Merge pull request #410 from hashicorp/fix-ref-completions-after-dot-in-objects

(TF-19544) fix: Support reference completions with a trailing dot in object constructors

Author: ansgarm

decoder/expr_literal_value_completion_test.go

@@ -415,7 +415,7 @@ func TestCompletionAtPos_exprLiteralValue(t *testing.T) {
 						Range: hcl.Range{
 							Filename: "test.tf",
 							Start:    hcl.Pos{Line: 1, Column: 8, Byte: 7},
-							End:      hcl.Pos{Line: 1, Column: 10, Byte: 9},
+							End:      hcl.Pos{Line: 1, Column: 11, Byte: 10},
 						},
 					},
 				},

decoder/expr_reference_completion.go

@@ -63,22 +63,36 @@ func (ref Reference) CompletionAtPos(ctx context.Context, pos hcl.Pos) []lang.Ca
 		return candidates
 	}
 
-	eType, ok := ref.expr.(*hclsyntax.ScopeTraversalExpr)
-	if !ok {
+	var editRng, prefixRng hcl.Range
+	switch eType := ref.expr.(type) {
+	case *hclsyntax.ScopeTraversalExpr:
+		editRng = eType.Range()
+		if !editRng.ContainsPos(pos) {
+			// account for trailing character(s) which doesn't appear in AST
+			// such as dot, opening bracket etc.
+			editRng.End = pos
+		}
+		prefixRng = hcl.Range{
+			Filename: eType.Range().Filename,
+			Start:    eType.Range().Start,
+			End:      pos,
+		}
+	case *hclsyntax.ExprSyntaxError:
+		editRng = eType.Range()
+		if !editRng.ContainsPos(pos) {
+			// account for trailing character(s) which doesn't appear in AST
+			// such as dot, opening bracket etc.
+			editRng.End = pos
+		}
+		prefixRng = hcl.Range{
+			Filename: eType.Range().Filename,
+			Start:    eType.Range().Start,
+			End:      pos,
+		}
+	default:
 		return []lang.Candidate{}
 	}
 
-	editRng := eType.Range()
-	if !editRng.ContainsPos(pos) {
-		// account for trailing character(s) which doesn't appear in AST
-		// such as dot, opening bracket etc.
-		editRng.End = pos
-	}
-	prefixRng := hcl.Range{
-		Filename: eType.Range().Filename,
-		Start:    eType.Range().Start,
-		End:      pos,
-	}
 	prefix := string(prefixRng.SliceBytes(file.Bytes))
 
 	candidates := make([]lang.Candidate, 0)

go.mod

@@ -5,7 +5,7 @@ go 1.21.0
 require (
 	github.com/google/go-cmp v0.6.0
 	github.com/hashicorp/go-multierror v1.1.1
-	github.com/hashicorp/hcl/v2 v2.21.0
+	github.com/hashicorp/hcl/v2 v2.22.0
 	github.com/mh-cbon/go-fmt-fail v0.0.0-20160815164508-67765b3fbcb5
 	github.com/zclconf/go-cty v1.15.0
 	github.com/zclconf/go-cty-debug v0.0.0-20240509010212-0d6042c53940

go.sum

@@ -14,6 +14,8 @@ github.com/hashicorp/go-multierror v1.1.1 h1:H5DkEtf6CXdFp0N0Em5UCwQpXMWke8IA0+l
 github.com/hashicorp/go-multierror v1.1.1/go.mod h1:iw975J/qwKPdAO1clOe2L8331t/9/fmwbPZ6JB6eMoM=
 github.com/hashicorp/hcl/v2 v2.21.0 h1:lve4q/o/2rqwYOgUg3y3V2YPyD1/zkCLGjIV74Jit14=
 github.com/hashicorp/hcl/v2 v2.21.0/go.mod h1:62ZYHrXgPoX8xBnzl8QzbWq4dyDsDtfCRgIq1rbJEvA=
+github.com/hashicorp/hcl/v2 v2.22.0 h1:hkZ3nCtqeJsDhPRFz5EA9iwcG1hNWGePOTw6oyul12M=
+github.com/hashicorp/hcl/v2 v2.22.0/go.mod h1:62ZYHrXgPoX8xBnzl8QzbWq4dyDsDtfCRgIq1rbJEvA=
 github.com/mh-cbon/go-fmt-fail v0.0.0-20160815164508-67765b3fbcb5 h1:shw+DWUaHIyW64Tv30ASCbC6QO6fLy+M5SJb5pJVEI4=
 github.com/mh-cbon/go-fmt-fail v0.0.0-20160815164508-67765b3fbcb5/go.mod h1:nHPoxaBUc5CDAMIv0MNmn5PBjWbTs9BI/eh30/n0U6g=
 github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 h1:DpOJ2HYzCv8LZP15IdmG+YdwD2luVPHITV96TkirNBM=