/
llgen.go
88 lines (74 loc) · 1.93 KB
/
llgen.go
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/*
* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package llgen
import (
"go/ast"
"go/parser"
"go/token"
"go/types"
"os"
"github.com/goplus/gogen/packages"
"github.com/goplus/llgo/cl"
"github.com/goplus/llgo/internal/mod"
"golang.org/x/tools/go/ssa"
"golang.org/x/tools/go/ssa/ssautil"
llssa "github.com/goplus/llgo/ssa"
)
func Init() {
llssa.Initialize(llssa.InitAll)
llssa.SetDebug(llssa.DbgFlagAll)
cl.SetDebug(cl.DbgFlagAll)
}
func PkgPath(dir string) string {
_, pkgPath, err := mod.Load(dir)
check(err)
return pkgPath
}
func Do(pkgPath, inFile, outFile string) {
ret := Gen(pkgPath, inFile, nil)
err := os.WriteFile(outFile, []byte(ret), 0644)
check(err)
}
func Gen(pkgPath, inFile string, src any) string {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, inFile, src, parser.ParseComments)
check(err)
files := []*ast.File{f}
name := f.Name.Name
if pkgPath == "" {
pkgPath = name
}
pkg := types.NewPackage(pkgPath, name)
imp := packages.NewImporter(fset)
ssaPkg, _, err := ssautil.BuildPackage(
&types.Config{Importer: imp}, fset, pkg, files, ssa.SanityCheckFunctions)
check(err)
if Verbose {
ssaPkg.WriteTo(os.Stderr)
}
prog := llssa.NewProgram(nil)
ret, err := cl.NewPackage(prog, ssaPkg, files)
check(err)
return ret.String()
}
func check(err error) {
if err != nil {
panic(err)
}
}
var (
Verbose = true
)