+                    actual: child.kind().to_string(),
                     location: child.start_position(),
                     relevant_source: source[child.byte_range()].to_string(),
                 })

src/abstract_tree/index_assignment.rs

@@ -31,8 +31,8 @@ impl AbstractTree for IndexAssignment {
             "-=" => AssignmentOperator::MinusEqual,
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "=, += or -=",
+                    expected: "=, += or -=".to_string(),
-                    actual: operator_node.kind(),
+                    actual: operator_node.kind().to_string(),
                     location: operator_node.start_position(),
                     relevant_source: source[operator_node.byte_range()].to_string(),
                 })

src/abstract_tree/logic.rs

@@ -43,8 +43,8 @@ impl AbstractTree for Logic {
             "<=" => LogicOperator::LessOrEqaul,
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "==, !=, &&, ||, >, <, >= or <=",
+                    expected: "==, !=, &&, ||, >, <, >= or <=".to_string(),
-                    actual: operator_node.kind(),
+                    actual: operator_node.kind().to_string(),
                     location: operator_node.start_position(),
                     relevant_source: source[operator_node.byte_range()].to_string(),
                 })

src/abstract_tree/math.rs

@@ -30,8 +30,8 @@ impl AbstractTree for Math {
             "%" => MathOperator::Modulo,
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "+, -, *, / or %",
+                    expected: "+, -, *, / or %".to_string(),
-                    actual: operator_node.kind(),
+                    actual: operator_node.kind().to_string(),
                     location: operator_node.start_position(),
                     relevant_source: source[operator_node.byte_range()].to_string(),
                 })

src/abstract_tree/statement.rs

@@ -66,8 +66,8 @@ impl AbstractTree for Statement {
             )?)),
             _ => Err(Error::UnexpectedSyntaxNode {
                 expected:
-                    "assignment, expression, block, return, if...else, while, for, index_assignment or match",
+                    "assignment, expression, block, return, if...else, while, for, index_assignment or match".to_string(),
-                actual: child.kind(),
+                actual: child.kind().to_string(),
                 location: child.start_position(),
                 relevant_source: source[child.byte_range()].to_string(),
             }),

src/abstract_tree/type_definition.rs

@@ -203,8 +203,9 @@ impl AbstractTree for Type {
             }
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "any, bool, float, function, int, list, map, num, str or option",
+                    expected: "any, bool, float, function, int, list, map, num, str or option"
-                    actual: type_node.kind(),
+                        .to_string(),
+                    actual: type_node.kind().to_string(),
                     location: type_node.start_position(),
                     relevant_source: source[type_node.byte_range()].to_string(),
                 })

src/abstract_tree/value_node.rs

@@ -148,8 +148,8 @@ impl AbstractTree for ValueNode {
             }
             _ => {
                 return Err(Error::UnexpectedSyntaxNode {
-                    expected: "string, integer, float, boolean, list, map, or option",
+                    expected: "string, integer, float, boolean, list, map, or option".to_string(),
-                    actual: child.kind(),
+                    actual: child.kind().to_string(),
                     location: child.start_position(),
                     relevant_source: source[child.byte_range()].to_string(),
                 })

src/bin/gui/app.rs

@@ -0,0 +1,71 @@
+use dust_lang::{interpret, Result, Value};
+use serde::{Deserialize, Serialize};
+
+#[derive(Deserialize, Serialize)]
+pub struct App {
+    source: String,
+    output: Result<Value>,
+}
+
+impl App {
+    pub fn new(cc: &eframe::CreationContext<'_>, source: String) -> Self {
+        // This is also where you can customize the look and feel of egui using
+        // `cc.egui_ctx.set_visuals` and `cc.egui_ctx.set_fonts`.
+
+        cc.egui_ctx.set_zoom_factor(1.5);
+
+        let app = App {
+            source,
+            output: Ok(Value::default()),
+        };
+
+        if let Some(storage) = cc.storage {
+            return eframe::get_value(storage, eframe::APP_KEY).unwrap_or(app);
+        } else {
+            app
+        }
+    }
+}
+
+impl eframe::App for App {
+    /// Called by the frame work to save state before shutdown.
+    fn save(&mut self, storage: &mut dyn eframe::Storage) {
+        eframe::set_value(storage, eframe::APP_KEY, self);
+    }
+
+    /// Called each time the UI needs repainting, which may be many times per second.
+    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
+        egui::TopBottomPanel::top("top_panel").show(ctx, |ui| {
+            egui::menu::bar(ui, |ui| {
+                if ui.button("Quit").clicked() {
+                    ctx.send_viewport_cmd(egui::ViewportCommand::Close);
+                }
+                ui.add_space(16.0);
+
+                egui::widgets::global_dark_light_mode_buttons(ui);
+            });
+        });
+
+        egui::CentralPanel::default().show(ctx, |ui| {
+            ui.code_editor(&mut self.source);
+
+            if ui.button("run").clicked() {
+                self.output = interpret(&self.source);
+            }
+
+            ui.separator();
+
+            let output_text = match &self.output {
+                Ok(value) => value.to_string(),
+                Err(error) => error.to_string(),
+            };
+
+            ui.label(output_text);
+
+            ui.with_layout(egui::Layout::bottom_up(egui::Align::LEFT), |ui| {
+                egui::warn_if_debug_build(ui);
+                ui.hyperlink_to("source code", "https://git.jeffa.io/jeff/dust");
+            });
+        });
+    }
+}

