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gen_program_expressions.go
698 lines (641 loc) 路 20.2 KB
/
gen_program_expressions.go
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package nodejs
import (
"bytes"
"fmt"
"io"
"math/big"
"strings"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/hcl/v2/hclsyntax"
"github.com/zclconf/go-cty/cty"
"github.com/zclconf/go-cty/cty/convert"
"github.com/pulumi/pulumi/pkg/v3/codegen/hcl2/model"
"github.com/pulumi/pulumi/pkg/v3/codegen/pcl"
"github.com/pulumi/pulumi/pkg/v3/codegen/schema"
"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
)
type nameInfo int
func (nameInfo) Format(name string) string {
return makeValidIdentifier(name)
}
func (g *generator) lowerExpression(expr model.Expression, typ model.Type) model.Expression {
// TODO(pdg): diagnostics
if g.asyncMain {
expr = g.awaitInvokes(expr)
}
expr = pcl.RewritePropertyReferences(expr)
expr, diags := pcl.RewriteApplies(expr, nameInfo(0), !g.asyncMain)
if typ != nil {
var convertDiags hcl.Diagnostics
expr, convertDiags = pcl.RewriteConversions(expr, typ)
diags = diags.Extend(convertDiags)
}
expr, lowerProxyDiags := g.lowerProxyApplies(expr)
diags = diags.Extend(lowerProxyDiags)
g.diagnostics = g.diagnostics.Extend(diags)
return expr
}
func (g *generator) GetPrecedence(expr model.Expression) int {
// Precedence is derived from
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence.
switch expr := expr.(type) {
case *model.ConditionalExpression:
return 4
case *model.BinaryOpExpression:
switch expr.Operation {
case hclsyntax.OpLogicalOr:
return 5
case hclsyntax.OpLogicalAnd:
return 6
case hclsyntax.OpEqual, hclsyntax.OpNotEqual:
return 11
case hclsyntax.OpGreaterThan, hclsyntax.OpGreaterThanOrEqual, hclsyntax.OpLessThan,
hclsyntax.OpLessThanOrEqual:
return 12
case hclsyntax.OpAdd, hclsyntax.OpSubtract:
return 14
case hclsyntax.OpMultiply, hclsyntax.OpDivide, hclsyntax.OpModulo:
return 15
default:
contract.Failf("unexpected binary expression %v", expr)
}
case *model.UnaryOpExpression:
return 17
case *model.FunctionCallExpression:
switch expr.Name {
case intrinsicAwait:
return 17
case intrinsicInterpolate:
return 22
default:
return 20
}
case *model.ForExpression, *model.IndexExpression, *model.RelativeTraversalExpression, *model.SplatExpression,
*model.TemplateJoinExpression:
return 20
case *model.AnonymousFunctionExpression, *model.LiteralValueExpression, *model.ObjectConsExpression,
*model.ScopeTraversalExpression, *model.TemplateExpression, *model.TupleConsExpression:
return 22
default:
contract.Failf("unexpected expression %v of type %T", expr, expr)
}
return 0
}
func (g *generator) GenAnonymousFunctionExpression(w io.Writer, expr *model.AnonymousFunctionExpression) {
switch len(expr.Signature.Parameters) {
case 0:
g.Fgen(w, "()")
case 1:
g.Fgenf(w, "%s", expr.Signature.Parameters[0].Name)
default:
g.Fgen(w, "([")
for i, p := range expr.Signature.Parameters {
if i > 0 {
g.Fgen(w, ", ")
}
g.Fgenf(w, "%s", p.Name)
}
g.Fgen(w, "])")
}
g.Fgenf(w, " => %.v", expr.Body)
}
func (g *generator) GenBinaryOpExpression(w io.Writer, expr *model.BinaryOpExpression) {
opstr, precedence := "", g.GetPrecedence(expr)
switch expr.Operation {
