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implement unary operators

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This commit is contained in:
Sebastien Bourdeauducq 2020-03-30 22:10:06 +08:00
parent 052ea8d98a
commit 2fae28eb70
1 changed files with 25 additions and 1 deletions
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26
src/main.rs
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@ -225,6 +225,30 @@ impl<'ctx> CodeGen<'ctx> {
None => Err(self.compile_error(CompileErrorKind::UnboundIdentifier))
}
},
ast::ExpressionType::Unop { op, a } => {
let a = self.compile_expression(&a)?;
match (op, a) {
(ast::UnaryOperator::Pos, values::BasicValueEnum::IntValue(a))
=> Ok(a.into()),
(ast::UnaryOperator::Pos, values::BasicValueEnum::FloatValue(a))
=> Ok(a.into()),
(ast::UnaryOperator::Neg, values::BasicValueEnum::IntValue(a))
=> Ok(self.builder.build_int_neg(a, "tmpneg").into()),
(ast::UnaryOperator::Neg, values::BasicValueEnum::FloatValue(a))
=> Ok(self.builder.build_float_neg(a, "tmpneg").into()),
(ast::UnaryOperator::Inv, values::BasicValueEnum::IntValue(a))
=> Ok(self.builder.build_not(a, "tmpnot").into()),
(ast::UnaryOperator::Not, values::BasicValueEnum::IntValue(a)) => {
// boolean "not"
if a.get_type().get_bit_width() != 1 {
Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented unary operation")))
} else {
Ok(self.builder.build_not(a, "tmpnot").into())
}
},
_ => Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented unary operation"))),
}
},
ast::ExpressionType::Binop { a, op, b } => {
let a = self.compile_expression(&a)?;
let b = self.compile_expression(&b)?;
@ -251,7 +275,7 @@ impl<'ctx> CodeGen<'ctx> {
=> Ok(self.builder.build_float_div(a, b, "tmpdiv").into()),
(FloorDiv, values::BasicValueEnum::IntValue(a), values::BasicValueEnum::IntValue(b))
=> Ok(self.builder.build_int_signed_div(a, b, "tmpdiv").into()),
_ => return Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented operation"))),
_ => Err(self.compile_error(CompileErrorKind::Unsupported("unimplemented binary operation"))),
}
},
ast::ExpressionType::Compare { vals, ops } => {