Apple-2-SW/prog8
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check for unexecuted statements in blocks is now done for all blocks, not only main

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Irmen de Jong 2020-12-27 03:35:20 +01:00
parent d7d7147d43
commit 7607d3d64a
1 changed files with 18 additions and 19 deletions
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37
compiler/src/prog8/ast/processing/AstChecker.kt
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@ -35,24 +35,6 @@ internal class AstChecker(private val program: Program,
if (startSub.parameters.isNotEmpty() || startSub.returntypes.isNotEmpty())
errors.err("program entrypoint subroutine can't have parameters and/or return values", startSub.position)
}
// the main module cannot contain 'regular' statements (they will never be executed!)
for (statement in mainBlock.statements) {
val ok = when (statement) {
is Block -> true
is Directive -> true
is Label -> true
is VarDecl -> true
is InlineAssembly -> true
is INameScope -> true
is NopStatement -> true
else -> false
}
if (!ok) {
errors.err("main block contains regular statements, this is not allowed (they'll never get executed). Use subroutines.", statement.position)
break
}
}
}
// there can be an optional single 'irq' block with a 'irq' subroutine in it,
@ -186,6 +168,23 @@ internal class AstChecker(private val program: Program,
errors.err("block memory address must be valid integer 0..\$ffff", block.position)
}
for (statement in block.statements) {
val ok = when (statement) {
is Block,
is Directive,
is Label,
is VarDecl,
is InlineAssembly,
is INameScope,
is NopStatement -> true
else -> false
}
if (!ok) {
errors.err("statement occurs in a block, where it will never be executed. Use it in a subroutine instead.", statement.position)
break
}
}
super.visit(block)
}
@ -616,7 +615,7 @@ internal class AstChecker(private val program: Program,
err("memory address must be valid integer 0..\$ffff", decl.value?.position)
}
} else {
err("value of memory mapped variable can only be a number, perhaps you meant to use an address pointer type instead?", decl.value?.position)
err("value of memory mapped variable can only be a fixed number, perhaps you meant to use an address pointer type instead?", decl.value?.position)
}
}
}