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-rw-r--r--dhall/src/parser.rs226
1 files changed, 112 insertions, 114 deletions
diff --git a/dhall/src/parser.rs b/dhall/src/parser.rs
index 6abfcca..8c6d520 100644
--- a/dhall/src/parser.rs
+++ b/dhall/src/parser.rs
@@ -197,124 +197,122 @@ macro_rules! match_rule {
make_parser!{
+ named!(eoi<()>; plain_value!(()));
-named!(eoi<()>; plain_value!(()));
-
-named!(str<&'a str>; with_captured_str!(s; { s.trim() }));
-
-named!(natural<usize>; with_raw_pair!(pair; {
- pair.as_str().trim()
- .parse()
- .map_err(|e: std::num::ParseIntError| custom_parse_error(&pair, format!("{}", e)))?
-}));
-
-named!(integer<isize>; with_raw_pair!(pair; {
- pair.as_str().trim()
- .parse()
- .map_err(|e: std::num::ParseIntError| custom_parse_error(&pair, format!("{}", e)))?
-}));
-
-named!(letbinding<(&'a str, Option<BoxExpr<'a>>, BoxExpr<'a>)>;
- match_children!((name: str, annot?: expression, expr: expression) => (name, annot, expr))
-);
-
-named!(record_entry<(&'a str, BoxExpr<'a>)>;
- match_children!((name: str, expr: expression) => (name, expr))
-);
-
-named!(partial_record_entries<(Rule, BoxExpr<'a>, BTreeMap<&'a str, ParsedExpr<'a>>)>;
- with_rule!(rule;
- match_children!((expr: expression, entries*: record_entry) => {
- let mut map: BTreeMap<&str, ParsedExpr> = BTreeMap::new();
- for entry in entries {
- let (n, e) = entry?;
- map.insert(n, *e);
- }
- (rule, expr, map)
- })
- )
-);
-
-named!(expression<BoxExpr<'a>>; match_rule!(
- Rule::natural_literal_raw => map!(natural; |n| bx(Expr::NaturalLit(n))),
- Rule::integer_literal_raw => map!(integer; |n| bx(Expr::IntegerLit(n))),
-
- Rule::identifier_raw =>
- match_children!((name: str, idx?: natural) => {
- match Builtin::parse(name) {
- Some(b) => bx(Expr::Builtin(b)),
- None => match name {
- "True" => bx(Expr::BoolLit(true)),
- "False" => bx(Expr::BoolLit(false)),
- "Type" => bx(Expr::Const(Const::Type)),
- "Kind" => bx(Expr::Const(Const::Kind)),
- name => bx(Expr::Var(V(name, idx.unwrap_or(0)))),
+ named!(str<&'a str>; with_captured_str!(s; { s.trim() }));
+
+ named!(natural<usize>; with_raw_pair!(pair; {
+ pair.as_str().trim()
+ .parse()
+ .map_err(|e: std::num::ParseIntError| custom_parse_error(&pair, format!("{}", e)))?
+ }));
+
+ named!(integer<isize>; with_raw_pair!(pair; {
+ pair.as_str().trim()
+ .parse()
+ .map_err(|e: std::num::ParseIntError| custom_parse_error(&pair, format!("{}", e)))?
+ }));
+
+ named!(letbinding<(&'a str, Option<BoxExpr<'a>>, BoxExpr<'a>)>;
+ match_children!((name: str, annot?: expression, expr: expression) => (name, annot, expr))
+ );
+
+ named!(record_entry<(&'a str, BoxExpr<'a>)>;
+ match_children!((name: str, expr: expression) => (name, expr))
+ );
+
+ named!(partial_record_entries<(Rule, BoxExpr<'a>, BTreeMap<&'a str, ParsedExpr<'a>>)>;
+ with_rule!(rule;
+ match_children!((expr: expression, entries*: record_entry) => {
+ let mut map: BTreeMap<&str, ParsedExpr> = BTreeMap::new();
+ for entry in entries {
+ let (n, e) = entry?;
+ map.insert(n, *e);
}
- }
- }),
-
- Rule::lambda_expression =>
- match_children!((label: str, typ: expression, body: expression) => {
- bx(Expr::Lam(label, typ, body))
- }),
-
- Rule::ifthenelse_expression =>
- match_children!((cond: expression, left: expression, right: expression) => {
- bx(Expr::BoolIf(cond, left, right))
- }),
-
- Rule::let_expression =>
- match_children!((bindings*: letbinding, final_expr: expression) => {
- bindings.fold_results(final_expr, |acc, x| bx(Expr::Let(x.0, x.1, x.2, acc)))?
- }),
-
- Rule::forall_expression =>
- match_children!((label: str, typ: expression, body: expression) => {
- bx(Expr::Pi(label, typ, body))
- }),
-
- Rule::annotated_expression => binop!(Expr::Annot),
- Rule::import_alt_expression => single!(expression),
- Rule::or_expression => binop!(Expr::BoolOr),
- Rule::plus_expression => binop!(Expr::NaturalPlus),
- Rule::text_append_expression => binop!(Expr::TextAppend),
- Rule::list_append_expression => single!(expression),
- Rule::and_expression => binop!(Expr::BoolAnd),
- Rule::combine_expression => single!(expression),
- Rule::prefer_expression => single!(expression),
- Rule::combine_types_expression => single!(expression),
- Rule::times_expression => binop!(Expr::NaturalTimes),
- Rule::equal_expression => binop!(Expr::BoolEQ),
- Rule::not_equal_expression => binop!(Expr::BoolNE),
- Rule::application_expression => binop!(Expr::App),
-
- Rule::selector_expression_raw =>
- match_children!((first: expression, rest*: str) => {
- rest.fold_results(first, |acc, e| bx(Expr::Field(acc, e)))?
