Propegate HIR and AST f16 and f128 types to rustdoc

Author: tgross35

src/librustdoc/clean/types.rs

@@ -1777,8 +1777,10 @@ impl PrimitiveType {
             hir::PrimTy::Uint(UintTy::U32) => PrimitiveType::U32,
             hir::PrimTy::Uint(UintTy::U64) => PrimitiveType::U64,
             hir::PrimTy::Uint(UintTy::U128) => PrimitiveType::U128,
+            hir::PrimTy::Float(FloatTy::F16) => PrimitiveType::F16,
             hir::PrimTy::Float(FloatTy::F32) => PrimitiveType::F32,
             hir::PrimTy::Float(FloatTy::F64) => PrimitiveType::F64,
+            hir::PrimTy::Float(FloatTy::F128) => PrimitiveType::F128,
             hir::PrimTy::Str => PrimitiveType::Str,
             hir::PrimTy::Bool => PrimitiveType::Bool,
             hir::PrimTy::Char => PrimitiveType::Char,
@@ -1977,8 +1979,10 @@ impl From<ast::UintTy> for PrimitiveType {
 impl From<ast::FloatTy> for PrimitiveType {
     fn from(float_ty: ast::FloatTy) -> PrimitiveType {
         match float_ty {
+            ast::FloatTy::F16 => PrimitiveType::F16,
             ast::FloatTy::F32 => PrimitiveType::F32,
             ast::FloatTy::F64 => PrimitiveType::F64,
+            ast::FloatTy::F128 => PrimitiveType::F128,
         }
     }
 }