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improved error message composition

This commit is contained in:
Sven Vogel 2022-11-14 17:50:34 +01:00
parent d2e57ae72c
commit f262a5d92b
9 changed files with 381 additions and 150 deletions
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1
Cargo.toml
View File

@ -10,3 +10,4 @@ regex = "*"
lazy_static = "1.4.0" lazy_static = "1.4.0"
rand = "0.8.5" rand = "0.8.5"
colored = "*" colored = "*"

4
README.md
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@ -18,7 +18,9 @@ It contains features such as:
// code block // code block
}</code></pre></td></tr><tr><td>cont</td><td>Short form for “continue”. Jumps to the next iteration of a loop</td><td>&nbsp;</td></tr><tr><td>break</td><td>Exits a loop immediately</td><td>&nbsp;</td></tr><tr><td>yield</td><td>Returns from a function with an argument as return value</td><td><pre><code class="language-plaintext">foo() = int { }</code></pre></td></tr><tr><td>cont</td><td>Short form for “continue”. Jumps to the next iteration of a loop</td><td>&nbsp;</td></tr><tr><td>break</td><td>Exits a loop immediately</td><td>&nbsp;</td></tr><tr><td>yield</td><td>Returns from a function with an argument as return value</td><td><pre><code class="language-plaintext">foo() = int {
yield 4 yield 4
}</code></pre></td></tr><tr><td>ret</td><td>Short form for “return”. This keyword takes no argument and returns from a function. NOTE: if ret is used in a function with a return type, an error occurs.</td><td>&nbsp;</td></tr></tbody></table> }</code></pre></td></tr><tr><td>ret</td><td>Short form for “return”. This keyword takes no argument and returns from a function. NOTE: if ret is used in a function with a return type, an error occurs.</td><td>&nbsp;</td></tr><tr><td>please</td><td>Decides on runtime wether a block should be executed or not.</td><td><pre><code class="language-plaintext">please {
// code
}</code></pre></td></tr></tbody></table>
### Example code ### Example code

39
src/inter/mod.rs Normal file
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@ -0,0 +1,39 @@
use std::io::Write;
use crate::data::*;
fn write_expr(file: &mut std::fs::File, indent: &mut String, expr: &Expr) {
match expr {
Expr::Block(block) => write_block(file, indent, block),
Expr::Term(term) => write_term(file, indent, term)
}
}
fn write_term(file: &mut std::fs::File, indent: &mut String, term: &std::collections::VecDeque<crate::token::Token>) {
for token in term.iter() {
write!(file, "{}{}\n", indent, token).unwrap();
}
}
fn write_block(file: &mut std::fs::File, indent: &mut String, block: &std::collections::VecDeque<Expr>) {
indent.push('\t');
block.iter().for_each(|expr| write_expr(file, indent, expr));
indent.pop();
}
pub fn convert_to_erpn<'a>(funcs: &mut Vec<Func<'a>>, declrs: &Vec<Declr<'a>>) {
let mut file = std::fs::OpenOptions::new().write(true).create(true).truncate(true).open("test.erpn").unwrap();
let mut indent = String::new();
for (x, func) in funcs.iter().enumerate() {
// write function name
write!(&mut file, "{}:\n", declrs[x].name.unwrap()).unwrap();
// write down function body
write_expr(&mut file, &mut indent, func.expr.as_ref().unwrap());
}
}

22
src/main.rs
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@ -5,10 +5,11 @@ mod token;
mod parser; mod parser;
// translate a tree of functions and expressions to pseudo assembly // translate a tree of functions and expressions to pseudo assembly
// designed for a virtual stack machiene // designed for a virtual stack machiene
mod inter;
use token::*; use token::*;
use parser::*; use parser::*;
use colored::{Colorize}; use colored::Colorize;
pub fn message(typ: MessageType, msg: String) { pub fn message(typ: MessageType, msg: String) {
println!("{}: {}", typ.to_colored(), msg.bold().bright_white()); println!("{}: {}", typ.to_colored(), msg.bold().bright_white());
@ -19,24 +20,33 @@ fn main() {
let source = let source =
r" r"
# this is pi # this is pi
pi = rat 3.1415926535 pi = rat 5.1415926535
foo(x :int, y: rat) = bool { foo(x:int, y:rat) = bool {
x:int = 5 + 6 x:int = 5 + 6
unless(x < 6) { unless (x < 6) {
yield true yield true
please {
}
unless(x < 6) { unless(x < 6) {
yield true yield true
} }
} }
-- comment
yield false yield false
} }
main { main() = int {
a = 4
b = 5.5
c = true
r = foo(3, 3.4)
0
} }
"; ";

21
src/parser/data.rs
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@ -1,8 +1,16 @@
use core::panic; use core::panic;
use std::collections::{VecDeque}; use std::collections::{VecDeque};
use crate::token::{Token}; use crate::token::{Token, DebugErr};
use crate::Prim; use crate::Prim;
pub struct Diagnostics<'a> {
/// terminating factor on error
err: Option<DebugErr<'a>>,
/// additional warning and informations
/// all non critical
hints: Vec<DebugErr<'a>>
}
#[derive(Debug)] #[derive(Debug)]
pub struct Func<'a> { pub struct Func<'a> {
/// raw tokens /// raw tokens
@ -155,4 +163,15 @@ impl<'a> Scope<'a> {
} }
None None
} }
pub fn new<'b>() -> Scope<'b> {
Scope {
args: None,
vars: vec![],
func_return_typ: None,
expr_yield: false,
yields: false,
cond_count: 0
}
}
} }

153
src/parser/mod.rs
View File

@ -3,6 +3,7 @@ use std::{collections::{VecDeque}, vec};