case hclsyntax.OpAdd:
opstr = "+"
case hclsyntax.OpDivide:
opstr = "/"
case hclsyntax.OpEqual:
opstr = "=="
case hclsyntax.OpGreaterThan:
opstr = ">"
case hclsyntax.OpGreaterThanOrEqual:
opstr = ">="
case hclsyntax.OpLessThan:
opstr = "<"
case hclsyntax.OpLessThanOrEqual:
opstr = "<="
case hclsyntax.OpLogicalAnd:
opstr = "&&"
case hclsyntax.OpLogicalOr:
opstr = "||"
case hclsyntax.OpModulo:
opstr = "%"
case hclsyntax.OpMultiply:
opstr = "*"
case hclsyntax.OpNotEqual:
opstr = "!="
case hclsyntax.OpSubtract:
opstr = "-"
default:
opstr, precedence = ",", 1
}
g.Fgenf(w, "%.[1]*[2]v %[3]v %.[1]*[4]o", precedence, expr.LeftOperand, opstr, expr.RightOperand)
}
func (g *generator) GenConditionalExpression(w io.Writer, expr *model.ConditionalExpression) {
g.Fgenf(w, "%.4v ? %.4v : %.4v", expr.Condition, expr.TrueResult, expr.FalseResult)
}
func (g *generator) GenForExpression(w io.Writer, expr *model.ForExpression) {
switch expr.Collection.Type().(type) {
case *model.ListType, *model.TupleType:
if expr.KeyVariable == nil {
g.Fgenf(w, "%.20v", expr.Collection)
} else {
g.Fgenf(w, "%.20v.map((v, k) => [k, v])", expr.Collection)
}
case *model.MapType, *model.ObjectType:
if expr.KeyVariable == nil {
g.Fgenf(w, "Object.values(%.v)", expr.Collection)
} else {
g.Fgenf(w, "Object.entries(%.v)", expr.Collection)
}
}
fnParams, reduceParams := expr.ValueVariable.Name, expr.ValueVariable.Name
if expr.KeyVariable != nil {
reduceParams = fmt.Sprintf("[%.v, %.v]", expr.KeyVariable.Name, expr.ValueVariable.Name)
fnParams = fmt.Sprintf("(%v)", reduceParams)
}
if expr.Condition != nil {
g.Fgenf(w, ".filter(%s => %.v)", fnParams, expr.Condition)
}
if expr.Key != nil {
// TODO(pdg): grouping
g.Fgenf(w, ".reduce((__obj, %s) => { ...__obj, [%.v]: %.v })", reduceParams, expr.Key, expr.Value)
} else {
g.Fgenf(w, ".map(%s => %.v)", fnParams, expr.Value)
}
}
func (g *generator) genApply(w io.Writer, expr *model.FunctionCallExpression) {
// Extract the list of outputs and the continuation expression from the `__apply` arguments.
applyArgs, then := pcl.ParseApplyCall(expr)
// If all of the arguments are promises, use promise methods. If any argument is an output, convert all other args
// to outputs and use output methods.
anyOutputs := false
for _, arg := range applyArgs {
if isOutputType(arg.Type()) {
anyOutputs = true
}
}
apply, all := "then", "Promise.all"
if anyOutputs {
apply, all = "apply", "pulumi.all"
}
if len(applyArgs) == 1 {
// If we only have a single output, just generate a normal `.apply` or `.then`.
g.Fgenf(w, "%.20v.%v(%.v)", applyArgs[0], apply, then)
} else {
// Otherwise, generate a call to `pulumi.all([]).apply()`.
g.Fgenf(w, "%v([", all)
for i, o := range applyArgs {
if i > 0 {
g.Fgen(w, ", ")
}
g.Fgenf(w, "%v", o)
}
g.Fgenf(w, "]).%v(%.v)", apply, then)
}
}
// functionName computes the NodeJS package, module, and name for the given function token.
func functionName(tokenArg model.Expression) (string, string, string, hcl.Diagnostics) {
token := tokenArg.(*model.TemplateExpression).Parts[0].(*model.LiteralValueExpression).Value.AsString()
tokenRange := tokenArg.SyntaxNode().Range()
// Compute the resource type from the Pulumi type token.
