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Change type of sizeof to word. Improve type checker.

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This commit is contained in:
Karol Stasiak 2019-11-03 22:26:19 +01:00
parent ec52963b46
commit 590db9ade0
2 changed files with 10 additions and 5 deletions
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2
docs/lang/operators.md
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@ -292,7 +292,7 @@ but not
some enum → `word`
* `sizeof`: size of the argument in bytes; the argument can be an expression or a type,
and the result is a constant of either `byte` or `word` type, depending on situation
and the result is a constant of type `word`
* `call`: calls a function via a pointer;
the first argument is the pointer to the function;

13
src/main/scala/millfork/compiler/AbstractExpressionCompiler.scala
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@ -278,6 +278,10 @@ object AbstractExpressionCompiler {
case 2 => w
case 3 => env.get[Type]("int24")
case 4 => env.get[Type]("int32")
case 5 => env.get[Type]("int40")
case 6 => env.get[Type]("int48")
case 7 => env.get[Type]("int56")
case 8 => env.get[Type]("int64")
}
case ConstantArrayElementExpression(constant) =>
(constant.quickSimplify match {
@ -290,6 +294,10 @@ object AbstractExpressionCompiler {
case (_, 2) => b
case (_, 3) => env.get[Type]("int24")
case (_, 4) => env.get[Type]("int32")
case (_, 5) => env.get[Type]("int40")
case (_, 6) => env.get[Type]("int48")
case (_, 7) => env.get[Type]("int56")
case (_, 8) => env.get[Type]("int64")
}
case GeneratedConstantExpression(_, typ) => typ
case TextLiteralExpression(_) => env.get[Type]("pointer")
@ -445,10 +453,7 @@ object AbstractExpressionCompiler {
case FunctionCallExpression("sin", params) => if (params.size < 2) b else getExpressionTypeImpl(env, log, params(1), loosely)
case FunctionCallExpression("cos", params) => if (params.size < 2) b else getExpressionTypeImpl(env, log, params(1), loosely)
case FunctionCallExpression("tan", params) => if (params.size < 2) b else getExpressionTypeImpl(env, log, params(1), loosely)
case FunctionCallExpression("sizeof", params) => env.evalSizeof(params.head).requiredSize match {
case 1 => b
case 2 => w
}
case FunctionCallExpression("sizeof", _) => w
case FunctionCallExpression("%%", params) => params.map { e => getExpressionTypeImpl(env, log, e, loosely).size } match {
case List(1, 1) | List(2, 1) => b
case List(1, 2) | List(2, 2) => w