use crate::token::{Token, Operator, Assoc, Prim, MessageType, Keyword}; use crate::token::{Token, Operator, Assoc, Prim, MessageType, Keyword};
pub mod data; pub mod data;
pub mod msg;
use data::*; use data::*;
@ -24,11 +25,12 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
macro_rules! finish_func { macro_rules! finish_func {
($dbginf:expr) => { ($dbginf:expr) => {
if declrs.contains(&declr) { if declrs.contains(&declr) {
panic!("Function defined multiple times: {declr}") println!("{}", $dbginf.make_msg_w_ext(crate::msg::ERR10, format!("Multiple definitions: {declr}")));
panic!()
} }
if declr.results && declr.result_typ.is_none() { if declr.results && declr.result_typ.is_none() {
$dbginf.print(MessageType::Error, format!("Function is missing return type: {}", declr).as_str(), source); println!("{}", $dbginf.make_msg_w_ext(crate::msg::ERR11, format!("for function {declr}")));
panic!(); panic!();
} }
@ -48,14 +50,16 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
Token::Delemiter(char, dbginf) => match char { Token::Delemiter(char, dbginf) => match char {
'{' => { '{' => {
brace_cnt += 1; brace_cnt += 1;
// we have an found open function body
if brace_cnt == 1 { if brace_cnt == 1 {
if declr.name.is_none() { if declr.name.is_none() {
dbginf.print(MessageType::Error, "Anonymous function not permitted", source); println!("{}", dbginf.make_msg(crate::msg::ERR12));
panic!(); panic!();
} }
if paren_cnt > 0 { if paren_cnt > 0 {
dbginf.print(MessageType::Error, "Unclosed parameter list", source); println!("{}", dbginf.make_msg(crate::msg::ERR13));
panic!(); panic!();
} }
@ -66,6 +70,14 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
}, },
'}' => { '}' => {
brace_cnt -= 1; brace_cnt -= 1;
// we closed one to much
if brace_cnt < 0 {
println!("{}", dbginf.make_msg(crate::msg::ERR14));
panic!();
}
// end of function body
if brace_cnt == 0 { if brace_cnt == 0 {
finish_func!(dbginf); finish_func!(dbginf);
continue; continue;
@ -74,17 +86,12 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
_ => () _ => ()
} }
Token::Type(typ, dbginf) => { Token::Type(typ, dbginf) => if declr.result_typ.is_none() {
if declr.results { if declr.results {
if declr.result_typ.is_some() {
dbginf.print(MessageType::Error, "Function must return either nothing or a single type", source);
panic!();
}
declr.result_typ = Some(*typ); declr.result_typ = Some(*typ);
continue; continue;
} else { } else {
dbginf.print(MessageType::Error, "Missing equal sign", source); println!("{}", dbginf.make_msg(crate::msg::ERR16));
panic!(); panic!();
} }
}, },
@ -104,11 +111,11 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
Token::Operator(op, dbginf) => match op { Token::Operator(op, dbginf) => match op {
Operator::Assign => { Operator::Assign => {
if declr.results { if declr.results {
dbginf.print(MessageType::Error, "double function assignment", source); println!("{}", dbginf.make_msg(crate::msg::ERR17));
panic!(); panic!();
} }
if declr.name.is_none() { if declr.name.is_none() {
dbginf.print(MessageType::Error, "Anonymous function", source); println!("{}", dbginf.make_msg(crate::msg::ERR12));
panic!(); panic!();
} }
@ -123,14 +130,13 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
if declr.name.is_some() { if declr.name.is_some() {
if declr.args.is_none() { if declr.args.is_none() {
dbginf.print(MessageType::Error, "multiple function names", source); println!("{}", dbginf.make_msg(crate::msg::ERR18));
panic!(); panic!();
} }
} else if brace_cnt > 0 { } else if brace_cnt > 0 {
dbginf.print(MessageType::Error, "brace count missmatch", source); println!("{}", dbginf.make_msg(crate::msg::ERR13));
panic!(); panic!();
} } else {
else {
declr.name = Some(text); declr.name = Some(text);
continue; continue;
} }
@ -138,11 +144,11 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
Token::Assign(name, _, dbginf) => { Token::Assign(name, _, dbginf) => {
if declr.results { if declr.results {
dbginf.print(MessageType::Error, "double function assignment", source); println!("{}", dbginf.make_msg(crate::msg::ERR17));
panic!(); panic!();
} }
if declr.name.is_some() { if declr.name.is_some() {
dbginf.print(MessageType::Error, "multiple function names", source); println!("{}", dbginf.make_msg(crate::msg::ERR18));
panic!(); panic!();
} }
@ -160,7 +166,7 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
if paren_cnt == 1 { if paren_cnt == 1 {
if declr.args.is_some() { if declr.args.is_some() {
dbginf.print(MessageType::Error, "double parameter list", source); println!("{}", dbginf.make_msg(crate::msg::ERR19));
panic!(); panic!();
} }
@ -187,18 +193,18 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
else if let Some(args) = &mut declr.args { else if let Some(args) = &mut declr.args {
if paren_cnt == 0 { if paren_cnt == 0 {
top.print(MessageType::Error, "token is no parameter", source); println!("{}", top.create_msg(crate::msg::ERR20));
panic!(); panic!();
} }
match &top { match &top {
Token::Decl(name, typ, _dbginf) => args.push((name, *typ)), Token::Decl(name, typ, _dbginf) => args.push((name, *typ)),
Token::Word(_, dbginf) => { Token::Word(_, dbginf) => {
dbginf.print(MessageType::Error, "type declaration missing", source); println!("{}", dbginf.make_msg(crate::msg::ERR21));
panic!() panic!()