pkg, module, member, diagnostics := pcl.DecomposeToken(token, tokenRange)
return pkg, strings.Replace(module, "/", ".", -1), member, diagnostics
}
func (g *generator) genRange(w io.Writer, call *model.FunctionCallExpression, entries bool) {
var from, to model.Expression
switch len(call.Args) {
case 1:
from, to = &model.LiteralValueExpression{Value: cty.NumberIntVal(0)}, call.Args[0]
case 2:
from, to = call.Args[0], call.Args[1]
default:
contract.Failf("expected range() to have exactly 1 or 2 args; got %v", len(call.Args))
}
genPrefix := func() { g.Fprint(w, "((from, to) => (new Array(to - from))") }
mapValue := "from + i"
genSuffix := func() { g.Fgenf(w, ")(%.v, %.v)", from, to) }
if litFrom, ok := from.(*model.LiteralValueExpression); ok {
fromV, err := convert.Convert(litFrom.Value, cty.Number)
contract.Assert(err == nil)
from, _ := fromV.AsBigFloat().Int64()
if litTo, ok := to.(*model.LiteralValueExpression); ok {
toV, err := convert.Convert(litTo.Value, cty.Number)
contract.Assert(err == nil)
to, _ := toV.AsBigFloat().Int64()
if from == 0 {
mapValue = "i"
} else {
mapValue = fmt.Sprintf("%d + i", from)
}
genPrefix = func() { g.Fprintf(w, "(new Array(%d))", to-from) }
genSuffix = func() {}
} else if from == 0 {
genPrefix = func() { g.Fgenf(w, "(new Array(%.v))", to) }
mapValue = "i"
genSuffix = func() {}
}
}
if entries {
mapValue = fmt.Sprintf("{key: %[1]s, value: %[1]s}", mapValue)
}
genPrefix()
g.Fprintf(w, ".map((_, i) => %v)", mapValue)
genSuffix()
}
var functionImports = map[string][]string{
intrinsicInterpolate: {"@pulumi/pulumi"},
"fileArchive": {"@pulumi/pulumi"},
"remoteArchive": {"@pulumi/pulumi"},
"assetArchive": {"@pulumi/pulumi"},
"fileAsset": {"@pulumi/pulumi"},
"stringAsset": {"@pulumi/pulumi"},
"remoteAsset": {"@pulumi/pulumi"},
"filebase64": {"fs"},
"filebase64sha256": {"fs", "crypto"},
"readFile": {"fs"},
"readDir": {"fs"},
"sha1": {"crypto"},
}
func (g *generator) getFunctionImports(x *model.FunctionCallExpression) []string {
if x.Name != pcl.Invoke {
return functionImports[x.Name]
}
pkg, _, _, diags := functionName(x.Args[0])
contract.Assert(len(diags) == 0)
return []string{"@pulumi/" + pkg}
}
func enumName(enum *model.EnumType) (string, error) {
components := strings.Split(enum.Token, ":")
contract.Assertf(len(components) == 3, "malformed token %v", enum.Token)
name := tokenToName(enum.Token)
pkg := makeValidIdentifier(components[0])
e, ok := pcl.GetSchemaForType(enum)
if !ok {
return "", fmt.Errorf("Could not get associated enum")
}
if name := e.(*schema.EnumType).Package.Language["nodejs"].(NodePackageInfo).PackageName; name != "" {
pkg = name
}
if mod := components[1]; mod != "" && mod != "index" {
if pkg := e.(*schema.EnumType).Package; pkg != nil {
mod = moduleName(mod, pkg)
}
pkg += "." + mod
}
return fmt.Sprintf("%s.%s", pkg, name), nil
}
func (g *generator) GenFunctionCallExpression(w io.Writer, expr *model.FunctionCallExpression) {
switch expr.Name {
case pcl.IntrinsicConvert:
from := expr.Args[0]
to := pcl.LowerConversion(from, expr.Signature.ReturnType)
output, isOutput := to.(*model.OutputType)
if isOutput {
to = output.ElementType
}
switch to := to.(type) {
case *model.EnumType:
if enum, err := enumName(to); err == nil {
if isOutput {
g.Fgenf(w, "%.v.apply((x) => %s[x])", from, enum)
} else {
pcl.GenEnum(to, from, func(member *schema.Enum) {
memberTag, err := enumMemberName(tokenToName(to.Token), member)
contract.AssertNoErrorf(err, "Failed to get member name on enum '%s'", enum)
g.Fgenf(w, "%s.%s", enum, memberTag)
}, func(from model.Expression) {
g.Fgenf(w, "%s[%.v]", enum, from)
})
}
} else {
g.Fgenf(w, "%v", from)
}
default:
g.Fgenf(w, "%v", from)
}
case pcl.IntrinsicApply:
g.genApply(w, expr)
case intrinsicAwait:
g.Fgenf(w, "await %.17v", expr.Args[0])
case intrinsicInterpolate:
g.Fgen(w, "pulumi.interpolate`")
for _, part := range expr.Args {
if lit, ok := part.(*model.LiteralValueExpression); ok && model.StringType.AssignableFrom(lit.Type()) {
g.Fgen(w, lit.Value.AsString())
} else {
g.Fgenf(w, "${%.v}", part)
}
}
g.Fgen(w, "`")
case "element":
g.Fgenf(w, "%.20v[%.v]", expr.Args[0], expr.Args[1])
case "entries":
switch model.ResolveOutputs(expr.Args[0].Type()).(type) {
case *model.ListType, *model.TupleType:
if call, ok := expr.Args[0].(*model.FunctionCallExpression); ok && call.Name == "range" {
g.genRange(w, call, true)
return
}
// Mapping over a list with a tuple receiver accepts (value, index).
