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Merge pull request #3627 from ethereum/additional-keywords

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[BREAKING] Add new reserved keywords.
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Alex Beregszaszi 2018-06-12 16:33:26 +01:00 committed by GitHub
commit d1e7e9ef5e
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4 changed files with 48 additions and 5 deletions
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3
Changelog.md
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@ -7,6 +7,9 @@ Breaking Changes:
* Disallow conversions between bytesX and uintY of different size.
* Commandline interface: Require ``-`` if standard input is used as source.
* General: New keywords: ``calldata``
* General: Add new reserved keywords: ``alias``, ``apply``, ``auto``, ``copyof``, ``define``, ``immutable``,
``implements``, ``macro``, ``mutable``, ``override``, ``partial``, ``promise``, ``reference``, ``sealed``,
``sizeof``, ``supports``, ``typedef`` and ``unchecked``.
* General: ``continue`` in a ``do...while`` loop jumps to the condition (it used to jump to the loop body). Warning: this may silently change the semantics of existing code.
* General: Signed right shift uses proper arithmetic shift, i.e. rounding towards negative infinity. Warning: this may silently change the semantics of existing code!
* Introduce ``emit`` as a keyword instead of parsing it as identifier.

7
docs/miscellaneous.rst
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@ -409,8 +409,11 @@ Reserved Keywords
These keywords are reserved in Solidity. They might become part of the syntax in the future:
``abstract``, ``after``, ``case``, ``catch``, ``default``, ``final``, ``in``, ``inline``, ``let``, ``match``, ``null``,
``of``, ``relocatable``, ``static``, ``switch``, ``try``, ``type``, ``typeof``.
``abstract``, ``after``, ``alias``, ``apply``, ``auto``, ``case``, ``catch``, ``copyof``, ``default``,
``define``, ``final``, ``immutable``, ``implements``, ``in``, ``inline``, ``let``, ``macro``, ``match``,
``mutable``, ``null``, ``of``, ``override``, ``partial``, ``promise``, ``reference``, ``relocatable``,
``sealed``, ``sizeof``, ``static``, ``supports``, ``switch``, ``try``, ``type``, ``typedef``, ``typeof``,
``unchecked``.
Language Grammar
================

21
libsolidity/parsing/Token.h
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@ -223,22 +223,41 @@ namespace solidity
/* Keywords reserved for future use. */ \
K(Abstract, "abstract", 0) \
K(After, "after", 0) \
K(Alias, "alias", 0) \
K(Apply, "apply", 0) \
K(Auto, "auto", 0) \
K(Case, "case", 0) \
K(Catch, "catch", 0) \
K(CopyOf, "copyof", 0) \
K(Default, "default", 0) \
K(Define, "define", 0) \
K(Final, "final", 0) \
K(Immutable, "immutable", 0) \
K(Implements, "implements", 0) \
K(In, "in", 0) \
K(Inline, "inline", 0) \
K(Let, "let", 0) \
K(Macro, "macro", 0) \
K(Match, "match", 0) \
K(Mutable, "mutable", 0) \
K(NullLiteral, "null", 0) \
K(Of, "of", 0) \
K(Override, "override", 0) \
K(Partial, "partial", 0) \
K(Promise, "promise", 0) \
K(Reference, "reference", 0) \
K(Relocatable, "relocatable", 0) \
K(Sealed, "sealed", 0) \
K(Sizeof, "sizeof", 0) \
K(Static, "static", 0) \
K(Supports, "supports", 0) \
K(Switch, "switch", 0) \
K(Try, "try", 0) \
K(Type, "type", 0) \
K(Typedef, "typedef", 0) \
K(TypeOf, "typeof", 0) \
K(Unchecked, "unchecked", 0) \
\
/* Illegal token - not able to scan. */ \
T(Illegal, "ILLEGAL", 0) \
\
@ -295,7 +314,7 @@ public:
static bool isStateMutabilitySpecifier(Value op) { return op == Pure || op == Constant || op == View || op == Payable; }
static bool isEtherSubdenomination(Value op) { return op == SubWei || op == SubSzabo || op == SubFinney || op == SubEther; }
static bool isTimeSubdenomination(Value op) { return op == SubSecond || op == SubMinute || op == SubHour || op == SubDay || op == SubWeek || op == SubYear; }
static bool isReservedKeyword(Value op) { return (Abstract <= op && op <= TypeOf); }
static bool isReservedKeyword(Value op) { return (Abstract <= op && op <= Unchecked); }
// @returns a string corresponding to the JS token string
// (.e., "<" for the token LT) or NULL if the token doesn't

22
test/libsolidity/SolidityParser.cpp
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@ -491,28 +491,46 @@ BOOST_AUTO_TEST_CASE(keyword_is_reserved)
auto keywords = {
"abstract",
"after",
"alias",
"apply",
"auto",
"case",
"catch",
"copyof",
"default",
"define",
"final",
"immutable",
"implements",
"in",
"inline",
"let",
"macro",
"match",
"mutable",
"null",
"of",
"override",
"partial",
"promise",
"reference",
"relocatable",
"sealed",
"sizeof",
"static",
"supports",
"switch",
"try",
"type",
"typeof"
"typedef",
"typeof",
"unchecked"
};
for (const auto& keyword: keywords)
{
auto text = std::string("contract ") + keyword + " {}";
CHECK_PARSE_ERROR(text.c_str(), "Expected identifier but got reserved keyword");
CHECK_PARSE_ERROR(text.c_str(), string("Expected identifier but got reserved keyword '") + keyword + "'");
}
}