private IReq <ValueNode> Value(ICommentsContext cctx)
{
var value = SimpleValue()
.Or(Array)
.Or(InlineTable)
.OrNode(() => SyntaxErrorNode.Unexpected("Expected TOML value", this.input.Current));
if (this.settings.IsFeautureEnabled(ExperimentalFeature.ValueWithUnit) && value.HasNode)
{
var unit = this.input.Accept(t => t.Type == TokenType.BareKey || t.Type == TokenType.Unit)
.CreateNode(t => new TerminalNode(t.Trimmed()).Opt());
if (unit.HasNode)
{
return(value.SyntaxNode().WithUnitAttached(unit));
}
}
return(value);
IOpt <ValueNode> SimpleValue()
=> this.input
.Accept(t => t.Type == TokenType.Float ||
t.Type == TokenType.Integer ||
t.Type == TokenType.HexInteger ||
t.Type == TokenType.BinaryInteger ||
t.Type == TokenType.OctalInteger ||
t.Type == TokenType.Bool ||
t.Type == TokenType.LocalDate ||
t.Type == TokenType.OffsetDateTime ||
t.Type == TokenType.LocalTime ||
t.Type == TokenType.LocalDateTime ||
t.Type == TokenType.Duration ||
t.Type == TokenType.String ||
t.Type == TokenType.LiteralString ||
t.Type == TokenType.MultilineString ||
t.Type == TokenType.MultilineLiteralString)
.CreateNode(t => ValueNode.CreateTerminalValue(t).Opt());
IOpt <ValueNode> Array()
=> this.input
.Accept(t => t.Type == TokenType.LBrac)
.CreateNode(t => ValueNode.CreateNonTerminalValue(this.Array(t)).Opt());
IOpt <ValueNode> InlineTable()
{
return(this.input
.Accept(t => t.Type == TokenType.LCurly)
.CreateNode(t => ValueNode.CreateNonTerminalValue(this.InlineTable(t, cctx.Consume())).Opt()));
}
}
private IOpt <ArraySeparatorNode> ArraySeparator()
{
if (Epsilon())
{
return(Opt <ArraySeparatorNode> .None);
}
return(this.input.Expect(t => t.Type == TokenType.Comma)
.CreateNode(
onSuccess: t => new ArraySeparatorNode(t, this.ArrayValue(out var _), this.AppComment()).Opt(),
onError: ut => SyntaxErrorNode.Unexpected("Array value is missing", ut)));
bool Epsilon()
=> this.input.Peek(t => t.Type == TokenType.RBrac);
}
private IReq <ExpressionNode> Expression()
{
using (var cctx = this.input.CreateConsumeCommentContext())
{
if (this.input.Peek(t => t.Type == TokenType.Eof))
{
return(new CommentExpressionNode(cctx.Consume()).Req());
}
return(KeyValueExpression()
.Or <ExpressionNode>(Table)
.OrNode(() => SyntaxErrorNode.Unexpected("Expected TOML table or row key", this.input.Current)));
IOpt <KeyValueExpressionNode> KeyValueExpression()
{
var key = this.input.Accept(IsKey)
.CreateNode(t => new KeyNode(t, this.KeySeparator()).Opt());
if (key.HasNode)
{
var comments = cctx.Consume();
return(this.input.Expect(t => t.Type == TokenType.Assign)
.CreateNode(
assignToken => new KeyValueExpressionNode(
key.AsReq(),
assignToken,
this.Value(NoCommentsHere.Instance),
comments,
this.AppComment()).Opt(),
t => new SyntaxErrorNode("Key value expression's '=' is missing.", t.Location)));
}
else
{
return(Opt <KeyValueExpressionNode> .None);
}
}
IOpt <TableNode> Table()
=> this.input
.Accept(t => t.Type == TokenType.LBrac)
.CreateNode(lbrac => this.Table(lbrac, cctx.Consume()).AsOpt());
}
}
private IReq <ValueNode> Value(ICommentsContext cctx)
{
return(SimpleValue()
.Or(Array)
.Or(InlineTable)
.OrNode(() => SyntaxErrorNode.Unexpected("Expected TOML value", this.input.Current)));
IOpt <ValueNode> SimpleValue()
=> this.input
.Accept(t => t.Type == TokenType.Float ||
t.Type == TokenType.Integer ||
t.Type == TokenType.HexInteger ||
t.Type == TokenType.BinaryInteger ||
t.Type == TokenType.OctalInteger ||
t.Type == TokenType.Bool ||
t.Type == TokenType.LocalDate ||
t.Type == TokenType.OffsetDateTime ||
t.Type == TokenType.LocalTime ||
t.Type == TokenType.LocalDateTime ||
t.Type == TokenType.Duration ||
t.Type == TokenType.String ||
t.Type == TokenType.LiteralString ||
t.Type == TokenType.MultilineString ||
t.Type == TokenType.MultilineLiteralString)
.CreateNode(t => ValueNode.CreateTerminalValue(t).Opt());
IOpt <ValueNode> Array()
=> this.input
.Accept(t => t.Type == TokenType.LBrac)
.CreateNode(t => ValueNode.CreateNonTerminalValue(this.Array(t)).Opt());
IOpt <ValueNode> InlineTable()
{
return(this.input
.Accept(t => t.Type == TokenType.LCurly)
.CreateNode(t => ValueNode.CreateNonTerminalValue(this.InlineTable(t, cctx.Consume())).Opt()));
}
}
public SyntaxErrorNode CreateErrorNode() => this.Current.TokenError() ?? SyntaxErrorNode.Unexpected(this.CurrentToken);
private SyntaxErrorNode GetError(Func <Token, SyntaxErrorNode> customHandler) => customHandler?.Invoke(this.errorToken) ?? SyntaxErrorNode.Unexpected(this.errorToken);