159 lines
3.2 KiB
Rust
159 lines
3.2 KiB
Rust
#![feature(box_patterns)]
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extern crate itertools;
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extern crate schala_repl;
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use itertools::Itertools;
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use schala_repl::{ProgrammingLanguageInterface, EvalOptions};
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pub struct Robo {
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}
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impl Robo {
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pub fn new() -> Robo {
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Robo { }
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}
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}
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#[derive(Debug)]
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pub struct TokenError {
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pub msg: String,
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}
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impl TokenError {
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pub fn new(msg: &str) -> TokenError {
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TokenError { msg: msg.to_string() }
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}
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}
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#[allow(dead_code)]
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#[derive(Debug)]
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pub enum Token {
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StrLiteral(String),
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Backtick,
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Newline,
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LParen,
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RParen,
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LBracket,
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RBracket,
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LBrace,
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RBrace,
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Period,
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Comma,
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Colon,
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Semicolon,
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SingleQuote,
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Identifier(String),
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Operator(String),
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NumLiteral(Number),
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}
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#[allow(dead_code)]
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#[derive(Debug)]
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pub enum Number {
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IntegerRep(String),
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FloatRep(String)
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}
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#[allow(dead_code)]
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pub type AST = Vec<ASTNode>;
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#[allow(dead_code)]
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#[derive(Debug)]
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pub enum ASTNode {
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FunctionDefinition(String, Expression),
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ImportStatement(String),
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}
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#[allow(dead_code)]
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#[derive(Debug)]
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pub enum Expression {
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}
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fn tokenize(input: &str) -> Result<Vec<Token>, TokenError> {
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use self::Token::*;
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let mut tokens = Vec::new();
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let mut iter = input.chars().peekable();
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while let Some(c) = iter.next() {
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if c == ';' {
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while let Some(c) = iter.next() {
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if c == '\n' {
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break;
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}
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}
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continue;
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}
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let cur_tok = match c {
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c if char::is_whitespace(c) && c != '\n' => continue,
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'\n' => Newline,
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'(' => LParen,
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')' => RParen,
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'[' => LBracket,
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']' => RBracket,
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'{' => LBrace,
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'}' => RBrace,
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',' => Comma,
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':' => Colon,
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';' => Semicolon,
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'.' => Period,
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'`' => Backtick,
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'\'' => SingleQuote,
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'"' => {
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let mut buffer = String::new();
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loop {
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match iter.next() {
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Some(x) if x == '"' => break,
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Some(x) => buffer.push(x),
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None => return Err(TokenError::new("Unclosed quote")),
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}
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}
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StrLiteral(buffer)
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}
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c if c.is_digit(10) => {
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let mut integer = true;
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let mut buffer = String::new();
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buffer.push(c);
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buffer.extend(iter.peeking_take_while(|x| x.is_digit(10)));
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if let Some(&'.') = iter.peek() {
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buffer.push(iter.next().unwrap());
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integer = false;
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}
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buffer.extend(iter.peeking_take_while(|x| x.is_digit(10)));
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let inner = if integer {
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Number::IntegerRep(buffer)
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} else {
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Number::FloatRep(buffer)
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};
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NumLiteral(inner)
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},
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c if char::is_alphanumeric(c) => {
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let mut buffer = String::new();
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buffer.push(c);
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buffer.extend(iter.peeking_take_while(|x| char::is_alphanumeric(*x)));
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Identifier(buffer)
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},
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c => {
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let mut buffer = String::new();
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buffer.push(c);
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buffer.extend(iter.peeking_take_while(|x| !char::is_whitespace(*x)));
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Operator(buffer)
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}
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};
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tokens.push(cur_tok);
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}
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Ok(tokens)
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}
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impl ProgrammingLanguageInterface for Robo {
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fn get_language_name(&self) -> String {
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"Robo".to_string()
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}
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fn get_source_file_suffix(&self) -> String {
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format!("robo")
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}
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}
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