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More use of Token in error messages

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This commit is contained in:
greg 2019-01-05 17:40:05 -08:00
parent f2f8ac7ee8
commit 22f2750853
1 changed files with 13 additions and 9 deletions
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22
schala-lang/language/src/parsing.rs
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@ -121,13 +121,16 @@ macro_rules! print_token_pattern {
}
macro_rules! expect {
($self:expr, $token_type:pat) => { expect!($self, $token_type if true) };
($self:expr, $token_type:pat if $cond:expr) => {
match $self.peek() {
$token_type if $cond => $self.next(),
tok => {
let msg = format!("Expected {}, got {:?}", print_token_pattern!($token_type), tok);
return ParseError::new(&msg);
($self:expr, $token_kind:pat) => { expect!($self, $token_kind if true) };
($self:expr, $expected_kind:pat if $cond:expr) => {
{
let tok = $self.token_handler.peek_token();
match tok.get_kind() {
$expected_kind if $cond => $self.next(),
actual_kind => {
let msg = format!("Expected {}, got {:?}", print_token_pattern!($expected_kind), actual_kind);
return ParseError::new_with_token(&msg, tok);
}
}
}
}
@ -982,7 +985,8 @@ impl Parser {
#[recursive_descent_method]
fn for_expr_body(&mut self) -> ParseResult<ForBody> {
use self::ForBody::*;
Ok(match self.peek() {
let tok = self.token_handler.peek_token();
Ok(match tok.get_kind() {
LCurlyBrace => {
let statements = delimited!(self, LCurlyBrace, statement, Newline | Semicolon, RCurlyBrace, nonstrict);
StatementBlock(statements.into_iter().map(|s| Node::new(s)).collect())
@ -991,7 +995,7 @@ impl Parser {
self.next();
MonadicReturn(self.expression()?)
},
_ => return ParseError::new("for expressions must end in a block or 'return'"),
_ => return ParseError::new_with_token("for expressions must end in a block or 'return'", tok),
})
}