diff options
author | Nadrieril Feneanar | 2020-02-19 17:25:57 +0000 |
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committer | GitHub | 2020-02-19 17:25:57 +0000 |
commit | ffbde252a850c7d96e1000e1be52792c41733a28 (patch) | |
tree | e668b7f764fb4981a802bc619e0b2ff62fa9ce16 /dhall/src/syntax/text/printer.rs | |
parent | e4b3a879907b6dcc75d25847ae21a23d0201aae1 (diff) | |
parent | 7cbfc1a0d32766a383d1f48902502adaa2234d2f (diff) |
Merge pull request #131 from Nadrieril/hir
Decouple main expression types
Diffstat (limited to 'dhall/src/syntax/text/printer.rs')
-rw-r--r-- | dhall/src/syntax/text/printer.rs | 47 |
1 files changed, 28 insertions, 19 deletions
diff --git a/dhall/src/syntax/text/printer.rs b/dhall/src/syntax/text/printer.rs index 06dd70f..8891d41 100644 --- a/dhall/src/syntax/text/printer.rs +++ b/dhall/src/syntax/text/printer.rs @@ -19,17 +19,17 @@ enum PrintPhase { // Wraps an Expr with a phase, so that phase selection can be done separate from the actual // printing. #[derive(Clone)] -struct PhasedExpr<'a, E>(&'a Expr<E>, PrintPhase); +struct PhasedExpr<'a>(&'a Expr, PrintPhase); -impl<'a, E: Display + Clone> PhasedExpr<'a, E> { - fn phase(self, phase: PrintPhase) -> PhasedExpr<'a, E> { +impl<'a> PhasedExpr<'a> { + fn phase(self, phase: PrintPhase) -> PhasedExpr<'a> { PhasedExpr(self.0, phase) } } -impl<E: Display + Clone> UnspannedExpr<E> { +impl UnspannedExpr { // Annotate subexpressions with the appropriate phase, defaulting to Base - fn annotate_with_phases<'a>(&'a self) -> ExprKind<PhasedExpr<'a, E>, E> { + fn annotate_with_phases<'a>(&'a self) -> ExprKind<PhasedExpr<'a>> { use crate::syntax::ExprKind::*; use PrintPhase::*; let with_base = self.map_ref(|e| PhasedExpr(e, Base)); @@ -134,7 +134,7 @@ where } /// Generic instance that delegates to subexpressions -impl<SE: Display + Clone, E: Display> Display for ExprKind<SE, E> { +impl<SE: Display + Clone> Display for ExprKind<SE> { fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { use crate::syntax::ExprKind::*; match self { @@ -196,15 +196,7 @@ impl<SE: Display + Clone, E: Display> Display for ExprKind<SE, E> { Var(a) => a.fmt(f)?, Const(k) => k.fmt(f)?, Builtin(v) => v.fmt(f)?, - BoolLit(true) => f.write_str("True")?, - BoolLit(false) => f.write_str("False")?, - NaturalLit(a) => a.fmt(f)?, - IntegerLit(a) if *a >= 0 => { - f.write_str("+")?; - a.fmt(f)?; - } - IntegerLit(a) => a.fmt(f)?, - DoubleLit(a) => a.fmt(f)?, + Lit(a) => a.fmt(f)?, TextLit(a) => a.fmt(f)?, RecordType(a) if a.is_empty() => f.write_str("{}")?, RecordType(a) => fmt_list("{ ", ", ", " }", a, f, |(k, t), f| { @@ -232,19 +224,36 @@ impl<SE: Display + Clone, E: Display> Display for ExprKind<SE, E> { write!(f, "{}::{}", a, b)?; } Import(a) => a.fmt(f)?, - Embed(a) => a.fmt(f)?, } Ok(()) } } -impl<E: Display + Clone> Display for Expr<E> { +impl Display for Expr { + fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { + self.kind().fmt_phase(f, PrintPhase::Base) + } +} + +impl Display for LitKind { fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { - self.as_ref().fmt_phase(f, PrintPhase::Base) + use LitKind::*; + match self { + Bool(true) => f.write_str("True")?, + Bool(false) => f.write_str("False")?, + Natural(a) => a.fmt(f)?, + Integer(a) if *a >= 0 => { + f.write_str("+")?; + a.fmt(f)?; + } + Integer(a) => a.fmt(f)?, + Double(a) => a.fmt(f)?, + } + Ok(()) } } -impl<'a, E: Display + Clone> Display for PhasedExpr<'a, E> { +impl<'a> Display for PhasedExpr<'a> { fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { self.0.as_ref().fmt_phase(f, self.1) } |