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helix
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give better error messages 

Fixes #144 (somewhat)
This commit is contained in:
Godfrey Chan 2018-06-14 05:07:06 -07:00
parent cdbe494ecf
commit af2042154e
1 changed files with 25 additions and 19 deletions
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44
src/macros/parser.rs
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@ -924,38 +924,44 @@ macro_rules! parse {
// Catch all
{
state: $state:tt,
buffer: { $($buffer:tt)* },
stack: $stack:tt
} => {
unexpected_token!($($buffer)*);
parse_error!(
"If you suspect this is a bug in Helix itself, please file an ",
"issue with the following debug information:\n\n",
"{\n",
" state: ", stringify!($state), ",\n",
" buffer: ", stringify!({ $($buffer)* }), ",\n",
" stack: ", stringify!($stack), ",\n",
"}"
);
};
{ $($state:tt)* } => {
parse_error!(
"Unknown parser state. ",
"This is possibly a bug in Helix itself, please file an issue ",
"Corrupted parser state. ",
"This is likely a bug in Helix itself, please file an issue ",
"with the following debug information:\n\n",
format_parser_state!($($state)*)
stringify!($($state)*)
);
};
}
#[doc(hidden)]
#[macro_export]
macro_rules! parse_error {
($($message:expr),*) => { compile_error!(concat!("Parse Error! ", $($message),*)); };
macro_rules! unexpected_token {
() => {};
}
#[doc(hidden)]
#[macro_export]
macro_rules! format_parser_state {
{
state: $state:tt,
buffer: $buffer:tt,
stack: $stack:tt
} => {
concat!("{\n",
" state: ", stringify!($state), ",\n",
" buffer: ", stringify!($buffer), ",\n",
" stack: ", stringify!($stack), ",\n",
"}")
};
{ $($state:tt)* } => { concat!("(CORRUPTED)\n", stringify!($($state)*)) };
macro_rules! parse_error {
($($message:expr),*) => { compile_error!(concat!("Parse Error! ", $($message),*)); };
}
#[doc(hidden)]