Extract quote reification from Staging phase #5763
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odersky
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| if (tree.fun.hasType && tree.fun.symbol == defn.QuotedType_apply) | ||
| keywordStr("'[") ~ toTextGlobal(tree.args, ", ") ~ keywordStr("]") | ||
| else | ||
| toTextLocal(tree.fun) ~ "[" ~ toTextGlobal(tree.args, ", ") ~ "]" |
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keywordStr in both branches? Also, why not factor out the prefix?
val leading =
if (tree.fun.hasType && tree.fun.symbol == defn.QuotedType_apply) keywordStr("'[")
else toTextLocal(tree.fun) ~ keywordStr("[")
leading ~ toTextGlobal(tree.args, ", ") ~ keywordStr("]")There was a problem hiding this comment.
The suffix also depends on the condition. Though I can refactor it a bit.
val isQuote = tree.fun.hasType && tree.fun.symbol == defn.QuotedType_apply
val (open, close) = if (isQuote) (keywordStr("'["), keywordStr("]")) else ("[", "]")
toTextLocal(tree.fun).provided(!isQuote) ~ open ~ toTextGlobal(tree.args, ", ") ~ closeThere was a problem hiding this comment.
I pushed this refactoring of the code
| case tree @ Select(qual, name) => | ||
| if (tree.hasType && tree.symbol == defn.QuotedExpr_~ || tree.symbol == defn.QuotedType_~) keywordStr("~(") ~ toTextLocal(qual) ~ keywordStr(")") | ||
| if (tree.hasType && tree.symbol == defn.QuotedExpr_~) keywordStr("~(") ~ toTextLocal(qual) ~ keywordStr(")") | ||
| else if (tree.hasType && tree.symbol == defn.QuotedType_~) typeText("~(") ~ toTextLocal(qual) ~ typeText(")") |
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Why typeText instead if keywordStr? (I don't know enough about the syntax highlighting stuff to be able to tell).
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It looks like this:
I added it because in some large examples it was easyer to see which where types splices and which where terms splices.
compiler/src/dotty/tools/dotc/transform/TreeMapWithStages.scala
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compiler/src/dotty/tools/dotc/transform/TreeMapWithStages.scala
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Split current `Staging` into `Staging` and `ReifyQuotes`
- `Staging`
- Just before `Pickler`
- Checks PCP
- Heals phase consistency by replacing `T` with `~implicitly[Type[T]]({{t}})` (actually `~t`)
- Expand macros
- Ycheck that PCP holds (without healing) until `ReifyQuotes`
- `ReifyQuotes`
- Aliases all type splices by replacing `~t` by `T$1` and inserting `type T$1 = ~t` at the start of the quoted block.
- Transform `'{ ... ~(... ) ... }` into `unpickle('{ ... Hole(...) ... }, List(args => ....))`
- `TreeMapWithStages` a new `TreeMap` that contains the logic to track quotation levels while mapping the tree.
- Moved logic from `MacroTransformWithImplicits` to `TreeMapWithImplicits` to be able to tranform a tree without the need to be in a macro transform. This will be useful to integrate the PCP checks and macro expansion in `Typer`.
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@nicolasstucki Which commits did you add after my last review? |
odersky
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Feb 14, 2019
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Split current
StagingintoStagingandReifyQuotesStagingPicklerTwith~implicitly[Type[T]]({{t}})(actually~t)ReifyQuotesReifyQuotes~tbyT$1and insertingtype T$1 = ~tat the start of the quoted block.'{ ... ~(...) ... }intounpickle('{ ... Hole(...) ... }, List(args => ....))TreeMapWithStagesa newTreeMapthat contains the logic to track quotation levels while mapping the tree.MacroTransformWithImplicitstoTreeMapWithImplicitsto be able to tranform a tree without the need to be in a macro transform. This will be useful to integrate the PCP checks and macro expansion inTyper.