577 lines
17 KiB
Go
577 lines
17 KiB
Go
// Copyright 2016-2020, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package dotnet
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import (
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"bytes"
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"fmt"
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"io"
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"math/big"
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"strings"
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/hcl/v2/hclsyntax"
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"github.com/pulumi/pulumi/pkg/v3/codegen/hcl2"
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"github.com/pulumi/pulumi/pkg/v3/codegen/hcl2/model"
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"github.com/pulumi/pulumi/pkg/v3/codegen/schema"
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"github.com/pulumi/pulumi/sdk/v3/go/common/util/contract"
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"github.com/zclconf/go-cty/cty"
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)
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type nameInfo int
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func (nameInfo) Format(name string) string {
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return makeValidIdentifier(name)
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}
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// lowerExpression amends the expression with intrinsics for C# generation.
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func (g *generator) lowerExpression(expr model.Expression, typ model.Type) model.Expression {
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expr = hcl2.RewritePropertyReferences(expr)
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expr, diags := hcl2.RewriteApplies(expr, nameInfo(0), !g.asyncInit)
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contract.Assert(len(diags) == 0)
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expr = hcl2.RewriteConversions(expr, typ)
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if g.asyncInit {
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expr = g.awaitInvokes(expr)
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} else {
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expr = g.outputInvokes(expr)
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}
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return expr
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}
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// outputInvokes wraps each call to `invoke` with a call to the `output` intrinsic. This rewrite should only be used if
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// resources are instantiated within a stack constructor, where `await` operator is not available. We want to avoid the
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// nastiness of working with raw `Task` and wrap it into Pulumi's Output immediately to be able to `Apply` on it.
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// Note that this depends on the fact that invokes are the only way to introduce promises
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// in to a Pulumi program; if this changes in the future, this transform will need to be applied in a more general way
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// (e.g. by the apply rewriter).
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func (g *generator) outputInvokes(x model.Expression) model.Expression {
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rewriter := func(x model.Expression) (model.Expression, hcl.Diagnostics) {
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// Ignore the node if it is not a call to invoke.
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call, ok := x.(*model.FunctionCallExpression)
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if !ok || call.Name != hcl2.Invoke {
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return x, nil
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}
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_, isOutput := call.Type().(*model.OutputType)
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if isOutput {
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return x, nil
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}
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_, isPromise := call.Type().(*model.PromiseType)
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contract.Assert(isPromise)
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return newOutputCall(call), nil
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}
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x, diags := model.VisitExpression(x, model.IdentityVisitor, rewriter)
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contract.Assert(len(diags) == 0)
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return x
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}
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// awaitInvokes wraps each call to `invoke` with a call to the `await` intrinsic. This rewrite should only be used
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// if we are generating an async Initialize, in which case the apply rewriter should also be configured not to treat
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// promises as eventuals. Note that this depends on the fact that invokes are the only way to introduce promises
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// in to a Pulumi program; if this changes in the future, this transform will need to be applied in a more general way
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// (e.g. by the apply rewriter).
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func (g *generator) awaitInvokes(x model.Expression) model.Expression {
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contract.Assert(g.asyncInit)
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rewriter := func(x model.Expression) (model.Expression, hcl.Diagnostics) {
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// Ignore the node if it is not a call to invoke.