g.Fgenf(w, "%.20v.map((v, k)", expr.Args[0])
case *model.MapType, *model.ObjectType:
g.Fgenf(w, "Object.entries(%.v).map(([k, v])", expr.Args[0])
}
g.Fgenf(w, " => ({key: k, value: v}))")
case "fileArchive":
g.Fgenf(w, "new pulumi.asset.FileArchive(%.v)", expr.Args[0])
case "remoteArchive":
g.Fgenf(w, "new pulumi.asset.RemoteArchive(%.v)", expr.Args[0])
case "assetArchive":
g.Fgenf(w, "new pulumi.asset.AssetArchive(%.v)", expr.Args[0])
case "fileAsset":
g.Fgenf(w, "new pulumi.asset.FileAsset(%.v)", expr.Args[0])
case "stringAsset":
g.Fgenf(w, "new pulumi.asset.StringAsset(%.v)", expr.Args[0])
case "remoteAsset":
g.Fgenf(w, "new pulumi.asset.RemoteAsset(%.v)", expr.Args[0])
case "filebase64":
g.Fgenf(w, "Buffer.from(fs.readFileSync(%v), 'binary').toString('base64')", expr.Args[0])
case "filebase64sha256":
// Assuming the existence of the following helper method
g.Fgenf(w, "computeFilebase64sha256(%v)", expr.Args[0])
case pcl.Invoke:
pkg, module, fn, diags := functionName(expr.Args[0])
contract.Assert(len(diags) == 0)
if module != "" {
module = "." + module
}
isOut := pcl.IsOutputVersionInvokeCall(expr)
name := fmt.Sprintf("%s%s.%s", makeValidIdentifier(pkg), module, fn)
if isOut {
name = fmt.Sprintf("%sOutput", name)
}
g.Fprintf(w, "%s(", name)
if len(expr.Args) >= 2 {
g.Fgenf(w, "%.v", expr.Args[1])
}
if len(expr.Args) == 3 {
g.Fgenf(w, ", %.v", expr.Args[2])
}
g.Fprint(w, ")")
case "join":
g.Fgenf(w, "%.20v.join(%v)", expr.Args[1], expr.Args[0])
case "length":
g.Fgenf(w, "%.20v.length", expr.Args[0])
case "lookup":
g.Fgenf(w, "%v[%v]", expr.Args[0], expr.Args[1])
if len(expr.Args) == 3 {
g.Fgenf(w, " || %v", expr.Args[2])
}
case "range":
g.genRange(w, expr, false)
case "readFile":
g.Fgenf(w, "fs.readFileSync(%v)", expr.Args[0])
case "readDir":
g.Fgenf(w, "fs.readDirSync(%v)", expr.Args[0])
case "secret":
g.Fgenf(w, "pulumi.secret(%v)", expr.Args[0])
case "split":
g.Fgenf(w, "%.20v.split(%v)", expr.Args[1], expr.Args[0])
case "toBase64":
g.Fgenf(w, "Buffer.from(%v).toString(\"base64\")", expr.Args[0])
case "fromBase64":
g.Fgenf(w, "Buffer.from(%v, \"base64\").toString(\"utf8\")", expr.Args[0])
case "toJSON":
g.Fgenf(w, "JSON.stringify(%v)", expr.Args[0])
case "sha1":
g.Fgenf(w, "crypto.createHash('sha1').update(%v).digest('hex')", expr.Args[0])
case "stack":
g.Fgenf(w, "pulumi.getStack()")
case "project":
g.Fgenf(w, "pulumi.getProject()")
case "cwd":
g.Fgen(w, "process.cwd()")
default:
var rng hcl.Range
if expr.Syntax != nil {
rng = expr.Syntax.Range()
}
g.genNYI(w, "FunctionCallExpression: %v (%v)", expr.Name, rng)
}
}
func (g *generator) GenIndexExpression(w io.Writer, expr *model.IndexExpression) {
g.Fgenf(w, "%.20v[%.v]", expr.Collection, expr.Key)
}
func (g *generator) genStringLiteral(w io.Writer, v string) {
builder := strings.Builder{}
newlines := strings.Count(v, "\n")
if newlines == 0 || newlines == 1 && (v[0] == '\n' || v[len(v)-1] == '\n') {
// This string either does not contain newlines or contains a single leading or trailing newline, so we'll
// Generate a normal string literal. Quotes, backslashes, and newlines will be escaped in conformance with
// ECMA-262 11.8.4 ("String Literals").
