vuurraaf/bear
1
0
Fork 0
mirror of https://github.com/bearlanguageorg/bear.git synced 2026-08-26 15:37:18 +00:00
Code Issues Packages Projects Releases Wiki Activity

continue/break

Browse Source
This commit is contained in:
allexanderbergmns
2026-08-24 15:41:37 +02:00
parent 18b0b38490
commit 55a3ee0b18
6 changed files with 135 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
compiler/compiler.v
+37
View File
@@ -66,6 +66,14 @@ struct Fixup {
off u32
}
// LoopCtx records where `break` and `continue` should jump while generating
// the body of a loop. For `for` loops `continue` targets the increment, not
// the condition check, so the loop variable still advances.
struct LoopCtx {
break_l string
continue_l string
}
struct Gen {
mut:
code []u8
@@ -79,6 +87,7 @@ mut:
cur_fn string
labels map[string]int
fixups []Fixup
loops []LoopCtx
enter_off u32
next_lbl int
}
@@ -189,9 +198,11 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
g.code << op_jz
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: end_l, off: u32(g.code.len) - 8 }
g.loops << LoopCtx{ break_l: end_l, continue_l: loop_l }
for s in st.body {
g.gen_stmt(s)!
}
g.loops.delete_last()
g.code << op_jmp
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: loop_l, off: u32(g.code.len) - 8 }
@@ -202,6 +213,7 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
var_idx := g.new_local()
bound_idx := g.new_local()
loop_l := g.new_label()
inc_l := g.new_label()
end_l := g.new_label()
g.gen_expr(st.expr)!
g.gen_expr(st.cond)!
@@ -214,6 +226,7 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
g.code << op_jz
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: end_l, off: u32(g.code.len) - 8 }
g.loops << LoopCtx{ break_l: end_l, continue_l: inc_l }
prev := g.locals[st.target] or { -1 }
g.locals[st.target] = var_idx
for s in st.body {
@@ -224,6 +237,8 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
} else {
g.locals.delete(st.target)
}
g.loops.delete_last()
g.emit_label(inc_l)
g.emit_load(var_idx)
g.code << op_push_i
g.code << obj.encode_i64(1)
@@ -240,6 +255,7 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
idx_idx := g.new_local()
elem_idx := g.new_local()
loop_l := g.new_label()
inc_l := g.new_label()
end_l := g.new_label()
g.gen_expr(st.expr)!
g.emit_store(arr_idx)
@@ -254,6 +270,7 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
g.code << op_jz
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: end_l, off: u32(g.code.len) - 8 }
g.loops << LoopCtx{ break_l: end_l, continue_l: inc_l }
g.emit_load(arr_idx)
g.emit_load(idx_idx)
g.code << op_aget
@@ -268,6 +285,8 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
} else {
g.locals.delete(st.target)
}
g.loops.delete_last()
g.emit_label(inc_l)
g.emit_load(idx_idx)
g.code << op_push_i
g.code << obj.encode_i64(1)
@@ -290,6 +309,24 @@ fn (mut g Gen) gen_stmt(st Stmt) ! {
g.gen_expr(st.expr)!
g.code << op_assert
}
.break_stmt {
if g.loops.len == 0 {
return error('break outside of a loop (line ${st.line})')
}
ctx := g.loops[g.loops.len - 1]
g.code << op_jmp
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: ctx.break_l, off: u32(g.code.len) - 8 }
}
.continue_stmt {
if g.loops.len == 0 {
return error('continue outside of a loop (line ${st.line})')
}
ctx := g.loops[g.loops.len - 1]
g.code << op_jmp
g.code << obj.encode_i64(0)
g.fixups << Fixup{ name: ctx.continue_l, off: u32(g.code.len) - 8 }
}
}
}