go/types: add test cases for generic constraints, types and functions

Dups: #60856
For #60817

Change-Id: Ic0710758e170d6ceed66649fec08ef8054be4d6b
GitHub-Last-Rev: 8bbc76a
GitHub-Pull-Request: #61664
Reviewed-on: https://go-review.googlesource.com/c/go/+/514255
Reviewed-by: Matthew Dempsky <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Reviewed-by: Robert Griesemer <[email protected]>
Run-TryBot: Robert Griesemer <[email protected]>
Auto-Submit: Robert Griesemer <[email protected]>

Author: Hiro

src/cmd/compile/internal/syntax/printer_test.go

@@ -169,6 +169,7 @@ var exprTests = [][2]string{
 	dup(`'a'`),
 	dup(`"foo"`),
 	dup("`bar`"),
+	dup("any"),
 
 	// func and composite literals
 	dup("func() {}"),
@@ -197,12 +198,18 @@ var exprTests = [][2]string{
 	// new interfaces
 	dup("interface{int}"),
 	dup("interface{~int}"),
-	dup("interface{~int}"),
+
+	// generic constraints
+	dup("interface{~a | ~b | ~c; ~int | ~string; float64; m()}"),
 	dup("interface{int | string}"),
 	dup("interface{~int | ~string; float64; m()}"),
-	dup("interface{~a | ~b | ~c; ~int | ~string; float64; m()}"),
 	dup("interface{~T[int, string] | string}"),
 
+	// generic types
+	dup("x[T]"),
+	dup("x[N | A | S]"),
+	dup("x[N, A]"),
+
 	// non-type expressions
 	dup("(x)"),
 	dup("x.f"),
@@ -250,6 +257,12 @@ var exprTests = [][2]string{
 	dup("f(s...)"),
 	dup("f(a, s...)"),
 
+	// generic functions
+	dup("f[T]()"),
+	dup("f[T](T)"),
+	dup("f[T, T1]()"),
+	dup("f[T, T1](T, T1)"),
+
 	dup("*x"),
 	dup("&x"),
 	dup("x + y"),

src/go/types/exprstring_test.go

@@ -21,6 +21,7 @@ var testExprs = []testEntry{
 	dup(`'a'`),
 	dup(`"foo"`),
 	dup("`bar`"),
+	dup("any"),
 
 	// func and composite literals
 	{"func(){}", "(func() literal)"},
@@ -46,14 +47,18 @@ var testExprs = []testEntry{
 	// new interfaces
 	dup("interface{int}"),
 	dup("interface{~int}"),
-	dup("interface{~int}"),
+
+	// generic constraints
+	dup("interface{~a | ~b | ~c; ~int | ~string; float64; m()}"),
 	dup("interface{int | string}"),
 	dup("interface{~int | ~string; float64; m()}"),
-
-	// See above.
-	// dup("interface{type a, b, c; ~int | ~string; float64; m()}"),
 	dup("interface{~T[int, string] | string}"),
 
+	// generic types
+	dup("x[T]"),
+	dup("x[N | A | S]"),
+	dup("x[N, A]"),
+
 	// non-type expressions
 	dup("(x)"),
 	dup("x.f"),
@@ -101,6 +106,12 @@ var testExprs = []testEntry{
 	dup("f(s...)"),
 	dup("f(a, s...)"),
 
+	// generic functions
+	dup("f[T]()"),
+	dup("f[T](T)"),
+	dup("f[T, T1]()"),
+	dup("f[T, T1](T, T1)"),
+
 	dup("*x"),
 	dup("&x"),
 	dup("x + y"),