Pattern.ceylon
import ceylon.ast.core {
Node,
Pattern
}
import com.redhat.ceylon.compiler.typechecker.tree {
JNode=Node,
Tree {
JKeyValuePattern=KeyValuePattern,
JPattern=Pattern,
JTuplePattern=TuplePattern,
JVariablePattern=VariablePattern
}
}
"Converts a RedHat AST [[Pattern|JPattern]] to a `ceylon.ast` [[Pattern]]."
shared Pattern patternToCeylon(JPattern pattern, Anything(JNode,Node) update = noop) {
assert (is JVariablePattern|JTuplePattern|JKeyValuePattern pattern);
switch (pattern)
case (is JVariablePattern) { return variablePatternToCeylon(pattern, update); }
case (is JTuplePattern) { return tuplePatternToCeylon(pattern, update); }
case (is JKeyValuePattern) { return entryPatternToCeylon(pattern, update); }
}
"Compiles the given [[code]] for a Pattern
into a [[Pattern]] using the Ceylon compiler
(more specifically, the rule for a `pattern`)."
shared Pattern? compilePattern(String code, Anything(JNode,Node) update = noop) {
if (exists jPattern = createParser(code + ",").pattern()) {
// the parser needs that comma for some patterns
return patternToCeylon(jPattern, update);
} else {
return null;
}
}