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call, ok := x.(*model.FunctionCallExpression)
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if !ok || call.Name != hcl2.Invoke {
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return x, nil
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}
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_, isPromise := call.Type().(*model.PromiseType)
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contract.Assert(isPromise)
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return newAwaitCall(call), nil
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}
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x, diags := model.VisitExpression(x, model.IdentityVisitor, rewriter)
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contract.Assert(len(diags) == 0)
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return x
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}
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func (g *generator) GetPrecedence(expr model.Expression) int {
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// TODO(msh): Current values copied from Node, update based on
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/operators/
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switch expr := expr.(type) {
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case *model.ConditionalExpression:
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return 4
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case *model.BinaryOpExpression:
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switch expr.Operation {
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case hclsyntax.OpLogicalOr:
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return 5
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case hclsyntax.OpLogicalAnd:
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return 6
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case hclsyntax.OpEqual, hclsyntax.OpNotEqual:
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return 11
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case hclsyntax.OpGreaterThan, hclsyntax.OpGreaterThanOrEqual, hclsyntax.OpLessThan,
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hclsyntax.OpLessThanOrEqual:
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return 12
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case hclsyntax.OpAdd, hclsyntax.OpSubtract:
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return 14
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case hclsyntax.OpMultiply, hclsyntax.OpDivide, hclsyntax.OpModulo:
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return 15
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default:
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contract.Failf("unexpected binary expression %v", expr)
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}
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case *model.UnaryOpExpression:
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return 17
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case *model.FunctionCallExpression:
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switch expr.Name {
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case intrinsicAwait:
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return 17
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default:
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return 20
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}
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case *model.ForExpression, *model.IndexExpression, *model.RelativeTraversalExpression, *model.SplatExpression,
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*model.TemplateJoinExpression:
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return 20
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case *model.AnonymousFunctionExpression, *model.LiteralValueExpression, *model.ObjectConsExpression,
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*model.ScopeTraversalExpression, *model.TemplateExpression, *model.TupleConsExpression:
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return 22
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default:
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contract.Failf("unexpected expression %v of type %T", expr, expr)
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}
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return 0
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}
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func (g *generator) GenAnonymousFunctionExpression(w io.Writer, expr *model.AnonymousFunctionExpression) {
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switch len(expr.Signature.Parameters) {
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case 0:
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g.Fgen(w, "()")
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case 1:
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g.Fgenf(w, "%s", expr.Signature.Parameters[0].Name)
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g.Fgenf(w, " => %v", expr.Body)
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default:
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g.Fgen(w, "values =>\n")
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g.Fgenf(w, "%s{\n", g.Indent)
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g.Indented(func() {
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for i, p := range expr.Signature.Parameters {
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g.Fgenf(w, "%svar %s = values.Item%d;\n", g.Indent, p.Name, i+1)
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}
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g.Fgenf(w, "%sreturn %v;\n", g.Indent, expr.Body)
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})
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g.Fgenf(w, "%s}", g.Indent)
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}
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}
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func (g *generator) GenBinaryOpExpression(w io.Writer, expr *model.BinaryOpExpression) {
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opstr, precedence := "", g.GetPrecedence(expr)
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switch expr.Operation {
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case hclsyntax.OpAdd:
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opstr = "+"
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case hclsyntax.OpDivide:
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opstr = "/"
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case hclsyntax.OpEqual:
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opstr = "=="
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case hclsyntax.OpGreaterThan:
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opstr = ">"
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case hclsyntax.OpGreaterThanOrEqual:
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opstr = ">="
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case hclsyntax.OpLessThan:
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opstr = "<"
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case hclsyntax.OpLessThanOrEqual:
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opstr = "<="
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case hclsyntax.OpLogicalAnd:
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opstr = "&&"
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case hclsyntax.OpLogicalOr:
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opstr = "||"
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case hclsyntax.OpModulo:
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opstr = "%"
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case hclsyntax.OpMultiply:
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opstr = "*"
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case hclsyntax.OpNotEqual:
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opstr = "!="
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case hclsyntax.OpSubtract:
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opstr = "-"
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default:
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opstr, precedence = ",", 1
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}
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g.Fgenf(w, "%.[1]*[2]v %[3]v %.[1]*[4]o", precedence, expr.LeftOperand, opstr, expr.RightOperand)
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}
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func (g *generator) GenConditionalExpression(w io.Writer, expr *model.ConditionalExpression) {
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g.Fgenf(w, "%.4v ? %.4v : %.4v", expr.Condition, expr.TrueResult, expr.FalseResult)
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}
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func (g *generator) GenForExpression(w io.Writer, expr *model.ForExpression) {
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g.genNYI(w, "ForExpression")
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}
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func (g *generator) genApply(w io.Writer, expr *model.FunctionCallExpression) {
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// Extract the list of outputs and the continuation expression from the `__apply` arguments.
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applyArgs, then := hcl2.ParseApplyCall(expr)
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if len(applyArgs) == 1 {
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// If we only have a single output, just generate a normal `.Apply`
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g.Fgenf(w, "%.v.Apply(%.v)", applyArgs[0], then)
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} else {
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// Otherwise, generate a call to `Output.Tuple().Apply()`.
