63 lines
1.4 KiB
Rust
63 lines
1.4 KiB
Rust
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pub mod ast;
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pub mod error;
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pub mod interpreter;
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pub mod lexer;
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use interpreter::ast_walker::Interpret;
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use interpreter::types::Value;
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use lexer::Lexer;
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pub fn run(code: &str) -> Result<Value, run::Error> {
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let mut lexer = Lexer::new(code, None);
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let tokens = lexer.scan_tokens()?;
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let mut parser = crate::ast::parser::Parser::new(tokens.into_iter());
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let expressions = parser.scan_expressions()?;
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Ok(expressions[0].interpret()?)
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}
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mod run {
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use std::fmt::Display;
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use super::ast;
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use super::interpreter::ast_walker::RuntimeError;
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use super::lexer;
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use from_variants::FromVariants;
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#[derive(Debug, FromVariants)]
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pub enum Error {
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Lexing(Vec<lexer::LexingError>),
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ASTParsing(Vec<ast::parser::ASTParsingError>),
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Runtime(RuntimeError),
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}
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impl Display for Error {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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let error_kind = match *self {
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Error::Lexing(_) => "lexing",
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Error::ASTParsing(_) => "ast generation",
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Error::Runtime(_) => "runtime",
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};
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write!(f, "Errors occured during {error_kind}\n")?;
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match *self {
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Error::Lexing(ref errors) => {
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for error in errors {
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write!(f, "{error} \n")?;
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}
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}
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Error::ASTParsing(ref errors) => {
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for error in errors {
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write!(f, "{error} \n")?;
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}
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}
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Error::Runtime(ref error) => write!(f, "{error} \n")?,
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};
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Ok(())
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}
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}
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impl std::error::Error for Error {}
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}
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