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Diffstat (limited to 'test/language/expressions/coalesce/tco-pos-undefined.js')
-rw-r--r-- | test/language/expressions/coalesce/tco-pos-undefined.js | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/language/expressions/coalesce/tco-pos-undefined.js b/test/language/expressions/coalesce/tco-pos-undefined.js new file mode 100644 index 000000000..0065123eb --- /dev/null +++ b/test/language/expressions/coalesce/tco-pos-undefined.js @@ -0,0 +1,26 @@ +// Copyright (C) 2019 Leo Balter. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +description: Expression is a candidate for tail-call optimization. +esid: sec-static-semantics-hascallintailposition +info: | + Expression Rules + + CoalesceExpression : CoalesceExpressionHead ?? BitwiseORExpression + + 1. Return HasCallInTailPosition of BitwiseORExpression with argument call. +flags: [onlyStrict] +features: [tail-call-optimization, coalesce-expression] +includes: [tcoHelper.js] +---*/ + +var callCount = 0; +(function f(n) { + if (n === 0) { + callCount += 1 + return; + } + return undefined ?? f(n - 1); +}($MAX_ITERATIONS)); +assert.sameValue(callCount, 1); |