}, },
_ => { _ => {
top.print(MessageType::Error, "argument must be declaration", source); println!("{}", top.create_msg(crate::msg::ERR23));
panic!() panic!()
} }
} }
@ -209,7 +215,7 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
match &top { match &top {
Token::LineBreak(_) | Token::Terminator(_) => (), // valid whitespace Token::LineBreak(_) | Token::Terminator(_) => (), // valid whitespace
_ => { _ => {
top.print(MessageType::Error, "unresolvable token", source); println!("{}", top.create_msg(crate::msg::ERR22));
panic!() panic!()
} }
} }
@ -217,7 +223,7 @@ fn discover_functions<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &str)
if let Some(raw) = func.raw { if let Some(raw) = func.raw {
if let Some(front) = raw.front() { if let Some(front) = raw.front() {
front.print(MessageType::Error, "Open function body", source); println!("{}", front.create_msg(crate::msg::ERR15));
panic!(); panic!();
} }
} }
@ -240,7 +246,7 @@ fn discover_exprs<'a>(functions: &mut Vec<Func<'a>>, _: &Vec<Declr<'a>>, source:
match &top { match &top {
Token::LineBreak(dbginf) | Token::Terminator(dbginf) => if !expr.is_empty() { Token::LineBreak(dbginf) | Token::Terminator(dbginf) => if !expr.is_empty() {
blocks.last_mut().unwrap_or_else(|| { blocks.last_mut().unwrap_or_else(|| {
dbginf.print(MessageType::Error, "curly brace missmatch", source); println!("{}", dbginf.make_msg(crate::msg::ERR41));
panic!() panic!()
}).push_back(Expr::Term(expr)); }).push_back(Expr::Term(expr));
expr = VecDeque::new(); expr = VecDeque::new();
@ -249,7 +255,7 @@ fn discover_exprs<'a>(functions: &mut Vec<Func<'a>>, _: &Vec<Declr<'a>>, source:
Token::Delemiter(char, dbginf) => match char { Token::Delemiter(char, dbginf) => match char {
'{' => { '{' => {
blocks.last_mut().unwrap_or_else(|| { blocks.last_mut().unwrap_or_else(|| {
dbginf.print(MessageType::Error, "curly brace missmatch", source); println!("{}", dbginf.make_msg(crate::msg::ERR41));
panic!() panic!()
}).push_back(Expr::Term(expr)); }).push_back(Expr::Term(expr));
expr = VecDeque::new(); expr = VecDeque::new();
@ -260,11 +266,12 @@ fn discover_exprs<'a>(functions: &mut Vec<Func<'a>>, _: &Vec<Declr<'a>>, source:
// pop topmost block of the stack, storing it in the next lower block // pop topmost block of the stack, storing it in the next lower block
if let Some(block) = blocks.pop() { if let Some(block) = blocks.pop() {
blocks.last_mut().unwrap_or_else(|| { blocks.last_mut().unwrap_or_else(|| {
dbginf.print(MessageType::Error, "curly brace missmatch", source); println!("{}", dbginf.make_msg(crate::msg::ERR41));
panic!() panic!()
}).push_back(Expr::Block(block)); }).push_back(Expr::Block(block));
} else { } else {
panic!("Curly brace missmatch") println!("{}", dbginf.make_msg(crate::msg::ERR40));
panic!()
} }
continue; continue;
}, },
@ -278,7 +285,7 @@ fn discover_exprs<'a>(functions: &mut Vec<Func<'a>>, _: &Vec<Declr<'a>>, source:
if !expr.is_empty() { if !expr.is_empty() {
blocks.last_mut().unwrap_or_else(|| { blocks.last_mut().unwrap_or_else(|| {
expr.back().unwrap().print(MessageType::Error, "curly brace missmatch", source); println!("{}", expr.back().unwrap().create_msg(crate::msg::ERR40));
panic!() panic!()
}).push_back(Expr::Term(expr)); }).push_back(Expr::Term(expr));
} }
@ -292,26 +299,26 @@ fn discover_exprs<'a>(functions: &mut Vec<Func<'a>>, _: &Vec<Declr<'a>>, source:
} }
fn check_var_typ(typ: &mut Option<Prim>, operands: &mut Vec<Prim>, dbginf: &crate::token::DebugInfo, source: &str) { fn check_var_typ(typ: &mut Option<Prim>, operands: &mut Vec<Prim>, dbginf: &crate::token::DebugInfo, source: &str) {
if let Some(value) = operands.pop() { if let Some(value) = operands.pop() {
if !operands.is_empty() { if !operands.is_empty() {
dbginf.print(MessageType::Error, format!("Expr does't resolve to a single value but multiple").as_str(), source); println!("{}", dbginf.make_msg(crate::msg::ERR50));
panic!(); panic!();
} }
if let Some(typ) = typ { if let Some(typ) = typ {
if !typ.is_equal(value) { if !typ.is_equal(value) {
dbginf.print(MessageType::Error, format!("Variable has type {:?} but {:?} was given", typ, value).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR51, format!("needed {:?} got {:?}", typ, value) ));
panic!(); panic!();
} }
} else { } else {
// assign a type to untyped variable // assign a type to untyped variable
dbginf.print(MessageType::Info, format!("Variable has no fixed type, guessing type: {:?}", value).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::INF51, format!("gessed type: {:?}", value) ));
*typ = Some(value); *typ = Some(value);
} }
} else { } else {
dbginf.print(MessageType::Error, "No result to bind variable to", source); println!("{}", dbginf.make_msg(crate::msg::ERR52));
panic!(); panic!();
} }
} }
@ -320,7 +327,7 @@ fn process_keyword(keyword: Keyword, _: &Vec<Declr>, scope: &mut Scope, operands
match keyword { match keyword {
Keyword::If | Keyword::While => { Keyword::If | Keyword::While => {
if operands.len() != 1 { if operands.len() != 1 {
dbginf.print(MessageType::Error, format!("Expected single boolean got {} values", operands.len()).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR53, format!("got {:?} values", operands.len()) ));
