support parameters which use a type-of as the data type

CHANGELOG.md

@@ -19,6 +19,7 @@
 * Support bare delay controls with real number delays
 * Fix parsing of sized ports with implicit directions
 * Ensure arrays used in nested ternary expressions are properly flattened
+* Support parameters which use a type-of as the data type
 
 ## v0.0.8
 

src/Language/SystemVerilog/Parser/Parse.y

@@ -460,13 +460,13 @@ TypeAlias :: { Type }
   | Identifier ParamBindings "::" Identifier Dimensions { CSAlias $1 $2 $4 $5 }
 TypeNonIdent :: { Type }
   : PartialType OptSigning Dimensions { $1 $2 $3 }
-  | "type" "(" Expr ")" { TypeOf $3 }
 PartialType :: { Signing -> [Range] -> Type }
   : PartialTypeP { snd $1 }
 PartialTypeP :: { (Position, Signing -> [Range] -> Type) }
   : IntegerVectorTypeP { (fst $1, makeIntegerVector $1) }
   | IntegerAtomTypeP   { (fst $1, makeIntegerAtom   $1) }
   | NonIntegerTypeP    { (fst $1, makeNonInteger    $1) }
+  | "type" "(" Expr ")" { makeTypeOf $1 $3 }
   | "enum" EnumBaseType "{" EnumItems   "}" { makeComplex $1 $ Enum   $2 $4 }
   | "struct" Packing    "{" StructItems "}" { makeComplex $1 $ Struct $2 $4 }
   | "union"  Packing    "{" StructItems "}" { makeComplex $1 $ Union  $2 $4 }
@@ -652,7 +652,6 @@ DeclToken :: { DeclToken }
   | "[" Expr "]"                       { DTBit      (tokenPosition $1) $2 }
   | "." Identifier                     { DTDot      (tokenPosition $1) $2 }
   | "automatic"                        { DTLifetime (tokenPosition $1) Automatic }
-  | "type" "(" Expr ")"                { uncurry DTType $ makeTypeOf $1 $3 }
   | IncOrDecOperatorP                  { DTAsgn     (fst $1) (AsgnOp $ snd $1) Nothing (RawNum 1) }
   | IdentifierP               "::" Identifier { uncurry DTPSIdent $1    $3 }
   | IdentifierP ParamBindings "::" Identifier { uncurry DTCSIdent $1 $2 $4 }

test/core/param_typeof.sv

+module mod1;
+    parameter shortint X = 0;
+    parameter type(X) Y = 0;
+    initial $display("mod1 %0d %0d %b %b", X, Y, X, Y);
+endmodule
+
+module mod2 #(
+    parameter shortint X = 0,
+    parameter type(X) Y = 0
+);
+    initial $display("mod2 %0d %0d %b %b", X, Y, X, Y);
+endmodule

test/core/param_typeof.v

+module mod1;
+    parameter signed [15:0] X = 0;
+    parameter signed [15:0] Y = 0;
+    initial $display("mod1 %0d %0d %b %b", X, Y, X, Y);
+endmodule
+
+module mod2 #(
+    parameter signed [15:0] X = 0,
+    parameter signed [15:0] Y = 0
+);
+    initial $display("mod2 %0d %0d %b %b", X, Y, X, Y);
+endmodule

test/core/param_typeof_tb.v

+module top;
+    mod1           m1_a();
+    mod1 #( 1,  2) m1_b();
+    mod1 #( 0, -1) m1_c();
+    mod1 #(-3, -4) m1_d();
+    mod2           m2_a();
+    mod2 #( 1,  2) m2_b();
+    mod2 #( 0, -1) m2_c();
+    mod2 #(-3, -4) m2_d();
+endmodule