src/bin/gui/main.rs

@@ -0,0 +1,32 @@
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use std::{fs::read_to_string, path::PathBuf};
+
+use clap::Parser;
+
+mod app;
+
+#[derive(Parser)]
+struct Args {
+    // Path to the file to read.
+    path: PathBuf,
+}
+
+fn main() -> eframe::Result<()> {
+    env_logger::init();
+
+    let path = Args::parse().path;
+    let source = read_to_string(&path).unwrap();
+    let native_options = eframe::NativeOptions {
+        viewport: egui::ViewportBuilder::default()
+            .with_inner_size([400.0, 300.0])
+            .with_min_inner_size([300.0, 220.0]),
+        ..Default::default()
+    };
+
+    eframe::run_native(
+        "Dust GUI",
+        native_options,
+        Box::new(|cc| Box::new(app::App::new(cc, source))),
+    )
+}

src/error.rs

@@ -3,6 +3,7 @@
 //! To deal with errors from dependencies, either create a new error variant
 //! or use the ToolFailure variant if the error can only occur inside a tool.
 
+use serde::{Deserialize, Serialize};
 use tree_sitter::{LanguageError, Node, Point};
 
 use crate::{value::Value, BuiltInFunction, Type};
@@ -18,17 +19,19 @@ use std::{
 
 pub type Result<T> = std::result::Result<T, Error>;
 
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Serialize, Deserialize)]
 pub enum Error {
     WithContext {
         error: Box<Error>,
+        #[serde(skip)]
         location: Point,
         source: String,
     },
 
     UnexpectedSyntaxNode {
-        expected: &'static str,
+        expected: String,
-        actual: &'static str,
+        actual: String,
+        #[serde(skip)]
         location: Point,
         relevant_source: String,
     },
@@ -61,7 +64,7 @@ pub enum Error {
 
     /// A function was called with the wrong amount of arguments.
     ExpectedBuiltInFunctionArgumentAmount {
-        function_name: &'static str,
+        function_name: String,
         expected: usize,
         actual: usize,
     },
@@ -160,6 +163,7 @@ pub enum Error {
     /// Invalid user input.
     Syntax {
         source: String,
+        #[serde(skip)]
         location: Point,
     },
 
@@ -177,7 +181,7 @@ impl Error {
         }
     }
 
-    pub fn expect_syntax_node(source: &str, expected: &'static str, actual: Node) -> Result<()> {
+    pub fn expect_syntax_node(source: &str, expected: &str, actual: Node) -> Result<()> {
         if expected == actual.kind() {
             Ok(())
         } else if actual.is_error() {
@@ -187,8 +191,8 @@ impl Error {
             })
         } else {
             Err(Error::UnexpectedSyntaxNode {
-                expected,
+                expected: expected.to_string(),
-                actual: actual.kind(),
+                actual: actual.kind().to_string(),
                 location: actual.start_position(),
                 relevant_source: source[actual.byte_range()].to_string(),
             })
@@ -204,7 +208,7 @@ impl Error {
             Ok(())
         } else {
             Err(Error::ExpectedBuiltInFunctionArgumentAmount {
-                function_name: function.name(),
+                function_name: function.name().to_string(),
                 expected,
                 actual,
             })

tree-sitter-dust/highlights.scm

@@ -1,6 +1,6 @@
 (expression) @expression
 (value) @value
-(identifier) @identifier
+(identifier) @variable
 (value) @value
 (string) @string
 
@@ -14,7 +14,7 @@
 (boolean) @boolean
 (list) @list
 
-"," @punctuation.delimiter
+["," ":" ";"] @punctuation.delimiter
 
 [
       "["
@@ -28,25 +28,22 @@
 ] @punctuation.bracket
 
 [
-      (assignment_operator)
+      (type)
-      (logic_operator)
+      (type_definition)
-      (math_operator)
+] @type
-] @operator
+
+(assignment_operator) @operator.assignment
+(logic_operator) @operator.logic
+(math_operator) @operator.math
 
 [
-      "any"
       "async"
       "else"
       "false"
-      "float"
       "for"
       "if"
       "in"
-      "int"
-      "map"
       "match"
-      "num"
-      "str"
       "true"
       "while"
       "->"
@@ -54,3 +51,4 @@
 ] @keyword
 
 (built_in_function) @function.builtin
+(function_call) @function.call