panic!(); panic!();
} }
@ -328,7 +335,7 @@ fn process_keyword(keyword: Keyword, _: &Vec<Declr>, scope: &mut Scope, operands
match operand { match operand {
Prim::Bool => (), Prim::Bool => (),
_ => { _ => {
dbginf.print(MessageType::Error, format!("Expected boolean, got {:?}", operand).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR53, format!("got {:?}", operand) ));
panic!(); panic!();
} }
} }
@ -336,30 +343,30 @@ fn process_keyword(keyword: Keyword, _: &Vec<Declr>, scope: &mut Scope, operands
}, },
Keyword::Return => { Keyword::Return => {
if scope.func_return_typ.is_some() { if scope.func_return_typ.is_some() {
dbginf.print(MessageType::Error, "cannot return function, did u mean to use `yield`?", source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR54, "perhaps use `yield`" ));
panic!(); panic!();
} }
} }
Keyword::Yield => { Keyword::Yield => {
if operands.len() != 1 { if operands.len() != 1 {
dbginf.print(MessageType::Error, format!("Expected single value but got {} values", operands.len()).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR55, format!("got {:?} instead of 1", operands.len()) ));
panic!(); panic!();
} }
if let Some(operand) = operands.pop() { if let Some(operand) = operands.pop() {
if let Some(typ) = scope.func_return_typ { if let Some(typ) = scope.func_return_typ {
if typ != operand { if typ != operand {
dbginf.print(MessageType::Error, format!("Expected {:?} but got {:?}", typ, operand).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR59, format!("expected {:?} got {:?}", typ, operand) ));
panic!(); panic!();
} }
println!("{}", scope.cond_count); println!("{}", scope.cond_count);
scope.yields = scope.cond_count == 1; scope.yields = scope.cond_count == 1;
} else { } else {
dbginf.print(MessageType::Error, format!("Function does not return anything").as_str(), source); println!("{}", dbginf.make_msg(crate::msg::ERR57));
panic!(); panic!();
} }
} else { } else {
dbginf.print(MessageType::Error, format!("Yield must return something").as_str(), source); println!("{}", dbginf.make_msg(crate::msg::ERR58));
panic!(); panic!();
} }
} }
@ -367,12 +374,12 @@ fn process_keyword(keyword: Keyword, _: &Vec<Declr>, scope: &mut Scope, operands
} }
} }
fn collapse_operation(operation: &Token, declrs: &Vec<Declr>, scope: &mut Scope, operands: &mut Vec<Prim>, source: &str) { fn collapse_operation(operation: &mut Token, declrs: &Vec<Declr>, scope: &mut Scope, operands: &mut Vec<Prim>, source: &str) {
match operation { match operation {
Token::Operator(op, dbginf) => op.operate(operands, &dbginf, source), Token::Operator(op, dbginf) => op.operate(operands, &dbginf, source),
Token::Assign(name, mut typ, dbginf) => { Token::Assign(name, mut typ, dbginf) => {
check_var_typ(&mut typ, operands, &dbginf, source); check_var_typ(&mut typ, operands, &dbginf, source);
scope.decl_var((*name).to_owned(), typ.to_owned()); scope.decl_var((*name).to_owned(), typ);
}, },
Token::Func(name, dbginf) => call_func(name, declrs, scope, operands, &dbginf, source), Token::Func(name, dbginf) => call_func(name, declrs, scope, operands, &dbginf, source),
Token::Keyword(keyword, dbginf) => process_keyword(*keyword, declrs, scope, operands, &dbginf, source), Token::Keyword(keyword, dbginf) => process_keyword(*keyword, declrs, scope, operands, &dbginf, source),
@ -387,7 +394,7 @@ fn call_func(name: &str, declrs: &Vec<Declr>, _: &mut Scope, operands: &mut Vec<
if let Some(args) = &declr.args { if let Some(args) = &declr.args {
if args.len() > operands.len() { if args.len() > operands.len() {
dbginf.print(MessageType::Error, format!("Expected {} parameters but got {}", args.len(), operands.len()).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR60, format!("expected {:?} got {:?}", args.len(), operands.len()) ));
panic!() panic!()
} }
@ -395,7 +402,7 @@ fn call_func(name: &str, declrs: &Vec<Declr>, _: &mut Scope, operands: &mut Vec<
let operand = operands.first().unwrap(); let operand = operands.first().unwrap();
if !operand.is_equal(arg.1) { if !operand.is_equal(arg.1) {
dbginf.print(MessageType::Error, format!("Expected {:?} as parameter {x}, but got {:?}", arg, operand).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR61, format!("expected {:?} got {:?}", arg, operand) ));
panic!() panic!()
} }
@ -434,7 +441,7 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
output.push_back(Token::Var(text, *dbginf)); output.push_back(Token::Var(text, *dbginf));
continue; continue;
} }
dbginf.print(MessageType::Error, "Unknown word", source); println!("{}", dbginf.make_msg(crate::msg::ERR62));
panic!() panic!()
} }
Token::Bool(_, _) => { Token::Bool(_, _) => {
@ -442,7 +449,7 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
value_stack.push(Prim::Bool) value_stack.push(Prim::Bool)
}, },
Token::Number(_, hint, _) => { Token::Number(_, hint, _) => {
output.push_back(token); output.push_back(token.clone());
value_stack.push(Prim::UntypedNum(*hint)) value_stack.push(Prim::UntypedNum(*hint))
}, },
Token::Assign(_, _, _) => { Token::Assign(_, _, _) => {
@ -450,18 +457,18 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
}, },
Token::Keyword(_, _) => op_stack.push(token), Token::Keyword(_, _) => op_stack.push(token),
