Johnni Winther
c6347389d2
This moves pattern variable assignments of fully matched expressions into the case body. This will help backends (dart2js in particular) to reason about the code flow. Closes #54115 Change-Id: I598a384a829f16e91ab2d6a309499cf20b9cc121 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/339122 Commit-Queue: Johnni Winther <johnniwinther@google.com> Reviewed-by: Jens Johansen <jensj@google.com>
288 lines
12 KiB
Plaintext
288 lines
12 KiB
Plaintext
library;
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//
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// Problems in library:
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:13:13: Error: The argument type 'int' can't be assigned to the parameter type 'Class'.
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// - 'Class' is from 'pkg/front_end/testcases/patterns/shared_errors.dart'.
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// case >= 0: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:20:10: Error: A value of type 'Class' can't be assigned to a variable of type 'bool'.
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// - 'Class' is from 'pkg/front_end/testcases/patterns/shared_errors.dart'.
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// case > 0: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:26:12: Error: The matched value of type 'List<String>' isn't assignable to the required type 'List<int>'.
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// - 'List' is from 'dart:core'.
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// Try changing the required type of the pattern, or the matched value type.
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// var <int>[a] = list; // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:31:7: Error: The variable 'a' is already assigned in this pattern.
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// Try renaming the variable.
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// [a, a] = list; // Error
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// ^
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// pkg/front_end/testcases/patterns/shared_errors.dart:31:4: Context: The first assigned variable pattern.
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// [a, a] = list; // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:36:28: Error: The field 'field' is already matched in this pattern.
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// Try removing the duplicate field.
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// case (field: 1, field: 2): // Error
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// ^
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// pkg/front_end/testcases/patterns/shared_errors.dart:36:18: Context: The first field.
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// case (field: 1, field: 2): // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:37:33: Error: The field 'field' is already matched in this pattern.
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// Try removing the duplicate field.
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// case Class(field: 1, field: 2): // Error
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// ^
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// pkg/front_end/testcases/patterns/shared_errors.dart:37:23: Context: The first field.
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// case Class(field: 1, field: 2): // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:44:16: Error: At most one rest element is allowed in a list or map pattern.
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// Try removing the duplicate rest element.
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// case [..., ...]: // Error
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// ^
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// pkg/front_end/testcases/patterns/shared_errors.dart:44:11: Context: The first rest element.
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// case [..., ...]: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:45:11: Error: The '...' pattern can't appear in map patterns.
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// case {..., ...}: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:45:16: Error: The '...' pattern can't appear in map patterns.
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// case {..., ...}: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:51:10: Error: A map pattern must have at least one entry.
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// Try replacing it with an object pattern 'Map()'.
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// case {}: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:57:11: Error: The '...' pattern can't appear in map patterns.
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// case {...}: // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:62:23: Warning: The null-assert pattern will have no effect because the matched type isn't nullable.
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// Try replacing the null-assert pattern with its nested pattern.
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// if (list case [var a!, var b?]) { // Warnings
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:62:31: Warning: The null-check pattern will have no effect because the matched type isn't nullable.
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// Try replacing the null-check pattern with its nested pattern.
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// if (list case [var a!, var b?]) { // Warnings
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:68:21: Error: Conditions must have a static type of 'bool'.
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// Try changing the condition.
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// if (i case 0 when i) { // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:74:9: Error: Refutable patterns can't be used in an irrefutable context.
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// Try using an if-case, a 'switch' statement, or a 'switch' expression instead.
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// var (a?) = x; // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:78:15: Error: The '...' pattern can't appear in map patterns.
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// if (o case {..., 5: 3}) { // Error
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// ^
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//
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// pkg/front_end/testcases/patterns/shared_errors.dart:84:21: Error: The '...' pattern can't appear in map patterns.
