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Update coalesce precedence (#11017)

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* refactor: reimplement nullish coalescing precedence tracking

Co-authored-by: Toru Nagashima <public@mysticatea.dev>

* fix: Coalesce has same precedence with LogicalOR

* fix flow errors

Co-authored-by: Toru Nagashima <public@mysticatea.dev>
This commit is contained in:
Huáng Jùnliàng
2020-01-17 14:57:07 -05:00
committed by Nicolò Ribaudo
parent 6648d62f40
commit 45301c5304
7 changed files with 43 additions and 60 deletions
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30
packages/babel-parser/src/tokenizer/types.js
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@@ -139,22 +139,22 @@ export const types: { [name: string]: TokenType } = {
tilde: new TokenType("~", { beforeExpr, prefix, startsExpr }),
pipeline: createBinop("|>", 0),
nullishCoalescing: createBinop("??", 1),
logicalOR: createBinop("||", 2),
logicalAND: createBinop("&&", 3),
bitwiseOR: createBinop("|", 4),
bitwiseXOR: createBinop("^", 5),
bitwiseAND: createBinop("&", 6),
equality: createBinop("==/!=/===/!==", 7),
relational: createBinop("</>/<=/>=", 8),
bitShift: createBinop("<</>>/>>>", 9),
plusMin: new TokenType("+/-", { beforeExpr, binop: 10, prefix, startsExpr }),
logicalOR: createBinop("||", 1),
logicalAND: createBinop("&&", 2),
bitwiseOR: createBinop("|", 3),
bitwiseXOR: createBinop("^", 4),
bitwiseAND: createBinop("&", 5),
equality: createBinop("==/!=/===/!==", 6),
relational: createBinop("</>/<=/>=", 7),
bitShift: createBinop("<</>>/>>>", 8),
plusMin: new TokenType("+/-", { beforeExpr, binop: 9, prefix, startsExpr }),
// startsExpr: required by v8intrinsic plugin
modulo: new TokenType("%", { beforeExpr, binop: 11, startsExpr }),
star: createBinop("*", 11),
slash: createBinop("/", 11),
modulo: new TokenType("%", { beforeExpr, binop: 10, startsExpr }),
star: createBinop("*", 10),
slash: createBinop("/", 10),
exponent: new TokenType("**", {
beforeExpr,
binop: 12,
binop: 11,
rightAssociative: true,
}),
@@ -189,8 +189,8 @@ export const types: { [name: string]: TokenType } = {
_null: createKeyword("null", { startsExpr }),
_true: createKeyword("true", { startsExpr }),
_false: createKeyword("false", { startsExpr }),
_in: createKeyword("in", { beforeExpr, binop: 8 }),
_instanceof: createKeyword("instanceof", { beforeExpr, binop: 8 }),
_in: createKeyword("in", { beforeExpr, binop: 7 }),
_instanceof: createKeyword("instanceof", { beforeExpr, binop: 7 }),
_typeof: createKeyword("typeof", { beforeExpr, prefix, startsExpr }),
_void: createKeyword("void", { beforeExpr, prefix, startsExpr }),
_delete: createKeyword("delete", { beforeExpr, prefix, startsExpr }),