Token::Delemiter(char, _) => { Token::Delemiter(char, dbginf) => {
match char { match char {
'(' => op_stack.push(token), '(' => op_stack.push(token),
')' => { ')' => {
while let Some(token) = op_stack.pop() { while let Some(mut token) = op_stack.pop() {
match &token { match &token {
Token::Delemiter(char, _) => if *char == '(' { Token::Delemiter(char, _) => if *char == '(' {
if let Some(next) = op_stack.last() { if let Some(next) = op_stack.last() {
match &next { match &next {
Token::Func(_, _) => { Token::Func(_, _) => {
let token = op_stack.pop().unwrap(); let mut token = op_stack.pop().unwrap();
collapse_operation(&token, declrs, scope, &mut value_stack, source); collapse_operation(&mut token, declrs, scope, &mut value_stack, source);
output.push_back(token); output.push_back(token);
}, },
_ => () _ => ()
@ -470,26 +477,30 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
continue 'outer; continue 'outer;
}, },
_ => { _ => {
collapse_operation(&token, declrs, scope, &mut value_stack, source); collapse_operation(&mut token, declrs, scope, &mut value_stack, source);
output.push_back(token) output.push_back(token)
} }
} }
} }
panic!("Mismatched right parenthesis") println!("{}", dbginf.make_msg(crate::msg::ERR64));
panic!();
}, },
_ => panic!("Misplaced character: '{char}'") _ => {
println!("{}", dbginf.make_msg(crate::msg::ERR65));
panic!()
}
} }
} }
Token::Operator(op, _) => { Token::Operator(op, _) => {
let prec0 = op.prec(); let prec0 = op.prec();
while let Some(top) = op_stack.last(){ while let Some(mut top) = op_stack.last_mut(){
match &top { match &top {
Token::Operator(op1, _) => { Token::Operator(op1, _) => {
let prec1 = op1.prec(); let prec1 = op1.prec();
if prec1 > prec0 || prec0 == prec1 && op.assoc() == Assoc::Left { if prec1 > prec0 || prec0 == prec1 && op.assoc() == Assoc::Left {
collapse_operation(top, declrs, scope, &mut value_stack, source); collapse_operation(&mut top, declrs, scope, &mut value_stack, source);
output.push_back(op_stack.pop().unwrap()); output.push_back(op_stack.pop().unwrap());
continue continue
} }
@ -504,20 +515,20 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
} }
} }
while let Some(token) = op_stack.pop() { while let Some(mut token) = op_stack.pop() {
match &token { match &token {
Token::Delemiter(char, _) => if *char == '(' { Token::Delemiter(char, dbginf) => if *char == '(' {
panic!("Mismatched parenthesis") println!("{}", dbginf.make_msg(crate::msg::ERR63));
}, },
_ => { _ => {
collapse_operation(&token, declrs, scope, &mut value_stack, source); collapse_operation(&mut token, declrs, scope, &mut value_stack, source);
output.push_back(token) output.push_back(token)
} }
} }
} }
if value_stack.len() > 1 { if value_stack.len() > 1 {
output[0].print(MessageType::Error, "expression resolves to multiple results", source); println!("{}", output[0].create_msg(crate::msg::ERR50));
panic!(); panic!();
} }
@ -525,7 +536,7 @@ fn parse_term<'a>(term: &mut VecDeque<Token<'a>>, declrs: &Vec<Declr<'a>>, scope
if scope.expr_yield { if scope.expr_yield {
let yielded = value_stack.pop().unwrap(); let yielded = value_stack.pop().unwrap();
if !yielded.is_equal(scope.func_return_typ.unwrap()) { if !yielded.is_equal(scope.func_return_typ.unwrap()) {
output[0].print(MessageType::Error, format!("expected {:?} but got {:?}", scope.func_return_typ.unwrap(), yielded).as_str(), source); println!("{}", output[0].create_msg_w_ext(crate::msg::ERR59, format!("expected: {:?} got {:?}", scope.func_return_typ.unwrap(), yielded) ));
panic!(); panic!();
} }
} }
@ -556,14 +567,7 @@ fn parse_block<'a>(block: &mut Block<'a>, declrs: &Vec<Declr<'a>>, scope: &mut S
} }
fn parse_exprs<'a>(funcs: &mut Vec<Func<'a>>, declrs: &Vec<Declr<'a>>, source: &'a str) { fn parse_exprs<'a>(funcs: &mut Vec<Func<'a>>, declrs: &Vec<Declr<'a>>, source: &'a str) {
let mut scope = Scope { let mut scope = Scope::new();
args: None,
vars: vec![],
func_return_typ: None,
expr_yield: false,
yields: false,
cond_count: 0
};
for (x, func) in funcs.iter_mut().enumerate() { for (x, func) in funcs.iter_mut().enumerate() {
match func.expr.as_mut().expect("Function has no body") { match func.expr.as_mut().expect("Function has no body") {
@ -576,7 +580,7 @@ fn parse_exprs<'a>(funcs: &mut Vec<Func<'a>>, declrs: &Vec<Declr<'a>>, source: &
parse_block(block, declrs, &mut scope, source); parse_block(block, declrs, &mut scope, source);
if scope.func_return_typ.is_some() && !scope.yields && !scope.expr_yield { if scope.func_return_typ.is_some() && !scope.yields && !scope.expr_yield {
crate::message(MessageType::Error, format!("Function {} missing return value at some point", declrs[x])); //token.create_msg_w_ext(crate::msg::ERR56, format!("at function {}", declrs[x]));
panic!(); panic!();
} }
}, },
@ -591,12 +595,11 @@ fn parse_exprs<'a>(funcs: &mut Vec<Func<'a>>, declrs: &Vec<Declr<'a>>, source: &
pub fn parse<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &'a str) -> Vec<Func<'a>> { pub fn parse<'a>(tokens: &mut VecDeque<crate::Token<'a>>, source: &'a str) -> Vec<Func<'a>> {
let (mut funcs, declrs) = discover_functions(tokens, source); let (mut funcs, declrs) = discover_functions(tokens, source);
// make all of this shit return a mutable diagnostics struct.