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g.Fgen(w, "Output.Tuple(")
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for i, o := range applyArgs {
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if i > 0 {
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g.Fgen(w, ", ")
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}
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g.Fgenf(w, "%.v", o)
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}
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g.Fgenf(w, ").Apply(%.v)", then)
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}
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}
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func (g *generator) genRange(w io.Writer, call *model.FunctionCallExpression, entries bool) {
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g.genNYI(w, "Range %.v %.v", call, entries)
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}
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var functionNamespaces = map[string][]string{
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"readDir": {"System.IO", "System.Linq"},
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"readFile": {"System.IO"},
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"toJSON": {"System.Text.Json", "System.Collections.Generic"},
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}
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func (g *generator) genFunctionUsings(x *model.FunctionCallExpression) []string {
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if x.Name != hcl2.Invoke {
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return functionNamespaces[x.Name]
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}
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pkg, _ := g.functionName(x.Args[0])
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return []string{fmt.Sprintf("%s = Pulumi.%[1]s", pkg)}
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}
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func (g *generator) GenFunctionCallExpression(w io.Writer, expr *model.FunctionCallExpression) {
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switch expr.Name {
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case hcl2.IntrinsicConvert:
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switch arg := expr.Args[0].(type) {
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case *model.ObjectConsExpression:
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g.genObjectConsExpression(w, arg, expr.Type())
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default:
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g.Fgenf(w, "%.v", expr.Args[0]) // <- probably wrong w.r.t. precedence
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}
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case hcl2.IntrinsicApply:
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g.genApply(w, expr)
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case intrinsicAwait:
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g.Fgenf(w, "await %.17v", expr.Args[0])
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case intrinsicOutput:
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g.Fgenf(w, "Output.Create(%.v)", expr.Args[0])
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case "element":
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g.Fgenf(w, "%.20v[%.v]", expr.Args[0], expr.Args[1])
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case "entries":
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switch model.ResolveOutputs(expr.Args[0].Type()).(type) {
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case *model.ListType, *model.TupleType:
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if call, ok := expr.Args[0].(*model.FunctionCallExpression); ok && call.Name == "range" {
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g.genRange(w, call, true)
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return
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}
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g.Fgenf(w, "%.20v.Select((v, k)", expr.Args[0])
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case *model.MapType, *model.ObjectType:
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g.genNYI(w, "MapOrObjectEntries")
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}
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g.Fgenf(w, " => new { Key = k, Value = v })")
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case "fileArchive":
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g.Fgenf(w, "new FileArchive(%.v)", expr.Args[0])
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case "fileAsset":
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g.Fgenf(w, "new FileAsset(%.v)", expr.Args[0])
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case hcl2.Invoke:
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_, name := g.functionName(expr.Args[0])
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optionsBag := ""
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if len(expr.Args) == 3 {
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var buf bytes.Buffer
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g.Fgenf(&buf, ", %.v", expr.Args[2])
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optionsBag = buf.String()
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}
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g.Fgenf(w, "%s.InvokeAsync(%.v%v)", name, expr.Args[1], optionsBag)
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case "length":
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g.Fgenf(w, "%.20v.Length", expr.Args[0])
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case "lookup":
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g.Fgenf(w, "%v[%v]", expr.Args[0], expr.Args[1])
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if len(expr.Args) == 3 {
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g.Fgenf(w, " ?? %v", expr.Args[2])
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}
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case "range":
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g.genRange(w, expr, false)
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case "readFile":
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g.Fgenf(w, "File.ReadAllText(%v)", expr.Args[0])
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case "readDir":
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g.Fgenf(w, "Directory.GetFiles(%.v).Select(Path.GetFileName)", expr.Args[0])
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case "secret":
