INDIRECTION REQUIRES POINTER OPERAND DRIVER
INDIRECTION REQUIRES POINTER OPERAND FULL
INDIRECTION REQUIRES POINTER OPERAND CODE
INDIRECTION REQUIRES POINTER OPERAND PLUS

INDIRECTION REQUIRES POINTER OPERAND CODE

For example, if we take a small snippet of code such as: In C++, type preservation includes retaining any qualification written into type names. $ clang -fsyntax-only t.c t.c:13:9: error: member reference base type 'pid_t' (aka 'int') is not a structure or union myvar = myvar.x ~~~~~ ^ System 'pid_t' typedef is defined, Clang helpfully displays it with 'aka'. If the user was somehow confused about how the The following example shows where it is useful for the compiler to expose $ clang -fsyntax-only t.c t.c:15:11: error: can't convert between vector values of different size ('_m128' and 'int const *') myvec/P ~~~~~~~~^~ The following example shows where it is important to preserve Trivial types and it is important to strip off the typedef to understand what However, sometimes very simple typedefs can wrap This is useful because theyĬan abbreviate otherwise very long types and it is useful to preserve the Syntactic sugar to refer to types in their program. Many programmers use high-level user defined types, typedefs, and other

$ clang -fsyntax-only t.c t.c:5:11: error: indirection requires pointer operand ('int' invalid) int y = *SomeA.X ^~~~~~~~ Typedef Preservation and Selective Unwrapping T.c:5:11: error: invalid type argument of unary '*' (have 'int') Sort of attention to detail makes it much easier to understand and fix problems In the following example, not only do we tell youĪnd point to it, we say exactly why and tell you what the type is (in case it isĪ complicated subexpression, such as a call to an overloaded function). The left and right hand sides, and we don't repeat what is obvious from the In the example above, we tell you what the inferred types are for Out of clang contain exactly the pertinent information about what is wrong and $ clang -fsyntax-only t.c t.c:7:39: error: invalid operands to binary expression ('int' and 'struct A') return y + func(y ? ((SomeA.X + 40) + SomeA) / 42 + SomeA.X : SomeA.X) ~~~~~~~~~~~~~~ ^ ~~~~~ Precision in WordingĪ detail is that we have tried really hard to make the diagnostics that come Return y + func(y ? ((SomeA.X + 40) + SomeA) / 42 + SomeA.X : SomeA.X) T.c:7:39: error: invalid operands to binary + (have 'int' and 'struct A') Immediately obvious what the compiler is talking about.Ĭases involving precedence issues and many other cases.

INDIRECTION REQUIRES POINTER OPERAND PLUS

Information highlights the left and right side of the plus which makes it Point, you know exactly which plus it is complaining about. Understand what is wrong based on the Clang error. Nonsensical example you can see that you don't even need to see the original source code to Statements, and other constructs in your program and uses this to makeĭiagnostics highlight related information. Range Highlighting for Related TextĬlang captures and accurately tracks range information for expressions,

Pointing at the problematic format specifier, rather than the )Ĭharacter the parser had reached when the problem was detected.Īlso, Clang's diagnostic is colored by default, making it easier toĭistinguish from nearby text. However, Clang's column number is much more accurate, Now able to give a column for a diagnostic, and include a snippet of source Note that modern versions of GCC have followed Clang's lead, and are $ clang -fsyntax-only format-strings.c format-strings.c:91:13: warning: '.*' specified field precision is missing a matching 'int' argument printf('%.*d') ^ Revisit this more in following examples.) Helps when multiple instances of the same character occur on a line. This makes it really easy to jump to the problem and The point (the green '^' character) exactly shows where the problem is, even

What is wrong in a particular piece of code. This is nice because it makes it very easy to understand exactly (IDEs can use the information to display in-line error markup.)

INDIRECTION REQUIRES POINTER OPERAND DRIVER

The clang command-line compiler driver uses this information

INDIRECTION REQUIRES POINTER OPERAND FULL

Talks about the experience provided by the command line compiler, contrastingĬlang output to GCC 4.9's output in some cases.įirst, all diagnostics produced by clang include full column number Making the diagnostics (error and warning messages) generated by the compilerīe as useful as possible. As far as a command-line compiler goes, this basically boils down to In addition to being fast and functional, we aim to make Clang extremely userįriendly.

Indirection requires pointer operand