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// if (o case {5: 3, ...var a}) { // Error
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// ^
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//
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import self as self;
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import "dart:core" as core;
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class Class extends core::Object {
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synthetic constructor •() → self::Class
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: super core::Object::•()
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;
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get field() → core::int
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return 42;
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operator >=(self::Class cls) → core::bool
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return true;
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operator >(core::int i) → self::Class
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return new self::Class::•();
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}
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static method argumentTypeNotAssignable(self::Class cls) → dynamic {
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#L1:
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{
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final synthesized self::Class #0#0 = cls;
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{
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if(invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:13:13: Error: The argument type 'int' can't be assigned to the parameter type 'Class'.
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- 'Class' is from 'pkg/front_end/testcases/patterns/shared_errors.dart'.
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case >= 0: // Error
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^") {
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{
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core::print(0);
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}
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}
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}
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}
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}
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static method relationalPatternOperatorReturnTypeNotAssignableToBool(self::Class cls) → dynamic {
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#L2:
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{
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final synthesized self::Class #0#0 = cls;
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{
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if(invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:20:10: Error: A value of type 'Class' can't be assigned to a variable of type 'bool'.
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- 'Class' is from 'pkg/front_end/testcases/patterns/shared_errors.dart'.
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case > 0: // Error
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^") {
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{
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core::print(0);
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}
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}
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}
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}
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}
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static method patternTypeMismatchInIrrefutableContext(core::List<core::String> list) → dynamic {
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has-declared-initializer core::int a;
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{
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final synthesized core::List<core::String> #0#0 = list;
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if(!invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:26:12: Error: The matched value of type 'List<String>' isn't assignable to the required type 'List<int>'.
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- 'List' is from 'dart:core'.
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Try changing the required type of the pattern, or the matched value type.
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var <int>[a] = list; // Error
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^")
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throw new core::StateError::•("Pattern matching error");
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}
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}
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static method duplicateAssignmentPatternVariable(core::List<core::String> list) → dynamic {
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core::String a = "";
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{
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final synthesized core::List<core::String> #0#0 = list;
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if(!(#0#0.{core::List::length}{core::int} =={core::num::==}{(core::Object) → core::bool} #C1 && (let final core::String #t1 = a = #0#0.{core::List::[]}(0){(core::int) → core::String} in true) && invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:31:7: Error: The variable 'a' is already assigned in this pattern.
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Try renaming the variable.
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[a, a] = list; // Error
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^"))
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throw new core::StateError::•("Pattern matching error");
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}
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}
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static method duplicateRecordPatternField(dynamic o) → dynamic {
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#L3:
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{
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final synthesized dynamic #0#0 = o;
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synthesized core::int #0#2;
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synthesized core::bool #0#2#isSet = false;
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{
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if(invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:36:28: Error: The field 'field' is already matched in this pattern.
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Try removing the duplicate field.
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case (field: 1, field: 2): // Error
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^" || #0#0 is self::Class && #C2 =={core::num::==}{(core::Object) → core::bool} (#0#2#isSet ?{core::int} #0#2{core::int} : let final core::bool* #t2 = #0#2#isSet = true in #0#2 = #0#0{self::Class}.{self::Class::field}{core::int}) && (let final core::int #t3 = #0#2#isSet ?{core::int} #0#2{core::int} : let final core::bool* #t4 = #0#2#isSet = true in #0#2 = #0#0{self::Class}.{self::Class::field}{core::int} in invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:37:33: Error: The field 'field' is already matched in this pattern.
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Try removing the duplicate field.
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case Class(field: 1, field: 2): // Error
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^")) {
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{
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core::print(0);
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}
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}
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}
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}
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}
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static method duplicateRestPattern(dynamic o) → dynamic {
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#L4:
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{
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final synthesized dynamic #0#0 = o;
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{
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if(#0#0 is core::List<dynamic> && #0#0{core::List<dynamic>}.{core::List::length}{core::int}.{core::num::>=}(#C2){(core::num) → core::bool} && invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:44:16: Error: At most one rest element is allowed in a list or map pattern.
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Try removing the duplicate rest element.
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case [..., ...]: // Error
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^" || invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:45:11: Error: The '...' pattern can't appear in map patterns.
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case {..., ...}: // Error
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^") {
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}
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}
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}
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}
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static method emptyMapPattern(dynamic o) → dynamic {
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#L5:
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{
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final synthesized dynamic #0#0 = o;
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{
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if(invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:51:10: Error: A map pattern must have at least one entry.
