Echo Writes Code

render.rs

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use colored::*;

use std::io;

pub trait Render {
	fn render(&self, w: &mut dyn io::Write) -> io::Result<()> {
		self.render_indented(w, 0)
	}

	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()>;
}

impl Render for Vec<orchid::Token> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for t in self {
			t.render_indented(w, indentation)?;
		}

		Ok(())
	}
}

impl Render for orchid::Token {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::TokenKind::*;

		let indent = "| ".repeat(indentation);
		write!(w, "{indent}> ")?;

		match self.kind {
			Keyword(ref text) => write!(w, "keyword: {}", text.cyan()),
			Identifier(ref text) => write!(w, "identifier: {}", text.cyan()),
			StringLiteral(ref text) => write!(w, "string literal: {}", format!("\"{text}\"").cyan()),
			IntegerLiteral(ref text) => write!(w, "integer literal: {}", text.cyan()),
			FloatingPointLiteral(ref text) => write!(w, "floating point literal: {}", text.cyan()),
			Arrow => write!(w, "punctuation: {}", "->".cyan()),
			DoubleColon => write!(w, "punctuation: {}", "::".cyan()),
			Dot => write!(w, "punctuation: {}", ".".cyan()),
			Colon => write!(w, "punctuation: {}", ":".cyan()),
			Semicolon => write!(w, "punctuation: {}", ";".cyan()),
			LeftBrace => write!(w, "punctuation: {}", "{".cyan()),
			RightBrace => write!(w, "punctuation: {}", "}".cyan()),
			LeftBracket => write!(w, "punctuation: {}", "[".cyan()),
			RightBracket => write!(w, "punctuation: {}", "]".cyan()),
			LeftParenthesis => write!(w, "punctuation: {}", "(".cyan()),
			RightParenthesis => write!(w, "punctuation: {}", ")".cyan()),
			Equals => write!(w, "punctuation: {}", "=".cyan()),
			Percent => write!(w, "punctuation: {}", "%".cyan()),
			Plus => write!(w, "punctuation: {}", "+".cyan()),
			Star => write!(w, "punctuation: {}", "*".cyan()),
			Comma => write!(w, "punctuation: {}", ",".cyan()),
		}?;

		writeln!(w, " at {}", format!("line {}, byte {}", self.span.start.line, self.span.start.byte).magenta())
	}
}

impl Render for orchid::SyntaxTree {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		self.module.render_indented(w, indentation)
	}
}

impl Render for orchid::Module {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		writeln!(w, "module")?;
		self.statements.render_indented(w, indentation + 1)
	}
}

impl Render for Vec<orchid::Statement> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for statement in self {
			statement.render_indented(w, indentation)?;
		};

		Ok(())
	}
}

impl Render for orchid::Statement {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::Statement::*;

		let indent = "| ".repeat(indentation);

		match *self {
			Bind { ref binding, ref expression } => {
				writeln!(w, "{indent}> statement: {}", "bind!".yellow())?;
				binding.render_indented(w, indentation + 1)?;
				expression.render_indented(w, indentation + 1)?;
			},
			Exec { ref procedure, ref arguments } => {
				writeln!(w, "{indent}> statement: {}", "exec!".yellow())?;
				procedure.render_indented(w, indentation + 1)?;
				arguments.render_indented(w, indentation + 1)?;
			},
			Func { ref identifier, ref parameters, ref type_signature, ref statements } => {
				writeln!(w, "{indent}> statement: {}", "func!".yellow())?;
				identifier.render_indented(w, indentation + 1)?;
				parameters.render_indented(w, indentation + 1)?;
				type_signature.render_indented(w, indentation + 1)?;
				statements.render_indented(w, indentation + 1)?;
			},
			Proc { ref identifier, ref parameters, ref type_signature, ref statements } => {
				writeln!(w, "{indent}> statement: {}", "proc!".yellow())?;
				identifier.render_indented(w, indentation + 1)?;
				parameters.render_indented(w, indentation + 1)?;
				type_signature.render_indented(w, indentation + 1)?;
				statements.render_indented(w, indentation + 1)?;
			},
			Import { ref module, ref target } => {
				writeln!(w, "{indent}> statement: {}", "import!".yellow())?;
				module.render_indented(w, indentation + 1)?;
				target.render_indented(w, indentation + 1)?;
			},
			Main { ref statements } => {
				writeln!(w, "{indent}> statement: {}", "main!".yellow())?;
				statements.render_indented(w, indentation + 1)?;
			},
			Return { ref expression } => {
				writeln!(w, "{indent}> statement: {}", "return!".yellow())?;
				expression.render_indented(w, indentation + 1)?;
			},
			Todo { ref message } => {
				writeln!(w, "{indent}> statement: {}", "todo!".yellow())?;
				message.render_indented(w, indentation + 1)?;
			},
		};

