C glue generates invalid syntax for fixed-size array parameters

[sequencer]

When generating C glue code with --c flag, fixed-size array parameters are rendered with incorrect syntax. The array size specifier [N] is placed before the parameter name instead of after.

Reproduction

Input header:

#include <stdint.h>

typedef struct {
  void *ptr;
} Context;

void processWithBounds(Context ctx, int64_t bounds[4]);

Command:

bindgen --header bug2-array-parameter.h --package test.native --link-name test --llvm-bin $LLVM_BIN_PATH --c --flavour scala-native05 --c-import "bug2-array-parameter.h" --clang-include .

Generated output (invalid):

void __sn_wrap_test_native_processWithBounds(Context *ctx, int64_t[4] bounds) {
  processWithBounds(*ctx, bounds);
};

Expected output (valid C):

void __sn_wrap_test_native_processWithBounds(Context *ctx, int64_t bounds[4]) {
  processWithBounds(*ctx, bounds);
}

Or equivalently (since arrays decay to pointers in function parameters):

void __sn_wrap_test_native_processWithBounds(Context *ctx, int64_t *bounds) {
  processWithBounds(*ctx, bounds);
}

Compiler Error

error: expected ')'
void __sn_wrap_test_native_processWithBounds(Context *ctx, int64_t[4] bounds)
   ^

Analysis

In C, array parameter declarations require the parameter name before the size specifier:

• Invalid: int64_t[4] bounds
• Valid: int64_t bounds[4] or int64_t *bounds