discover_exprs(&mut funcs, &declrs, source); discover_exprs(&mut funcs, &declrs, source);
parse_exprs(&mut funcs, &declrs, source); parse_exprs(&mut funcs, &declrs, source);
for (x, f) in funcs.iter().enumerate() { crate::inter::convert_to_erpn(&mut funcs, &declrs);
println!("{:#?}{:#?}", declrs[x], f);
}
funcs funcs
} }

50
src/parser/msg.rs Normal file
View File

@ -0,0 +1,50 @@
use crate::token::DebugMsg;
use crate::token::MessageType::Error;
use crate::token::MessageType::Warning;
use crate::token::MessageType::Info;
pub const ERR10: &DebugMsg = &DebugMsg { typ: Error, code: 10, msg: "Function defined multiple times" };
pub const ERR11: &DebugMsg = &DebugMsg { typ: Error, code: 11, msg: "Function missing return type" };
pub const ERR12: &DebugMsg = &DebugMsg { typ: Error, code: 12, msg: "Function missing name" };
pub const ERR13: &DebugMsg = &DebugMsg { typ: Error, code: 13, msg: "Open parameter list" };
pub const ERR14: &DebugMsg = &DebugMsg { typ: Error, code: 14, msg: "Closed non existant function body" };
pub const ERR15: &DebugMsg = &DebugMsg { typ: Error, code: 15, msg: "Open function body" };
pub const ERR16: &DebugMsg = &DebugMsg { typ: Error, code: 16, msg: "Missing assign for return type" };
pub const ERR17: &DebugMsg = &DebugMsg { typ: Error, code: 17, msg: "Double function assign" };
pub const ERR18: &DebugMsg = &DebugMsg { typ: Error, code: 18, msg: "Function has multiple names" };
pub const ERR19: &DebugMsg = &DebugMsg { typ: Error, code: 19, msg: "Multiple parameter lists" };
pub const ERR20: &DebugMsg = &DebugMsg { typ: Error, code: 20, msg: "not a valid parameter" };
pub const ERR21: &DebugMsg = &DebugMsg { typ: Error, code: 21, msg: "type declaration missing for parameter" };
pub const ERR22: &DebugMsg = &DebugMsg { typ: Error, code: 22, msg: "token outside of function definition" };
pub const ERR23: &DebugMsg = &DebugMsg { typ: Error, code: 23, msg: "token must be declaration" };
pub const ERR40: &DebugMsg = &DebugMsg { typ: Error, code: 40, msg: "Open block" };
pub const ERR41: &DebugMsg = &DebugMsg { typ: Error, code: 41, msg: "Closed non existant block" };
pub const INF51: &DebugMsg = &DebugMsg { typ: Info, code: 51, msg: "No variable type provided" };
pub const ERR50: &DebugMsg = &DebugMsg { typ: Error, code: 50, msg: "Expression has multiple values" };
pub const ERR51: &DebugMsg = &DebugMsg { typ: Error, code: 51, msg: "Missmatched variable types" };
pub const ERR52: &DebugMsg = &DebugMsg { typ: Error, code: 52, msg: "Unable to assign variable type" };
pub const ERR53: &DebugMsg = &DebugMsg { typ: Error, code: 53, msg: "Expected single boolean value" };
pub const ERR54: &DebugMsg = &DebugMsg { typ: Error, code: 54, msg: "Cannot return from function without result" };
pub const ERR55: &DebugMsg = &DebugMsg { typ: Error, code: 55, msg: "Expected single value" };
pub const ERR56: &DebugMsg = &DebugMsg { typ: Error, code: 56, msg: "Function missing return value" };
pub const ERR57: &DebugMsg = &DebugMsg { typ: Error, code: 57, msg: "Function does not return anything" };
pub const ERR58: &DebugMsg = &DebugMsg { typ: Error, code: 58, msg: "Yield must return a value" };
pub const ERR59: &DebugMsg = &DebugMsg { typ: Error, code: 59, msg: "Missmatched function return type" };
pub const ERR60: &DebugMsg = &DebugMsg { typ: Error, code: 60, msg: "Missmatched parameter count" };
pub const ERR61: &DebugMsg = &DebugMsg { typ: Error, code: 61, msg: "Missmatched parameter type" };
pub const ERR62: &DebugMsg = &DebugMsg { typ: Error, code: 62, msg: "Unknown symbol" };
pub const ERR63: &DebugMsg = &DebugMsg { typ: Error, code: 63, msg: "Missing left parenthesis" };
pub const ERR64: &DebugMsg = &DebugMsg { typ: Error, code: 64, msg: "Missing right parenthesis" };
pub const ERR65: &DebugMsg = &DebugMsg { typ: Error, code: 65, msg: "Missplaced character" };
pub const ERR70: &DebugMsg = &DebugMsg { typ: Error, code: 70, msg: "Unknown type declaration"};
pub const ERR71: &DebugMsg = &DebugMsg { typ: Error, code: 71, msg: "Unable to identify characters as token"};
pub const ERR72: &DebugMsg = &DebugMsg { typ: Error, code: 72, msg: "Unknown operator"};
pub const ERR73: &DebugMsg = &DebugMsg { typ: Error, code: 73, msg: "Missmatched types for operation"};
pub const ERR74: &DebugMsg = &DebugMsg { typ: Error, code: 74, msg: "Missing operands"};

197
src/token/mod.rs
View File

@ -1,4 +1,4 @@
use std::{collections::{VecDeque}}; use std::collections::VecDeque;
use colored::{Colorize, ColoredString}; use colored::{Colorize, ColoredString};
#[derive(Debug, Hash, PartialEq, Eq, Copy, Clone)] #[derive(Debug, Hash, PartialEq, Eq, Copy, Clone)]
@ -82,7 +82,7 @@ impl Operator {
fn present_types(operands: &[Prim], types: &[Prim], r#yield: Prim, dbginf: &DebugInfo, source: &str) -> Option<Prim> { fn present_types(operands: &[Prim], types: &[Prim], r#yield: Prim, dbginf: &DebugInfo, source: &str) -> Option<Prim> {
if operands.len() < types.len() { if operands.len() < types.len() {
dbginf.print(MessageType::Error, format!("Missing {} operands", types.len() - operands.len()).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR74, format!("required {} got {}", types.len() - operands.len(), operands.len())));
panic!() panic!()
} }
@ -130,7 +130,7 @@ impl Operator {
operands.pop(); operands.pop();
operands.push(result); operands.push(result);
} else { } else {
dbginf.print(MessageType::Error, format!("Missmatched types for {:?}, expected either two integer or rationals", self).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR73, "expected two numbers"));
