lapack/netlib: autogenerate errors strings from gonum copy

.travis/check-generate.sh

@@ -3,6 +3,7 @@ set -ex
 
 go generate gonum.org/v1/netlib/blas/netlib
 go generate gonum.org/v1/netlib/lapack/lapacke
+go generate gonum.org/v1/netlib/lapack/netlib
 if [ -n "$(git diff)" ]; then
 	exit 1
 fi

lapack/netlib/generate.go

@@ -0,0 +1,7 @@
+// Copyright ©2018 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.
+
+//go:generate go run generate_errors.go
+
+package netlib

lapack/netlib/generate_errors.go

@@ -0,0 +1,57 @@
+// Copyright ©2018 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 (
+	"fmt"
+	"go/parser"
+	"go/printer"
+	"go/token"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+const errorFile = "../../../gonum/lapack/gonum/errors.go"
+
+func main() {
+	path, err := filepath.Abs(errorFile)
+	if err != nil {
+		log.Fatalf("no absolute path for %q: %v", errorFile, err)
+	}
+
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, path, nil, 0)
+	if err != nil {
+		log.Fatalf("failed to parse %q: %v", path, err)
+	}
+
+	dst := filepath.Base(errorFile)
+	o, err := os.Create(dst)
+	if err != nil {
+		log.Fatalf("failed to create %q: %v", dst, err)
+	}
+	defer o.Close()
+
+	fmt.Fprintln(o, header)
+	p := printer.Config{
+		Mode:     printer.UseSpaces | printer.TabIndent,
+		Tabwidth: 8,
+	}
+	p.Fprint(o, fset, f.Decls)
+	fmt.Fprintln(o)
+}
+
+const header = `// Code generated by "go generate gonum.org/v1/netlib/lapack/netlib”; DO NOT EDIT.
+
+// Copyright ©2018 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.
+
+package netlib
+
+// Copied from gonum/lapack/gonum. Keep in sync.`

lapack/netlib/lapack.go

@@ -13,67 +13,6 @@ import (
 	"gonum.org/v1/netlib/lapack/lapacke"
 )
 
-// Copied from gonum/lapack/gonum. Keep in sync.
-const (
-	absIncNotOne  = "lapack: increment not one or negative one"
-	badAlpha      = "lapack: bad alpha length"
-	badApplyOrtho = "lapack: bad ApplyOrtho"
-	badAuxv       = "lapack: auxv has insufficient length"
-	badBeta       = "lapack: bad beta length"
-	badD          = "lapack: d has insufficient length"
-	badDiag       = "lapack: bad diag"
-	badDims       = "lapack: bad input dimensions"
-	badDirect     = "lapack: bad direct"
-	badE          = "lapack: e has insufficient length"
-	badEVComp     = "lapack: bad EVComp"
-	badEVHowMany  = "lapack: bad EVHowMany"
-	badEVJob      = "lapack: bad EVJob"
-	badEVSide     = "lapack: bad EVSide"
-	badGenOrtho   = "lapack: bad GenOrtho"
-	badGSVDJob    = "lapack: bad GSVDJob"
-	badIlo        = "lapack: ilo out of range"
-	badIhi        = "lapack: ihi out of range"
-	badIpiv       = "lapack: bad permutation length"
-	badBalanceJob = "lapack: bad BalanceJob"
-	badK1         = "lapack: k1 out of range"
-	badK2         = "lapack: k2 out of range"
-	badKperm      = "lapack: incorrect permutation length"
-	badLdA        = "lapack: index of a out of range"
-	badNb         = "lapack: nb out of range"
-	badNorm       = "lapack: bad norm"
-	badPivot      = "lapack: bad pivot"
-	badS          = "lapack: s has insufficient length"
-	badSchurComp  = "lapack: bad SchurComp"
-	badSchurJob   = "lapack: bad SchurJob"
-	badShifts     = "lapack: bad shifts"
-	badSide       = "lapack: bad side"
-	badSlice      = "lapack: bad input slice length"
-	badSort       = "lapack: bad Sort"
-	badStore      = "lapack: bad store"
-	badTau        = "lapack: tau has insufficient length"
-	badTauQ       = "lapack: tauQ has insufficient length"
-	badTauP       = "lapack: tauP has insufficient length"
-	badTrans      = "lapack: bad trans"
-	badVn1        = "lapack: vn1 has insufficient length"
-	badVn2        = "lapack: vn2 has insufficient length"
-	badUplo       = "lapack: illegal triangle"
-	badWork       = "lapack: insufficient working memory"
-	badZ          = "lapack: insufficient z length"
-	kGTM          = "lapack: k > m"
-	kGTN          = "lapack: k > n"
-	kLT0          = "lapack: k < 0"
-	mLT0          = "lapack: m < 0"
-	mLTN          = "lapack: m < n"
-	nanScale      = "lapack: NaN scale factor"
-	negDimension  = "lapack: negative matrix dimension"
-	negZ          = "lapack: negative z value"
-	nLT0          = "lapack: n < 0"
-	nLTM          = "lapack: n < m"
-	offsetGTM     = "lapack: offset > m"
-	shortWork     = "lapack: working array shorter than declared"
-	zeroDiv       = "lapack: zero divisor"
-)
-
 func min(m, n int) int {
 	if m < n {
 		return m