/// <inheritdoc/>
public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens)
{
if (this.Elements.Count == 1)
{
return(this.Elements[0].GetParsedType(ruleSet, tokens));
}
return($"({string.Join(", ", this.Elements.Select(e => e.GetParsedType(ruleSet, tokens)))})");
}
/// <inheritdoc/>
public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens)
{
if (tokens.EnumType == null)
{
return(TypeNames.IToken);
}
else
{
return($"{TypeNames.IToken}<{tokens.EnumType.ToDisplayString()}>");
}
}
/// <inheritdoc/> public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens) => this.Reference.GetParsedType(ruleSet, tokens);
/// <inheritdoc/>
public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens) =>
$"{this.Subexpr.GetParsedType(ruleSet, tokens)}?";
/// <inheritdoc/>
public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens) =>
$"{TypeNames.IReadOnlyList}<{this.Subexpr.GetParsedType(ruleSet, tokens)}>";
/// <summary> /// Calculates what the result type would be, if parsing the thing this AST describes. /// </summary> /// <param name="ruleSet">The set of available rule definitions.</param> /// <param name="tokens">The set of available token-types.</param> /// <returns>The string that describes the parsed type.</returns> public abstract string GetParsedType(RuleSet ruleSet, TokenKindSet tokens);
/// <summary> /// Parses a BNF grammar text into a <see cref="BnfAst"/>. /// </summary> /// <param name="source">The source text to parse.</param> /// <param name="tokenKinds">The <see cref="TokenKindSet"/> to use when determining what certain identifiers /// should mean (is it a token-type match, or a rule invocation).</param> /// <returns>The pair of the rule name and its <see cref="BnfAst"/>.</returns> public static (string Name, BnfAst?Ast) Parse(string source, TokenKindSet tokenKinds) =>
/// <inheritdoc/> public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens) => this.Elements[0].GetParsedType(ruleSet, tokens);
/// <inheritdoc/>
public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens)
{
var called = ruleSet.GetRule(this.Name);
return(called.Ast.GetParsedType(ruleSet, tokens));
}
/// <inheritdoc/> public override string GetParsedType(RuleSet ruleSet, TokenKindSet tokens) => this.Method.ReturnType.ToDisplayString();