panic!() panic!()
} }
}, },
@ -144,7 +144,7 @@ impl Operator {
operands.pop(); operands.pop();
operands.push(result); operands.push(result);
} else { } else {
dbginf.print(MessageType::Error, format!("Missmatched types for {:?}, expected two booleans", self).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR73, "expected two booleans"));
panic!() panic!()
} }
}, },
@ -169,11 +169,13 @@ impl Operator {
operands.pop(); operands.pop();
operands.push(result); operands.push(result);
} else { } else {
dbginf.print(MessageType::Error, format!("Missmatched types for {:?}, expected two numbers", self).as_str(), source); println!("{}", dbginf.make_msg_w_ext(crate::msg::ERR73, "expected two numbers"));
panic!() panic!()
} }
}, },
_ => panic!("Unknown operator: {:?}", self) _ => {
panic!("Unknown operator");
}
} }
} }
} }
@ -187,7 +189,8 @@ pub enum Keyword {
Break, Break,
Continue, Continue,
Return, Return,
Yield Yield,
Please,
} }
impl Keyword { impl Keyword {
@ -200,6 +203,7 @@ impl Keyword {
"cont" => Keyword::Continue, "cont" => Keyword::Continue,
"ret" => Keyword::Return, "ret" => Keyword::Return,
"yield" => Keyword::Yield, "yield" => Keyword::Yield,
"please" => Keyword::Please,
_ => panic!("Text not a known keyword {text}") _ => panic!("Text not a known keyword {text}")
} }
} }
@ -239,7 +243,7 @@ impl Prim {
"bool" => Prim::Bool, "bool" => Prim::Bool,
_ => { _ => {
dbginf.print(MessageType::Error, "Unknown type declaration", source); println!("{}", dbginf.make_msg(&crate::msg::ERR70));
panic!() panic!()
} }
} }
@ -269,14 +273,64 @@ impl Prim {
} }
} }
pub struct DebugMsg {
pub code: i32,
pub typ: MessageType,
pub msg: &'static str,
}
pub struct DebugErr<'a> {
info: DebugInfo<'a>,
/// generic error description
msg: &'static DebugMsg,
/// extra message which is case specific
ext: Option<String>,
}
impl<'a> std::fmt::Display for DebugErr<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
// write header as:
// `Error (56) some syntax error message in line 5:`
f.write_fmt(format_args!("{} ({}) {} in line {}: {}\n",
self.msg.typ.to_colored(),
self.msg.code,
self.msg.msg.bold().bright_white(),
self.info.line,
self.ext.as_ref().unwrap_or(&String::new())
));
// write additional information
f.write_fmt(format_args!("{}", self.info))
}
}
#[derive(Debug, PartialEq, Eq, Copy, Clone)] #[derive(Debug, PartialEq, Eq, Copy, Clone)]
pub struct DebugInfo { pub struct DebugInfo<'a> {
/// index in source string where the token begins in the current line /// index in source string where the token begins in the current line
start: usize, start: usize,
/// index in source string where the token ends in the current line /// index in source string where the token ends in the current line
end: usize, end: usize,
/// line number where the line in which the token is begins /// line number where the line in which the token is begins
line: usize line: usize,
source: &'a str
}
impl<'a> DebugInfo<'a> {
pub fn make_msg(&self, msg: &'static DebugMsg) -> DebugErr {
DebugErr {
info: self.clone(),
msg,
ext: None
}
}
pub fn make_msg_w_ext<T>(&self, msg: &'static DebugMsg, ext: T) -> DebugErr where T: Into<String> {
DebugErr {
info: self.clone(),
msg,
ext: Some(ext.into())
}
}
} }
#[derive(Debug)] #[derive(Debug)]
@ -301,79 +355,97 @@ impl MessageType {
} }
} }
impl DebugInfo { impl<'a> std::fmt::Display for DebugInfo<'a> {
/// print message in the form of: fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
/// ```text f.write_fmt(format_args!(" somewhere in here:\n --> `{}`\n",
/// Error (message) in line 7: token `code` self.source.lines().nth(self.line).unwrap().trim().bold().bright_white())).unwrap();
/// somewhere in here:
/// --> `code line`
/// ^^^^
/// ```
pub fn print<'a>(&self, typ: MessageType, msg: &str, source: &'a str) {
println!("{} ({}) in line {}: token `{}`", typ.to_colored(), msg.bold().bright_white(), self.line, &source[self.start..self.end].bold());
println!(" somewhere in here:\n --> `{}`", source.lines().nth(self.line).unwrap().trim().bold().bright_white());
for _ in 0..self.start + 6 { (0..self.start + 6).into_iter().for_each(|_| f.write_str(" ").unwrap());
print!(" "); (self.start..self.end).into_iter().for_each(|_| f.write_str("^").unwrap());
}
for _ in self.start..self.end { Ok(())
print!("^");
}
println!("\n");
} }
} }
#[derive(Debug, PartialEq, Eq, Copy, Clone)] #[derive(Debug, PartialEq, Eq, Clone)]
/// A token represents a basic building block for source code. /// A token represents a basic building block for source code.
/// They give a meaning to patterns of chars allowing to interpret them. /// They give a meaning to patterns of chars allowing to interpret them.
pub enum Token<'a> { pub enum Token<'a> {
// base tokens that can simply be split to from raw source code // base tokens that can simply be split to from raw source code
Word(&'a str, DebugInfo), Word(&'a str, DebugInfo<'a>),
/// Single symbol delemiter like ```(```,```}``` /// Single symbol delemiter like ```(```,```}```
Delemiter(char, DebugInfo), Delemiter(char, DebugInfo<'a>),
Operator(Operator, DebugInfo), Operator(Operator, DebugInfo<'a>),
Number(&'a str, NumberClassHint, DebugInfo), Number(&'a str, NumberClassHint, DebugInfo<'a>),
LineBreak(DebugInfo), LineBreak(DebugInfo<'a>),
Func(&'a str, DebugInfo), Func(&'a str, DebugInfo<'a>),
/// Variable /// Variable
Var(&'a str, DebugInfo), Var(&'a str, DebugInfo<'a>),
/// Function argument /// Function argument
Arg(&'a str, DebugInfo), Arg(&'a str, DebugInfo<'a>),
