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Add hint for Cpp1 prefix operators #419

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Merged
merged 1 commit into from
May 20, 2023
Merged

Add hint for Cpp1 prefix operators #419

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5 changes: 5 additions & 0 deletions regression-tests/pure2-cpp1-prefix-expression.cpp2
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
main: () =
{
v := 1;
p := &v;
}
3 changes: 3 additions & 0 deletions regression-tests/test-results/pure2-cpp1-prefix-expression.cpp2.output
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@@ -0,0 +1,3 @@
pure2-cpp1-prefix-expression.cpp2...
pure2-cpp1-prefix-expression.cpp2(4,10): error: use postfix 'var&' for address, not '&var'

14 changes: 14 additions & 0 deletions source/parse.h
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Expand Up @@ -3793,6 +3793,20 @@ class parser
if ((n->expr = postfix_expression())) {
return n;
}
switch (curr().type())
{
break; case lexeme::PlusPlus:
error("only postfix 'var++' increment is supported, not '++var'", false);
break; case lexeme::MinusMinus:
error("only postfix 'var--' decrement is supported, not '--var'", false);
break; case lexeme::Multiply:
error("use postfix 'ptr*' to dereference, not '*ptr'", false);
break; case lexeme::Ampersand:
error("use postfix 'var&' for address, not '&var'", false);
break; case lexeme::Tilde:
error("use postfix 'var~' for bitwise complement, not '~var'", false);
break; default: ;
}
return {};
}

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