		Ok(())
	}
}

impl Render for orchid::ImportTarget {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::ImportTarget::*;

		let indent = "| ".repeat(indentation);

		match *self {
			Unspecified => writeln!(w, "{indent}> import target: {}", "unspecified (implies self)".cyan()),
			Wildcard => writeln!(w, "{indent}> import target: {}", "wildcard".cyan()),
			ImportList(ref imports) => {
				writeln!(w, "{indent}> import target: {}", "import list".cyan())?;
				imports.render_indented(w, indentation + 1)
			},
		}
	}
}

impl Render for Vec<orchid::ImportListElement> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for e in self {
			e.render_indented(w, indentation)?;
		}

		Ok(())
	}
}

impl Render for orchid::ImportListElement {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::ImportListElement::*;

		let indent = "| ".repeat(indentation);

		match *self {
			ThisModule => writeln!(w, "{indent}> import list element: {}", "self".cyan()),
			Identifier(ref identifier) => {
				writeln!(w, "{indent}> import list element: {}", "identifier".cyan())?;
				identifier.render_indented(w, indentation + 1)
			}
		}
	}
}

impl Render for orchid::Binding {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> binding")?;
		self.bound_id.render_indented(w, indentation + 1)?;
		self.bound_type.render_indented(w, indentation + 1)?;
		Ok(())
	}
}

impl Render for Vec<orchid::Expression> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for expression in self {
			expression.render_indented(w, indentation)?;
		};

		Ok(())
	}
}

impl Render for orchid::Expression {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::Expression::*;

		let indent = "| ".repeat(indentation);

		match *self {
			Bin(ref digits) => {
				writeln!(w, "{indent}> {} expression", "bin!".yellow())?;
				digits.render_indented(w, indentation + 1)?;
			},
			Dec(ref digits) => {
				writeln!(w, "{indent}> {} expression", "dec!".yellow())?;
				digits.render_indented(w, indentation + 1)?;
			},
			FunctionApplication { ref function, ref arguments } => {
				writeln!(w, "{indent}> function application")?;
				function.render_indented(w, indentation + 1)?;
				arguments.render_indented(w, indentation + 1)?;
			},
			Hex(ref digits) => {
				writeln!(w, "{indent}> {} expression", "hex!".yellow())?;
				digits.render_indented(w, indentation + 1)?;
			},
			Oct(ref digits) => {
				writeln!(w, "{indent}> {} expression", "oct!".yellow())?;
				digits.render_indented(w, indentation + 1)?;
			},
			StringLiteral(ref literal) => {
				writeln!(w, "{indent}> string literal expression")?;
				literal.render_indented(w, indentation + 1)?;
			},
			IntegerLiteral(ref literal) => {
				writeln!(w, "{indent}> integer literal expression")?;
				literal.render_indented(w, indentation + 1)?;
			},
			FloatingPointLiteral(ref literal) => {
				writeln!(w, "{indent}> floating point literal expression")?;
				literal.render_indented(w, indentation + 1)?;
			},
			QualifiedIdentifier(ref qualified_id) => {
				writeln!(w, "{indent}> qualified identifier expression")?;
				qualified_id.render_indented(w, indentation + 1)?;
			},
		};

		Ok(())
	}
}

impl Render for Vec<orchid::Type> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for t in self {
			t.render_indented(w, indentation)?;
		};

		Ok(())
	}
}

impl Render for orchid::Type {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		use orchid::Type::*;

		let indent = "| ".repeat(indentation);

		match *self {
			Unspecified => {
				writeln!(w, "{indent}> unspecified type")?;
			},
			Concrete { ref id } => {
				writeln!(w, "{indent}> concrete type")?;
				id.render_indented(w, indentation + 1)?;
			},
			PolymorphicApplication { ref id, ref arguments } => {
				writeln!(w, "{indent}> template type")?;
				id.render_indented(w, indentation + 1)?;
				arguments.render_indented(w, indentation + 1)?;
			},
		};

		Ok(())
	}
}

impl Render for orchid::QualifiedIdentifier {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> qualified identifier")?;
		self.0.render_indented(w, indentation + 1)?;
		Ok(())
	}
}

impl Render for Vec<orchid::Identifier> {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		for i in self {
			i.render_indented(w, indentation)?;
		};

		Ok(())
	}
}

impl Render for orchid::Identifier {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> identifier: {}", self.0.cyan())?;
		Ok(())
	}
}

impl Render for orchid::IntegerLiteral {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> integer literal: {}", self.0.cyan())?;
		Ok(())
	}
}

impl Render for orchid::FloatingPointLiteral {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> floating point literal: {}", self.0.cyan())?;
		Ok(())
	}
}

impl Render for orchid::StringLiteral {
	fn render_indented(&self, w: &mut dyn io::Write, indentation: usize) -> io::Result<()> {
		let indent = "| ".repeat(indentation);
		writeln!(w, "{indent}> string literal: {}", format!("\"{}\"", self.0).cyan())?;
		Ok(())
	}
}