Method parseSingleAttrBody

hclsyntax/parser.go:179–238

parseSingleAttrBody is a weird variant of ParseBody that deals with the body of a nested block containing only one attribute value all on a single line, like foo { bar = baz } . It expects to find a single attribute item immediately followed by the end token type with no intervening newlines.

(end TokenType)

// line, like foo { bar = baz } . It expects to find a single attribute item
// immediately followed by the end token type with no intervening newlines.
func (p *parser) parseSingleAttrBody(end TokenType) (*Body, hcl.Diagnostics) {
	ident := p.Read()
	if ident.Type != TokenIdent {
		p.recoverAfterBodyItem()
		return nil, hcl.Diagnostics{
			{
				Severity: hcl.DiagError,
				Summary:  "Argument or block definition required",
				Detail:   "An argument or block definition is required here.",
				Subject:  &ident.Range,
			},
		}
	}

	var attr *Attribute
	var diags hcl.Diagnostics

	next := p.Peek()

	switch next.Type {
	case TokenEqual:
		node, attrDiags := p.finishParsingBodyAttribute(ident, true)
		diags = append(diags, attrDiags...)
		attr = node.(*Attribute)
	case TokenOQuote, TokenOBrace, TokenIdent:
		p.recoverAfterBodyItem()
		return nil, hcl.Diagnostics{
			{
				Severity: hcl.DiagError,
				Summary:  "Argument definition required",
				Detail:   fmt.Sprintf("A single-line block definition can contain only a single argument. If you meant to define argument %q, use an equals sign to assign it a value. To define a nested block, place it on a line of its own within its parent block.", ident.Bytes),
				Subject:  hcl.RangeBetween(ident.Range, next.Range).Ptr(),
			},
		}
	default:
		p.recoverAfterBodyItem()
		return nil, hcl.Diagnostics{
			{
				Severity: hcl.DiagError,
				Summary:  "Argument or block definition required",
				Detail:   "An argument or block definition is required here. To set an argument, use the equals sign \"=\" to introduce the argument value.",
				Subject:  &ident.Range,
			},
		}
	}

	return &Body{
		Attributes: Attributes{
			string(ident.Bytes): attr,
		},

		SrcRange: attr.SrcRange,
		EndRange: hcl.Range{
			Filename: attr.SrcRange.Filename,
			Start:    attr.SrcRange.End,
			End:      attr.SrcRange.End,
		},
	}, diags