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Diffstat (limited to 'js/src/tests/test262/language/statements/function/scope-body-lex-distinct.js')
-rw-r--r-- | js/src/tests/test262/language/statements/function/scope-body-lex-distinct.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/statements/function/scope-body-lex-distinct.js b/js/src/tests/test262/language/statements/function/scope-body-lex-distinct.js new file mode 100644 index 0000000000..6a7fb51413 --- /dev/null +++ b/js/src/tests/test262/language/statements/function/scope-body-lex-distinct.js @@ -0,0 +1,55 @@ +// Copyright (C) 2016 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +esid: sec-functiondeclarationinstantiation +description: > + Creation of new lexical environment (distinct from the variable + environment) for the function body outside of strict mode +info: | + [...] + 29. If strict is false, then + a. Let lexEnv be NewDeclarativeEnvironment(varEnv). + b. NOTE: Non-strict functions use a separate lexical Environment Record + for top-level lexical declarations so that a direct eval can + determine whether any var scoped declarations introduced by the eval + code conflict with pre-existing top-level lexically scoped + declarations. This is not needed for strict functions because a + strict direct eval always places all declarations into a new + Environment Record. + [...] + + 18.2.1.3 Runtime Semantics: EvalDeclarationInstantiation + + [...] + 5. If strict is false, then + [...] + b. Let thisLex be lexEnv. + c. Assert: The following loop will terminate. + d. Repeat while thisLex is not the same as varEnv, + i. Let thisEnvRec be thisLex's EnvironmentRecord. + ii. If thisEnvRec is not an object Environment Record, then + 1. NOTE: The environment of with statements cannot contain any + lexical declaration so it doesn't need to be checked for + var/let hoisting conflicts. + 2. For each name in varNames, do + a. If thisEnvRec.HasBinding(name) is true, then + i. Throw a SyntaxError exception. + ii. NOTE: Annex B.3.5 defines alternate semantics for the + above step. + b. NOTE: A direct eval will not hoist var declaration over a + like-named lexical declaration. + iii. Let thisLex be thisLex's outer environment reference. +flags: [noStrict] +features: [let] +---*/ + +function f() { + let x; + eval('var x;'); +} + +assert.throws(SyntaxError, function() { + f(); +}); + +reportCompare(0, 0); |