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Improve binding patterns for arrow functions

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This commit is contained in:
Anthony Van de Gejuchte
2016-09-07 01:00:07 +02:00
committed by Richard van Velzen
parent 947b8750e8
commit 32c2cc33bb
12 changed files with 243 additions and 54 deletions
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49
lib/ast.js
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@@ -394,8 +394,6 @@ var AST_ArrowParametersOrSeq = DEFNODE("ArrowParametersOrSeq", "expressions", {
var root = this;
return this.expressions.map(function to_fun_args(ex, _, __, default_seen_above) {
if (ex instanceof AST_Object) {
if (ex.properties.length == 0)
croak("Invalid destructuring function parameter", ex.start.line, ex.start.col);
return new AST_Destructuring({
start: ex.start,
end: ex.end,
@@ -403,12 +401,16 @@ var AST_ArrowParametersOrSeq = DEFNODE("ArrowParametersOrSeq", "expressions", {
default: default_seen_above,
names: ex.properties.map(to_fun_args)
});
} else if (ex instanceof AST_ObjectKeyVal && ex.shorthand) {
return new AST_SymbolFunarg({
name: ex.key,
start: ex.start,
end: ex.end
});
} else if (ex instanceof AST_ObjectKeyVal ||
ex instanceof AST_ObjectComputedKeyVal
) {
if (ex.key instanceof AST_SymbolRef) {
ex.key = to_fun_args(ex.key, 0, [ex.key], ex.default);
}
ex.value = to_fun_args(ex.value, 0, [ex.key], ex.default);
return ex;
} else if (ex instanceof AST_Hole) {
return ex;
} else if (ex instanceof AST_Destructuring) {
if (ex.names.length == 0)
croak("Invalid destructuring function parameter", ex.start.line, ex.start.col);
@@ -424,8 +426,6 @@ var AST_ArrowParametersOrSeq = DEFNODE("ArrowParametersOrSeq", "expressions", {
} else if (ex instanceof AST_Expansion) {
return ex;
} else if (ex instanceof AST_Array) {
if (ex.elements.length === 0)
croak("Invalid destructuring function parameter", ex.start.line, ex.start.col);
return new AST_Destructuring({
start: ex.start,
end: ex.end,
@@ -494,6 +494,11 @@ var AST_Defun = DEFNODE("Defun", null, {
/* -----[ DESTRUCTURING ]----- */
var AST_Destructuring = DEFNODE("Destructuring", "names is_array default", {
$documentation: "A destructuring of several names. Used in destructuring assignment and with destructuring function argument names",
$propdoc: {
"names": "[AST_Destructuring|AST_Expansion|AST_Hole|AST_ObjectKeyVal|AST_Symbol] Array of properties or elements",
"is_array": "[Boolean] Whether the destructuring represents an object or array",
"default": "[AST_Node?] Default assign value"
},
_walk: function(visitor) {
return visitor._visit(this, function(){
this.names.forEach(function(name){
@@ -1001,11 +1006,11 @@ var AST_ObjectProperty = DEFNODE("ObjectProperty", "key value", {
}
});
var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", "quote shorthand", {
var AST_ObjectKeyVal = DEFNODE("ObjectKeyVal", "quote default", {
$documentation: "A key: value object property",
$propdoc: {
quote: "[string] the original quote character",
shorthand: "[boolean] whether this is a shorthand key:value pair, expressed as just the key."
default: "[AST_Expression] The default parameter value, only used when nested inside a binding pattern"
}
}, AST_ObjectProperty);
@@ -1068,13 +1073,19 @@ var AST_ClassExpression = DEFNODE("ClassExpression", null, {
$documentation: "A class expression."
}, AST_Class);
var AST_Symbol = DEFNODE("Symbol", "scope name thedef", {
var AST_Symbol = DEFNODE("Symbol", "scope name thedef default", {
$propdoc: {
name: "[string] name of this symbol",
scope: "[AST_Scope/S] the current scope (not necessarily the definition scope)",
thedef: "[SymbolDef/S] the definition of this symbol"
thedef: "[SymbolDef/S] the definition of this symbol",
default: "[AST_Expression] The default parameter value, only used when nested inside a binding pattern"
},
$documentation: "Base class for all symbols",
_walk: function (visitor) {
return visitor._visit(this, function() {
if (this.default) this.default._walk(visitor);
});
}
});
var AST_NewTarget = DEFNODE("NewTarget", null, {
@@ -1085,17 +1096,11 @@ var AST_SymbolAccessor = DEFNODE("SymbolAccessor", null, {
$documentation: "The name of a property accessor (setter/getter function)"
}, AST_Symbol);
var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init default", {
var AST_SymbolDeclaration = DEFNODE("SymbolDeclaration", "init", {
$documentation: "A declaration symbol (symbol in var/const, function name or argument, symbol in catch)",
$propdoc: {
init: "[AST_Node*/S] array of initializers for this declaration.",
default: "[AST_Expression] The default for this parameter. For example, `= 6`"
init: "[AST_Node*/S] array of initializers for this declaration."
},
_walk: function (visitor) {
return visitor._visit(this, function() {
if (this.default) this.default._walk(visitor);
});
}
}, AST_Symbol);
var AST_SymbolVar = DEFNODE("SymbolVar", null, {