cl: support python; TestPyCall

cl/c.go

@@ -23,7 +23,8 @@ import (
 // -----------------------------------------------------------------------------
 
 const (
-	pathLibc = "github.com/goplus/llgo/c"
+	pathLibc  = "github.com/goplus/llgo/c"
+	pathLibpy = "github.com/goplus/llgo/py"
 )
 
 func simplifyGopPackage(pkgPath string) string {
@@ -37,7 +38,12 @@ func simplifyPkgPath(pkgPath string) string {
 	switch pkgPath {
 	case "c":
 		return pathLibc
+	case "py":
+		return pathLibpy
 	default:
+		if strings.HasPrefix(pkgPath, "py/") {
+			return pathLibpy + pkgPath[2:]
+		}
 		return simplifyGopPackage(pkgPath)
 	}
 }

cl/compile_llgo_test.go

@@ -24,7 +24,7 @@ func TestHelloLLGo(t *testing.T) {
 	gopClTest(t, `
 import "c"
 
-c.Printf C"Hello, world!\n"
+c.printf C"Hello, world!\n"
 `, `package main
 
 import "github.com/goplus/llgo/c"
@@ -34,3 +34,28 @@ func main() {
 }
 `)
 }
+
+func TestPyCall(t *testing.T) {
+	gopClTest(t, `
+import (
+	"c"
+	"py"
+	"py/math"
+)
+
+x := math.sqrt(py.float(2))
+c.printf C"sqrt(2) = %f\n", x.float64
+`, `package main
+
+import (
+	"github.com/goplus/llgo/c"
+	"github.com/goplus/llgo/py"
+	"github.com/goplus/llgo/py/math"
+)
+
+func main() {
+	x := math.Sqrt(py.Float(2))
+	c.Printf(c.Str("sqrt(2) = %f\n"), x.Float64())
+}
+`)
+}

testdata/_llgo/callpy/callpy.gop

@@ -0,0 +1,8 @@
+import (
+	"c"
+	"py"
+	"py/math"
+)
+
+x := math.sqrt(py.float(2))
+c.printf C"sqrt(2) = %f\n", x.float64

testdata/_llgo/hello/hello.gop

@@ -1,3 +1,3 @@
 import "c"
 
-c.Printf C"Hello world\n"
+c.printf C"Hello world\n"

testdata/_llgo/hellollgo/hello.gop

@@ -1,4 +1,4 @@
 import "c"
 
-c.Printf C"Hello, llgo!\n"
-c.Fprintf c.Stderr, C"Hi, %7.1f\n", 3.14
+c.printf C"Hello, llgo!\n"
+c.fprintf c.Stderr, C"Hi, %7.1f\n", 3.14