- }),
-
- Rule::empty_record_type => plain_value!(bx(Expr::Record(BTreeMap::new()))),
- Rule::empty_record_literal => plain_value!(bx(Expr::RecordLit(BTreeMap::new()))),
- Rule::non_empty_record_type_or_literal =>
- match_children!((first_label: str, rest: partial_record_entries) => {
- let (rule, first_expr, mut map) = rest;
- map.insert(first_label, *first_expr);
- match rule {
- Rule::non_empty_record_type => bx(Expr::Record(map)),
- Rule::non_empty_record_literal => bx(Expr::RecordLit(map)),
- _ => unreachable!()
- }
- }),
+ (rule, expr, map)
+ })
+ )
+ );
- _ => with_rule!(rule;
- match_children!((exprs*: expression) => {
- // panic!();
- let rulename = format!("{:?}", rule);
- bx(Expr::FailedParse(rulename, exprs.map_results(|x| *x).collect::<ParseResult<_>>()?))
- })
- ),
-));
+ named!(expression<BoxExpr<'a>>; match_rule!(
+ Rule::natural_literal_raw => map!(natural; |n| bx(Expr::NaturalLit(n))),
+ Rule::integer_literal_raw => map!(integer; |n| bx(Expr::IntegerLit(n))),
+
+ Rule::identifier_raw =>
+ match_children!((name: str, idx?: natural) => {
+ match Builtin::parse(name) {
+ Some(b) => bx(Expr::Builtin(b)),
+ None => match name {
+ "True" => bx(Expr::BoolLit(true)),
+ "False" => bx(Expr::BoolLit(false)),
+ "Type" => bx(Expr::Const(Const::Type)),
+ "Kind" => bx(Expr::Const(Const::Kind)),
+ name => bx(Expr::Var(V(name, idx.unwrap_or(0)))),
+ }
+ }
+ }),
+
+ Rule::lambda_expression =>
+ match_children!((label: str, typ: expression, body: expression) => {
+ bx(Expr::Lam(label, typ, body))
+ }),
+
+ Rule::ifthenelse_expression =>
+ match_children!((cond: expression, left: expression, right: expression) => {
+ bx(Expr::BoolIf(cond, left, right))
+ }),
+
+ Rule::let_expression =>
+ match_children!((bindings*: letbinding, final_expr: expression) => {
+ bindings.fold_results(final_expr, |acc, x| bx(Expr::Let(x.0, x.1, x.2, acc)))?
+ }),
+
+ Rule::forall_expression =>
+ match_children!((label: str, typ: expression, body: expression) => {
+ bx(Expr::Pi(label, typ, body))
+ }),
+
+ Rule::annotated_expression => binop!(Expr::Annot),
+ Rule::import_alt_expression => single!(expression),
+ Rule::or_expression => binop!(Expr::BoolOr),
+ Rule::plus_expression => binop!(Expr::NaturalPlus),
+ Rule::text_append_expression => binop!(Expr::TextAppend),
+ Rule::list_append_expression => single!(expression),
+ Rule::and_expression => binop!(Expr::BoolAnd),
+ Rule::combine_expression => single!(expression),
+ Rule::prefer_expression => single!(expression),
+ Rule::combine_types_expression => single!(expression),
+ Rule::times_expression => binop!(Expr::NaturalTimes),
+ Rule::equal_expression => binop!(Expr::BoolEQ),
+ Rule::not_equal_expression => binop!(Expr::BoolNE),
+ Rule::application_expression => binop!(Expr::App),
+
+ Rule::selector_expression_raw =>
+ match_children!((first: expression, rest*: str) => {
+ rest.fold_results(first, |acc, e| bx(Expr::Field(acc, e)))?
+ }),
+
+ Rule::empty_record_type => plain_value!(bx(Expr::Record(BTreeMap::new()))),
+ Rule::empty_record_literal => plain_value!(bx(Expr::RecordLit(BTreeMap::new()))),
+ Rule::non_empty_record_type_or_literal =>
+ match_children!((first_label: str, rest: partial_record_entries) => {
+ let (rule, first_expr, mut map) = rest;
+ map.insert(first_label, *first_expr);
+ match rule {
+ Rule::non_empty_record_type => bx(Expr::Record(map)),
+ Rule::non_empty_record_literal => bx(Expr::RecordLit(map)),
+ _ => unreachable!()
+ }
+ }),
+ _ => with_rule!(rule;
+ match_children!((exprs*: expression) => {
+ // panic!();
+ let rulename = format!("{:?}", rule);
+ bx(Expr::FailedParse(rulename, exprs.map_results(|x| *x).collect::<ParseResult<_>>()?))
+ })
+ ),
+ ));
}