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Show more useful information in parse tracing

This commit is contained in:
greg 2017-09-15 16:40:16 -07:00
parent 5ecd28d057
commit 565461e1db
1 changed files with 3 additions and 3 deletions
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6
src/schala_lang/parsing.rs
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@ -443,7 +443,7 @@ macro_rules! parse_method {
($name:ident, $self:ident, $type:ty, $body:tt) => {
fn $name(&mut $self) -> $type {
let next_token = $self.peek();
let record = ParseRecord(format!("Token: {:?}", next_token));
let record = ParseRecord(format!("production {}, Token: {:?}", stringify!($name), next_token));
$self.parse_record.push(record);
$body
}
@ -482,7 +482,7 @@ impl Parser {
Ok(AST(statements))
});
fn statement(&mut self) -> ParseResult<Statement> {
parse_method!(statement, self, ParseResult<Statement>, {
//TODO handle error recovery here
match self.peek() {
Keyword(Alias) => self.type_alias().map(|alias| { Statement::Declaration(alias) }),
@ -490,7 +490,7 @@ impl Parser {
Keyword(Func)=> self.func_declaration().map(|func| { Statement::Declaration(func) }),
_ => self.expression().map(|expr| { Statement::Expression(expr) } ),
}
}
});
fn type_alias(&mut self) -> ParseResult<Declaration> {
expect!(self, Keyword(Alias), "Expected 'alias'");