builder.WriteRune('"')
for _, c := range v {
if c == '\n' {
builder.WriteString(`\n`)
} else {
if c == '"' || c == '\\' {
builder.WriteRune('\\')
}
builder.WriteRune(c)
}
}
builder.WriteRune('"')
} else {
// This string does contain newlines, so we'll Generate a template string literal. "${", backquotes, and
// backslashes will be escaped in conformance with ECMA-262 11.8.6 ("Template Literal Lexical Components").
runes := []rune(v)
builder.WriteRune('`')
for i, c := range runes {
switch c {
case '$':
if i < len(runes)-1 && runes[i+1] == '{' {
builder.WriteRune('\\')
}
case '`', '\\':
builder.WriteRune('\\')
}
builder.WriteRune(c)
}
builder.WriteRune('`')
}
g.Fgenf(w, "%s", builder.String())
}
func (g *generator) GenLiteralValueExpression(w io.Writer, expr *model.LiteralValueExpression) {
typ := expr.Type()
if cns, ok := typ.(*model.ConstType); ok {
typ = cns.Type
}
switch typ {
case model.BoolType:
g.Fgenf(w, "%v", expr.Value.True())
case model.NoneType:
g.Fgen(w, "undefined")
case model.NumberType:
bf := expr.Value.AsBigFloat()
if i, acc := bf.Int64(); acc == big.Exact {
g.Fgenf(w, "%d", i)
} else {
f, _ := bf.Float64()
g.Fgenf(w, "%g", f)
}
case model.StringType:
g.genStringLiteral(w, expr.Value.AsString())
default:
contract.Failf("unexpected literal type in GenLiteralValueExpression: %v (%v)", expr.Type(),
expr.SyntaxNode().Range())
}
}
func (g *generator) literalKey(x model.Expression) (string, bool) {
strKey := ""
switch x := x.(type) {
case *model.LiteralValueExpression:
if model.StringType.AssignableFrom(x.Type()) {
strKey = x.Value.AsString()
break
}
var buf bytes.Buffer
g.GenLiteralValueExpression(&buf, x)
return buf.String(), true
case *model.TemplateExpression:
if len(x.Parts) == 1 {
if lit, ok := x.Parts[0].(*model.LiteralValueExpression); ok && model.StringType.AssignableFrom(lit.Type()) {
strKey = lit.Value.AsString()
break
}
}
var buf bytes.Buffer
g.GenTemplateExpression(&buf, x)
return buf.String(), true
default:
return "", false
}
if isLegalIdentifier(strKey) {
return strKey, true
}
return fmt.Sprintf("%q", strKey), true
}
func (g *generator) GenObjectConsExpression(w io.Writer, expr *model.ObjectConsExpression) {
if len(expr.Items) == 0 {
g.Fgen(w, "{}")
} else {
g.Fgen(w, "{")
g.Indented(func() {
for _, item := range expr.Items {
g.Fgenf(w, "\n%s", g.Indent)
if lit, ok := g.literalKey(item.Key); ok {
g.Fgenf(w, "%s", lit)
} else {
g.Fgenf(w, "[%.v]", item.Key)
}
g.Fgenf(w, ": %.v,", item.Value)
}
})
g.Fgenf(w, "\n%s}", g.Indent)
}
}
func (g *generator) genRelativeTraversal(w io.Writer, traversal hcl.Traversal, parts []model.Traversable) {
for i, part := range traversal {
var key cty.Value
switch part := part.(type) {
case hcl.TraverseAttr:
key = cty.StringVal(part.Name)
case hcl.TraverseIndex:
key = part.Key
default:
contract.Failf("unexpected traversal part of type %T (%v)", part, part.SourceRange())
}
var indexPrefix string
if model.IsOptionalType(model.GetTraversableType(parts[i])) {
g.Fgen(w, "?")