/// Variable assignment in the form of ```name = ``` /// Variable assignment in the form of ```name = ```
Assign(&'a str, Option<Prim>, DebugInfo), Assign(&'a str, Option<Prim>, DebugInfo<'a>),
/// Variable type declaration in the form of ```name:type``` /// Variable type declaration in the form of ```name:type```
Decl(&'a str, Prim, DebugInfo), Decl(&'a str, Prim, DebugInfo<'a>),
Bool(bool, DebugInfo), Bool(bool, DebugInfo<'a>),
/// Keywords like ```if```,```break```,```while``` /// Keywords like ```if```,```break```,```while```
Keyword(Keyword, DebugInfo), Keyword(Keyword, DebugInfo<'a>),
Type(Prim, DebugInfo), Type(Prim, DebugInfo<'a>),
/// Semicolon /// Semicolon
Terminator(DebugInfo) Terminator(DebugInfo<'a>)
} }
impl<'a> Token<'a> { impl<'a> std::fmt::Display for Token<'a> {
/// redirect for ```DebugInfo.print()``` fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
pub fn print(&self, error: MessageType, arg: &str, source: &str) {
match self { match self {
Token::Type(_, dbginf) => dbginf.print(error, arg, source), Token::Type(t, _) => f.write_fmt(format_args!("__Type {:?}", t)),
Token::Word(_, dbginf) => dbginf.print(error, arg, source), Token::Word(w, _) => f.write_fmt(format_args!("__Word {:?}", w)),
Token::Delemiter(_, dbginf) => dbginf.print(error, arg, source), Token::Delemiter(d, _) => f.write_fmt(format_args!("__Delemiter {:?}", d)),
Token::Operator(_, dbginf) => dbginf.print(error, arg, source), Token::Operator(o, _) => f.write_fmt(format_args!("{:?}", o)),
Token::Number(_, _, dbginf) => dbginf.print(error, arg, source), Token::Number(n, hint, _) => f.write_fmt(format_args!("Load {:?} {}", hint, n)),
Token::LineBreak(dbginf) => dbginf.print(error, arg, source), Token::LineBreak(_) => f.write_str("__Line-break"),
Token::Func(_, dbginf) => dbginf.print(error, arg, source), Token::Func(name, _) => f.write_fmt(format_args!("Call {}", name)),
Token::Var(_, dbginf) => dbginf.print(error, arg, source), Token::Var(v, _) => f.write_fmt(format_args!("Load Var {}", v)),
Token::Arg(_, dbginf) => dbginf.print(error, arg, source), Token::Arg(a, _) => f.write_fmt(format_args!("Load Arg {}", a)),
Token::Assign(_, _, dbginf) => dbginf.print(error, arg, source), Token::Assign(a, typ, _) => f.write_fmt(format_args!("Store {:?} {}", typ, a)),
Token::Decl(_, _, dbginf) => dbginf.print(error, arg, source), Token::Decl(d, typ, _) => f.write_fmt(format_args!("__Decl {:?} as {}", typ, d)),
Token::Bool(_, dbginf) => dbginf.print(error, arg, source), Token::Bool(b, _) => f.write_fmt(format_args!("Load Bool {}", b)),
Token::Keyword(_, dbginf) => dbginf.print(error, arg, source), Token::Keyword(k, _) => f.write_fmt(format_args!("{:?}", k)),
Token::Terminator(dbginf) => dbginf.print(error, arg, source), Token::Terminator(_) => f.write_str("__Terminator"),
} }
} }
} }
const TOKEN_REGEX_SRC: &'static str = r"(#.*)|(unless|while|loop|break|cont|ret|yield)|(int|rat|bool)|(true|false|ye|no|maybe)|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9]+))?\s*=|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9]+))|([A-Za-z_]+)|(\d*\.?\d+)|(!=|==|<=|<=|[&|+\-*/<>=])|([(){}])|(\n)|(;)"; impl<'a> Token<'a> {
fn debug_info(&self) -> &DebugInfo {
match self {
Token::Type(_, d) => d,
Token::Word(_, d) => d,
Token::Delemiter(_, d) => d,
Token::Operator(_, d) => d,
Token::Number(_, _, d) => d,
Token::LineBreak(d) => d,
Token::Func(_, d) => d,
Token::Var(_, d) => d,
Token::Arg(_, d) => d,
Token::Assign(_, _, d) => d,
Token::Decl(_, _, d) => d,
Token::Bool(_, d) => d,
Token::Keyword(_, d) => d,
Token::Terminator(d) => d,
}
}
pub fn create_msg(&self, msg: &'static DebugMsg) -> DebugErr {
DebugErr { info: self.debug_info().clone(), msg, ext: None }
}
pub fn create_msg_w_ext<T>(&self, msg: &'static DebugMsg, ext: T) -> DebugErr where T: Into<String> {
DebugErr { info: self.debug_info().clone(), msg, ext: Some(ext.into()) }
}
}
const TOKEN_REGEX_SRC: &'static str = r"(#.*|--.*)|(unless|while|loop|break|cont|ret|yield|please)|(int|rat|bool)|(true|false|ye|no|maybe)|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9]+))?\s*=|([A-Za-z_]+)\s*(?::\s*([a-zA-Z0-9]+))|([A-Za-z_]+)|(\d*\.?\d+)|(!=|==|<=|<=|[&|+\-*/<>=])|([(){}])|(\n)|(;)";
lazy_static::lazy_static! { lazy_static::lazy_static! {
static ref TOKEN_REGEX: regex::Regex = regex::Regex::new(TOKEN_REGEX_SRC).unwrap(); static ref TOKEN_REGEX: regex::Regex = regex::Regex::new(TOKEN_REGEX_SRC).unwrap();
@ -405,6 +477,7 @@ pub fn tokenize<'a>(source: &'a str) -> VecDeque<Token<'a>> {
// if we have a match, save it as token // if we have a match, save it as token
if let Some(mat) = group { if let Some(mat) = group {
let debug_info = DebugInfo { let debug_info = DebugInfo {
source,
start: mat.start() - line_start, start: mat.start() - line_start,
end: mat.end() - line_start, end: mat.end() - line_start,
line: line_count line: line_count
@ -440,7 +513,7 @@ pub fn tokenize<'a>(source: &'a str) -> VecDeque<Token<'a>> {
14 => Token::Terminator(debug_info), 14 => Token::Terminator(debug_info),
_ => { _ => {
debug_info.print(MessageType::Error, "Unable to identify sequence as token", source); println!("{}", debug_info.make_msg(crate::msg::ERR71));
panic!() panic!()
} }
}); });

34
test.erpn Normal file
View File

@ -0,0 +1,34 @@
pi:
Load Rat 5.1415926535
foo:
Load Int 5
Load Int 6
Add
Store Some(Int) x
Load Arg x
Load Int 6
Lt
If
Load Bool true
Yield
Please
Load Arg x
Load Int 6
Lt
If
Load Bool true
Yield
Load Bool false
Yield
main:
Load Int 4
Store None a
Load Rat 5.5
Store None b
Load Bool true
Store None c
Load Int 3
Load Rat 3.4
Call foo
Store None r
Load Int 0