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Improve JavaScript parameter recognization #1722

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Feb 12, 2019
Merged

Improve JavaScript parameter recognization #1722

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0331e28
Fix JavaScript parameter not recognizing uppercase letter
RexSkz Feb 11, 2019
67e2ba2
Fix the regex which is too greedy
RexSkz Feb 11, 2019
99631a6
Use nagetive lookahead
RexSkz Feb 11, 2019
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10 changes: 5 additions & 5 deletions components/prism-javascript.js
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Original file line number Diff line number Diff line change
Expand Up @@ -29,26 +29,26 @@ Prism.languages.insertBefore('javascript', 'keyword', {
},
// This must be declared before keyword because we use "function" inside the look-forward
'function-variable': {
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\([^()]*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
alias: 'function'
},
'parameter': [
{
pattern: /(function(?:\s+[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)[^\s()][^()]*?(?=\s*\))/,
pattern: /(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,
lookbehind: true,
inside: Prism.languages.javascript
},
{
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/,
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,
inside: Prism.languages.javascript
},
{
pattern: /(\(\s*)[^\s()][^()]*?(?=\s*\)\s*=>)/,
pattern: /(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,
lookbehind: true,
inside: Prism.languages.javascript
},
{
pattern: /((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)[^\s()][^()]*?(?=\s*\)\s*\{)/,
pattern: /((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,
lookbehind: true,
inside: Prism.languages.javascript
}
Expand Down
2 changes: 1 addition & 1 deletion components/prism-javascript.min.js
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10 changes: 5 additions & 5 deletions prism.js
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Original file line number Diff line number Diff line change
Expand Up @@ -738,26 +738,26 @@ Prism.languages.insertBefore('javascript', 'keyword', {
},
// This must be declared before keyword because we use "function" inside the look-forward
'function-variable': {
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\([^()]*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/i,
alias: 'function'
},
'parameter': [
{
pattern: /(function(?:\s+[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)[^\s()][^()]*?(?=\s*\))/,
pattern: /(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,
lookbehind: true,
inside: Prism.languages.javascript
},
{
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/,
pattern: /[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,
inside: Prism.languages.javascript
},
{
pattern: /(\(\s*)[^\s()][^()]*?(?=\s*\)\s*=>)/,
pattern: /(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,
lookbehind: true,
inside: Prism.languages.javascript
},
{
pattern: /((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)[^\s()][^()]*?(?=\s*\)\s*\{)/,
pattern: /((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,
lookbehind: true,
inside: Prism.languages.javascript
}
Expand Down
40 changes: 40 additions & 0 deletions tests/languages/javascript/class-method_feature.test
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@ class Test {
async bar(x, y = 0 ) {}
$ ( ) {}
awaitFoo(){}
Example({ props: { a: _A, b} } = Props) {}
f(x = fun(), y = 0) {}
}

----------------------------------------------------
Expand Down Expand Up @@ -51,6 +53,44 @@ class Test {
["punctuation", "{"],
["punctuation", "}"],

["function", "Example"],
["punctuation", "("],
["parameter", [
["punctuation", "{"],
" props",
["punctuation", ":"],
["punctuation", "{"],
" a",
["punctuation", ":"],
" _A",
["punctuation", ","],
" b",
["punctuation", "}"],
["punctuation", "}"],
["operator", "="],
" Props"
]],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],

["function", "f"],
["punctuation", "("],
["parameter", [
"x ",
["operator", "="],
["function", "fun"],
["punctuation", "("],
["punctuation", ")"],
["punctuation", ","],
" y ",
["operator", "="],
["number", "0"]
]],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],

["punctuation", "}"]
]

Expand Down
85 changes: 85 additions & 0 deletions tests/languages/javascript/function-variable_feature.test
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
foo = function ( ) {}
foo = function ( x, y) {}
{foo: function () {}}
bar = async function baz (x ) {}
Expand All @@ -6,10 +7,22 @@ fooBar = x => x
fooBar = ( x, y ) => x
ಠ_ಠ = () => {}
Ƞȡ_҇ = async (ಠ, Ƞ = 2) => {}
d = function Example({ props: { a: _A, b} } = Props) {}
f = function (x = fun()) {}
l = (x = fun(), y) => {}
a = function () {}, b = () => {}

----------------------------------------------------

[
["function-variable", "foo"],
["operator", "="],
["keyword", "function"],
["punctuation", "("],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],

["function-variable", "foo"],
["operator", "="],
["keyword", "function"],
Expand Down Expand Up @@ -96,6 +109,78 @@ fooBar = ( x, y ) => x
["punctuation", ")"],
["operator", "=>"],
["punctuation", "{"],
["punctuation", "}"],

["function-variable", "d"],
["operator", "="],
["keyword", "function"],
["function", "Example"],
["punctuation", "("],
["parameter", [
["punctuation", "{"],
" props",
["punctuation", ":"],
["punctuation", "{"],
" a",
["punctuation", ":"],
" _A",
["punctuation", ","],
" b",
["punctuation", "}"],
["punctuation", "}"],
["operator", "="],
" Props"
]],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],

["function-variable", "f"],
["operator", "="],
["keyword", "function"],
["punctuation", "("],
["parameter", [
"x ",
["operator", "="],
["function", "fun"],
["punctuation", "("],
["punctuation", ")"]
]],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],

["function-variable", "l"],
["operator", "="],
["punctuation", "("],
["parameter", [
"x ",
["operator", "="],
["function", "fun"],
["punctuation", "("],
["punctuation", ")"],
["punctuation", ","],
" y"
]],
["punctuation", ")"],
["operator", "=>"],
["punctuation", "{"],
["punctuation", "}"],

["function-variable", "a"],
["operator", "="],
["keyword", "function"],
["punctuation", "("],
["punctuation", ")"],
["punctuation", "{"],
["punctuation", "}"],
["punctuation", ","],
["function-variable", "b"],
["operator", "="],
["punctuation", "("],
["punctuation", ")"],
["operator", "=>"],
["punctuation", "{"],
["punctuation", "}"]
]

Expand Down
6 changes: 5 additions & 1 deletion tests/languages/javascript/function_feature.test
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,8 @@ $()
ಠ_ಠ()
Ƞȡ_҇()
if(notAFunction)
foo({ x })
foo({ y: fun() })

----------------------------------------------------

Expand All @@ -21,7 +23,9 @@ if(notAFunction)
["function", "$"], ["punctuation", "("], ["punctuation", ")"],
["function", "ಠ_ಠ"], ["punctuation", "("], ["punctuation", ")"],
["function", "Ƞȡ_҇"], ["punctuation", "("], ["punctuation", ")"],
["keyword", "if"], ["punctuation", "("], "notAFunction", ["punctuation", ")"]
["keyword", "if"], ["punctuation", "("], "notAFunction", ["punctuation", ")"],
["function", "foo"], ["punctuation", "("], ["punctuation", "{"], " x ", ["punctuation", "}"], ["punctuation", ")"],
["function", "foo"], ["punctuation", "("], ["punctuation", "{"], " y", ["punctuation", ":"], ["function", "fun"], ["punctuation", "("], ["punctuation", ")"], ["punctuation", "}"], ["punctuation", ")"]
]

----------------------------------------------------
Expand Down