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Fixed a function expression parsing issue
Also uncovered a yet-to-be-fixed issue when immediately calling a returned function
1 parent 7870e3a commit c93f0bb

10 files changed

+51
-65
lines changed

‎dist/assemblyscript.js

Lines changed: 1 addition & 1 deletion
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‎dist/assemblyscript.js.map

Lines changed: 1 addition & 1 deletion
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‎src/extra/ast.ts

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -124,6 +124,10 @@ export function serializeNode(node: Node, sb: string[]): void {
124124
serializeCallExpression(<CallExpression>node, sb);
125125
break;
126126
}
127+
case NodeKind.COMMA: {
128+
serializeCommaExpression(<CommaExpression>node, sb);
129+
break;
130+
}
127131
case NodeKind.ELEMENTACCESS: {
128132
serializeElementAccessExpression(<ElementAccessExpression>node, sb);
129133
break;

‎src/parser.ts

Lines changed: 8 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -2810,11 +2810,14 @@ export class Parser extends DiagnosticEmitter {
28102810
if (!expr) return null;
28112811
var startPos = expr.range.start;
28122812

2813-
// CallExpression
2814-
var typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn); // skips '(' on success
2815-
// there might be better ways to distinguish a LESSTHAN from a CALL with type arguments
2816-
if (typeArguments || tn.skip(Token.OPENPAREN)) {
2817-
var args = this.parseArguments(tn);
2813+
// CallExpression with type arguments
2814+
var typeArguments: CommonTypeNode[] | null;
2815+
while (
2816+
// there might be better ways to distinguish a LESSTHAN from a CALL with type arguments
2817+
(typeArguments = this.tryParseTypeArgumentsBeforeArguments(tn)) ||
2818+
tn.skip(Token.OPENPAREN)
2819+
) {
2820+
let args = this.parseArguments(tn);
28182821
if (!args) return null;
28192822
expr = Node.createCallExpression(expr, typeArguments, args, tn.range(startPos, tn.pos));
28202823
}

‎src/program.ts

Lines changed: 27 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -1697,24 +1697,27 @@ export class Program extends DiagnosticEmitter {
16971697
expression: Expression,
16981698
contextualFunction: Function
16991699
): ResolvedElement | null {
1700-
var classType: Class | null;
17011700
while (expression.kind == NodeKind.PARENTHESIZED) {
17021701
expression = (<ParenthesizedExpression>expression).expression;
17031702
}
17041703
switch (expression.kind) {
17051704
case NodeKind.ASSERTION: {
1706-
var type = this.resolveType((<AssertionExpression>expression).toType); // reports
1707-
if (type && (classType = type.classType)) {
1708-
if (!resolvedElement) resolvedElement = new ResolvedElement();
1709-
return resolvedElement.set(classType);
1705+
let type = this.resolveType((<AssertionExpression>expression).toType); // reports
1706+
if (type) {
1707+
let classType = type.classType;
1708+
if (classType) {
1709+
if (!resolvedElement) resolvedElement = new ResolvedElement();
1710+
return resolvedElement.set(classType);
1711+
}
17101712
}
17111713
return null;
17121714
}
17131715
case NodeKind.BINARY: { // TODO: string concatenation, mostly
17141716
throw new Error("not implemented");
17151717
}
17161718
case NodeKind.THIS: { // -> Class
1717-
if (classType = contextualFunction.instanceMethodOf) {
1719+
let classType = contextualFunction.instanceMethodOf;
1720+
if (classType) {
17181721
if (!resolvedElement) resolvedElement = new ResolvedElement();
17191722
return resolvedElement.set(classType);
17201723
}
@@ -1725,7 +1728,8 @@ export class Program extends DiagnosticEmitter {
17251728
return null;
17261729
}
17271730
case NodeKind.SUPER: { // -> Class
1728-
if ((classType = contextualFunction.instanceMethodOf) && (classType = classType.base)) {
1731+
let classType = contextualFunction.instanceMethodOf;
1732+
if (classType && (classType = classType.base)) {
17291733
if (!resolvedElement) resolvedElement = new ResolvedElement();
17301734
return resolvedElement.set(classType);
17311735
}
@@ -1751,21 +1755,31 @@ export class Program extends DiagnosticEmitter {
17511755
);
17521756
}
17531757
case NodeKind.CALL: {
1754-
var resolved = this.resolveExpression(
1758+
let resolved = this.resolveExpression(
17551759
(<CallExpression>expression).expression,
17561760
contextualFunction
17571761
);
17581762
if (resolved) {
1759-
var element = resolved.element;
1763+
let element = resolved.element;
17601764
if (element && element.kind == ElementKind.FUNCTION_PROTOTYPE) {
1761-
var instance = (<FunctionPrototype>element).resolveUsingTypeArguments(
1765+
let instance = (<FunctionPrototype>element).resolveUsingTypeArguments(
17621766
(<CallExpression>expression).typeArguments,
17631767
null,
17641768
expression
17651769
);
1766-
if (instance && (classType = instance.signature.returnType.classType)) {
1767-
if (!resolvedElement) resolvedElement = new ResolvedElement();
1768-
return resolvedElement.set(classType);
1770+
if (instance) {
1771+
let returnType = instance.signature.returnType;
1772+
let classType = returnType.classType;
1773+
if (classType) {
1774+
if (!resolvedElement) resolvedElement = new ResolvedElement();
1775+
return resolvedElement.set(classType);
1776+
} else {
1777+
let functionType = returnType.functionType;
1778+
if (functionType) {
1779+
// TODO: Signatures aren't elements but probably should be
1780+
throw new Error("not implemented");
1781+
}
1782+
}
17691783
}
17701784
}
17711785
}

