phpast: output as json

phpast/Cargo.toml

@@ -4,6 +4,8 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
+serde = "1.0.139"
+serde_json = "1.0.82"
 structopt = { version = "0.3.26", features = ["color"]  }
 trunk_lexer = { path = "../trunk_lexer" }
 trunk_parser = { path = "../trunk_parser" }

phpast/src/main.rs

@@ -1,4 +1,5 @@
 use std::{path::PathBuf, process::exit};
+use serde_json::to_string;
 use structopt::StructOpt;
 use trunk_lexer::Lexer;
 use trunk_parser::Parser;
@@ -8,6 +9,9 @@ use trunk_parser::Parser;
 struct Args {
     #[structopt(parse(from_os_str), help = "The input file to use.")]
     file: PathBuf,
+
+    #[structopt(short, long, help = "Output the abstract syntax tree as JSON.")]
+    json: bool,
 }
 
 fn main() {
@@ -33,5 +37,15 @@ fn main() {
         },
     };
 
-    println!("{:#?}", ast);    
+    if args.json {
+        match to_string(&ast) {
+            Ok(json) => println!("{}", json),
+            Err(e) => {
+                eprintln!("Failed to generate JSON, error: {}", e);
+                exit(1);
+            }
+        };
+    } else {
+        println!("{:#?}", ast);
+    }
 }

trunk_parser/Cargo.toml

@@ -6,7 +6,9 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+serde = { version = "1.0.139", features = ["derive"] }
+serde_json = "1.0.82"
 trunk_lexer = { path = "../trunk_lexer" }
 
 [lib]
-doctest = false
+doctest = false

trunk_parser/src/ast.rs

@@ -1,9 +1,10 @@
+use serde::Serialize;
 use trunk_lexer::TokenKind;
 
 pub type Block = Vec<Statement>;
 pub type Program = Block;
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Serialize)]
 pub struct Identifier {
     name: String,
 }
@@ -20,7 +21,7 @@ impl From<&String> for Identifier {
     }
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Serialize)]
 pub struct Param {
     name: Expression,
 }
@@ -43,7 +44,7 @@ impl From<&str> for Param {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize)]
 pub enum MethodFlag {
     Public,
     Protected,
@@ -51,7 +52,7 @@ pub enum MethodFlag {
     Static,
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Serialize)]
 pub enum Statement {
     InlineHtml(String),
     Var {
@@ -92,7 +93,7 @@ pub enum Statement {
     }
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Serialize)]
 pub enum Expression {
     Int(i64),
     Variable(String),
@@ -103,13 +104,13 @@ pub enum Expression {
     Array(Vec<ArrayItem>),
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Clone, PartialEq, Serialize)]
 pub struct ArrayItem {
     pub key: Option<Expression>,
     pub value: Expression,
 }
 
-#[derive(Debug, PartialEq, Clone)]
+#[derive(Debug, PartialEq, Clone, Serialize)]
 pub enum InfixOp {
     Add,
     Sub,