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Try replacing it with an object pattern 'Map()'.
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case {}: // Error
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^") {
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}
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}
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}
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}
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static method singleRestPatternInMap(dynamic o) → dynamic {
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#L6:
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{
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final synthesized dynamic #0#0 = o;
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{
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if(invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:57:11: Error: The '...' pattern can't appear in map patterns.
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case {...}: // Error
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^") {
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}
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}
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}
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}
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static method matchedTypeIsStrictlyNonNullable(core::List<core::int> list) → dynamic {
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{
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hoisted core::int a;
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hoisted core::int b;
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final synthesized core::List<core::int> #0#0 = list;
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synthesized core::int #0#4;
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synthesized core::bool #0#4#isSet = false;
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synthesized core::int #0#6;
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synthesized core::bool #0#6#isSet = false;
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if(#0#0.{core::List::length}{core::int} =={core::num::==}{(core::Object) → core::bool} #C1 && (let final core::int #t5 = (#0#4#isSet ?{core::int} #0#4{core::int} : let final core::bool* #t6 = #0#4#isSet = true in #0#4 = #0#0.{core::List::[]}(0){(core::int) → core::int})! in let final core::int #t7 = a = (#0#4#isSet ?{core::int} #0#4{core::int} : let final core::bool* #t8 = #0#4#isSet = true in #0#4 = #0#0.{core::List::[]}(0){(core::int) → core::int})! in true) && !((#0#6#isSet ?{core::int} #0#6{core::int} : let final core::bool* #t9 = #0#6#isSet = true in #0#6 = #0#0.{core::List::[]}(1){(core::int) → core::int}) == null)) {
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b = #0#6#isSet ?{core::int} #0#6{core::int} : let final core::bool* #t10 = #0#6#isSet = true in #0#6 = #0#0.{core::List::[]}(1){(core::int) → core::int};
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{
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core::print(0);
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}
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}
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}
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}
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static method nonBooleanCondition(core::int i) → dynamic {
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{
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final synthesized core::int #0#0 = i;
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if(#C3 =={core::num::==}{(core::Object) → core::bool} #0#0 && invalid-expression "pkg/front_end/testcases/patterns/shared_errors.dart:68:21: Error: Conditions must have a static type of 'bool'.
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Try changing the condition.
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if (i case 0 when i) { // Error
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^") {
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core::print(0);
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}
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}
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}
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static method refutablePatternInIrrefutableContext(core::int? x) → dynamic {
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hoisted has-declared-initializer core::int a;
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{
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final synthesized core::int? #0#0 = x;
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if(!(!(#0#0 == null) && (let final core::int #t11 = a = #0#0{core::int} in true)))
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throw new core::StateError::•("Pattern matching error");
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}
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}
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static method restPatternNotLastInMap(dynamic o) → dynamic {
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{
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final synthesized dynamic #0#0 = o;
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if(#0#0 is core::Map<dynamic, dynamic> && #0#0{core::Map<dynamic, dynamic>}.{core::Map::containsKey}(#C4){(core::Object?) → core::bool} && #C5 =={core::num::==}{(core::Object) → core::bool} #0#0{core::Map<dynamic, dynamic>}.{core::Map::[]}(#C4){(core::Object?) → dynamic}) {
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core::print(0);
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}
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}
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}
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static method restPatternWithSubPatternInMap(dynamic o) → dynamic {
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{
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final synthesized dynamic #0#0 = o;
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if(#0#0 is core::Map<dynamic, dynamic> && #0#0{core::Map<dynamic, dynamic>}.{core::Map::containsKey}(#C4){(core::Object?) → core::bool} && #C5 =={core::num::==}{(core::Object) → core::bool} #0#0{core::Map<dynamic, dynamic>}.{core::Map::[]}(#C4){(core::Object?) → dynamic}) {
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core::print(0);
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}
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}
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}
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constants {
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#C1 = 2
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#C2 = 1
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#C3 = 0
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#C4 = 5
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#C5 = 3
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}
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