| // Copyright ©2019 The Gonum Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build ignore |
| |
| package main |
| |
| import ( |
| "bytes" |
| "go/ast" |
| "go/format" |
| "go/parser" |
| "go/token" |
| "io/ioutil" |
| "log" |
| "os" |
| "path/filepath" |
| "strings" |
| "text/template" |
| ) |
| |
| const definedTemplate = `// Code generated by "go generate gonum.org/v1/gonum/unit/constant”; DO NOT EDIT. |
| |
| // Copyright ©2019 The Gonum Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // +build ignore |
| |
| package main |
| |
| import "gonum.org/v1/gonum/unit" |
| |
| var definedTypes = []struct{ |
| unit unit.Uniter |
| name string |
| }{ |
| {{range .}} {unit: unit.{{.}}(1), name: "unit.{{.}}"{{"}"}}, |
| {{end}}} |
| |
| func definedEquivalentOf(q unit.Uniter) string { |
| for _, u := range definedTypes { |
| if unit.DimensionsMatch(q, u.unit) { |
| return u.name |
| } |
| } |
| return "" |
| } |
| ` |
| |
| var defined = template.Must(template.New("defined").Parse(definedTemplate)) |
| |
| func main() { |
| names, err := filepath.Glob("../*.go") |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| var units []string |
| fset := token.NewFileSet() |
| for _, fn := range names { |
| if strings.Contains(fn, "_test") { |
| continue |
| } |
| b, err := ioutil.ReadFile(fn) |
| if bytes.Contains(b, []byte("+build ignore")) { |
| continue |
| } |
| f, err := parser.ParseFile(fset, fn, nil, 0) |
| if err != nil { |
| log.Fatal("failed to parse %q: %v", fn, err) // parse error |
| } |
| if f.Name.Name != "unit" { |
| log.Fatalf("not parsing unit package: %q", f.Name.Name) |
| } |
| for _, d := range f.Decls { |
| if decl, ok := d.(*ast.GenDecl); ok { |
| for _, s := range decl.Specs { |
| if ts, ok := s.(*ast.TypeSpec); ok { |
| if id, ok := ts.Type.(*ast.Ident); !ok || id.Name != "float64" { |
| continue |
| } |
| units = append(units, ts.Name.Name) |
| } |
| } |
| } |
| } |
| } |
| |
| f, err := os.Create("defined_types.go") |
| if err != nil { |
| log.Fatal(err) |
| } |
| defer f.Close() |
| |
| var buf bytes.Buffer |
| err = defined.Execute(&buf, units) |
| if err != nil { |
| log.Fatal(err) |
| } |
| |
| b, err := format.Source(buf.Bytes()) |
| if err != nil { |
| f.Write(buf.Bytes()) // This is here to debug bad format. |
| log.Fatalf("error formatting %q: %s", f.Name(), err) |
| } |
| |
| f.Write(b) |
| } |