// `expr?[expr]` is not valid typescript, since it looks like a ternary
// operator.
//
// Typescript solves this by inserting a `.` in before the `[`: `expr?.[expr]`
//
// We need to do the same when generating index based expressions.
indexPrefix = "."
}
genIndex := func(inner string, value interface{}) {
g.Fgenf(w, "%s["+inner+"]", indexPrefix, value)
}
switch key.Type() {
case cty.String:
keyVal := key.AsString()
if isLegalIdentifier(keyVal) {
g.Fgenf(w, ".%s", keyVal)
} else {
genIndex("%q", keyVal)
}
case cty.Number:
idx, _ := key.AsBigFloat().Int64()
genIndex("%d", idx)
default:
genIndex("%q", key.AsString())
}
}
}
func (g *generator) GenRelativeTraversalExpression(w io.Writer, expr *model.RelativeTraversalExpression) {
g.Fgenf(w, "%.20v", expr.Source)
g.genRelativeTraversal(w, expr.Traversal, expr.Parts)
}
func (g *generator) GenScopeTraversalExpression(w io.Writer, expr *model.ScopeTraversalExpression) {
rootName := makeValidIdentifier(expr.RootName)
if _, ok := expr.Parts[0].(*model.SplatVariable); ok {
rootName = "__item"
}
g.Fgen(w, rootName)
g.genRelativeTraversal(w, expr.Traversal.SimpleSplit().Rel, expr.Parts)
}
func (g *generator) GenSplatExpression(w io.Writer, expr *model.SplatExpression) {
g.Fgenf(w, "%.20v.map(__item => %.v)", expr.Source, expr.Each)
}
func (g *generator) GenTemplateExpression(w io.Writer, expr *model.TemplateExpression) {
if len(expr.Parts) == 1 {
if lit, ok := expr.Parts[0].(*model.LiteralValueExpression); ok && model.StringType.AssignableFrom(lit.Type()) {
g.GenLiteralValueExpression(w, lit)
return
}
}
g.Fgen(w, "`")
for _, expr := range expr.Parts {
if lit, ok := expr.(*model.LiteralValueExpression); ok && model.StringType.AssignableFrom(lit.Type()) {
g.Fgen(w, lit.Value.AsString())
} else {
g.Fgenf(w, "${%.v}", expr)
}
}
g.Fgen(w, "`")
}
func (g *generator) GenTemplateJoinExpression(w io.Writer, expr *model.TemplateJoinExpression) {
g.genNYI(w, "TemplateJoinExpression")
}
func (g *generator) GenTupleConsExpression(w io.Writer, expr *model.TupleConsExpression) {
switch len(expr.Expressions) {
case 0:
g.Fgen(w, "[]")
case 1:
g.Fgenf(w, "[%.v]", expr.Expressions[0])
default:
g.Fgen(w, "[")
g.Indented(func() {
for _, v := range expr.Expressions {
g.Fgenf(w, "\n%s%.v,", g.Indent, v)
}
})
g.Fgen(w, "\n", g.Indent, "]")
}
}
func (g *generator) GenUnaryOpExpression(w io.Writer, expr *model.UnaryOpExpression) {
opstr, precedence := "", g.GetPrecedence(expr)
switch expr.Operation {
case hclsyntax.OpLogicalNot:
opstr = "!"
case hclsyntax.OpNegate:
opstr = "-"
}
g.Fgenf(w, "%[2]v%.[1]*[3]v", precedence, opstr, expr.Operand)
}