compile: compile_stmt is a noop on null PExpr

This simplify the code.

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/compiling/compiling_methods.nit b/src/compiling/compiling_methods.nit
index 6ec048a..4955594 100644 (file)
--- a/src/compiling/compiling_methods.nit
+++ b/src/compiling/compiling_methods.nit
@@ -24,6 +24,7 @@ redef class CompilerVisitor
        # Compile a statment node
        meth compile_stmt(n: PExpr)
        do
+               if n == null then return
                add_instr("/* Compile stmt {n.locate} */")
                n.prepare_compile_stmt(self)
                var i = cfc._variable_index
@@ -680,9 +681,7 @@ redef class AConcreteMethPropdef
                if self isa AConcreteInitPropdef then
                        v.invoke_super_init_calls_after(null)
                end
-               if n_block != null then
-                       v.compile_stmt(n_block)
-               end
+               v.compile_stmt(n_block)
                v.add_instr("{v.nmc.return_label}: while(false);")
                if self isa AConcreteInitPropdef then
                        v.add_instr("init_table[{itpos}] = 1;")
@@ -1001,9 +1000,7 @@ end
 redef class ADoExpr
        redef meth compile_stmt(v)
        do
-                if n_block != null then
-                        v.compile_stmt(n_block)
-                end
+               v.compile_stmt(n_block)
        end
 end
 
@@ -1074,9 +1071,7 @@ redef class AWhileExpr
                var e = v.compile_expr(n_expr)
                v.add_instr("if (!UNTAG_Bool({e})) break; /* while*/")
                v.cfc.free_var(e)
-               if n_block != null then
-                       v.compile_stmt(n_block)
-               end
+               v.compile_stmt(n_block)
                v.add_instr("{v.nmc.continue_label}: while(0);")
                v.unindent
                v.add_instr("}")
@@ -1102,10 +1097,7 @@ redef class AForExpr
                e = v.ensure_var(e, "For item")
                var cname = v.cfc.register_variable(variable)
                v.add_assignment(cname, e)
-               var n_block = n_block
-               if n_block != null then
-                       v.compile_stmt(n_block)
-               end
+               v.compile_stmt(n_block)
                v.add_instr("{v.nmc.continue_label}: while(0);")
                e = meth_next.compile_call(v, [iter])
                assert e == null
@@ -1615,7 +1607,7 @@ redef class AClosureDef
                v.nmc.continue_label = "continue_label{v.new_number}"
                v.nmc.break_label = v.nmc.return_label
 
-               if n_expr != null then v.compile_stmt(n_expr)
+               v.compile_stmt(n_expr)
 
                v.add_instr("{v.nmc.continue_label}: while(false);")
 
@@ -1646,7 +1638,7 @@ redef class AClosureDecl
                v.nmc.continue_label = "continue_label{v.new_number}"
                v.nmc.break_label = v.nmc.return_label
 
-               if n_expr != null then v.compile_stmt(n_expr)
+               v.compile_stmt(n_expr)
 
                v.add_instr("{v.nmc.continue_label}: while(false);")