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Code Issues Packages Projects Releases 10 Wiki Activity

Pointers (#1060)

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* Naive pointer implementation

* Bug fixes and better pointer tests

* Remove debug print statement

* Implement changes suggested by @geoffromer

Also add a failing test case that tests applying the address-of operator
to an rvalue.
This commit is contained in:
Darshal Shetty
2022-02-05 10:27:54 -05:00
committed by GitHub
parent f6cbd2231e
commit 4479c55305
11 changed files with 131 additions and 5 deletions
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executable_semantics/testdata/pointer/basic.carbon
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// RUN: %{executable_semantics} %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
// RUN: %{executable_semantics} --trace %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
// AUTOUPDATE: %{executable_semantics} %s
// CHECK: result: 0
package ExecutableSemanticsTest api;
fn Main() -> i32 {
var x: i32 = 5;
x = 10; // changes x to 10
var p: i32* = &x;
*p = 7; // changes x to 7
var q: i32* = &*p;
*q = 0; // changes x to 0
var y: i32 = *p;
return y;
}
executable_semantics/testdata/pointer/fail_rvalue_addressof.carbon
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// RUN: %{not} %{executable_semantics} %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
// RUN: %{not} %{executable_semantics} --trace %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
// AUTOUPDATE: %{executable_semantics} %s
// CHECK: COMPILATION ERROR: {{.*}}/executable_semantics/testdata/pointer/fail_rvalue_addressof.carbon:16: Argument to & should be an lvalue.
package ExecutableSemanticsTest api;
fn Main() -> i32 {
var x: i32 = 5;
var p: i32* = &5;
return 0;
}
executable_semantics/testdata/pointer/struct_pointer.carbon
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// RUN: %{executable_semantics} %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes=false %s
// RUN: %{executable_semantics} --trace %s 2>&1 | \
// RUN: %{FileCheck} --match-full-lines --allow-unused-prefixes %s
// AUTOUPDATE: %{executable_semantics} %s
// CHECK: result: 0
package ExecutableSemanticsTest api;
fn Main() -> i32 {
var x: auto = {.x = 10, .y = 1};
var p: i32* = &x.x;
*p = 0;
return x.x;
}