‎tests/compiler/function-types.optimized.wat

Lines changed: 3 additions & 16 deletions
Original file line numberDiff line numberDiff line change
@@ -2,12 +2,11 @@
22
(type $i (func (result i32)))
33
(type $iii (func (param i32 i32) (result i32)))
44
(type $III (func (param i64 i64) (result i64)))
5-
(type $FFF (func (param f64 f64) (result f64)))
65
(type $v (func))
76
(global $function-types/i32Adder (mut i32) (i32.const 0))
87
(global $function-types/i64Adder (mut i32) (i32.const 0))
9-
(table 3 3 anyfunc)
10-
(elem (i32.const 0) $function-types/makeAdder<i32>~anonymous|0 $function-types/makeAdder<i64>~anonymous|1 $function-types/makeAdder<f64>~anonymous|2)
8+
(table 2 2 anyfunc)
9+
(elem (i32.const 0) $function-types/makeAdder<i32>~anonymous|0 $function-types/makeAdder<i64>~anonymous|1)
1110
(memory $0 1)
1211
(export "memory" (memory $0))
1312
(start $start)
@@ -29,16 +28,7 @@
2928
(func $function-types/makeAdder<i64> (; 3 ;) (type $i) (result i32)
3029
(i32.const 1)
3130
)
32-
(func $function-types/makeAdder<f64>~anonymous|2 (; 4 ;) (type $FFF) (param $0 f64) (param $1 f64) (result f64)
33-
(f64.add
34-
(get_local $0)
35-
(get_local $1)
36-
)
37-
)
38-
(func $function-types/makeAdder<f64> (; 5 ;) (type $i) (result i32)
39-
(i32.const 2)
40-
)
41-
(func $start (; 6 ;) (type $v)
31+
(func $start (; 4 ;) (type $v)
4232
(set_global $function-types/i32Adder
4333
(call $function-types/makeAdder<i32>)
4434
)
@@ -59,8 +49,5 @@
5949
(get_global $function-types/i64Adder)
6050
)
6151
)
62-
(drop
63-
(call $function-types/makeAdder<f64>)
64-
)
6552
)
6653
)

‎tests/compiler/function-types.ts

Lines changed: 2 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -12,4 +12,5 @@ i32Adder(1, 2);
1212
var i64Adder = makeAdder<i64>();
1313
i64Adder(1, 2);
1414

15-
makeAdder<f64>()(1, 2);
15+
// TODO:
16+
// makeAdder<f64>()(1, 2);

‎tests/compiler/function-types.untouched.wat

Lines changed: 3 additions & 28 deletions
Original file line numberDiff line numberDiff line change
@@ -2,13 +2,12 @@
22
(type $i (func (result i32)))
33
(type $iii (func (param i32 i32) (result i32)))
44
(type $III (func (param i64 i64) (result i64)))
5-
(type $FFF (func (param f64 f64) (result f64)))
65
(type $v (func))
76
(global $function-types/i32Adder (mut i32) (i32.const 0))
87
(global $function-types/i64Adder (mut i32) (i32.const 0))
98
(global $HEAP_BASE i32 (i32.const 4))
10-
(table 3 3 anyfunc)
11-
(elem (i32.const 0) $function-types/makeAdder<i32>~anonymous|0 $function-types/makeAdder<i64>~anonymous|1 $function-types/makeAdder<f64>~anonymous|2)
9+
(table 2 2 anyfunc)
10+
(elem (i32.const 0) $function-types/makeAdder<i32>~anonymous|0 $function-types/makeAdder<i64>~anonymous|1)
1211
(memory $0 1)
1312
(export "memory" (memory $0))
1413
(start $start)
@@ -38,20 +37,7 @@
3837
(i32.const 1)
3938
)
4039
)
41-
(func $function-types/makeAdder<f64>~anonymous|2 (; 4 ;) (type $FFF) (param $0 f64) (param $1 f64) (result f64)
42-
(return
43-
(f64.add
44-
(get_local $0)
45-
(get_local $1)
46-
)
47-
)
48-
)
49-
(func $function-types/makeAdder<f64> (; 5 ;) (type $i) (result i32)
50-
(return
51-
(i32.const 2)
52-
)
53-
)
54-
(func $start (; 6 ;) (type $v)
40+
(func $start (; 4 ;) (type $v)
5541
(nop)
5642
(set_global $function-types/i32Adder
5743
(call $function-types/makeAdder<i32>)
@@ -73,16 +59,5 @@
7359
(get_global $function-types/i64Adder)
7460
)
7561
)
76-
(drop
77-
(call $function-types/makeAdder<f64>)
78-
)
79-
(block
80-
(drop
81-
(i32.const 1)
82-
)
83-
(drop
84-
(i32.const 2)
85-
)
86-
)
8762
)
8863
)

‎tests/parser/call-function-return.ts

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
a = fn()(1, 2);

‎tests/parser/call-function-return.ts.fixture.ts

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
a = fn()(1, 2);

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