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g.Fgenf(w, "Output.CreateSecret(%v)", expr.Args[0])
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case "split":
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g.Fgenf(w, "%.20v.Split(%v)", expr.Args[1], expr.Args[0])
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case "toJSON":
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g.Fgen(w, "JsonSerializer.Serialize(")
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g.genDictionary(w, expr.Args[0])
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g.Fgen(w, ")")
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default:
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g.genNYI(w, "call %v", expr.Name)
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}
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}
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func (g *generator) genDictionary(w io.Writer, expr model.Expression) {
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switch expr := expr.(type) {
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case *model.ObjectConsExpression:
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g.Fgen(w, "new Dictionary<string, object?>\n")
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g.Fgenf(w, "%s{\n", g.Indent)
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g.Indented(func() {
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for _, item := range expr.Items {
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g.Fgenf(w, "%s{ %.v, ", g.Indent, item.Key)
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g.genDictionary(w, item.Value)
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g.Fgen(w, " },\n")
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}
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})
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g.Fgenf(w, "%s}", g.Indent)
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case *model.TupleConsExpression:
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g.Fgen(w, "new[]\n")
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g.Indented(func() {
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g.Fgenf(w, "%[1]s{\n", g.Indent)
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g.Indented(func() {
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for _, v := range expr.Expressions {
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g.Fgenf(w, "%s", g.Indent)
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g.genDictionary(w, v)
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g.Fgen(w, ",\n")
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}
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})
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g.Fgenf(w, "%s}", g.Indent)
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})
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g.Fgenf(w, "\n%s", g.Indent)
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default:
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g.Fgenf(w, "%.v", expr)
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}
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}
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func (g *generator) GenIndexExpression(w io.Writer, expr *model.IndexExpression) {
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g.Fgenf(w, "%.20v[%.v]", expr.Collection, expr.Key)
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}
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func (g *generator) escapeString(v string, verbatim, expressions bool) string {
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builder := strings.Builder{}
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for _, c := range v {
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if verbatim {
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if c == '"' {
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builder.WriteRune('"')
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}
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} else {
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if c == '"' || c == '\\' {
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builder.WriteRune('\\')
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}
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}
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if expressions && (c == '{' || c == '}') {
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builder.WriteRune(c)
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}
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builder.WriteRune(c)
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}
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return builder.String()
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}
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func (g *generator) genStringLiteral(w io.Writer, v string) {
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newlines := strings.Contains(v, "\n")
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if !newlines {
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// This string does not contain newlines so we'll generate a regular string literal. Quotes and backslashes
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// will be escaped in conformance with
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure
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g.Fgen(w, "\"")
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g.Fgen(w, g.escapeString(v, false, false))
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g.Fgen(w, "\"")
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} else {
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// This string does contain newlines, so we'll generate a verbatim string literal. Quotes will be escaped
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// in conformance with
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// https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/lexical-structure
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g.Fgen(w, "@\"")
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g.Fgen(w, g.escapeString(v, true, false))
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g.Fgen(w, "\"")
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}
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}
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func (g *generator) GenLiteralValueExpression(w io.Writer, expr *model.LiteralValueExpression) {
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switch expr.Type() {
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case model.BoolType:
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g.Fgenf(w, "%v", expr.Value.True())
