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gccgo: allows to refer to builtin function not in call expression #11570

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dvyukov opened this issue Jul 3, 2015 · 2 comments
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gccgo: allows to refer to builtin function not in call expression #11570

dvyukov opened this issue Jul 3, 2015 · 2 comments
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@dvyukov
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dvyukov commented Jul 3, 2015

gccgo successfully compiles the following program:

package p
func _() {
    f := complex
    _ = f
}

while gc and go/types say:

go.go:3:9: error: invalid use of special builtin function ‘complex’; must be called
go.go:3: use of builtin complex not in function call

The spec says:

The built-in functions do not have standard Go types, so they can only appear in call expressions; they cannot be used as function values.

http://golang.org/ref/spec#Built-in_functions

gcc version 6.0.0 2015070 (experimental) (GCC)
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dvyukov commented Jul 3, 2015

@paranoiacblack

@ianlancetaylor ianlancetaylor added this to the Gccgo milestone Jul 10, 2015
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CL https://golang.org/cl/12543 mentions this issue.

Cl3Kener pushed a commit to UBERTC/GCC-UBER that referenced this issue Jul 31, 2015
compiler: Don't allow builtin function values.
8b3c974 
    
    According to the spec, http://golang.org/ref/spec#Built-in_functions:
    "built-in functions do not have standard Go types, so they can only
    appear in call expressions; they cannot be used as function values."
    
    Fixes golang/go#11570.
    
    Reviewed-on: https://go-review.googlesource.com/12543


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@226448 138bc75d-0d04-0410-961f-82ee72b054a4
@golang golang locked and limited conversation to collaborators Aug 5, 2016
asiekierka pushed a commit to WonderfulToolchain/gcc-ia16 that referenced this issue May 16, 2022
compiler: Don't allow builtin function values.
2e2fc3b 
    
    According to the spec, http://golang.org/ref/spec#Built-in_functions:
    "built-in functions do not have standard Go types, so they can only
    appear in call expressions; they cannot be used as function values."
    
    Fixes golang/go#11570.
    
    Reviewed-on: https://go-review.googlesource.com/12543

From-SVN: r226448
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