yosys/tests/various/sv_defines_too_few.ys

# Check that we don't allow passing too few arguments (and, while we're at it, check that passing "no"
# arguments actually passes 1 empty argument).
logger -expect error "Cannot expand macro `foo by giving only 1 argument \(argument 2 has no default\)." 1
read_verilog <<EOT
`define foo(x=1, y)
`foo()
EOT
Add support for SystemVerilog-style `define to Verilog frontend This patch should support things like `define foo(a, b = 3, c) a+b+c `foo(1, ,2) which will evaluate to 1+3+2. It also spots mistakes like `foo(1) (the 3rd argument doesn't have a default value, so a call site is required to set it). Most of the patch is a simple parser for the format in preproc.cc, but I've also taken the opportunity to wrap up the "name -> definition" map in a type, rather than use multiple std::map's. Since this type needs to be visible to code that touches defines, I've pulled it (and the frontend_verilog_preproc declaration) out into a new file at frontends/verilog/preproc.h and included that where necessary. Finally, the patch adds a few tests in tests/various to check that we are parsing everything correctly. 2020-03-17 04:34:31 -05:00			`# Check that we don't allow passing too few arguments (and, while we're at it, check that passing "no"`
			`# arguments actually passes 1 empty argument).`
			logger -expect error "Cannot expand macro `foo by giving only 1 argument \(argument 2 has no default\)." 1
			`read_verilog <<EOT`
			`define foo(x=1, y)
			`foo()
			`EOT`