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expression function calls

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nub31
2026-02-09 22:30:25 +01:00
parent 88fe03c048
commit d3e2dcede8
5 changed files with 63 additions and 21 deletions
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45
compiler/Parser.cs
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@@ -135,23 +135,13 @@ public sealed class Parser(string fileName, List<Token> tokens)
var target = ParseExpression();
if (TryExpectSymbol(Symbol.OpenParen))
{
var parameters = new List<NodeExpression>();
while (!TryExpectSymbol(Symbol.CloseParen))
parameters.Add(ParseExpression());
return new NodeStatementFuncCall(TokensFrom(startIndex), target, parameters);
}
if (TryExpectSymbol(Symbol.Equal))
{
var value = ParseExpression();
return new NodeStatementAssignment(TokensFrom(startIndex), target, value);
}
throw new CompileException(Diagnostic.Error("Cannot use expression in statement context unless called as a function or used in assignment").At(fileName, target).Build());
return new NodeStatementExpression(TokensFrom(startIndex), target);
}
private NodeExpression ParseExpression(int minPrecedence = -1)
@@ -273,10 +263,26 @@ public sealed class Parser(string fileName, List<Token> tokens)
throw new CompileException(Diagnostic.Error("Expected start of expression").At(fileName, Peek()).Build());
}
if (TryExpectSymbol(Symbol.Period))
while (true)
{
var name = ExpectIdent();
expr = new NodeExpressionMemberAccess(TokensFrom(startIndex), expr, name);
if (TryExpectSymbol(Symbol.Period))
{
var name = ExpectIdent();
expr = new NodeExpressionMemberAccess(TokensFrom(startIndex), expr, name);
}
else if (TryExpectSymbol(Symbol.OpenParen))
{
var parameters = new List<NodeExpression>();
while (!TryExpectSymbol(Symbol.CloseParen))
parameters.Add(ParseExpression());
expr = new NodeExpressionFuncCall(TokensFrom(startIndex), expr, parameters);
}
else
{
break;
}
}
return expr;
@@ -574,10 +580,9 @@ public sealed class NodeStatementBlock(List<Token> tokens, List<NodeStatement> s
public List<NodeStatement> Statements { get; } = statements;
}
public sealed class NodeStatementFuncCall(List<Token> tokens, NodeExpression target, List<NodeExpression> parameters) : NodeStatement(tokens)
public sealed class NodeStatementExpression(List<Token> tokens, NodeExpression expression) : NodeStatement(tokens)
{
public NodeExpression Target { get; } = target;
public List<NodeExpression> Parameters { get; } = parameters;
public NodeExpression Expression { get; } = expression;
}
public sealed class NodeStatementReturn(List<Token> tokens, NodeExpression value) : NodeStatement(tokens)
@@ -647,6 +652,12 @@ public sealed class NodeExpressionMemberAccess(List<Token> tokens, NodeExpressio
public TokenIdent Name { get; } = name;
}
public sealed class NodeExpressionFuncCall(List<Token> tokens, NodeExpression target, List<NodeExpression> parameters) : NodeExpression(tokens)
{
public NodeExpression Target { get; } = target;
public List<NodeExpression> Parameters { get; } = parameters;
}
public sealed class NodeExpressionLocalIdent(List<Token> tokens, TokenIdent value) : NodeExpression(tokens)
{
public TokenIdent Value { get; } = value;