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AST: Add printing support for #available and #_hasSymbol conditions #84134

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Merged
merged 1 commit into from
Sep 6, 2025
Merged

AST: Add printing support for #available and #_hasSymbol conditions #84134

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53 changes: 47 additions & 6 deletions lib/AST/ASTPrinter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1141,6 +1141,8 @@ class PrintAST : public ASTVisitor<PrintAST> {

void printArgumentList(ArgumentList *args, bool forSubscript = false);

void printAvailabilitySpec(AvailabilitySpec *spec);

void printStmtCondition(StmtCondition stmt);

#define DECL(Name,Parent) void visit##Name##Decl(Name##Decl *decl);
Expand Down Expand Up @@ -5697,19 +5699,58 @@ void PrintAST::visitRepeatWhileStmt(RepeatWhileStmt *stmt) {
visit(stmt->getCond());
}

void PrintAST::printAvailabilitySpec(AvailabilitySpec *spec) {
auto domainOrIdentifier = spec->getDomainOrIdentifier();
if (auto domain = domainOrIdentifier.getAsDomain()) {
Printer << domain->getNameForAttributePrinting();
} else {
Printer << domainOrIdentifier.getAsIdentifier().value();
}

if (!spec->getRawVersion().empty())
Printer << " " << spec->getRawVersion().getAsString();
}

void PrintAST::printStmtCondition(StmtCondition condition) {
interleave(
condition,
[&](StmtConditionElement &elt) {
if (auto pattern = elt.getPatternOrNull()) {
printPattern(pattern);
auto initializer = elt.getInitializer();
if (initializer) {
switch (elt.getKind()) {
case StmtConditionElement::ConditionKind::CK_Boolean:
visit(elt.getBoolean());
break;

case StmtConditionElement::ConditionKind::CK_PatternBinding:
printPattern(elt.getPattern());
if (auto initializer = elt.getInitializer()) {
Printer << " = ";
visit(initializer);
}
} else if (auto boolean = elt.getBooleanOrNull()) {
visit(boolean);
break;

case StmtConditionElement::ConditionKind::CK_Availability:
if (auto availability = elt.getAvailability()) {
Printer << (availability->isUnavailability()
? tok::pound_unavailable
: tok::pound_available)
<< "(";

interleave(
availability->getQueries(),
[&](AvailabilitySpec *spec) { printAvailabilitySpec(spec); },
[&] { Printer << ", "; });

Printer << ")";
}
break;

case StmtConditionElement::ConditionKind::CK_HasSymbol:
if (auto hasSymbolInfo = elt.getHasSymbolInfo()) {
Printer << tok::pound__hasSymbol << "(";
visit(hasSymbolInfo->getSymbolExpr());
Printer << ")";
}
break;
}
},
[&] { Printer << ", "; });
Expand Down
12 changes: 12 additions & 0 deletions test/expr/print/conditions.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,18 @@ if (5 + 5) == 9 {
// CHECK: } else {
// CHECK: }

if #available(macOS 11, iOS 17, *) {
} else if #unavailable(watchOS 11) {
}
// CHECK: if #available(macOS 11, iOS 17, *) {
// CHECK: } else if #unavailable(watchOS 11) {
// CHECK: }

if #_hasSymbol(Int.self) {
}
// CHECK: if #_hasSymbol(Int.self) {
// CHECK: }

guard (5 + 5) == 10 else {
}
// CHECK: guard (5 + 5) == 10 else {
Expand Down