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checker: minor cleanup and speedups in fn_call() (#14343)

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yuyi 2022-05-10 21:41:47 +08:00 committed by GitHub
parent 5697d4375b
commit 8f765ed5f1
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1 changed files with 18 additions and 25 deletions
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43
vlib/v/checker/fn.v
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@ -496,8 +496,7 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
}
}
panic('unreachable')
} else if fn_name == 'json.encode' {
} else if fn_name == 'json.decode' && node.args.len > 0 {
} else if node.args.len > 0 && fn_name == 'json.decode' {
if node.args.len != 2 {
c.error("json.decode expects 2 arguments, a type and a string (e.g `json.decode(T, '')`)",
node.pos)
@ -558,13 +557,11 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
c.table.fns[name_prefixed].usages++
}
}
if !found && node.left is ast.IndexExpr {
if !found && mut node.left is ast.IndexExpr {
c.expr(node.left)
expr := node.left as ast.IndexExpr
sym := c.table.sym(expr.left_type)
if sym.kind == .array {
info := sym.info as ast.Array
elem_sym := c.table.sym(info.elem_type)
sym := c.table.sym(node.left.left_type)
if sym.info is ast.Array {
elem_sym := c.table.sym(sym.info.elem_type)
if elem_sym.info is ast.FnType {
node.return_type = elem_sym.info.func.return_type
return elem_sym.info.func.return_type
@ -572,18 +569,16 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
c.error('cannot call the element of the array, it is not a function',
node.pos)
}
} else if sym.kind == .map {
info := sym.info as ast.Map
value_sym := c.table.sym(info.value_type)
} else if sym.info is ast.Map {
value_sym := c.table.sym(sym.info.value_type)
if value_sym.info is ast.FnType {
node.return_type = value_sym.info.func.return_type
return value_sym.info.func.return_type
} else {
c.error('cannot call the value of the map, it is not a function', node.pos)
}
} else if sym.kind == .array_fixed {
info := sym.info as ast.ArrayFixed
elem_sym := c.table.sym(info.elem_type)
} else if sym.info is ast.ArrayFixed {
elem_sym := c.table.sym(sym.info.elem_type)
if elem_sym.info is ast.FnType {
node.return_type = elem_sym.info.func.return_type
return elem_sym.info.func.return_type
@ -595,15 +590,13 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
found = true
return ast.string_type
}
if !found && node.left is ast.CallExpr {
if !found && mut node.left is ast.CallExpr {
c.expr(node.left)
expr := node.left as ast.CallExpr
sym := c.table.sym(expr.return_type)
if sym.kind == .function {
info := sym.info as ast.FnType
node.return_type = info.func.return_type
sym := c.table.sym(node.left.return_type)
if sym.info is ast.FnType {
node.return_type = sym.info.func.return_type
found = true
func = info.func
func = sym.info.func
}
}
// already prefixed (mod.fn) or C/builtin/main
@ -730,8 +723,8 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
c.warn('function `$func.name` must be called from an `unsafe` block', node.pos)
}
node.is_keep_alive = func.is_keep_alive
if func.mod != 'builtin' && func.language == .v && func.no_body && !c.pref.translated
&& !c.file.is_translated && !func.is_unsafe {
if func.language == .v && func.no_body && !c.pref.translated && !c.file.is_translated
&& !func.is_unsafe && func.mod != 'builtin' {
c.error('cannot call a function that does not have a body', node.pos)
}
if node.concrete_types.len > 0 && func.generic_names.len > 0
@ -757,7 +750,7 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
c.check_expected_arg_count(mut node, func) or { return func.return_type }
}
// println / eprintln / panic can print anything
if fn_name in ['println', 'print', 'eprintln', 'eprint', 'panic'] && node.args.len > 0 {
if node.args.len > 0 && fn_name in ['println', 'print', 'eprintln', 'eprint', 'panic'] {
c.inside_println_arg = true
c.expected_type = ast.string_type
node.args[0].typ = c.expr(node.args[0].expr)
@ -788,7 +781,7 @@ pub fn (mut c Checker) fn_call(mut node ast.CallExpr, mut continue_check &bool)
return func.return_type
}
// `return error(err)` -> `return err`
if fn_name == 'error' && node.args.len == 1 {
if node.args.len == 1 && fn_name == 'error' {
arg := node.args[0]
node.args[0].typ = c.expr(arg.expr)
if node.args[0].typ == ast.error_type {