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Implement non-null assertions (#443)

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This commit is contained in:
Daniel Wirtz
2019-01-30 09:56:13 +01:00
committed by GitHub
parent 2fe228ff00
commit d843772314
11 changed files with 413 additions and 32 deletions
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14
src/ast.ts
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@ -116,10 +116,11 @@ export function nodeIsConstantValue(kind: NodeKind): bool {
export function nodeIsCallable(kind: NodeKind): bool {
switch (kind) {
case NodeKind.IDENTIFIER:
case NodeKind.ASSERTION: // if kind=NONNULL
case NodeKind.CALL:
case NodeKind.ELEMENTACCESS:
case NodeKind.PROPERTYACCESS:
case NodeKind.PARENTHESIZED: return true;
case NodeKind.PARENTHESIZED:
case NodeKind.PROPERTYACCESS: return true;
}
return false;
}
@ -286,14 +287,14 @@ export abstract class Node {
static createAssertionExpression(
assertionKind: AssertionKind,
expression: Expression,
toType: CommonTypeNode,
toType: CommonTypeNode | null,
range: Range
): AssertionExpression {
var expr = new AssertionExpression();
expr.range = range;
expr.assertionKind = assertionKind;
expr.expression = expression; expression.parent = expr;
expr.toType = toType; toType.parent = expr;
expr.toType = toType; if (toType) toType.parent = expr;
return expr;
}
@ -1282,7 +1283,8 @@ export class ArrayLiteralExpression extends LiteralExpression {
/** Indicates the kind of an assertion. */
export enum AssertionKind {
PREFIX,
AS
AS,
NONNULL
}
/** Represents an assertion expression. */
@ -1294,7 +1296,7 @@ export class AssertionExpression extends Expression {
/** Expression being asserted. */
expression: Expression;
/** Target type. */
toType: CommonTypeNode;
toType: CommonTypeNode | null;
}
/** Represents a binary expression. */