LazySpecification.ceylon
import ceylon.ast.core {
LazySpecification,
LIdentifier,
Parameters
}
import com.redhat.ceylon.compiler.typechecker.tree {
Tree {
JBaseMemberExpression=BaseMemberExpression,
JLazySpecifierExpression=LazySpecifierExpression,
JParameterizedExpression=ParameterizedExpression,
JSpecifierStatement=SpecifierStatement
}
}
import ceylon.interop.java {
CeylonIterable
}
"Converts a RedHat AST [[SpecifierStatement|JSpecifierStatement]] to a `ceylon.ast` [[LazySpecification]].
Only lazy specification statements are converted by this function; for non-lazy specification statements,
use [[valueSpecificationToCeylon]]."
shared LazySpecification lazySpecificationToCeylon(JSpecifierStatement lazySpecification) {
"Only function or value may be specified"
assert (is JBaseMemberExpression|JParameterizedExpression baseMemberExpression = lazySpecification.baseMemberExpression);
LIdentifier name;
Parameters[] parameterLists;
switch (baseMemberExpression)
case (is JBaseMemberExpression) {
name = lIdentifierToCeylon(baseMemberExpression.identifier);
parameterLists = [];
}
case (is JParameterizedExpression) {
"Only function may be specified with parameters"
assert (is JBaseMemberExpression primary = baseMemberExpression.primary);
name = lIdentifierToCeylon(primary.identifier);
parameterLists = CeylonIterable(baseMemberExpression.parameterLists).collect(parametersToCeylon);
}
"Lazy specification must happen with lazy specifier"
assert (is JLazySpecifierExpression specifierExpression = lazySpecification.specifierExpression);
return LazySpecification(name, lazySpecifierToCeylon(specifierExpression), parameterLists);
}
"Compiles the given [[code]] for a Lazy Specification
into a [[LazySpecification]] using the Ceylon compiler
(more specifically, the rule for an `expressionOrSpecificationStatement`)."
shared LazySpecification? compileLazySpecification(String code) {
if (is JSpecifierStatement jExpressionOrSpecificationStatement = createParser(code).expressionOrSpecificationStatement(),
jExpressionOrSpecificationStatement.specifierExpression is JLazySpecifierExpression) {
return lazySpecificationToCeylon(jExpressionOrSpecificationStatement);
} else {
return null;
}
}