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case model.NoneType:
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g.Fgen(w, "null")
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case model.NumberType:
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bf := expr.Value.AsBigFloat()
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if i, acc := bf.Int64(); acc == big.Exact {
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g.Fgenf(w, "%d", i)
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} else {
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f, _ := bf.Float64()
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g.Fgenf(w, "%g", f)
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}
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case model.StringType:
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g.genStringLiteral(w, expr.Value.AsString())
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default:
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contract.Failf("unexpected literal type in GenLiteralValueExpression: %v (%v)", expr.Type(),
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expr.SyntaxNode().Range())
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}
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}
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func (g *generator) GenObjectConsExpression(w io.Writer, expr *model.ObjectConsExpression) {
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g.genObjectConsExpression(w, expr, expr.Type())
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}
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func (g *generator) genObjectConsExpression(w io.Writer, expr *model.ObjectConsExpression, destType model.Type) {
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if len(expr.Items) == 0 {
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return
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}
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typeName := g.argumentTypeName(expr, destType)
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if typeName != "" {
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g.Fgenf(w, "new %s", typeName)
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g.Fgenf(w, "\n%s{\n", g.Indent)
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g.Indented(func() {
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for _, item := range expr.Items {
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g.Fgenf(w, "%s", g.Indent)
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lit := item.Key.(*model.LiteralValueExpression)
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g.Fprint(w, propertyName(lit.Value.AsString()))
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g.Fgenf(w, " = %.v,\n", item.Value)
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}
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})
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g.Fgenf(w, "%s}", g.Indent)
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} else {
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g.Fgenf(w, "\n%s{\n", g.Indent)
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g.Indented(func() {
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for _, item := range expr.Items {
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g.Fgenf(w, "%s{ %.v, %.v },\n", g.Indent, item.Key, item.Value)
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}
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})
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g.Fgenf(w, "%s}", g.Indent)
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}
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}
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func (g *generator) genRelativeTraversal(w io.Writer,
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traversal hcl.Traversal, parts []model.Traversable, objType *schema.ObjectType) {
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for i, part := range traversal {
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var key cty.Value
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switch part := part.(type) {
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case hcl.TraverseAttr:
|
|
key = cty.StringVal(part.Name)
|
|
if objType != nil {
|
|
if p, ok := objType.Property(part.Name); ok {
|
|
if info, ok := p.Language["csharp"].(CSharpPropertyInfo); ok && info.Name != "" {
|
|
key = cty.StringVal(info.Name)
|
|
}
|
|
}
|
|
}
|
|
case hcl.TraverseIndex:
|
|
key = part.Key
|
|
default:
|
|
contract.Failf("unexpected traversal part of type %T (%v)", part, part.SourceRange())
|
|
}
|
|
|
|
if model.IsOptionalType(model.GetTraversableType(parts[i])) {
|
|
g.Fgen(w, "?")
|
|
}
|
|
|
|
switch key.Type() {
|
|
case cty.String:
|
|
g.Fgenf(w, ".%s", propertyName(key.AsString()))
|
|
case cty.Number:
|
|
idx, _ := key.AsBigFloat().Int64()
|
|
g.Fgenf(w, "[%d]", idx)
|
|
default:
|
|
contract.Failf("unexpected traversal key of type %T (%v)", key, 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, nil)
|
|
}
|
|
|
|
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)
|
|
|
|
var objType *schema.ObjectType
|
|
if resource, ok := expr.Parts[0].(*hcl2.Resource); ok {
|
|
if schemaType, ok := hcl2.GetSchemaForType(resource.InputType); ok {
|
|
objType, _ = schemaType.(*schema.ObjectType)
|
|
}
|
|
}
|
|
g.genRelativeTraversal(w, expr.Traversal.SimpleSplit().Rel, expr.Parts, objType)
|
|
}
|
|
|
|
func (g *generator) GenSplatExpression(w io.Writer, expr *model.SplatExpression) {
|
|
g.Fgenf(w, "%.20v.Select(__item => %.v).ToList()", expr.Source, expr.Each)
|
|
}
|
|
|
|
func (g *generator) GenTemplateExpression(w io.Writer, expr *model.TemplateExpression) {
|
|
multiLine := false
|
|
expressions := false
|
|
for _, expr := range expr.Parts {
|
|
if lit, ok := expr.(*model.LiteralValueExpression); ok && lit.Type() == model.StringType {
|
|
if strings.Contains(lit.Value.AsString(), "\n") {
|
|
multiLine = true
|
|
}
|
|
} else {
|
|
expressions = true
|
|
}
|
|
}
|
|
|
|
if multiLine {
|
|
g.Fgen(w, "@")
|
|
}
|
|
if expressions {
|
|
g.Fgen(w, "$")
|
|
}
|
|
g.Fgen(w, "\"")
|
|
for _, expr := range expr.Parts {
|
|
if lit, ok := expr.(*model.LiteralValueExpression); ok && lit.Type() == model.StringType {
|
|
g.Fgen(w, g.escapeString(lit.Value.AsString(), multiLine, expressions))
|
|
} 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, "{}")
|
|
default:
|
|
g.Fgenf(w, "\n%s{", g.Indent)
|
|
g.Indented(func() {
|
|
for _, v := range expr.Expressions {
|
|
g.Fgenf(w, "\n%s%.v,", g.Indent, v)
|
|
}
|
|
})
|
|
g.Fgenf(w, "\n%s}", 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)
|
|
}
|